NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM; 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001KH1H
Model Year Start: 2020	Model: GR Corolla	Prod Date Range: [09/2019 - 04/2020]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM; 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020]

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	Vehicles with Toyota Safety Sense
	F-MR	Millimeter wave radar sensor assembly	Front Radar	Vehicles with Toyota Safety Sense
	BSM	Blind spot monitor sensor LH	Blind Spot Monitor Master	Vehicles with Blind Spot Monitor System
Bus 2	ENG	ECM	ECM (Engine)	Installed on all vehicles
Bus 2	TCM	Transmission control ECU	TCM	for CVT (K120)
Bus 3	AV	Radio and display receiver assembly	Display and Navigation (AVN)	Installed on all vehicles
Bus 3	DCM	DCM (Telematics Transceiver)	DCM	Vehicles with Telematics Transceiver
Bus 4	EPS	Power steering ECU with motor assembly	Power Steering (EPS)	Installed on all vehicles
	BRK	Brake actuator assembly	Skid Control (ABS/VSC/TRAC)	Installed on all vehicles
	STR	Steering sensor	Spiral cable (Steering Angle Sensor)	Installed on all vehicles
	SRS	Airbag sensor assembly	Airbag	Installed on all vehicles
	OCS	Occupant detection ECU	Occupant Detection	Installed on all vehicles
Bus 5	A/C	Air conditioning amplifier assembly	Air Conditioning Amplifier	Installed on all vehicles
	MB	Main body ECU (multiplex network body ECU)	Main Body	Installed on all vehicles
	SMT	Certification ECU (smart key ECU assembly)	Certification (Smart)	Vehicles with Smart Key System
	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 AFS
	LITS	Headlight ECU sub-assembly RH	HL AutoLeveling/AFS/AHS(Sub)	Vehicles with AFS
	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 ignition switch to ON, 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 M20A-FKS Engine) / 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 transmission control ECU for approximately 2 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 1 second or more. The power source voltage of the ECM is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 4 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 ignition switch is ON for approximately 2 seconds or more. The power source voltage of the ECM is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the ECM is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 6 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.

(b) ECM (for 2ZR-FAE) / Techstream Display "Engine and ECT"

Powertrain > Engine and ECT > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to SFI System (for 2ZR-FAE)
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
U011B*	Lost Communication with Rocker Arm Control Module "A"	The ECM does not receive data from the continuously variable valve lift controller assembly for approximately 1 second or more.	Both conditions are met: The ignition switch is ON for approximately 1 second or more. The power source voltage of the ECM is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 2 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.
U0124	Lost Communication with Lateral Acceleration Sensor Module	The ECM does not receive data from the airbag sensor assembly for approximately 1 second or more.	Both conditions are met: The ignition switch is ON for approximately 1 second or more. The power source voltage of the ECM is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 2 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.
U0129	Lost Communication with Brake System Control Module	The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 1 second or more. The power source voltage of the ECM is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 6 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.
U0155	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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the ECM is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 6 seconds.	-	-	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 K120 Continuously Variable Transaxle 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
U010087*	Lost Communication with ECM/PCM "A" Missing Message	The transmission control ECU does not receive data from the ECM for approximately 2 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 1 second or more. The power source voltage of the transmission control ECU is 10.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 4 seconds.	MIL illuminates.	-	DTC is stored until it is cleared using the Techstream.
U012587	Lost Communication with Multi-Axis Acceleration Sensor Module Missing Message	The transmission control ECU does not receive data from the airbag sensor assembly for approximately 1 second or more.	Both conditions are met: The ignition switch is ON for approximately 1 second or more. The power source voltage of the transmission control ECU is 10.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 3 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U012987	Lost Communication with Brake System Control Module Missing Message	The transmission control ECU does not receive data from the brake actuator assembly for approximately 3 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 2 seconds or more. The power source voltage of the transmission control ECU is 10.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 6 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(d) ECM (for M20A-FKS Engine) / Techstream Display "Cruise Control"

Powertrain > Cruise 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
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 ignition switch is ON 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 ignition switch to ON, 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.

(e) ECM (for M20A-FKS Engine) / Techstream Display "Radar Cruise 1"

Powertrain > Cruise 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 brake actuator assembly does not receive data from the ECM for approximately 1 second or more.	All conditions are met: The ignition switch is ON 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 ignition switch to ON, turn the cruise control main switch on and wait for at least approximately 2 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U010487	Lost Communication with Cruise Control Module Missing Message	The ECM does not receive data from the forward recognition camera for approximately 2 seconds or more.	All conditions are met: The ignition switch is ON 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 ignition switch to ON, 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.
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 ignition switch is ON 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 ignition switch to ON, 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.

(f) ECM (for 2ZR-FAE Engine) / Techstream Display "Cruise Control"

Powertrain > Cruise 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
U0122	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 ignition switch is ON 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 ignition switch to ON, 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.

(g) ECM (for 2ZR-FAE Engine) / Techstream Display "Radar Cruise 1"

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
U0100	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 ignition switch is ON 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 ignition switch to ON, turn the cruise control main switch on and wait for at least approximately 2 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U0104	Lost Communication with Cruise Control Module Missing Message	The ECM does not receive data from the forward recognition camera for approximately 2 seconds or more.	All conditions are met: The ignition switch is ON 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 ignition switch to ON, 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.
U0122	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 ignition switch is ON 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 ignition switch to ON, 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.

(h) Brake Actuator Assembly / Techstream Display "Brake"

Chassis > Brake/EPB > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*1: w/ K120 Continuously Variable Transaxle
*2: except K120 Continuously Variable Transaxle

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
U007488	Control Module Communication Bus "B" Off Bus Off	Bus off is judged.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.	Turn the ignition switch to ON 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.
U010087	Lost Communication with ECM/PCM "A" Missing Message	The brake actuator assembly does not receive data from the ECM for approximately 10 seconds or more.	All conditions are met: The ignition switch is ON for approximately 2 seconds or more. Vehicle speed is 15 km/h (9 mph) or more. The power source voltage of the brake actuator assembly is 10 V or more.	Drive the vehicle at a speed of 15 km/h (9 mph) or more for approximately 12 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.
U010187	Lost Communication with TCM Missing Message	The brake actuator assembly does not receive data from the transmission control ECU for approximately 2 seconds or more.1 The brake actuator assembly does not receive data from the ECM for approximately 2 seconds or more.2	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 6 km/h (4 mph) or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.	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.
U012587	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	The brake actuator assembly does not receive data from the airbag sensor assembly for approximately 1 second or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 6 km/h (4 mph) or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.	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.
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	The brake actuator assembly does not receive data from the steering sensor for approximately 1 second or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 6 km/h (4 mph) or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.	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.
U013187	Lost Communication with Power Steering Control Module Missing Message	The brake actuator assembly does not receive data from the power steering ECU with motor assembly for approximately 1 second or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 6 km/h (4 mph) or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.	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.
U014087	Lost Communication with Body Control Module Missing Message	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 ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 6 km/h (4 mph) or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.	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.
U015187	Lost Communication with Restraints Control Module Missing Message	The brake actuator assembly does not receive data from the airbag sensor assembly for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 6 km/h (4 mph) or more. The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.	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.

(i) Power Steering ECU with Motor 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
U010087	Lost Communication with ECM/PCM "A" Missing Message	The power steering ECU with motor assembly does not receive data from the ECM for approximately 300 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 20 km/h (12 mph) or more. The power source voltage of the power steering ECU with motor assembly is 9 V or more.	Drive the vehicle at a speed of 20 km/h (12 mph) or more for approximately 300 seconds or more.	-	-	DTC remains stored only while malfunction is occurring.
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	The power steering ECU with motor assembly does not receive data from the steering sensor for approximately 3 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the power steering ECU with motor assembly is 9 V or more.	Turn the ignition switch to ON and wait for at least approximately 6 seconds.	EPS warning light illuminates.	-	DTC remains stored only while malfunction is occurring.
U012987	Lost Communication with Brake System Control Module Missing Message	The power steering ECU with motor assembly does not receive data from the brake actuator assembly for approximately 3 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the power steering ECU with motor assembly is 9 V or more.	Turn the ignition switch to ON and wait for at least approximately 6 seconds.	EPS warning light illuminates.	-	DTC remains stored only while malfunction is occurring.
U023A87	Lost Communication with Image Processing Module "A" Missing Message	The power steering ECU with motor assembly does not receive data from the forward recognition camera for approximately 2 seconds or more.	The ignition switch is ON for approximately 3 seconds or more.	Turn the ignition switch to ON and wait for at least approximately 5 seconds.	-	-	DTC remains stored only while malfunction is occurring.

(j) 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.
*1: w/ K120 Continuously Variable Transaxle
*2: except K120 Continuously Variable Transaxle

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 ignition switch is ON 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 ignition switch to ON 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 transmission control ECU for approximately 10 seconds or more.1 The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.2	Both conditions are met: The ignition switch is ON 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 ignition switch to ON 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 ignition switch to ON 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 ignition switch to ON 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 ignition switch is ON 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 ignition switch to ON 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 sensor assembly for approximately 10 seconds or more.	Both conditions are met: The ignition switch is ON 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 ignition switch to ON 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 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 ignition switch to ON 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 ignition switch to ON 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 ignition switch is ON 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 ignition switch to ON 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 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 ignition switch to ON 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 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 ignition switch to ON and wait for at least approximately 20 seconds.	Automatic high beam indicator (yellow) illuminates.	-	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 ignition switch to ON 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.	Both conditions are met: The ignition switch is ON 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 ignition switch to ON 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 "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 ignition switch to ON 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 certification ECU (smart key ECU assembly) does not receive data from the brake actuator 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 ignition switch to ON 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 ignition switch to ON 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 ignition switch to ON and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(l) 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
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 ignition switch is ON. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 4 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(m) 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 ignition switch to ON and wait for at least approximately 7 seconds.	MIL illuminates.	-	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 ignition switch to ON and wait for at least approximately 7 seconds.	Brake warning light / red (malfunction) illuminates. Slip indicator light illuminates. ABS warning light 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 power steering ECU with motor 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 ignition switch to ON and wait for at least approximately 7 seconds.	EPS warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.
U014087	Lost Communication with Body Control Module 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 ignition switch to ON 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 sensor 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 ignition switch to ON and wait for at least approximately 8 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 and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the ignition switch to ON 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 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 ignition switch to ON and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U016887	Lost Communication 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 ignition switch to ON 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 ignition switch to ON 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 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 ignition switch to ON 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 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 and approximately 3 seconds or more elapse. The power source voltage of the combination meter assembly is 10.5 V or more.	Turn the ignition switch to ON 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 ignition switch to ON 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 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 ignition switch to ON and wait for at least approximately 7 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(n) 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 7 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U014087	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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the meter mirror sub-assembly is 10.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(o) 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 ignition switch is ON. The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the ignition switch to ON 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 power steering ECU with motor assembly for approximately 10 seconds or more.	Both conditions are met: The ignition switch is ON. The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON. The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the ignition switch to ON 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 sensor assembly for approximately 10 seconds or more.	Both conditions are met: The ignition switch is ON. The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON. The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 10 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(p) Millimeter Wave Radar Sensor Assembly / Techstream Display "Front Radar Sensor"

Body Electrical > Front Radar Sensor > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Front Radar Sensor 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
U010487*	Lost Communication with Cruise Control Module Missing Message	The millimeter wave radar sensor assembly does not receive data from the forward recognition camera for approximately 1 second or more.	Both conditions are met: The ignition switch is ON for approximately 1 second or more. The power source voltage of the millimeter wave radar sensor assembly is 8 V or more.	Turn the ignition switch to ON and wait for at least approximately 2 seconds.	PCS warning light illuminates. Automatic high beam indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U030557*	Software Incompatibility with Cruise Control Module Invalid / Incompatible Software Component	The control system information sent from the forward recognition camera does not match that stored in the millimeter wave radar sensor assembly for 7 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 1 second or more. The power source voltage of the millimeter wave radar sensor assembly is 8 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	PCS warning light illuminates. Automatic high beam indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(q) Forward Recognition Camera / Techstream Display "Pre-Collision System"

Body Electrical > Pre-Collision System > 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
U010087	Lost Communication with ECM/PCM "A" Missing Message	The forward recognition camera does not receive data from the ECM for approximately 3 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 5 km/h (3 mph) or more. The power source voltage of the forward recognition camera is 10 V or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 6 seconds or more.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U012587	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	The forward recognition camera does not receive data from the airbag sensor assembly for approximately 1 second or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 5 km/h (3 mph) or more. The power source voltage of the forward recognition camera is 10 V or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 4 seconds or more.	PCS warning light illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	The forward recognition camera does not receive data from the steering sensor for approximately 1 second or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON 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.
U012987	Lost Communication with Brake System Control Module Missing Message	The forward recognition camera does not receive data from the brake actuator assembly for approximately 1 second or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON 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.
U023587*	Lost Communication with Cruise Control Front Distance Range Sensor Single Sensor or Center Missing Message	The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for approximately 2 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON 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.
U023A87*	Lost Communication with Image Processing Module "A" Missing Message	The brake actuator assembly does not receive data from the forward recognition camera for approximately 3 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 2 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON 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.
U030051*	Internal Control Module Software Incompatibility Not Programmed	The vehicle information sent from ECM remains undefined by the forward recognition camera for 3 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON 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.
U030057*	Internal Control Module Software Incompatibility Invalid / Incompatible Software Component	The control system information sent from the ECM does not match that stored in the forward recognition camera for 1 second or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON 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.
U041881*	Invalid Data Received from Brake System Control Module Invalid Serial Data Received	The forward recognition camera receives an abnormal brake system control signal for 1 second or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON 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.

(r) Forward Recognition Camera / Techstream Display "Lane Control"

Chassis > Lane Control > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Lane 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
U010087	Lost Communication with ECM/PCM "A" Missing Message	The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 5 km/h (3 mph) or more. The LDA/LTA main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more with the LDA/LTA main switch on for approximately 8 seconds or more.	LDA/LTA indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U012587	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	The forward recognition camera does not receive data from the airbag sensor assembly for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 5 km/h (3 mph) or more. The LDA/LTA main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more with the LDA/LTA main switch on for approximately 8 seconds or more.	LDA/LTA indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	The forward recognition camera does not receive data from the steering sensor for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The LDA/LTA main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the LDA/LTA main switch on and wait for at least approximately 8 seconds.	LDA/LTA indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U012987	Lost Communication with Brake System Control Module Missing Message	The forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The LDA/LTA main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the LDA/LTA main switch on and wait for at least approximately 8 seconds.	LDA/LTA indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U013187	Lost Communication with Power Steering Control Module Missing Message	The forward recognition camera does not receive data from the power steering ECU with motor assembly for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The LDA/LTA main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the LDA/LTA main switch on and wait for at least approximately 8 seconds.	LDA/LTA indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	The forward recognition camera does not receive data from the combination meter assembly for approximately 50 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The LDA/LTA main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the LDA/LTA main switch on and wait for at least approximately 53 seconds.	LDA/LTA indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U023587*	Lost Communication with Cruise Control Front Distance Range Sensor Single Sensor or Center Missing Message	The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The LDA/LTA main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the LDA/LTA main switch on and wait for at least approximately 8 seconds.	LDA/LTA indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U030051*	Internal Control Module Software Incompatibility Not Programmed	The vehicle information sent from ECM remains undefined by the forward recognition camera.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The LDA/LTA main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the LDA/LTA main switch on and wait for at least approximately 3 seconds.	LDA/LTA indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U030057*	Internal Control Module Software Incompatibility Invalid / Incompatible Software Component	The control system information sent from the ECM does not match that stored in the forward recognition camera for 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The LDA/LTA main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the LDA/LTA main switch on and wait for at least approximately 8 seconds.	LDA/LTA indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(s) 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
U010087	Lost Communication with ECM/PCM "A" Missing Message	The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 1 km/h or 1 mph or more. The power source voltage of the forward recognition camera is 10 V or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 8 seconds or more.	-	-	DTC is stored until it is cleared using the Techstream.
U012587	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	The forward recognition camera does not receive data from the airbag sensor assembly for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 1 km/h or 1 mph or more. The power source voltage of the forward recognition camera is 10 V or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 8 seconds or more.	-	-	DTC is stored until it is cleared using the Techstream.
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	The forward recognition camera does not receive data from the steering sensor for approximately 5 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON 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 forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U014087	Lost Communication with Body Control Module Missing Message	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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U030051*	Internal Control Module Software Incompatibility Not Programmed	The vehicle information sent from ECM remains undefined by the forward recognition camera for 5 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U030057*	Internal Control Module Software Incompatibility Invalid / Incompatible Software Component	The control system information sent from the ECM does not match that stored in the forward recognition camera for 5 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U032251*	Software Incompatibility with Body Control Module Not Programmed	The vehicle information sent from main body ECU (multiplex network body ECU) remains undefined by the forward recognition camera for 5 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.
U032257*	Software Incompatibility with Body Control Module Invalid / Incompatible Software Component	The vehicle information sent from the main body ECU (multiplex network body ECU) does not match that stored in the forward recognition camera for 5 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(t) Forward Recognition Camera / Techstream Display "Road Sign Assist"

Body Electrical > Road Sign Assist > 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 forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 1 km/h or 1 mph or more. The power source voltage of the forward recognition camera is 9.5 V or more.	Drive the vehicle at a speed of 1 km/h or 1 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.
U012587	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	The forward recognition camera does not receive data from the airbag sensor assembly for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 1 km/h or 1 mph or more. The power source voltage of the forward recognition camera is 9.5 V or more.	Drive the vehicle at a speed of 1 km/h or 1 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.
U012987	Lost Communication with Brake System Control Module Missing Message	The forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 9.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U014087	Lost Communication with Body Control Module Missing Message	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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 9.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	The forward recognition camera does not receive data from the combination meter assembly for approximately 50 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the forward recognition camera is 9.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 53 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(u) Forward Recognition Camera / 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
U010087	Lost Communication with ECM/PCM "A" Missing Message	The forward recognition camera does not receive data from the ECM for approximately 1 second or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The cruise control main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, 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.
U012587	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	The forward recognition camera does not receive data from the airbag sensor assembly for approximately 1 second or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The cruise control main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, 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.
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	The forward recognition camera does not receive data from the steering sensor for approximately 1 second or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The cruise control main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, 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.
U012987	Lost Communication with Brake System Control Module Missing Message	The forward recognition camera does not receive data from the brake actuator assembly for approximately 2 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The cruise control main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the cruise control main switch on 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.
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	The forward recognition camera does not receive data from the combination meter assembly for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The cruise control main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the cruise control main switch on and wait for at least approximately 8 seconds.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U023587*	Lost Communication with Cruise Control Front Distance Range Sensor Single Sensor or Center Missing Message	The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for approximately 2 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The cruise control main switch is on.	Turn the ignition switch to ON, turn the cruise control main switch on 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.
U030051*	Internal Control Module Software Incompatibility Not Programmed	The vehicle information sent from ECM remains undefined by the forward recognition camera.	Both conditions are met: The ignition switch is ON. The cruise control main switch is on.	Turn the ignition switch to ON, turn the cruise control main switch on.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U030057*	Internal Control Module Software Incompatibility Invalid / Incompatible Software Component	The control system information sent from the ECM does not match that stored in the forward recognition camera.	Both conditions are met: The ignition switch is ON. The cruise control main switch is on.	Turn the ignition switch to ON, turn the cruise control main switch on.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U031851*	Software Incompatibility with Brake System Control Module Not Programmed	The vehicle information sent from brake actuator assembly remains undefined by the forward recognition camera.	Both conditions are met: The ignition switch is ON. The cruise control main switch is on.	Turn the ignition switch to ON, turn the cruise control main switch on.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U031857*	Software Incompatibility with Brake System Control Module Invalid / Incompatible Software Component	The control system information sent from the brake actuator assembly does not match that stored in the forward recognition camera.	Both conditions are met: The ignition switch is ON. The cruise control main switch is on.	Turn the ignition switch to ON, turn the cruise control main switch on.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U032251*	Software Incompatibility with Body Control Module Not Programmed	The vehicle information sent from main body ECU (multiplex network body ECU) remains undefined by the forward recognition camera.	Both conditions are met: The ignition switch is ON. The cruise control main switch is on.	Turn the ignition switch to ON, turn the cruise control main switch on.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U032257*	Software Incompatibility with Body Control Module Invalid / Incompatible Software Component	The vehicle information sent from the main body ECU (multiplex network body ECU) does not match that stored in the forward recognition camera.	Both conditions are met: The ignition switch is ON. The cruise control main switch is on.	Turn the ignition switch to ON, turn the cruise control main switch on.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U040181*	Invalid Data Received from ECM/PCM "A" Invalid Serial Data Received	The information sent from the ECM does not match that stored in the forward recognition camera.	Both conditions are met: The ignition switch is ON. The cruise control main switch is on.	Turn the ignition switch to ON, turn the cruise control main switch on.	-	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U110687	Lost Communication with Electric Parking Brake Module Missing Message	The forward recognition camera does not receive data from the brake actuator assembly for approximately 2 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. The cruise control main switch is on. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON, turn the cruise control main switch on 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.

(v) Forward Recognition Camera / Techstream Display "Front Recognition Camera (Front Lighting Control)"

Body Electrical > Front Recognition Camera (Front Lighting Control) > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Lighting System.
Click here (w/ AFS)

Click here (w/o AFS)

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 forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more. The power source voltage of the forward recognition camera is 10 V or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 7 seconds or more.	Automatic high beam indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U012587	Lost Communication with Multi-axis Acceleration Sensor Module Missing Message	The forward recognition camera does not receive data from the airbag sensor assembly for approximately 5 seconds or more.	All conditions are met: The ignition switch is ON for approximately 2 seconds or more. Vehicle speed is 1 km/h or 1 mph or more. The power source voltage of the forward recognition camera is 10 V or more.	Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 7 seconds or more.	Automatic high beam indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U012987	Lost Communication with Brake System Control Module Missing Message	The forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 2 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 7 seconds.	Automatic high beam indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U014087	Lost Communication with Body Control Module Missing Message	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 ignition switch is ON for approximately 2 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 7 seconds.	Automatic high beam indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.
U023587*	Lost Communication with Cruise Control Front Distance Range Sensor Single Sensor or Center Missing Message	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 ignition switch is ON for approximately 2 seconds or more. The power source voltage of the forward recognition camera is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 7 seconds.	Automatic high beam indicator (yellow) illuminates.	Displays messages on the multi-information display.	DTC is stored until it is cleared using the Techstream.

(w) Blind Spot Monitor Sensor LH / 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 LH does not receive data from the ECM for approximately 11 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 5 km/h (3 mph) or more. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 14 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 blind spot monitor sensor LH does not receive data from the airbag sensor assembly for approximately 4 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 7 km/h (4 mph) or more. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Drive the vehicle at a speed of 7 km/h (4 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.
U0126	Lost Communication with Steering Angle Sensor Module	The blind spot monitor sensor LH does not receive data from the steering sensor for approximately 11 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the ignition switch to ON 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.
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.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 7 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.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the ignition switch to ON 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.
U0232*	Lost Communication with Blind Spot Monitor Slave Module	The blind spot monitor sensor LH does not receive data from the blind spot monitor sensor RH for approximately 11 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the ignition switch to ON 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.	Both conditions are met: The ignition switch is ON for approximately 3 second or more. The power source voltage of the blind spot monitor sensor LH is 10 V or more.	Turn the ignition switch to 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.

(x) Blind Spot Monitor Sensor RH / 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 RH does not receive data from the ECM for approximately 11 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 5 km/h (3 mph) or more. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 14 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 blind spot monitor sensor RH does not receive data from the airbag sensor assembly for approximately 4 seconds or more.	All conditions are met: The ignition switch is ON for approximately 3 seconds or more. Vehicle speed is 7 km/h (4 mph) or more. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Drive the vehicle at a speed of 7 km/h (4 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.
U0126*	Lost Communication with Steering Angle Sensor Module	The blind spot monitor sensor RH does not receive data from the steering sensor for approximately 11 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the ignition switch to ON 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.
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.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 7 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.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the ignition switch to ON 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.
U0233*	Lost Communication with Blind Spot Monitor Master Module	The blind spot monitor sensor RH does not receive data from the blind spot monitor sensor LH for approximately 11 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the ignition switch to ON 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.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the blind spot monitor sensor RH is 10 V or more.	Turn the ignition switch to 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.

(y) 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)	Bus off is judged.	Both conditions are met: The ignition switch is ON 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 ignition switch to ON and wait for at least approximately 3 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 ignition switch is ON 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 ignition switch to ON and wait for at least approximately 13 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 ignition switch is ON 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 ignition switch to ON and wait for at least approximately 13 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 ignition switch is ON 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 ignition switch to ON and wait for at least approximately 13 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 ignition switch is ON 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 ignition switch to ON and wait for at least approximately 33 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 ignition switch is ON 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 ignition switch to ON and wait for at least approximately 13 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 ignition switch is ON 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 ignition switch to ON and wait for at least approximately 6 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(z) Headlight ECU Sub-assembly LH / Techstream Display "AFS"

Body Electrical > AFS > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*1: w/ K120 Continuously Variable Transaxle
*2: except K120 Continuously Variable Transaxle
*3: Refer to Lighting System (w/ AFS).
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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.	Turn the ignition switch to ON 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 transmission control ECU for approximately 10 seconds or more.1 The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.2	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.	Turn the ignition switch to ON 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*3	CAN Communication Failure(Message Registry)	CAN communication malfunction (message register)	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly LH is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 3 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(aa) Headlight ECU Sub-assembly RH / Techstream Display "AFS (Sub)"

Body Electrical > AFS (Sub) > Trouble Codes

HINT:

This ECU uses the CAN communication system for DTC communication.
*: Refer to Lighting System (w/ AFS).
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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 10 V or more.	Turn the ignition switch to ON 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.
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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 10 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the headlight ECU sub-assembly RH is 10 V or more.	Turn the ignition switch to ON and wait for at least approximately 3 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(ab) DCM (Telematics Transceiver) (for Sedan) / 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
U0142	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 ignition switch is ON for approximately 10 seconds or more. The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.	Turn the ignition switch to ON 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 DCM (telematics transceiver) does not receive data from the combination meter assembly for approximately 10 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 10 seconds or more. The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.	Turn the ignition switch to ON 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 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 ignition switch is ON for approximately 10 seconds or more. The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(ac) DCM (Telematics Transceiver) (for Hatchback) / 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 Missing Message	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 ignition switch is ON for approximately 10 seconds or more. The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.	Turn the ignition switch to ON 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 Missing Message	The DCM (telematics transceiver) does not receive data from the combination meter assembly for approximately 10 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 10 seconds or more. The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.	Turn the ignition switch to ON 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 Missing Message	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 ignition switch is ON for approximately 10 seconds or more. The power source voltage of the DCM (telematics transceiver) is 9.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 20 seconds.	-	-	DTC is stored until it is cleared using the Techstream.

(ad) 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 sensor assembly for approximately 5 seconds or more.	Both conditions are met: The ignition switch is ON for approximately 3 seconds or more. The power source voltage of the occupant detection ECU is 9.5 V or more.	Turn the ignition switch to ON 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 ignition switch is ON for approximately 3 seconds or more. The power source voltage of the occupant detection ECU is 9.5 V or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	SRS warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.

(ae) Airbag Sensor 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 sensor assembly does not receive data from the occupant detection ECU for approximately 5 seconds or more.	The ignition switch is ON for approximately 3 seconds or more.	Turn the ignition switch to ON and wait for at least approximately 8 seconds.	SRS warning light illuminates.	-	DTC is stored until it is cleared using the Techstream.

(af) 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.

(ag) 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.

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*4	Data List Items
Accelerator position	ECM	Brake actuator assembly	Forward recognition camera Radio and display receiver assembly	Engine (for M20A-FKS Engine)	Accelerator Position
				Engine and ECT (for 2ZR-FAE Engine)	Accelerator Position
				Brake	Accelerator Opening Angle %
Engine speed	ECM	Certification ECU (smart key ECU assembly) Combination meter assembly Power steering ECU with motor assembly Brake actuator assembly	Air conditioning amplifier assembly Main body ECU (multiplex network body ECU) Airbag sensor assembly Radio and display receiver assembly DCM (telematics transceiver)	Engine (for M20A-FKS Engine)	Engine Speed
				Engine and ECT (for 2ZR-FAE Engine)	Engine Speed
				Starting Control	Engine Speed
				Combination Meter	Engine RPM
				EMPS	Engine Revolution
				Brake	Engine Revolutions
Engine coolant temperature	ECM	Air conditioning amplifier assembly Combination meter assembly	Radio and display receiver assembly Certification ECU (smart key ECU assembly)	Engine (for M20A-FKS Engine)	Coolant Temperature
				Engine and ECT (for 2ZR-FAE Engine)	Coolant Temp
				Combination Meter	Coolant Temperature
				Air Conditioner	Engine Coolant Temp
Vehicle speed	Brake actuator assembly	Combination meter assembly Power steering ECU with motor assembly Radio and display receiver assembly ECM Meter mirror sub-assembly Certification ECU (smart key ECU assembly) Forward recognition camera	Main body ECU (multiplex network body ECU) Airbag sensor assembly DCM (telematics transceiver) Occupant detection ECU	Brake	Vehicle Speed
				Combination Meter	Vehicle Speed Meter
				EMPS	Meter Vehicle Velocity
				Navigation System	Vehicle Speed
				Engine (for M20A-FKS Engine)	Vehicle Speed
				Engine and ECT (for 2ZR-FAE Engine)	Vehicle Speed
				Head Up Display	Vehicle Speed Meter
				Power Source Control	Vehicle Speed Signal
				Radar Cruise2	Vehicle Speed
	Combination meter assembly*3	-	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
Wheel speed	Brake actuator assembly	Headlight ECU sub-assembly LH Power steering ECU with motor assembly	Airbag sensor assembly Blind spot monitor sensor LH Forward recognition camera Radio and display receiver assembly ECM Transmission control ECU	Brake	FR Wheel Speed
				AFS	FL Wheel Speed
				EMPS	Wheel Speed Right
Shift position	ECM Transmission control ECU	Certification ECU (smart key ECU assembly) Blind spot monitor sensor LH Brake actuator assembly Radio and display receiver assembly	Main body ECU (multiplex network body ECU) Meter mirror sub-assembly Combination meter assembly*2 Airbag sensor assembly Forward recognition camera Headlight ECU sub-assembly LH DCM (telematics transceiver)	Transmission	Shift SW Status (P Range)
				Engine (for M20A-FKS Engine)	Shift SW Status (N, P Range)
				Engine and ECT (for 2ZR-FAE Engine)	Neutral Position SW Signal
				Power Source Control	Shift P Signal
				Blind Spot Monitor Master	Reverse (Only for AT/CVT)
				Brake	Shift Lever Position
				Navigation System	Reverse Signal
Ambient temperature	Air conditioning amplifier assembly	Combination meter assembly ECM Meter mirror sub-assembly	Main body ECU (multiplex network body ECU) Brake actuator assembly Forward recognition camera DCM (telematics transceiver) Radio and display receiver assembly	Air Conditioner	Ambient Temp Sensor
				Combination Meter	Ambient Temperature (Celsius)
				Engine (for M20A-FKS Engine)	Ambient Temp for A/C
				Engine and ECT (for 2ZR-FAE 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 Brake actuator assembly Radio and display receiver assembly DCM (telematics transceiver)	Main Body	FL Door Courtesy SW
Steering angle	Steering sensor	Power steering ECU with motor assembly Brake actuator assembly Blind spot monitor sensor LH Forward recognition camera Headlight ECU sub-assembly LH	Main body ECU (multiplex network body ECU) Airbag sensor assembly Radio and display receiver assembly ECM	Blind Spot Monitor Master	Steering Angle
				EMPS	Steering Angle
				Brake	Steering Angle Value
				Radar Cruise2	Steering Angle Signal
				AFS	Steering Sens Signal
Yaw rate	Airbag sensor assembly	Blind spot monitor sensor LH	Power steering ECU with motor assembly Radio and display receiver assembly Brake actuator assembly Forward recognition camera	Blind Spot Monitor Master	Yaw Rate Sensor
Acceleration	Airbag sensor assembly	Forward recognition camera	Combination meter assembly Power steering ECU with motor assembly Radio and display receiver assembly ECM Transmission control ECU Brake actuator assembly Occupant detection ECU	Radar Cruise2	Vehicle Acceleration
Headlight switch	Main body ECU (multiplex network body ECU)	Headlight ECU sub-assembly LH Headlight ECU sub-assembly RH	Combination meter assembly*2 Forward recognition camera Radio and display receiver assembly Air conditioning amplifier assembly	Main Body	Head Light SW (Head)
				AFS	Headlight High Beam State
				AFS (Sub)	Headlight High Beam State
Ignition switch condition	Main body ECU (multiplex network body ECU)	Certification ECU (smart key ECU assembly) Radio and display receiver assembly	Meter mirror sub-assembly Headlight ECU sub-assembly LH Headlight ECU sub-assembly RH DCM (telematics transceiver)	Main Body	IG SW
				Starting Control	Ignition
				Navigation System	Ignition
Stop light switch signal	Brake actuator assembly	Certification ECU (smart key ECU assembly)	Forward recognition camera Airbag sensor assembly Power steering ECU with motor assembly Radio and display receiver assembly DCM (telematics transceiver)	Brake	Stop Light SW
Stop light switch signal	Brake actuator assembly	Certification ECU (smart key ECU assembly)		Power Source Control	Stop Light Switch 1
Side turn signal	Combination meter assembly	Blind spot monitor sensor LH Forward recognition camera	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)
				Combination Meter	Turn Signal Switch (Right)
				Blind Spot Monitor Master	Turn Switch State
				Lane Control	Turn Signal Switch (Right)
Solar sensor	Main body ECU (multiplex network body ECU)	Air conditioning amplifier assembly	-	Air Conditioner	Solar Sensor (D Side)
ECM power source voltage*1	ECM	-	-	Engine (for M20A-FKS Engine)	BATT Voltage
ECM power source voltage*1	ECM	-	-	Engine and ECT (for 2ZR-FAE Engine)	Battery Voltage
Combination meter assembly power source voltage*1	Combination meter assembly	-	-	Combination Meter	+B Voltage
Power steering ECU with motor assembly power source voltage*1	Power steering ECU with motor assembly	-	-	EMPS	IG Power Supply
Driver door touch sensor*1	Certification ECU (smart key ECU assembly)	-	-	Smart Key	D-Door Touch Sensor
Radio and display receiver assembly power source voltage*1	Radio and display receiver assembly	-	-	Navigation System	Battery Voltage
Meter mirror sub-assembly power source voltage*1	Meter mirror sub-assembly	-	-	Head Up Display	+B Voltage
Headlight ECU sub-assembly LH power source voltage*1	Headlight ECU sub-assembly LH	-	-	AFS	+B Voltage Value
Headlight ECU sub-assembly RH power source voltage*1	Headlight ECU sub-assembly RH	-	-	AFS (Sub)	+B 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 skid control ECU and sends the signal to other ECUs.
*4: According to the display on the Techstream, read the Data List.
- Enter the following menus: Powertrain / Engine / Data List.
  Click here
- Enter the following menus: Powertrain / Engine and ECT / Data List.
  Click here
- Enter the following menus: Chassis / Brake / Data List.
  Click here
- Enter the following menus: Body Electrical / Starting Control / Data List.
  Click here
- Enter the following menus: Body Electrical / Combination Meter / Data List.
  Click here
- Enter the following menus: Chassis / EMPS / 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.
  Click here (w/ Navigation System)
  
  Click here (w/ Audio and Visual System)
- Enter the following menus: Body Electrical / Head Up Display / Data List.
  Click here
- Enter the following menus: Body Electrical / Power Source Control / Data List.
  Click here
- Enter the following menus: Powertrain / Radar Cruise2 / Data List.
  Click here
- Enter the following menus: Body Electrical / AFS / Data List.
  Click here
- Enter the following menus: Body Electrical / AFS (Sub) / Data List.
  Click here
- Enter the following menus: Powertrain / Transmission / Data List.
  Click here
- Enter the following menus: Body Electrical / Blind Spot Monitor Master / Data List.
  Click here
- Enter the following menus: Body Electrical / Air Conditioner / Data List.
  Click here
- Enter the following menus: Body Electrical / Main Body / Data List.
  Click here
  
  Click here (w/AFS)
  
  Click here (w/o AFS)
- Enter the following menus: Chassis / Lane Control / Data List.
  Click here
- Enter the following menus: Body Electrical / Smart Key / Data List.
  Click here