NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM; 2021 MY Avalon [08/2020

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM100000001PROX
Model Year Start: 2021	Model: Avalon	Prod Date Range: [08/2020 - 08/2021]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM; 2021 MY Avalon [08/2020 - 08/2021]

DIAGNOSIS SYSTEM

CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION

(a) The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.

(1) Techstream display and installed systems

HINT:

The names of ECUs and sensors shown on the Techstream display may differ from those shown in DTC Table by ECU.

Connected to	Code	ECU/Sensor Name	Techstream Display	Applicability
-	CGW	Central gateway ECU (network gateway ECU)	-	Installed on all vehicles
-	DLC3	DLC3	-	Installed on all vehicles
Bus 1	F-CAM	Forward recognition camera	Front Camera Module	Installed on all vehicles
	F-MR	Millimeter wave radar sensor assembly	Front Radar	Installed on all vehicles
	BSM	Blind spot monitor sensor RH	Blind Spot Monitor Master	Installed on all vehicles
	R-CA	Television camera assembly	Parking Assist Monitor System / Rear Camera	Installed on all vehicles
	CS	Clearance warning ECU assembly	Clearance Warning (Intuitive Parking Assist)	Vehicles with Intelligent Clearance Sonar System
	DS	Driving support ECU assembly	Driving Support (Cruise Control-ACC)	Installed on all vehicles
	PAC	Parking assist ECU	Panoramic View Monitor / Circumference Monitoring Camera Control Module	Vehicles with Panoramic View Monitor System
Bus 2	ENG	ECM	ECM (Engine)	Installed on all vehicles
Bus 3	AV	Radio and display receiver assembly	Display and Navigation (AVN)	Installed on all vehicles
	DCM	DCM (telematics transceiver)	DCM	Vehicles with DCM (Telematics Transceiver)
	ANC	Stereo component equalizer assembly	Active Noise Control	Vehicles with Active Noise Control System
Bus 4	OCS	Occupant detection ECU	Occupant Detection	Installed on all vehicles
	TPMS	Tire pressure warning ECU and receiver	Tire Pressure	Installed on all vehicles
	EPS	Rack and pinion power steering gear assembly	Power Steering (EPS)	Installed on all vehicles
	BRK	Brake actuator assembly	Skid Control (ABS/VSC/TRAC)	Installed on all vehicles
	AWD	4WD ECU assembly	Four Wheel Drive Control	for AWD
	STR	Steering sensor	Spiral cable (Steering Angle Sensor)	Installed on all vehicles
	SUS	Absorber control ECU	Suspension Control (Air Suspension)	Vehicles with AVS
	SRS	Airbag ECU assembly	Airbag	Installed on all vehicles
Bus 5	A/C	Air conditioning amplifier assembly	Air Conditioning Amplifier	Installed on all vehicles
	SMT	Certification ECU (smart key ECU assembly)	Certification (Smart)	Installed on all vehicles
	MB	Main body ECU (multiplex network body ECU)	Main Body	Installed on all vehicles
	HUD	Meter mirror sub-assembly	Head Up Display	Vehicles with Headup Display System
	LITM	Headlight ECU sub-assembly LH	HL AutoLeveling/AFS/AHS	Vehicles with Cornering Light
	LITS	Headlight ECU sub-assembly RH	HL AutoLeveling/AFS/AHS (Sub)	Vehicles with Cornering Light
	MIR-L	Outer mirror control ECU assembly LH	Front Door LH/L-Mirror (FL-Door/L-Mirror)	Vehicles with Seat Position Memory System
	MIR-R	Outer mirror control ECU assembly RH	Front Door RH/R-Mirror (FR-Door/R-Mirror)	Vehicles with Seat Position Memory System
	DST	Position control ECU assembly LH	D-Seat	Vehicles with Seat Position Memory System
	T&T	Multiplex tilt and telescopic ECU	Multiplex Tilt and Telescopic	Vehicles with Power Tilt and Power Telescopic System
	MET	Combination meter assembly	Combination Meter	Installed on all vehicles

NOTICE:

The following communication bus check screen is provided only as an example. This screen differs from the actual screen for this vehicle.

Description of "Communication Bus Check" Screen

HINT:

The ECUs and sensors that are normally connected to the CAN communication system are displayed on the Techstream.

(a) Select "Communication Bus Check" on the menu screen of the Techstream.

CAN Bus Check

HINT:

If items are not selected correctly in the vehicle specification pop up screen, the name of the CAN junction connector to which the ECUs or sensors are connected may not be displayed on the "Communication Bus Check" screen.

(b) Confirm that the "Communication Bus Check" screen is displayed and the ECUs and sensors that are normally connected to the CAN communication system are displayed.

HINT:

Even if an ECU or sensor that is connected to a bus that is monitored by a bus monitoring ECU (gateway function equipped ECU) is not communicating, it will remain displayed on the "Communication Bus Check" screen.
When an ECU or sensor that is connected to a bus that is not monitored by a bus monitoring ECU (gateway function equipped ECU) is not displayed on the "Communication Bus Check" screen, it means that it is not communicating.

(c) The default display setting selected on the combo box is ALL. When checking for ECUs or sensors for a specific bus, choose the bus from the drop down list. ALL, each bus, each sub bus and Central Gateway are listed in the drop down list.

Combo box

Background color is red or yellow

Item	Detail
Combo box: ALL	Displays all ECUs and sensors connected to the central bus and sub buses.
Combo box: Bus	Displays ECUs and sensors connected to the selected bus.
Combo box: Sub bus	Displays ECUs and sensors connected to the selected sub bus.
Combo box: Central Gateway	Displays all ECUs and sensors connected to the central bus.

NOTICE:

When using the combo box, it may be possible to select a sub bus from the drop down list that does not have any connected ECUs or sensors. This is not a malfunction and occurs when there is no optional device connected to a sub bus which is monitored by a sub bus monitoring ECU (gateway function equipped ECU).
In the drop down list, all sub buses applicable to the model are displayed (e.g. LIN communication sub buses are also displayed). For information on sub buses necessary to diagnose the CAN communication system, refer to System Diagram.
Click here

HINT:

The background color of an ECU or sensor changes according to its connection status as indicated in the following table.

Description of "Communication Bus Check" Screen

Bus Type	Background Color	Connection Status
Bus	White	Communication has been normal.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Currently not communicating (either of the following): Not communicating since the start of the CAN bus check Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
	Not displayed	Either of the following: The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream.4 No ECUs or sensors are connected to the bus.5
Sub bus with a gateway function equipped ECU that does not memorize connected ECUs or sensors*2	White	Communication has been normal since the start of the CAN bus check.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
	Not displayed	Communication stop has continued since the start of the CAN bus check.*1
Sub bus with a gateway function equipped ECU that memorizes connected ECUs and sensors*3	White	Communication has been normal.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Currently not communicating (either of the following): Not communicating since the start of the CAN bus check Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
	Not displayed	Either of the following: The gateway function equipped ECU cannot communicate with the central gateway ECU.6 No ECUs or sensors are connected to the sub bus.7

Gateway function equipped ECUs relay signals between ECUs and sensors connected to different buses.
*1: An ECU or sensor is installed to the vehicle but is not displayed on the "Communication Bus Check" screen.
*2: The gateway function equipped ECU does not memorize ECUs and sensors connected to its respective sub bus.
*3: The gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus.
*4: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream, the name of buses, sub buses, ECUs and sensors will not be displayed.
*5: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.
*6: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.
*7: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.
If there is no communication between the Techstream and the vehicle, or no ECUs or sensors are displayed as connected, check the central gateway ECU (network gateway ECU) and diagnosis bus (the bus that connects the DLC3 to the central gateway ECU (network gateway ECU)) for malfunctions.

(d) Monitor the screen for any ECU or sensor connection status changes for a period of 2 minutes.

HINT:

If an open occurs in one of the wires of a CAN branch line, it may interfere with the communication of other ECUs or sensors resulting in an incorrect state being displayed.
If the connection status changes intermittently during the inspection, repair the open in the branch line of the ECU or sensor that is not communicating, and then perform Communication Bus Check again.

NOTICE:

The following communication bus check screen is provided only as an example. This screen differs from the actual screen for this vehicle.

Description of "Communication Bus Check (Detail)" Screen

HINT:

The communication error history of ECUs or sensors which have communication error history can be displayed on the "Communication Bus Check (Detail)" screen.

(a) Select "Communication Bus Check" on the menu screen of the Techstream.

CAN Bus Check

HINT:

(b) Select "Detail" on the "Communication Bus Check" screen.

Communication Bus Check (Detail)

(c) Confirm that the "Communication Bus Check (Detail)" screen is displayed and the communication error history of the ECUs or sensors up to present is displayed.

HINT:

Lost Communication Time and Lost Communication Trip are only displayed for the central bus.
Lost Communication Time and Lost Communication Trip are not displayed for sub buses.

(d) The default display setting selected on the combo box is ALL. When checking for ECUs or sensors for a specific bus, choose the bus from the drop down list. ALL, each bus, each sub bus and Central Gateway are listed in the drop down list.

Combo box

Background color is red

Item	Detail
Combo box: ALL	Displays all ECUs and sensors connected to the central bus and sub buses.
Combo box: Bus	Displays ECUs and sensors connected to the selected bus.
Combo box: Sub bus	Displays ECUs and sensors connected to the selected sub bus.
Combo box: Central Gateway	Displays all ECUs and sensors connected to the central bus.
Bus Monitoring ECU	Displays the gateway function equipped ECU which monitors the selected bus or sub bus.
Current Trip	Displays the total number of trips up to now*
Lost Communication Time(s)	Displays the longest period of time in seconds that the ECU or sensor connected to the central bus was not communicating.
Lost Communication Trip	Displays the trip in which the longest period of time that the ECU or sensor connected to the central bus was not communicating occurred.

*: If the component has been replaced with a new one, the total number of trips after the replacement is displayed.

NOTICE:

The Lost Communication Time column displays the longest period of time in seconds that the central gateway ECU (network gateway ECU) detected a communication stop in the respective ECU or sensor.
The Lost Communication Trip column displays the trip in which the central gateway ECU (network gateway ECU) detected the longest communication stop in the respective ECU or sensor.
When using the combo box, it may be possible to select a sub bus from the drop down list that does not have any connected ECUs or sensors. This is not a malfunction and occurs when there is no optional device connected to a sub bus which is monitored by a sub bus monitoring ECU (gateway function equipped ECU).
In the drop down list, all sub buses applicable to the model are displayed (e.g. LIN communication sub buses are also displayed). For information on sub buses necessary to diagnose CAN communication system, refer to the System Diagram.
Click here

HINT:

The background color of an ECU or sensor changes according to its connection status as indicated in the following table.

Description of "Communication Bus Check (Detail)" Screen

Bus Type	Background Color	Connection Status
Bus	White	Either of the following: Communication has been normal. Lost Communication Time is below 6 seconds.
	Red	Lost Communication Time is 6 seconds or more.
	Not displayed	Either of the following: The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream.1 No ECUs or sensors are connected to the bus.2
Sub bus	White	Lost Communication Time is displayed as "-".
Sub bus	Not displayed	Either of the following: The gateway function equipped ECU cannot communicate with the central gateway ECU.3 No ECUs or sensors are connected to the sub bus.4

If there is no communication between the Techstream and the vehicle, or no ECUs or sensors are displayed as connected, check the central gateway ECU (network gateway ECU) and diagnosis bus (the bus that connects the DLC3 to the central gateway ECU (network gateway ECU)) for malfunctions.
Lost Communication Time and Lost Communication Trip are not displayed for sub buses.
*1: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream, the name of buses, sub buses, ECUs and sensors will not be displayed.
*2: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.
*3: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.
*4: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.

Communication Bus Check (Communication Malfunction Check)

HINT:

DTCs related to CAN communication are displayed for each ECU on the Techstream.

(a) Select "Communication Bus Check" on the menu screen of the Techstream.

CAN Bus Check

(b) Select "Communication Malfunction Check" on the "Communication Bus Check" screen.

Communication Malfunction Check

(c) Confirm that the "Communication Malfunction Check" screen is displayed and CAN communication DTCs for each ECU are displayed.

HINT:

When there are no CAN communication DTCs stored, no DTCs will be displayed.

How to Use "Communication Bus Check" Screen in Inspection

NOTICE:

The following CAN bus wiring diagram or communication bus check screen is provided only as an example. This wiring diagram or screen differs from the actual one for this vehicle.

HINT:

If the CAN communication system is currently malfunctioning, it is recommended to use Communication Bus Check rather than Communication DTCs for determining the suspected area.
Turn the engine switch on (IG), or perform the necessary operations to reproduce the problem symptom, select "Communication Bus Check" and wait approximately 2 minutes. Check the communication status of each ECU or sensor on the screen while performing this operation.

(a) If the CAN communication system is currently malfunctioning, determine the suspected area using Communication Bus Check as follows:

Problem Symptoms Table

Problem Symptom Pattern	Display on Communication Bus Check Screen	Suspected Area
A	Almost all of the ECUs and sensors connected to the malfunctioning CAN bus are displayed as not communicating on the "Communication Bus Check" screen.	Short between CAN bus lines (CANH and CANL) Short to +B in a CAN bus line (CANH or CANL) Short to ground in a CAN bus line (CANH or CANL)
B	ECUs or sensors farther from the central gateway ECU (network gateway ECU) than the open in the wires are displayed as not communicating on the "Communication Bus Check" screen.	Open in both wires of a main bus line in the central bus
C	One ECU or sensor is displayed as not communicating on the "Communication Bus Check" screen.	Open in both wires of a branch line connected to an ECU or sensor in the central bus Internal malfunction of an ECU or sensor in the central bus Malfunction in the power supplied to an ECU or sensor in the central bus
D	No ECUs or sensors are displayed on the "Communication Bus Check" screen.	Internal malfunction of the central gateway ECU (network gateway ECU) Malfunction in the power supplied to the central gateway ECU (network gateway ECU) Open in both wires of the branch line in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU)) Short between CAN bus lines (CANH and CANL) in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU)) Short to +B in a CAN bus line (CANH or CANL) in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU)) Short to ground in a CAN bus line (CANH or CANL) in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU))
E	One ECU or sensor is displayed as not communicating in multiple buses on the "Communication Bus Check" screen.	Internal malfunction of an ECU or sensor connected to multiple buses Malfunction in the power supplied to an ECU or sensor connected to multiple buses
F	Some ECUs or sensors are displayed as not communicating in the central bus and other ECUs or sensors are displayed as not communicating in a sub bus.	Open in a wire of a branch line connected to an ECU or sensor in the central bus Internal malfunction of an ECU or sensor in the central bus
G	A gateway function equipped ECU is displayed as not communicating in the central bus and ECUs and sensors connected to its respective sub bus are not displayed.	Open in both wires of a branch line connected to a gateway function equipped ECU Internal malfunction of a gateway function equipped ECU Malfunction in the power supplied to a gateway function equipped ECU
H	One ECU or sensor is displayed as not communicating in a sub bus on the "Communication Bus Check" screen.	Open in both wires of a branch line connected to an ECU or sensor in a sub bus Internal malfunction of an ECU or sensor in a sub bus Malfunction in the power supplied to an ECU or sensor in a sub bus
I	ECUs or sensors farther from the sub bus monitoring ECU (gateway function equipped ECU) than the open in the wires are displayed as not communicating on the "Communication Bus Check" screen.	Open in both wires of a main bus line in a sub bus

(b) Problem Symptom Pattern A

Details of Malfunction

Short between CAN bus lines (CANH and CANL) in Bus 2
Short to +B in a CAN bus line (CANH or CANL) in Bus 2
Short to ground in a CAN bus line (CANH or CANL) in Bus 2

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

Due to the malfunction, almost all of the ECUs and sensors connected to Bus 2 will be displayed as not communicating and their background color will be red.
The malfunction in Bus 2 will not affect the other buses.
The malfunctioning part can be determined by inspecting for an open in the main bus line, a short between bus lines or a short to +B or ground.
Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

Details of Malfunction

Short between CAN bus lines (CANH and CANL) in Bus 4
Short to +B in a CAN bus line (CANH or CANL) in Bus 4
Short to ground in a CAN bus line (CANH or CANL) in Bus 4

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red
*g	Not displayed	-	-

HINT:

Due to the malfunction, almost all of the ECUs and sensors connected to Bus 4 will be displayed as not communicating and their background color will be red.
The malfunction will not affect the other buses of the central bus. However, the sub bus connected to Bus 4 is likely to be affected. The gateway function equipped ECU connected to Bus 4 will not communicate and consequently the sub bus and its respective ECUs or sensors monitored by the gateway function equipped ECU (sub bus monitoring ECU) will not be displayed, indicating that the gateway function equipped ECU is not communicating with the central gateway ECU (network gateway ECU).
The malfunctioning part can be determined by inspecting for an open in the main bus line, a short between bus lines or a short to +B or ground.
Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

Details of Malfunction

Open in both wires of the main bus line between the CGW and No. 1 CAN junction connector in Bus 2

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

Due to the malfunction, almost all of the ECUs and sensors connected to Bus 2 will be displayed as not communicating and their background color will be red.
The malfunction in Bus 2 will not affect the other buses.
The malfunctioning part can be determined by inspecting for an open in the main bus line.
Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

Details of Malfunction

Open in both wires of the main bus line between the No. 1 CAN junction connector and No. 2 CAN junction connector in Bus 2

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

Due to the malfunction, ECUs or sensors farther from the CGW than the open in the wires will be displayed as not communicating and their background color will be red.
The malfunction in Bus 2 will not affect the other buses.
The malfunctioning part can be determined by inspecting for an open in the main bus line.
Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

Details of Malfunction

Open in both wires of the main bus line between the No. 2 CAN junction connector and ENG in Bus 2

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red
*g	Pattern 1	*h	Pattern 2

HINT:

Even when the same part of the main bus line is open, depending on internal electrical noise which changes according to the position of the open in the line, the information displayed on the "Communication Bus Check" screen may differ.
In pattern 2, the information displayed may be the same as when there is an open in both wires in the main bus line between the No. 1 CAN junction connector and No. 2 CAN junction connector, which may make it difficult to determine the malfunctioning part.
The malfunction in Bus 2 will not affect the other buses.
Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

(d) Problem Symptom Pattern C

Details of Malfunction

Open in both wires of the branch line connected to F-MGC in Bus 2

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor. In this example, the background color of the malfunctioning ECU or sensor will be red.

Details of Malfunction

Internal malfunction of F-MGC in Bus 2
Malfunction in the power supplied to F-MGC in Bus 2

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

Details of Malfunction

Open in both wires of the branch line connected to ENG in Bus 4

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

The malfunction in Bus 4 will not affect the other buses.
Due to the malfunction, although ENG is communicating normally with CGW via Bus 2, it is not communicating with CGW via Bus 4. Consequently, it will be displayed as not communicating in Bus 4.

(e) Problem Symptom Pattern D

Details of Malfunction

Internal malfunction of the CGW
Malfunction in the power supplied to the CGW

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Not displayed

HINT:

When there is no communication between the Techstream and the vehicle, no ECUs or sensors will be displayed.

Details of Malfunction

Open in both wires of the branch lines in the diagnosis bus

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Not displayed

HINT:

When there is no communication between the Techstream and the vehicle, no ECUs or sensors will be displayed.

(f) Problem Symptom Pattern E

Details of Malfunction

Internal malfunction of BRK
Malfunction in the power supplied to BRK

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

The information displayed on the "Communication Bus Check" screen will be the same for an internal malfunction of an ECU or sensor, or a malfunction in the power supplied to an ECU or sensor.

Due to the malfunction, BRK is not communicating with the CGW via both Bus 2 and Bus 4. Consequently, the background color of BRK will be red for both Bus 2 and Bus 4.

(g) Problem Symptom Pattern F

Details of Malfunction

Open in a wire of the branch line connected to HV in Bus 4
Internal malfunction of HV in Bus 4

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red
*g	Background color intermittently becomes yellow or red	*h	Not displayed or background color is yellow or red

HINT:

In the "Communication Bus check" screen shown in the illustration, electrical noise in the CAN bus caused by an open in a wire in the branch line connected to HV interferes with the communication of MB causing unstable communication. Also, since MB is a gateway function equipped ECU, communication of ECUs connected to its respective sub bus will also be unstable.
In the "Communication Bus Check" screen shown in the illustration, because the background color of HV is red, it is suspected that HV is the most likely cause of the malfunction. Therefore, it is suspected that HV is not communicating.

(h) Problem Symptom Pattern G

Details of Malfunction

Open in both wires of the branch line connected to MB in Bus 4
Internal malfunction of MB in Bus 4
Malfunction in the power supplied to MB in Bus 4

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red
*g	Not displayed	-	-

HINT:

If there is a communication malfunction in a gateway function equipped ECU, ECUs connected to its respective sub bus will also be affected and will not be displayed.
In the "Communication Bus Check" screen shown in the illustration, MB is a gateway function equipped ECU. Therefore, MB is suspected as not communicating.

(i) Problem Symptoms Pattern H

Details of Malfunction

Internal malfunction of MIR-L in the sub bus
Malfunction in the power supplied to MIR-L in the sub bus

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

The malfunction in the sub bus will not affect the other buses.
When a gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus and there is a communication malfunction in one of the ECUs or sensors, the background color of the ECU or sensor will change to red and the ECU or sensor will remain displayed.
The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor.

Details of Malfunction

Open in both wires of the branch line connected to MIR-L in the sub bus

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

The malfunction in the sub bus will not affect the other buses.
When a gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus and there is a communication malfunction in one of the ECUs or sensors, the background color of the ECU or sensor will change to red and the ECU or sensor will remain displayed.
The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor.

(j) Problem Symptom Pattern I

Details of Malfunction

Open in both wires of the main bus line in the sub bus

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

HINT:

Due to the malfunction, ECUs or sensors farther from the sub bus monitoring ECU (gateway function equipped ECU) than the open in the wires will be displayed as not communicating and their background color will be red.

How to Use "Communication Bus check (Detail)" Screen in Inspection

(a) If the CAN communication system is currently normal but has communication stop history, determine the malfunctioning part using Communication Bus Check (Detail) as follows:

NOTICE:

The following CAN bus wiring diagram or communication bus check screen is provided only as an example. This wiring diagram or screen differs from the actual one for this vehicle.
The Lost Communication Time column displays the longest period of time in seconds that the central gateway ECU (network gateway ECU) detected a communication stop in the respective ECU or sensor.
The Lost Communication Trip column displays the trip in which the central gateway ECU (network gateway ECU) detected the longest communication stop in the respective ECU or sensor.
When using the combo box, it may be possible to select a sub bus from the drop down list that does not have any connected ECUs or sensors. This is not a malfunction and occurs when there is no optional device connected to a sub bus which is monitored by a sub bus monitoring ECU (gateway function equipped ECU).
In the drop down list, all sub buses applicable to the model are displayed (e.g. LIN communication sub buses are also displayed). For information on sub buses necessary to diagnose CAN communication system, refer to the System Diagram.
Click here

HINT:

If the CAN communication system is currently malfunctioning, it is recommended to use Communication Bus Check rather than Communication Bus Check (Detail) for determining the suspected area.
The communication error history of ECUs or sensors which have communication error history can be displayed on the "Communication Bus Check (Detail)" screen.
Lost Communication Time and Lost Communication Trip are only displayed for the central bus.
Lost Communication Time and Lost Communication Trip are not displayed for sub buses.

(b) If there is an ECU or sensor displayed with a red background on the "Communication Bus Check (Detail)" screen to indicate that it was not communicating, it is suspected that the ECU or sensor was not communicating.

Details of Malfunction

Past malfunction in the wire harness or power supplied to F-MGC in Bus 2

*a	Bus 2	*b	Bus 4
*c	Sub bus	*d	Diagnosis bus
*e	Location of malfunction	*f	Background color is red

Description of "Communication Bus Check (Detail)" Screen

Bus Type	Background Color	Connection Status
Bus	White	Either of the following: Communication has been normal. Lost Communication Time is below 6 seconds.
	Red	Lost Communication Time is 6 seconds or more.
	Not displayed	Either of the following: The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream.1 No ECUs or sensors are connected to the bus.2
Sub bus	White	Lost Communication Time is displayed as "-".
Sub bus	Not displayed	Either of the following: The gateway function equipped ECU cannot communicate with the central gateway ECU.3 No ECUs or sensors are connected to the sub bus.4

HINT:

Check the values of Lost Communication Trip and Current Trip for the ECUs or sensors that have a red background color.
If the values of Lost Communication Trip and Current Trip are the same for an ECU or sensor, the ECU or sensor is currently not communicating. In this case, it is recommended to use Communication Bus Check rather than Communication Bus Check (Detail) for determining the suspected area.
In the "Communication Bus Check (Detail)" screen shown in the illustration, F-MGC had a communication malfunction in the 10th trip. Thus, it is suspected that F-MGC was not communicating.
*1: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the Techstream, the name of buses, sub buses, ECUs and sensors will not be displayed.
*2: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.
*3: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.
*4: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.

DTC TABLE BY ECU

HINT:

In the CAN communication system, the CAN communication DTCs of each ECU can be displayed using the Techstream.
If CAN communication system DTCs are output, the malfunction cannot be determined only by the DTCs. Perform troubleshooting according to How to Proceed with Troubleshooting.
Click here
DTCs will only be stored if the Check Procedure is performed when the system is currently malfunctioning.

(a) ECM(for 2GR-FKS) / Techstream Display "Engine"

Powertrain > Engine > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to SFI System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U010187*	Lost Communication with TCM Missing Message	The ECM does not receive data from the TCM for approximately 2 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 1 second or more. The power source voltage of the ECM is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	The ECM does not receive data from the combination meter assembly for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 1 second or more. The power source voltage of the ECM is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.

(b) ECM(for A25A-FKS) / Techstream Display "Engine"

Powertrain > Engine > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to SFI System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U010187*	Lost Communication with TCM Missing Message	The ECM does not receive data from the TCM for approximately 2 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 1 second or more. The power source voltage of the ECM is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.
U011487	Lost Communication with Four-Wheel Drive Clutch Control Module Missing Message	The ECM does not receive data from the 4WD ECU assembly for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the ECM is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.
U012987	Lost Communication with Brake System Control Module Missing Message	The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 2 seconds or more. The power source voltage of the ECM is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	The ECM does not receive data from the combination meter assembly for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the ECM is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.

Powertrain > Transmission > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Automatic Transaxle System.
for UA80E:

Click here

for UB80F:

Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U010087*	Lost Communication with ECM/PCM "A" Missing Message	The TCM does not receive data from the ECM for approximately 2 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 1 second or more. The power source voltage of the ECM is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.

(d) ECM / Techstream Display "Radar Cruise1"

Powertrain > Radar Cruise1 > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U010087	Lost Communication with ECM/PCM "A" Missing Message	The brake actuator assembly does not receive data from the ECM for approximately 1 second or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The cruise control main switch is on. The power source voltage of the ECM is 10.5 V or more. Vehicle speed is 5 km/h (3 mph) or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 2 seconds or more.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U012287	Lost Communication with Vehicle Dynamics Control Module Missing Message	The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The cruise control main switch is on. The power source voltage of the ECM is 10.5 V or more.	Turn the cruise control main switch on and wait for at least approximately 4 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U110487	Lost Communication with Driving Support ECU Missing Message	The ECM does not receive data from the driving support ECU assembly for approximately 2 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The cruise control main switch is on. The power source voltage of the ECM is 10.5 V or more.	Turn the cruise control main switch on and wait for at least approximately 3 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(e) Brake Actuator Assembly / Techstream Display "ABS/VSC/TRAC/EPB"

Chassis > ABS/VSC/TRAC/EPB > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0073	Control Module Communication Bus Off	Bus off is judged.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	ABS warning light illuminates. Slip indicator light illuminates. Brake warning light / red (malfunction) illuminates. Brake hold operated indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0100	Lost Communication With ECM/PCM "A"	The brake actuator assembly does not receive data from the ECM for approximately 2 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V. Vehicle speed is 6 km/h (4 mph) or more.	Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 5 seconds or more.	Slip indicator light illuminates. Brake hold operated indicator light blinks. Brake warning light / yellow (minor malfunction) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0123	Lost Communication With Yaw Rate Sensor Module	The brake actuator assembly does not receive data from the airbag ECU assembly for approximately 1 second or more.	All conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V. Vehicle speed is 6 km/h (4 mph) or more.	Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 4 seconds or more.	Slip indicator light illuminates. Brake hold operated indicator light blinks. Brake warning light / yellow (minor malfunction) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication With Steering Angle Sensor Module	The brake actuator assembly does not receive data from the steering sensor for approximately 1 second or more.	All conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V. Vehicle speed is 6 km/h (4 mph) or more.	Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 4 seconds or more.	Slip indicator light illuminates. Brake hold operated indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The brake actuator assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 2 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V. Vehicle speed is 6 km/h (4 mph) or more.	Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 5 seconds or more.	Brake warning light / yellow (minor malfunction) illuminates. Brake hold operated indicator light blinks.	-	DTC is stored until it is cleared using the Techstream.
U0151	Lost Communication With Restraints Control Module	The brake actuator assembly does not receive data from the airbag ECU assembly for approximately 5 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V. Vehicle speed is 6 km/h (4 mph) or more.	Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 8 seconds or more.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(f) Rack and Pinion Power Steering Gear Assembly / Techstream Display "EMPS"

Chassis > EMPS > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The rack and pinion power steering gear assembly does not receive data from the ECM for approximately 5 minutes or more.	All conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the rack and pinion power steering gear assembly is 9 V or more. Vehicle speed is 20 km/h (12 mph) or more.	Drive the vehicle at a speed of 20 km/h (12 mph) or more for approximately 5 minutes or more.	-	-	DTC remains stored only while malfunction is occurring.
U0126	Lost Communication with Steering Angle Sensor Module	The rack and pinion power steering gear assembly does not receive data from the steering sensor for approximately 6 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the rack and pinion power steering gear assembly is 9 V or more.	Turn the engine switch on (IG) and wait for at least approximately 9 seconds.	EPS warning light illuminates.	-	DTC remains stored only while malfunction is occurring.
U0129	Lost Communication with Brake System Control Module	The rack and pinion power steering gear assembly does not receive data from the brake actuator assembly for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the rack and pinion power steering gear assembly is 9 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	EPS warning light illuminates.	-	DTC remains stored only while malfunction is occurring.
U0132	Lost Communication with Ride Level Control Module	The rack and pinion power steering gear assembly does not receive data from the absorber control ECU for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the rack and pinion power steering gear assembly is 9 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	EPS warning light illuminates.	-	DTC remains stored only while malfunction is occurring.
U023A	Lost Communication with Front Camera Module	The rack and pinion power steering gear assembly does not receive data from the forward recognition camera for approximately 2 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the rack and pinion power steering gear assembly is 9 V or more.	Turn the engine switch on (IG) and wait for at least approximately 5 seconds.	-	-	DTC remains stored only while malfunction is occurring.

(g) Airbag ECU Assembly / Techstream Display "SRS Airbag"

Body Electrical > SRS Airbag > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0154	Lost Communication with Restraints Occupant Classification System Module	The airbag ECU assembly does not receive data from the occupant detection ECU for approximately 5 seconds or more.	The engine switch is on (IG) for approximately 3 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	SRS warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.

(h) Occupant Detection ECU / Techstream Display "Occupant Detection"

Body Electrical > Occupant Detection > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0125	Lost Communication With Multi-axis Acceleration Sensor Module	The occupant detection ECU does not receive data from the airbag ECU assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the occupant detection ECU is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	SRS warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication With Brake System Control Module	The occupant detection ECU does not receive data from the brake actuator assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the occupant detection ECU is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	SRS warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.

(i) Main Body ECU (Multiplex Network Body ECU) / Techstream Display "Main Body"

Body Electrical > Main Body > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication With ECM/PCM "A"	The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0120	Lost Communication With Starter / Generator Control Module	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The main body ECU (multiplex network body ECU) does not receive data from the steering sensor for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The main body ECU (multiplex network body ECU) does not receive data from the brake actuator assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0151	Lost Communication with Restraints Control Module	The main body ECU (multiplex network body ECU) does not receive data from the airbag ECU assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The main body ECU (multiplex network body ECU) does not receive data from the combination meter assembly for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC OFF ←→ ON, IG OFF ←→ ON) is detected and approximately 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0163	Lost Communication with Navigation Control Module	The main body ECU (multiplex network body ECU) does not receive data from the radio and display receiver assembly for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC OFF ←→ ON, IG OFF ←→ ON) is detected and approximately 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0164	Lost Communication with HVAC Control Module	The main body ECU (multiplex network body ECU) does not receive data from the air conditioning amplifier assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0182	Lost Communication with AFS	The main body ECU (multiplex network body ECU) does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC OFF ←→ ON, IG OFF ←→ ON) is detected and approximately 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	Automatic high beam indicator light flashes.	-	DTC is stored until it is cleared using the Techstream.
U0199	Lost Communication with "Door Control Module A"	The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly RH for approximately 10 seconds or more.	Power source status change (+B OFF → ON, ACC OFF ←→ ON, IG OFF ←→ ON) is detected and approximately 10 seconds or more elapse.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0200	Lost Communication with "Door Control Module B"	The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly LH for approximately 10 seconds or more.	Power source status change (+B OFF → ON, ACC OFF ←→ ON, IG OFF ←→ ON) is detected and approximately 10 seconds or more elapse.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0208	Lost Communication with "Seat Control Module A"	The main body ECU (multiplex network body ECU) does not receive data from the position control ECU assembly LH for approximately 10 seconds or more.	Power source status change (+B OFF → ON, ACC OFF ←→ ON, IG OFF ←→ ON) is detected and approximately 10 seconds or more elapse.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U023A	Lost Communication With Image Processing Module "A"	The main body ECU (multiplex network body ECU) does not receive data from the forward recognition camera for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC OFF ←→ ON, IG OFF ←→ ON) is detected and approximately 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	Automatic high beam indicator light flashes.	-	DTC is stored until it is cleared using the Techstream.
U0327	Software Incompatibility with Vehicle Security Control Module	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U1106	Lost Communication with Electric Parking Brake Module	The main body ECU (multiplex network body ECU) does not receive data from the brake actuator assembly for approximately 10 seconds or more.	The engine switch is on (IG) for approximately 10 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U1115	Lost Communication with Tilt & Telescopic Module	The main body ECU (multiplex network body ECU) does not receive data from the multiplex tilt and telescopic ECU for approximately 10 seconds or more.	Power source status change (+B OFF → ON, ACC OFF ←→ ON, IG OFF ←→ ON) is detected and approximately 10 seconds or more elapse.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(j) Certification ECU (Smart Key ECU Assembly) / Techstream Display "Smart Key"

Body Electrical > Smart Key > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication With ECM/PCM "A"	The certification ECU (smart key ECU assembly) does not receive data from the ECM for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(k) Certification ECU (Smart Key ECU Assembly) / Techstream Display "Power Source Control"

Body Electrical > Power Source Control > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	ECM Communication	The certification ECU (smart key ECU assembly) does not receive data from the ECM for approximately 4 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0140	Lost Communication with Body Control Module	The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 3 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for approximately 4 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(l) Combination Meter Assembly / Techstream Display "Combination Meter"

Body Electrical > Combination Meter > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U010087	Lost Communication with ECM/PCM "A" Missing Message	The combination meter assembly does not receive data from the ECM for approximately 4 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.
U011487	Lost Communication with Four-Wheel Drive Clutch Control Module Missing Message	The combination meter assembly does not receive data from the 4WD ECU assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U012987	Lost Communication with Brake System Control Module Missing Message	The combination meter assembly does not receive data from the brake actuator assembly for approximately 4 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	ABS warning light illuminates. VSC OFF indicator light illuminates. Brake warning light / red (malfunction) illuminates.	-	DTC is stored until it is cleared using the Techstream.
U013187	Lost Communication with Power Steering Control Module Missing Message	The combination meter assembly does not receive data from the rack and pinion power steering gear assembly for approximately 4 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	EPS warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.
U014287	Lost Communication with Body Control Module "B" Missing Message	The combination meter assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U015187	Lost Communication with Restraints Control Module Missing Message	The combination meter assembly does not receive data from the airbag ECU assembly for approximately 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	SRS warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.
U016387	Lost Communication with Navigation Control Module Missing Message	The combination meter assembly does not receive data from the radio and display receiver assembly for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 5 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U016487	Lost Communication with HVAC Control Module Missing Message	The combination meter assembly does not receive data from the air conditioning amplifier assembly for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U018287	Lost Communication with Lighting Control Module Front Missing Message	The combination meter assembly does not receive data from the headlight ECU sub-assembly LH for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U023387	Lost Communication with Side Obstacle Detection Control Module "B" Missing Message	The combination meter assembly does not receive data from the blind spot monitor sensor RH for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U023A87	Lost Communication with Image Processing Module "A" Missing Message	The combination meter assembly does not receive data from the driving support ECU assembly or forward recognition camera for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 5 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U032787	Software Incompatibility with Vehicle Security Control Module Missing Message	The combination meter assembly does not receive data from the certification ECU (smart key ECU assembly) for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U110487	Lost Communication with Driving Support ECU Missing Message	The combination meter assembly does not receive data from the driving support ECU assembly for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	PCS warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.
U110687	Lost Communication with Electric Parking Brake Module Missing Message	The combination meter assembly does not receive data from the brake actuator assembly for approximately 4 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	Brake warning light / red (malfunction) illuminates.	-	DTC is stored until it is cleared using the Techstream.
U111087	Lost Communication with Intuitive Parking Assist Module Missing Message	The combination meter assembly does not receive data from the clearance warning ECU assembly for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U111287	Lost Communication with Combination Switch Module Missing Message	The combination meter assembly does not receive data from the steering sensor for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U113387	Lost Communication with PMN Module Missing Message	The combination meter assembly does not receive data from the certification ECU (smart key ECU assembly) for approximately 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(m) Meter Mirror Sub-assembly / Techstream Display "Head Up Display"

Body Electrical > Head Up Display > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U010087	Lost Communication with ECM/PCM "A" Missing Message	The meter mirror sub-assembly does not receive data from the ECM for approximately 4 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U012987	Lost Communication with Brake System Control Module Missing Message	The meter mirror sub-assembly does not receive data from the brake actuator assembly for approximately 4 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U014287	Lost Communication with Body Control Module "B" Missing Message	The meter mirror sub-assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	The meter mirror sub-assembly does not receive data from the combination meter assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U016387	Lost Communication with Navigation Control Module Missing Message	The meter mirror sub-assembly does not receive data from the radio and display receiver assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U016487	Lost Communication with HVAC Control Module Missing Message	The meter mirror sub-assembly does not receive data from the air conditioning amplifier assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U023A87	Lost Communication with Image Processing Module "A" Missing Message	The meter mirror sub-assembly does not receive data from the forward recognition camera for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U110487	Lost Communication with Driving Support ECU Missing Message	The meter mirror sub-assembly does not receive data from the driving support ECU assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U111087	Lost Communication with Intuitive Parking Assist Module Missing Message	The meter mirror sub-assembly does not receive data from the clearance warning ECU assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(n) Air Conditioning Amplifier Assembly / Techstream Display "Air Conditioner"

Body Electrical > Air Conditioner > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication With ECM/PCM "A"	The air conditioning amplifier assembly does not receive data from the ECM for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0131	Lost Communication With Power Steering Control Module	The air conditioning amplifier assembly does not receive data from the rack and pinion power steering gear assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication With Body Control Module "B"	The air conditioning amplifier assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0151	Lost Communication With Restraints Control Module	The air conditioning amplifier assembly does not receive data from the airbag ECU assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication With Instrument Panel Cluster (IPC) Control Module	The air conditioning amplifier assembly does not receive data from the combination meter assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0163	Lost Communication With Navigation Control Module	The air conditioning amplifier assembly does not receive data from the radio and display receiver assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(o) Forward Recognition Camera / Techstream Display "LKA/LDA"

Chassis > LKA/LDA > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Lane Departure Alert System (w/ Steering Control).
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.	All conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on. Vehicle speed is 1 km/h or 1 mph or more.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 7 seconds or more.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.	All conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on. Vehicle speed is 1 km/h or 1 mph or more.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 7 seconds or more.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0123	Lost Communication with Yaw Rate Sensor Module	The forward recognition camera does not receive data from the airbag ECU assembly for approximately 5 seconds or more.	All conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on. Vehicle speed is 1 km/h or 1 mph or more.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 7 seconds or more.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The forward recognition camera does not receive data from the steering sensor for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least approximately 7 seconds.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least approximately 7 seconds.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0131	Lost Communication with Power Steering Control Module	The forward recognition camera does not receive data from the rack and pinion power steering gear assembly for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least approximately 7 seconds.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least approximately 7 seconds.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module (Combination Meter)	The forward recognition camera does not receive data from the combination meter assembly for approximately 50 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least approximately 52 seconds.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0235*	Lost Communication with Cruise Control Front Distance Range Sensor	The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least approximately 7 seconds.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U023A*	Lost Communication with Image Processing Module "A"	The forward recognition camera does not receive data from the rack and pinion power steering gear assembly for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least approximately 7 seconds.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1104*	Lost Communication with Driving Support ECU	The forward recognition camera does not receive data from the driving support ECU assembly for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. LDA main switch is on.	Turn the engine switch on (IG), turn the lane departure alert system on using the LDA main switch and wait at least approximately 7 seconds.	Lane departure alert indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(p) Forward Recognition Camera / Techstream Display "Front Recognition Camera"

Chassis > Front Recognition Camera > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Front Camera System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 7 seconds or more.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 7 seconds or more.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0123	Lost Communication with Yaw Rate Sensor Module	The forward recognition camera does not receive data from the airbag ECU assembly for approximately 5 seconds or more.	Both conditions are met: The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 7 seconds or more.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.	The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.	The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0235*	Lost Communication with Cruise Control Front Distance Range Sensor	The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.	The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1104*	Lost Communication with Driving Support ECU	The forward recognition camera does not receive data from the driving support ECU assembly for approximately 5 seconds or more.	The power source voltage (IGB terminal voltage) of the forward recognition camera is 10 V or more for approximately 2 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 7 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(q) Blind Spot Monitor Sensor RH / Techstream Display "Blind Spot Monitor Master"

Body Electrical > Blind Spot Monitor Master > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Blind Spot Monitor System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The blind spot monitor sensor RH does not receive data from the ECM for approximately 11 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 12 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0125	Lost Communication with Yaw Rate Sensor Module	The blind spot monitor sensor RH does not receive data from the airbag ECU assembly for approximately 4 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 5 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The blind spot monitor sensor RH does not receive data from the steering sensor for approximately 4 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 5 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The blind spot monitor sensor RH does not receive data from the brake actuator assembly for approximately 4 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 2 seconds or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 6 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The blind spot monitor sensor RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 11 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 12 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0232*	Lost Communication with Blind Spot Monitor Slave Module	The blind spot monitor sensor RH does not receive data from the blind spot monitor sensor LH for approximately 13 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 14 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1331*	Software Incompatibility with Body Control Module "B"	Destination information of the main body ECU (multiplex network body ECU) and blind spot monitor sensor RH do not match.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 1 second.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(r) Blind Spot Monitor Sensor LH / Techstream Display "Blind Spot Monitor Slave"

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Blind Spot Monitor System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100*	Lost Communication with ECM/PCM "A"	The blind spot monitor sensor LH does not receive data from the ECM for approximately 11 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 12 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0125*	Lost Communication with Yaw Rate Sensor Module	The blind spot monitor sensor LH does not receive data from the airbag ECU assembly for approximately 4 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 5 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126*	Lost Communication with Steering Angle Sensor Module	The blind spot monitor sensor LH does not receive data from the steering sensor for approximately 4 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 5 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129*	Lost Communication with Brake System Control Module	The blind spot monitor sensor LH does not receive data from the brake actuator assembly for approximately 4 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 2 seconds or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 6 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0142*	Lost Communication with Body Control Module "B"	The blind spot monitor sensor LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 11 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 12 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0233*	Lost Communication with Blind Spot Monitor Master Module	The blind spot monitor sensor LH does not receive data from the blind spot monitor sensor RH for approximately 13 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 14 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1331*	Software Incompatibility with Body Control Module "B"	Destination information of the main body ECU (multiplex network body ECU) and blind spot monitor sensor LH do not match.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The blind spot monitor main switch is on. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the engine switch on (IG), turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 1 second.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(s) Tire Pressure Warning ECU and Receiver / Techstream Display "Tire Pressure Monitor"

Chassis > Tire Pressure Monitor > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0129	Lost Communication with Brake System Control Module	The tire pressure warning ECU and receiver does not receive data from the brake actuator assembly for approximately 60 seconds or more.	The engine switch is on (IG) for approximately 1 second or more.	Turn the engine switch on (IG) and wait for at least approximately 61 seconds.	-	-	DTC remains stored only while malfunction is occurring.

(t) Radio and Display Receiver Assembly / Techstream Display "Navigation System"

Body Electrical > Navigation System > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0073	Sending Malfunction (Navigation to APGS)	The radio and display receiver assembly does not send/receive data for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0100	Engine ECU Communication	The radio and display receiver assembly does not receive data from the ECM for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0129	VSC(ECB)ECU Communication	The radio and display receiver assembly does not receive data from the brake actuator assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0140	Lost Communication with Body Control Module	The radio and display receiver assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0155	Meter ECU Communication	The radio and display receiver assembly does not receive data from the combination meter assembly for approximately 30 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 30 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 60 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0164	Air Conditioner ECU Communication	The radio and display receiver assembly does not receive data from the air conditioning amplifier assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0198	Lost Communication with Telematic Control Module	The radio and display receiver assembly does not receive data from the DCM (telematics transceiver) for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U023B	Lost Communication with Image Processing Module "B"	The radio and display receiver assembly does not receive data from the parking assist ECU for approximately 12 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 12 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 24 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0265	Lost Communication with Image Processing Sensor A	The radio and display receiver assembly does not receive data from the television camera assembly for approximately 12 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 12 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 24 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U1110	Clearance Sonar ECU Communication	The radio and display receiver assembly does not receive data from the clearance warning ECU assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(u) DCM (Telematics Transceiver) / Techstream Display "Telematics"

Body Electrical > Telematics > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U014087	Lost Communication with Body Control Module "B"	The DCM (telematics transceiver) does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The DCM (telematics transceiver) does not receive data from the combination meter assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U016387	Lost Communication with Navigation Control Module	The DCM (telematics transceiver) does not receive data from the radio and display receiver assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 10 seconds or more. The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(v) Television Camera Assembly / Techstream Display "Parking Assist Camera"

Chassis > Parking Assist Camera > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: The television camera assembly stores U1000 if an internal error related to the CAN communication system is detected.
w/ Parking Assist Monitor System:

Click here

w/ Panoramic View Monitor System:

Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The television camera assembly does not receive data from the ECM for approximately 11 seconds or more.	The engine switch is on (IG) for approximately 3 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The television camera assembly does not receive data from the steering sensor for approximately 11 seconds or more.	The engine switch is on (IG) for approximately 3 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The television camera assembly does not receive data from the brake actuator assembly for approximately 11 seconds or more.	The engine switch is on (IG) for approximately 3 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0140	Lost Communication with Body Control Module	The television camera assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 11 seconds or more.	The engine switch is on (ACC) for approximately 3 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0163	Lost Communication with Navigation Control Module	The television camera assembly does not receive data from the radio and display receiver assembly for approximately 11 seconds or more.	The engine switch is on (ACC) for approximately 3 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0233	Lost Communication with Blind Spot Monitor Master Module	The television camera assembly does not receive data from the blind spot monitor sensor RH for approximately 11 seconds or more.	The engine switch is on (IG) for approximately 3 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U023B	Lost Communication with Panoramic View Monitor Control Module	The television camera assembly does not receive data from the parking assist ECU for approximately 11 seconds or more.	The engine switch is on (IG) for approximately 3 seconds or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U1000*	CAN Communication Failure(Message Registry)	When the engine switch is turned on (IG), a CAN communication malfunction is detected.	The engine switch is on (IG).	Turn the engine switch on (IG).	-	-	DTC remains stored only while malfunction is occurring.

(w) Parking Assist ECU / Techstream Display "Panoramic View Monitor"

Chassis > Panoramic View Monitor > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Panoramic View Monitor System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0073	Control Module Communication Bus Off	The parking assist ECU does not send/receive data consecutively 13 times.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 16 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0100	Lost Communication with ECM/PCM "A"	The parking assist ECU does not receive data from the ECM for approximately 11 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The parking assist ECU does not receive data from the steering sensor for approximately 11 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The parking assist ECU does not receive data from the brake actuator assembly for approximately 2 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 5 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0140	Lost Communication with Body Control Module	The parking assist ECU does not receive data from the main body ECU (multiplex network body ECU) for approximately 11 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0163	Lost Communication with Navigation Control Module	The parking assist ECU does not receive data from the radio and display receiver assembly for approximately 11 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0233	Lost Communication with Blind Spot Monitor Master Module	The parking assist ECU does not receive data from the blind spot monitor sensor RH for approximately 11 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0265	Lost Communication with Image Processing Sensor A	The parking assist ECU does not receive data from the television camera assembly for approximately 11 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1000*	CAN Communication Failure(Message Registry)	The parking assist ECU does not send/receive data.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 3 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U1110	Lost Communication with Clearance Sonar Module	The parking assist ECU does not receive data from the clearance warning ECU assembly for approximately 11 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the parking assist ECU is 7.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 14 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(x) Clearance Warning ECU Assembly / Techstream Display "Advanced Parking Guidance/ICS/Intuitive P/A"

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Intuitive Parking Assist System and Intelligent Clearance Sonar System.
w/ Intuitive Parking Assist System:

Click here

w/ Intelligent Clearance Sonar System:

Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0073	Control Module Communication Bus "A" Off	Either of the following conditions is met: The clearance warning ECU assembly does not receive data from an ECU or sensor to which it sent data for approximately 2 seconds or more. The clearance warning ECU assembly does not send/receive data consecutively 10 times or more within 5 seconds.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	ICS OFF indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0100	Lost Communication with ECM/PCM "A"	The clearance warning ECU assembly does not receive data from the ECM for approximately 6 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 9 seconds.	ICS OFF indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0124	Lost Communication with Lateral Acceleration Sensor Module	The clearance warning ECU assembly does not receive data from the airbag ECU assembly for approximately 1 second or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	ICS OFF indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication With Steering Angle Sensor Module	The clearance warning ECU assembly does not receive data from the steering sensor for approximately 6 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 9 seconds.	ICS OFF indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The clearance warning ECU assembly does not receive data from the brake actuator assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	ICS OFF indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0140	Lost Communication with Body Control Module	The clearance warning ECU assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	ICS OFF indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication With Instrument Panel Cluster (IPC) Control Module	The clearance warning ECU assembly does not receive data from the combination meter assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	ICS OFF indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0164	Lost Communication with HVAC Control Module	The clearance warning ECU assembly does not receive data from the air conditioning amplifier assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0232*	Lost Communication with Blind Spot Monitor Slave Module	The clearance warning ECU assembly does not receive data from the blind spot monitor sensor LH for approximately 1 second or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	-	-	DTC remains stored only while malfunction is occurring.
U0233*	Lost Communication with Blind Spot Monitor Master Module	The clearance warning ECU assembly does not receive data from the blind spot monitor sensor RH for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	-	-	DTC remains stored only while malfunction is occurring.
U1000*	CAN Communication Failure(Message Registry)	CAN communication malfunction (message register)	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the clearance warning ECU assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 3 seconds.	ICS OFF indicator light blinks.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(y) Driving Support ECU Assembly / Techstream Display "Radar Cruise2"

Powertrain > Radar Cruise2 > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Dynamic Radar Cruise Control System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The driving support ECU assembly does not receive data from the ECM for approximately 1 second or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The cruise control main switch is on. The power source voltage of the driving support ECU assembly is 10 V or more. Vehicle speed is 5 km/h (3 mph) or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 2 seconds or more.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0125	Lost Communication with Yaw Rate Sensor Module	The driving support ECU assembly does not receive data from the airbag ECU assembly for approximately 1 second or more.	All conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The cruise control main switch is on. The power source voltage of the driving support ECU assembly is 10 V or more. Vehicle speed is 5 km/h (3 mph) or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 4 seconds or more.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The driving support ECU assembly does not receive data from the steering sensor for approximately 6 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The cruise control main switch is on. The power source voltage of the driving support ECU assembly is 10 V or more. Vehicle speed is 5 km/h (3 mph) or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 7 seconds or more.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The driving support ECU assembly does not receive data from the brake actuator assembly for approximately 2 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 2 seconds or more. The cruise control main switch is on. The power source voltage of the driving support ECU assembly is 10 V or more. Vehicle speed is 5 km/h (3 mph) or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 4 seconds or more.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0235*	Lost Communication with Cruise Control Front Distance Range Sensor	The driving support ECU assembly does not receive data from the millimeter wave radar sensor assembly for approximately 2 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The cruise control main switch is on. The power source voltage of the driving support ECU assembly is 10 V or more. Vehicle speed is 5 km/h (3 mph) or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 3 seconds or more.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1104*	Lost Communication with Driving Support ECU	The millimeter wave radar sensor assembly does not receive data from the driving support ECU assembly for approximately 1 second or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The cruise control main switch is on. The power source voltage of the driving support ECU assembly is 10 V or more. Vehicle speed is 5 km/h (3 mph) or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 2 seconds or more.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(z) Driving Support ECU Assembly / Techstream Display "Pre-Collision 2"

Body Electrical > Pre-Collision 2 > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Pre-Collision System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The driving support ECU assembly does not receive data from the ECM for approximately 6 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. Vehicle speed is 5 km/h (3 mph) or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 9 seconds or more.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0125	Lost Communication with Yaw Rate Sensor Module	The driving support ECU assembly does not receive data from the airbag ECU assembly for approximately 1 second or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The driving support ECU assembly does not receive data from the steering sensor for approximately 6 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 9 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The driving support ECU assembly does not receive data from the brake actuator assembly for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 8 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The driving support ECU assembly does not receive data from the combination meter assembly for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0235*	Lost Communication with Cruise Control Front Distance Range Sensor	The driving support ECU assembly does not receive data from the millimeter wave radar sensor assembly for approximately 2 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 5 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U023A*	Lost Communication with Image Processing Module "A"	The driving support ECU assembly does not receive data from the forward recognition camera for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1002*	Lost Communication with Gateway Module	The driving support ECU assembly does not receive data from the millimeter wave radar sensor assembly and forward recognition camera for approximately 1 second or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1104*	Lost Communication with Driving Support ECU	One of the following conditions is met: The millimeter wave radar sensor assembly does not receive data from the driving support ECU assembly for approximately 1 second or more. The forward recognition camera does not receive data from the driving support ECU assembly for approximately 1 second or more. The brake actuator assembly does not receive data from the driving support ECU assembly for approximately 2 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 2 seconds or more. The power source voltage of the driving support ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(aa) Multiplex Tilt and Telescopic ECU / Techstream Display "Tilt & Telescopic"

Body Electrical > Tilt&Telescopic > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U014287	Lost Communication with Body Control Module "B" Missing Message	The multiplex tilt and telescopic ECU does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	The power source voltage of the multiplex tilt and telescopic ECU is 11 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	The multiplex tilt and telescopic ECU does not receive data from the combination meter assembly for approximately 10 seconds or more.	The power source voltage of the multiplex tilt and telescopic ECU is 11 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U020887	Lost Communication with "Seat Control Module A" Missing Message	The multiplex tilt and telescopic ECU does not receive data from the position control ECU assembly LH for approximately 10 seconds or more.	The power source voltage of the multiplex tilt and telescopic ECU is 11 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(ab) Outer Mirror Control ECU Assembly LH / Techstream Display "Mirror L"

Body Electrical > Mirror L > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0142	Lost Communication With Body Control Module "B"	The outer mirror control ECU assembly LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	The power source voltage of the outer mirror control ECU assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(ac) Outer Mirror Control ECU Assembly RH / Techstream Display "Mirror R"

Body Electrical > Mirror R > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0142	Lost Communication With Body Control Module "B"	The outer mirror control ECU assembly RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	The power source voltage of the outer mirror control ECU assembly RH is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(ad) Stereo component equalizer assembly / Techstream Display "Active Noise Control"

Body Electrical > Active Noise Control > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U010087	Lost Communication with ECM/PCM "A" Missing Message	The stereo component equalizer assembly does not receive data from the ECM for approximately 1 second or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the stereo component equalizer assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U012987	Lost Communication with Brake System Control Module Missing Message	The stereo component equalizer assembly does not receive data from the brake actuator assembly for approximately 1 second or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the stereo component equalizer assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U014087	Lost Communication with Body Control Module Missing Message	The stereo component equalizer assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the stereo component equalizer assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(ae) Absorber Control ECU / Techstream Display "Air suspension"

Chassis > Air suspension > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The absorber control ECU does not receive data from the ECM for approximately 3 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. Vehicle speed is 30 km/h (19 mph) or more. The power source voltage of the absorber control ECU is 10 V or more.	Drive the vehicle at a speed of 30 km/h (19 mph) or more for approximately 4 seconds or more.	-	-	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The absorber control ECU does not receive data from the ECM for approximately 6 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. Vehicle speed is 30 km/h (19 mph) or more. The power source voltage of the absorber control ECU is 10 V or more.	Drive the vehicle at a speed of 30 km/h (19 mph) or more for approximately 7 seconds or more.	-	-	DTC is stored until it is cleared using the Techstream.
U0122	Lost Communication with Vehicle Dynamics Control Module	The absorber control ECU does not receive data from the brake actuator assembly for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 2 seconds or more. The power source voltage of the absorber control ECU is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 5 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0124	Lost Communication with Lateral Acceleration Sensor Module	The absorber control ECU does not receive data from the airbag ECU assembly for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 1 second or more. The power source voltage of the absorber control ECU is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The absorber control ECU does not receive data from the steering sensor for approximately 3 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 1 second or more. The power source voltage of the absorber control ECU is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 4 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(af) Headlight ECU Sub-assembly LH / Techstream Display "HL AutoLeveling"

Body Electrical > HL AutoLeveling > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Lighting System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0073	Control Module Communication Bus Off	The headlight ECU sub-assembly LH does not send/receive data.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 3 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0100	Lost Communication with ECM/PCM "A"	The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 13 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0101	Lost Communication with TCM	The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 13 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The headlight ECU sub-assembly LH does not receive data from the steering sensor for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 13 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The headlight ECU sub-assembly LH does not receive data from the brake actuator assembly for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 13 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The headlight ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 13 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The headlight ECU sub-assembly LH does not receive data from the combination meter assembly for approximately 30 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 33 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0242	Lost Communication With Headlamp Control Module "B"	The headlight ECU sub-assembly LH does not receive data from the headlight ECU sub-assembly RH for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 13 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U1000*	CAN Communication Failure(Message Registry)	CAN communication malfunction (message register)	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 3 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(ag) Headlight ECU Sub-assembly RH / Techstream Display "HL AutoLeveling (Sub)"

Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Lighting System.
Click here

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0073	Control Module Communication Bus Off	The headlight ECU sub-assembly RH does not send/receive data.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 3 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The headlight ECU sub-assembly RH does not receive data from the steering sensor for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 13 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0142	Lost Communication with Body Control Module "B"	The headlight ECU sub-assembly RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 13 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The headlight ECU sub-assembly RH does not receive data from the combination meter assembly for approximately 30 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 33 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U0182	Lost Communication With Lighting Control Module Front	The headlight ECU sub-assembly RH does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 13 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U1000*	CAN Communication Failure (Message Registry)	CAN communication malfunction (message register)	Both conditions are met: The engine switch is on (IG) for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.	Turn the engine switch on (IG) and wait for at least approximately 3 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(ah) 4WD ECU Assembly / Techstream Display "Four Wheel Drive" (for AWD)

Chassis > Four Wheel Drive > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.

DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Displayed		DTC Storage Method
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Indication in Meter	Multi-information Display	DTC Storage Method
U0073	Control Module Communication Bus OFF	The 4WD ECU assembly does not send/receive data for approximately 5 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 1 second or more. The power source voltage of the 4WD ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 6 seconds.	4WD warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.
U0100	Lost Communication with ECM / PCM "A"	The 4WD ECU assembly does not receive data from the ECM for approximately 4 seconds or more.	All conditions are met: The engine switch is on (IG) for approximately 1 second or more. The power source voltage of the 4WD ECU assembly is 10 V or more. The vehicle speed is 60 km/h (37 mph) or more.	Drive the vehicle at a speed of 60 km/h (37 mph) or more for approximately 5 seconds or more.	4WD warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.
U0126	Lost Communication with Steering Angle Sensor Module	The 4WD ECU assembly does not receive data from the steering sensor for approximately 1 second or more.	Both conditions are met: The engine switch is on (IG) for approximately 1 second or more. The power source voltage of the 4WD ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 2 seconds.	4WD warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The 4WD ECU assembly does not receive data from the brake actuator assembly for approximately 8 seconds or more.	Both conditions are met: The engine switch is on (IG) for approximately 2 seconds or more. The power source voltage of the 4WD ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait for at least approximately 10 seconds.	4WD warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.

(ai) Steering Sensor / Techstream Display "Steering Angle Sensor"

HINT:

The steering sensor is connected to the CAN communication system, but the steering sensor does not store or output CAN communication DTCs.

(aj) Central Gateway ECU (Network Gateway ECU) / Techstream Display "Central Gateway"

HINT:

The central gateway ECU (network gateway ECU) is connected to the CAN communication system, but the central gateway ECU (network gateway ECU) does not store or output CAN communication DTCs.

(ak) Position Control ECU Assembly LH / Techstream Display "Driver Seat"

HINT:

The position control ECU assembly LH is connected to the CAN communication system, but the position control ECU assembly LH does not store or output CAN communication DTCs.

(al) Millimeter Wave Radar Sensor Assembly / Techstream Display "-"

HINT:

The millimeter wave radar sensor assembly is connected to the CAN communication system, but the millimeter wave radar sensor assembly does not store or output CAN communication DTCs.

CAN BUS WAVEFORMS

HINT:

The following waveforms are measured between terminals CANH and GND, and terminals CANL and GND of the central gateway ECU (network gateway ECU). (Use this as a reference for diagnosis of CAN communication lines.)
When malfunctions in multiple ECUs are suspected based on the CAN bus check and DTCs checked using the Techstream, check the resistance of the CAN bus using an ohmmeter first. If no problems are found, check the following waveforms.
Click here
If a waveform is not similar to one of the following 3 patterns (Group 1), then an open in a CAN main bus line, an open in a CAN branch line, or a short between a CAN line (CANH or CANL) and ground is suspected (Group 2).
Wiggle the connector and wire harness to check if the waveform changes.

(a) CAN bus waveforms (Group 1)

(1) Normal waveform

(2) Open in both of the lines (CANH and CANL) of a CAN branch

HINT:

Waveforms (waveforms shown using dotted lines) are not present from an ECU or sensor connected to a CAN branch with an open circuit in both lines. (Waveforms from other ECUs or sensors are normal.)
Because this waveform is similar to a normal waveform, instead of using the waveform, the malfunctioning part can be narrowed down by performing a CAN bus check.

(3) Short between the CAN bus lines (CANH and CANL)

HINT:

Waveforms disappear.
If the malfunction is in an ECU, disconnecting the ECU will change the waveform. If the waveform does not change, a malfunction in the wire harness is suspected.

(b) CAN bus waveforms (reference) (Group 2)

NOTICE:

The following CAN bus waveforms can be used only as reference. The actual measured waveform may differ significantly depending on the location of the open or short circuit.

(1) Open in a CAN branch line (CANH)

HINT:

An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.
Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

(2) Open in a CAN branch line (CANL)

HINT:

An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.
Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

(3) Open in a CAN main bus line (CANH)

HINT:

Waveforms of ECUs or sensors that are closer to the central gateway ECU (network gateway ECU) than the open part are almost normal.
Waveforms of ECUs or sensors that are on the opposite side of the central gateway ECU (network gateway ECU) from the open part are abnormal.
An open in a CAN main bus line can be confirmed by measuring the resistance between the CANH and CANL terminals of any CAN branch.

(4) Short between a CAN bus line (CANH) and ground

HINT:

Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.
A short to ground in the CANH line can be confirmed by measuring the resistance between CANH and ground using an ohmmeter.

(5) Short between a CAN bus line (CANL) and ground

HINT:

Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.
A short to ground in the CANL line can be confirmed by measuring the resistance between CANL and ground using an ohmmeter.

DATA SENDING/RECEIVING TABLE

(a) Data sending/receiving table

HINT:

If Data List items related to sent/received data are not displayed properly, the part for which communication is interrupted can be determined using the table below.

Data Content	Data Detected and Sent by	Data Received by		Relevant Data List Item
Data Content	Data Detected and Sent by	Can be Checked in the Data List	Cannot be Checked in the Data List	Selected System*5	Data List Items
Accelerator position	ECM	Brake actuator assembly Driving support ECU assembly	Clearance warning ECU assembly Forward recognition camera Radio and display receiver assembly Stereo component equalizer assembly 4WD ECU assembly	Engine	Accelerator Position
				ABS/VSC/TRAC/EPB	Accelerator Opening Angle %
				Radar Cruise2	Vehicle Acceleration
Engine speed	ECM	Brake actuator assembly Certification ECU (smart key ECU assembly) Combination meter assembly Rack and pinion power steering gear assembly Absorber control ECU	Air conditioning amplifier assembly Main body ECU (multiplex network body ECU) Airbag ECU assembly Clearance warning ECU assembly Driving support ECU assembly Stereo component equalizer assembly Radio and display receiver assembly DCM (telematics transceiver) 4WD ECU assembly	Engine	Engine Speed
				Starting Control	Engine Speed
				Combination Meter	Engine RPM
				EMPS	Engine Revolution
				Air suspension	Engine Speed
				ABS/VSC/TRAC/EPB	Engine Revolutions
Engine coolant temperature	ECM	Combination meter assembly Air conditioning amplifier assembly	Radio and display receiver assembly	Engine	Coolant Temperature
				Combination Meter	Coolant Temperature
				Air Conditioner	Engine Coolant Temp
Vehicle speed	Brake actuator assembly	Combination meter assembly Rack and pinion power steering gear assembly Occupant detection ECU Driving support ECU assembly Radio and display receiver assembly ECM Meter mirror sub-assembly	Main body ECU (multiplex network body ECU) Airbag ECU assembly Television camera assembly*4 Clearance warning ECU assembly Forward recognition camera Parking assist ECU DCM (telematics transceiver) Stereo component equalizer assembly	ABS/VSC/TRAC/EPB	Vehicle Speed
				EMPS	Meter Vehicle Velocity
				Combination Meter	Vehicle Speed Meter
				Occupant Detection	VSC Vehicle Speed
				Navigation System	Vehicle Speed
				Engine	Vehicle Speed
				Radar Cruise2	Vhcl Spd-Brake ECU
				Head Up Display	Vehicle Speed Meter
	Combination meter assembly*3	Position control ECU assembly LH Multiplex tilt and telescopic ECU Tire pressure warning ECU and receiver	Air conditioning amplifier assembly Main body ECU (multiplex network body ECU) Certification ECU (smart key ECU assembly) DCM (telematics transceiver)	Combination Meter	Vehicle Speed Meter
				Driver Seat	Vehicle Speed
				Tilt & Telescopic	Vehicle Speed
				Tire Pressure Monitor	Vehicle Speed
Wheel speed	Brake actuator assembly	Headlight ECU sub-assembly LH Absorber control ECU Rack and pinion power steering gear assembly 4WD ECU assembly	Airbag ECU assembly Blind spot monitor sensor RH Television camera assembly*4 Forward recognition camera Driving support ECU assembly Radio and display receiver assembly ECM Clearance warning ECU assembly Stereo component equalizer assembly	ABS/VSC/TRAC/EPB	FL Wheel Speed
				HL AutoLeveling	Front Left Wheel Speed Value
				Air suspension	FL Wheel Speed
				EMPS	Wheel Speed Left
				Four Wheel Drive	FR Wheel Speed
					FL Wheel Speed
					RR Wheel Speed
					RL Wheel Speed
Stop light switch signal	Brake actuator assembly	Certification ECU (smart key ECU assembly) Absorber control ECU	Airbag ECU assembly Rack and pinion power steering gear assembly Clearance warning ECU assembly Radio and display receiver assembly DCM (telematics transceiver) Driving support ECU assembly	ABS/VSC/TRAC/EPB	Stop Light SW
				Power Source Control	Stop Light Switch1
				Air suspension	Stop Light Switch
Shift position	ECM	Blind spot monitor sensor RH Certification ECU (smart key ECU assembly) Radio and display receiver assembly Parking assist ECU Position control ECU assembly LH Clearance warning ECU assembly	Main body ECU (multiplex network body ECU) Combination meter assembly*2 Airbag ECU assembly Tire pressure warning ECU and receiver Television camera assembly Forward recognition camera Driving support ECU assembly DCM (telematics transceiver) Headlight ECU sub-assembly LH Meter mirror sub-assembly	Engine	Shift SW Status (P Range)
				Blind Spot Monitor Master	Reverse (Only for AT/CVT)
				Power Source Control	Shift P Signal
				Navigation System	Reverse Signal
				Panoramic View Monitor	Shift R Position
				Driver Seat	Shift SW Position
				Advanced Parking Guidance/ICS/Intuitive P/A	Parking Signal
Ambient temperature	Air conditioning amplifier assembly	Combination meter assembly ECM Meter mirror sub-assembly	Main body ECU (multiplex network body ECU) Rack and pinion power steering gear assembly Forward recognition camera Radio and display receiver assembly DCM (telematics transceiver) Driving support ECU assembly Clearance warning ECU assembly Brake actuator assembly	Air Conditioner	Ambient Temp Sensor
				Combination Meter	Ambient Temperature (Celsius)
				Engine	Ambient Temperature
				Head Up Display	Ambient Temperature (Celsius)
Driver door courtesy switch	Main body ECU (multiplex network body ECU)	-	Certification ECU (smart key ECU assembly) Combination meter assembly*2 Radio and display receiver assembly DCM (telematics transceiver) Forward recognition camera ECM Parking assist ECU Brake actuator assembly Stereo component equalizer assembly	Main Body	FL Door Courtesy SW
Steering angle	Steering sensor	Blind spot monitor sensor RH Rack and pinion power steering gear assembly Brake actuator assembly Absorber control ECU Headlight ECU sub-assembly LH Driving support ECU assembly 4WD ECU assembly	Main body ECU (multiplex network body ECU) Airbag ECU assembly Television camera assembly Forward recognition camera Radio and display receiver assembly ECM Parking assist ECU Clearance warning ECU assembly	Blind Spot Monitor Master	Steering Angle
				EMPS	Steering Angle Velocity
				ABS/VSC/TRAC/EPB	Steering Angle Sensor
				Air suspension	Steering Angle
				HL AutoLeveling	Steering Sensor Signal
				Radar Cruise2	Steering Angle
				Four Wheel Drive	Steering Angle Value
Yaw rate	Airbag ECU assembly	Brake actuator assembly Blind spot monitor sensor RH Driving support ECU assembly	Rack and pinion power steering gear assembly Forward recognition camera Radio and display receiver assembly	ABS/VSC/TRAC/EPB	Yaw Rate Sensor
				Blind Spot Monitor Master	Yaw Rate Sensor
				Radar Cruise2	Yaw Rate Sensor
Acceleration	Airbag ECU assembly	Brake actuator assembly Occupant detection ECU	Rack and pinion power steering gear assembly Forward recognition camera Driving support ECU assembly Radio and display receiver assembly ECM Clearance warning ECU assembly Absorber control ECU	ABS/VSC/TRAC/EPB	Deceleration Sensor
Acceleration	Airbag ECU assembly	Brake actuator assembly Occupant detection ECU		Occupant Detection	Yaw Rate/G Sensor Invalid Flag1
Engine switch condition	Main body ECU (multiplex network body ECU)	Position control ECU assembly LH Radio and display receiver assembly Certification ECU (smart key ECU assembly) Multiplex tilt and telescopic ECU	Television camera assembly DCM (telematics transceiver) Meter mirror sub-assembly Outer mirror control ECU assembly LH Outer mirror control ECU assembly RH Headlight ECU sub-assembly LH Headlight ECU sub-assembly RH	Main Body	IG SW
				Driver Seat	Ignition Switch
				Tilt & Telescopic	Ignition Switch (CAN)
				Power Source Control	Power Supply Condition
				Navigation System	Ignition
Side turn signal	Combination meter assembly	Blind spot monitor sensor RH Forward recognition camera Driving support ECU assembly	Main body ECU (multiplex network body ECU) Radio and display receiver assembly Headlight ECU sub-assembly LH Headlight ECU sub-assembly RH	Combination Meter	Turn Signal Switch (Left)
				Blind Spot Monitor Master	Turn Switch State
				LKA/LDA	Turn Signal Switch (Left)
				Pre-Collision 2	Turn Light LH
ECM power source voltage*1	ECM	-	-	Engine	Battery Voltage
Combination meter assembly power source voltage*1	Combination meter assembly	-	-	Combination Meter	+B Voltage
Rack and pinion power steering gear assembly power source voltage*1	Rack and pinion power steering gear assembly	-	-	EMPS	IG Power Supply
Driver door touch sensor*1	Certification ECU (smart key ECU assembly)	-	-	Smart Key	D-Door Touch Sensor
Blind spot monitor main switch condition*1	Blind spot monitor sensor RH	-	-	Blind Spot Monitor Master	Main Switch
Solar sensor*1	Air conditioning amplifier assembly	-	-	Air Conditioner	Solar Sensor (D Side)
Radio and display receiver assembly power source voltage*1	Radio and display receiver assembly	-	-	Navigation System	Battery Voltage
Driver side buckle switch signal*1	Airbag ECU assembly	-	-	SRS Airbag	Left side Buckle SW
Panoramic view monitor main switch condition*1	Parking assist ECU	-	-	Panoramic View Monitor	Camera Changing SW Signal Status
Meter mirror sub-assembly power source voltage*1	Meter mirror sub-assembly	-	-	Head Up Display	+B Voltage
Brake actuator assembly power source voltage*1	Brake actuator assembly	-	-	ABS/VSC/TRAC/EPB	IG1 Voltage Value

*1: Whether the ECU that sends data is functioning or not can be judged by using the Techstream to check items such as switches or sensors that send signals to the ECU via direct lines.
*2: Although the received contents cannot be checked in the Data List, whether or not the data is received normally can be checked by observing the combination meter assembly.
*3: The combination meter assembly receives a vehicle speed signal from the brake actuator assembly and sends the signal to other ECUs.
*4: w/ Panoramic View Monitor System
*5: According to the display on the Techstream, read the Data List.
- Enter the following menus: Powertrain / Engine / Data List.
  for 2GR-FKS:Click here
  
  for A25A-FKS:Click here
- Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Data List.
  Click here
- Enter the following menus: Chassis / EMPS / Data List.
  Click here
- Enter the following menus: Chassis / Air suspension / Data List.
  Click here
- Enter the following menus: Body Electrical / Combination Meter / Data List.
  Click here
- Enter the following menus: Body Electrical / Air Conditioner / Data List.
  Click here
- Enter the following menus: Body Electrical / Navigation System / Data List.
  for Audio and Visual System: Click here
  
  for Navigation System: Click here
- Enter the following menus: Body Electrical / Blind Spot Monitor Master / Data List.
  Click here
- Enter the following menus: Body Electrical / Power Source Control / Data List.
  Click here
- Enter the following menus: Body Electrical / Starting Control / Data List.
  Click here
- Enter the following menus: Body Electrical / Main Body / Data List.
  Click here
- Enter the following menus: Chassis / LKA/LDA / Data List.
  Click here
- Enter the following menus: Body Electrical / Occupant Detection / Data List.
  Click here
- Enter the following menus: Powertrain / Radar Cruise2 / Data List.
  Click here
- Enter the following menus: Body Electrical / SRS Airbag / Data List.
  Click here
- Enter the following menus: Body Electrical / Smart Key / Trouble Codes.
  Click here
- Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
  Click here
- Enter the following menus: Powertrain / Advanced Parking Guidance/ICS/Intuitive P/A / Data List.
  Click here
- Enter the following menus: Powertrain / Panoramic View Monitor / Data List.
  Click here
- Enter the following menus: Powertrain / Head Up Display / Data List.
  Click here
- Enter the following menus: Body Electrical / HL AutoLeveling / Data List.
  Click here
- Enter the following menus: Body Electrical / Driver Seat / Data List.
  Click here
- Enter the following menus: Body Electrical / Tilt & Telescopic / Data List.
  Click here
- Enter the following menus: Chassis / Four Wheel Drive / Data List
  Click here