NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Check Bus 6 Line; 2024 - 2025 MY Corolla Corolla HV [08/2023 - ]

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000002DQ9X
Model Year Start: 2024	Model: Corolla	Prod Date Range: [08/2023 - ]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Check Bus 6 Line; 2024 - 2025 MY Corolla Corolla HV [08/2023 - ]

Check Bus 6 Line

DESCRIPTION

Symptom	Trouble Area
There are ECUs or sensors that display a communication stop on the bus diagnostic screen. Or, there are ECUs or sensors that display communication stop history on the "Detail" screen.	CAN main bus line, CAN branch line or connector Central gateway ECU (network gateway ECU) Tire pressure warning ECU and receiver (w/ Tire Pressure Warning System) Vehicle approaching speaker controller (w/ Acoustic Vehicle Alerting System) No. 16 CAN junction connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
Click here
Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery.
HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Click here
Some parts must be initialized and set when replacing or removing and installing parts.
Click here
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
Click here

HINT:

Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.	CHECK FOR OPEN IN CAN MAIN BUS LINES

(a) Disconnect the cable from the negative (-) auxiliary battery terminal.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-31 (CA7H) - I173-32 (CA7L)	Cable disconnected from negative (-) auxiliary battery terminal	Below 70 Ω

*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))

NG

OK

2.	CHECK FOR SHORT IN CAN BUS LINES

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-31 (CA7H) - I173-32 (CA7L)	Cable disconnected from negative (-) auxiliary battery terminal	54 Ω or higher

*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))

NG

OK

3.	CHECK FOR SHORT TO +B IN CAN BUS LINE

(a) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-31 (CA7H) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I173-32 (CA7L) - I26-16 (BAT)		6 kΩ or higher

NG

OK

4.	CHECK FOR SHORT TO GND IN CAN BUS LINE

(a) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-31 (CA7H) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I173-32 (CA7L) - I26-4 (CG)		200 Ω or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

5.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I236 No. 16 CAN junction connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I236-12 (CANL) - I26-4 (CG)		200 Ω or higher

NG

OK

6.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I236-13 (CANL) - I26-4 (CG)		200 Ω or higher

NG

OK

7.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Tire Pressure Warning System	A
w/o Tire Pressure Warning System	B

B

A

8.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - TIRE PRESSURE WARNING ECU AND RECEIVER)

(a) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Tire Pressure Warning ECU and Receiver

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I236-14 (CANL) - I26-4 (CG)		200 Ω or higher

NG

OK

9.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Acoustic Vehicle Alerting System	A
w/o Acoustic Vehicle Alerting System	B

B

REPLACE NO. 16 CAN JUNCTION CONNECTOR

A

10.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - VEHICLE APPROACHING SPEAKER CONTROLLER)

(a) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Vehicle Approaching Speaker Controller

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-4 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I236-15 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE NO. 16 CAN JUNCTION CONNECTOR

NG

11.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I236-12 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

12.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I236-13 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

13.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - TIRE PRESSURE WARNING ECU AND RECEIVER)

(a) Disconnect the O170 or O171 tire pressure warning ECU and receiver connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Tire Pressure Warning ECU and Receiver

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I236-14 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - TIRE PRESSURE WARNING ECU AND RECEIVER)

14.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - VEHICLE APPROACHING SPEAKER CONTROLLER)

(a) Disconnect the I158 vehicle approaching speaker controller connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Vehicle Approaching Speaker Controller

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-4 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I236-15 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - VEHICLE APPROACHING SPEAKER CONTROLLER)

15.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I236 No. 16 CAN junction connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I236-12 (CANL) - I26-16 (BAT)		6 kΩ or higher

NG

OK

16.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I236-13 (CANL) - I26-16 (BAT)		6 kΩ or higher

NG

OK

17.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Tire Pressure Warning System	A
w/o Tire Pressure Warning System	B

B

A

18.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - TIRE PRESSURE WARNING ECU AND RECEIVER)

(a) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Tire Pressure Warning ECU and Receiver

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I236-14 (CANL) - I26-16 (BAT)		6 kΩ or higher

NG

OK

19.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Acoustic Vehicle Alerting System	A
w/o Acoustic Vehicle Alerting System	B

B

REPLACE NO. 16 CAN JUNCTION CONNECTOR

A

20.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - VEHICLE APPROACHING SPEAKER CONTROLLER)

(a) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Vehicle Approaching Speaker Controller

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-4 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I236-15 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE NO. 16 CAN JUNCTION CONNECTOR

NG

21.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I236-12 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

22.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I236-13 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

23.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - TIRE PRESSURE WARNING ECU AND RECEIVER)

(a) Disconnect the O170 or O171 tire pressure warning ECU and receiver connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Tire Pressure Warning ECU and Receiver

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I236-14 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - TIRE PRESSURE WARNING ECU AND RECEIVER)

24.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 16 CAN JUNCTION CONNECTOR - VEHICLE APPROACHING SPEAKER CONTROLLER)

(a) Disconnect the I158 vehicle approaching speaker controller connector.

(b) Measure the resistance according to the value(s) in the table below.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Vehicle Approaching Speaker Controller

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-4 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I236-15 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - VEHICLE APPROACHING SPEAKER CONTROLLER)

25.	CHECK FOR SHORT IN CAN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I236 No. 16 CAN junction connector.

(b) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-1 (CANH) - I236-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

NG

OK

26.	CHECK FOR SHORT IN CAN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-2 (CANH) - I236-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

NG

OK

27.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Tire Pressure Warning System	A
w/o Tire Pressure Warning System	B

B

A

28.	CHECK FOR SHORT IN CAN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - TIRE PRESSURE WARNING ECU AND RECEIVER)

(a) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Tire Pressure Warning ECU and Receiver

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-3 (CANH) - I236-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher

NG

OK

29.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Acoustic Vehicle Alerting System	A
w/o Acoustic Vehicle Alerting System	B

B

REPLACE NO. 16 CAN JUNCTION CONNECTOR

A

30.	CHECK FOR SHORT IN CAN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - VEHICLE APPROACHING SPEAKER CONTROLLER)

(a) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Vehicle Approaching Speaker Controller

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-4 (CANH) - I236-15 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher

OK

REPLACE NO. 16 CAN JUNCTION CONNECTOR

NG

31.	CHECK FOR SHORT IN CAN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-1 (CANH) - I236-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

32.	CHECK FOR SHORT IN CAN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-2 (CANH) - I236-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

33.	CHECK FOR SHORT IN CAN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - TIRE PRESSURE WARNING ECU AND RECEIVER)

(a) Disconnect the O170 or O171 tire pressure warning ECU and receiver connector.

(b) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Tire Pressure Warning ECU and Receiver

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-3 (CANH) - I236-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - TIRE PRESSURE WARNING ECU AND RECEIVER)

34.	CHECK FOR SHORT IN CAN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - VEHICLE APPROACHING SPEAKER CONTROLLER)

(a) Disconnect the I158 vehicle approaching speaker controller connector.

(b) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Vehicle Approaching Speaker Controller

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-4 (CANH) - I236-15 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

OK

REPLACE VEHICLE APPROACHING SPEAKER CONTROLLER

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 16 CAN JUNCTION CONNECTOR - VEHICLE APPROACHING SPEAKER CONTROLLER)

35.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I236 No. 16 CAN junction connector.

(b) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-1 (CANH) - I236-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

NG

OK

36.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 16 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Measure the resistance according to the value(s) in the table below.

*a

Front view of wire harness connector

(to No. 16 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I236-2 (CANH) - I236-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

OK

REPLACE NO. 16 CAN JUNCTION CONNECTOR

NG

37.	CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Reconnect the I236 No. 16 CAN junction connector.

(b) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-31 (CA7H) - I173-10 (CAVH)	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω
I173-32 (CA7L) - I173-11 (CAVL)	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

*a	Front view of wire harness connector (to Central Gateway ECU (Network Gateway ECU))

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 16 CAN JUNCTION CONNECTOR)