NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model TMC Made): Check Bus 4 Line; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM1000000026ENH
Model Year Start: 2023	Model: GR Corolla	Prod Date Range: [09/2022 - 11/2022]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model TMC Made): Check Bus 4 Line; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

Check Bus 4 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) Steering sensor Brake actuator assembly Airbag sensor assembly Power steering ECU with motor assembly No. 10 CAN junction connector No. 13 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 (-) battery terminal and leave the vehicle for 10 minutes or more before measuring the resistance.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.
Click here
When disconnecting and reconnecting the battery.
HINT:

When disconnecting and reconnecting the 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 (-) battery terminal.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-24 (CA2H) - I173-23 (CA2L)	Cable disconnected from negative (-) battery terminal	Below 70 Ω

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

GO TO STEP 41

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
I173-24 (CA2H) - I173-23 (CA2L)	Cable disconnected from negative (-) battery terminal	54 Ω or higher

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

GO TO STEP 29

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

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

DLC3

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-24 (CA2H) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I173-23 (CA2L) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

GO TO STEP 17

4.	CHECK FOR SHORT TO GND IN CAN BUS LINE

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

DLC3

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-24 (CA2H) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I173-23 (CA2L) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

5.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the A142 No. 10 CAN junction connector.

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

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-4 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A142-8 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

GO TO STEP 8

6.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - NO. 13 CAN JUNCTION CONNECTOR)

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

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to No. 13 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A142-7 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

GO TO STEP 10

7.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

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

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Brake Actuator Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A142-6 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPLACE NO. 10 CAN JUNCTION CONNECTOR

GO TO STEP 9

8.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 10 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.

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-4 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A142-8 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

9.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

(a) Disconnect the A51 or A140 brake actuator assembly connector.

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

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Brake Actuator Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A142-6 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

10.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

(a) Disconnect the I187 No. 13 CAN junction connector.

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to No. 10 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I187-6 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

11.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I187-5 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

GO TO STEP 14

12.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - STEERING SENSOR)

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Steering Sensor

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I187-7 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

GO TO STEP 15

13.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-4 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I187-8 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPLACE NO. 13 CAN JUNCTION CONNECTOR

GO TO STEP 16

14.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the I47 airbag sensor assembly connector.

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I187-5 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPLACE AIRBAG SENSOR ASSEMBLY

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

15.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - STEERING SENSOR)

(a) Disconnect the I211 or I46 steering sensor connector.

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Steering Sensor

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I187-7 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPLACE STEERING SENSOR

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - STEERING SENSOR)

16.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

(a) Disconnect the I21 power steering ECU with motor assembly connector.

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-4 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I187-8 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

17.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the A142 No. 10 CAN junction connector.

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

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-4 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A142-8 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

GO TO STEP 20

18.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - NO. 13 CAN JUNCTION CONNECTOR)

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

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to No. 13 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A142-7 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

GO TO STEP 22

19.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

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

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Brake Actuator Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A142-6 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

REPLACE NO. 10 CAN JUNCTION CONNECTOR

GO TO STEP 21

20.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 10 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.

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-4 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A142-8 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

21.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

(a) Disconnect the A51 or A140 brake actuator assembly connector.

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

DLC3

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Brake Actuator Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A142-6 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

22.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

(a) Disconnect the I187 No. 13 CAN junction connector.

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to No. 10 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I187-6 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

23.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I187-5 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

GO TO STEP 26

24.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - STEERING SENSOR)

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Steering Sensor

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I187-7 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

GO TO STEP 27

25.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-4 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I187-8 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

REPLACE NO. 13 CAN JUNCTION CONNECTOR

GO TO STEP 28

26.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the I47 airbag sensor assembly connector.

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I187-5 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

REPLACE AIRBAG SENSOR ASSEMBLY

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

27.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - STEERING SENSOR)

(a) Disconnect the I211 or I46 steering sensor connector.

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Steering Sensor

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I187-7 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

REPLACE STEERING SENSOR

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - STEERING SENSOR)

28.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

(a) Disconnect the I21 power steering ECU with motor assembly connector.

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

DLC3

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-4 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I187-8 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

29.	CHECK FOR SHORT IN CAN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the A142 No. 10 CAN junction connector.

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

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-4 (CANH) - A142-8 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

GO TO STEP 32

30.	CHECK FOR SHORT IN CAN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR - NO. 13 CAN JUNCTION CONNECTOR)

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

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to No. 13 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-3 (CANH) - A142-7 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

GO TO STEP 34

31.	CHECK FOR SHORT IN CAN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

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

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Brake Actuator Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-2 (CANH) - A142-6 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

REPLACE NO. 10 CAN JUNCTION CONNECTOR

GO TO STEP 33

32.	CHECK FOR SHORT IN CAN BUS LINES (NO. 10 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.

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-4 (CANH) - A142-8 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

33.	CHECK FOR SHORT IN CAN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

(a) Disconnect the A51 or A140 brake actuator assembly connector.

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

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Brake Actuator Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-2 (CANH) - A142-6 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

REPLACE BRAKE ACTUATOR ASSEMBLY

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

34.	CHECK FOR SHORT IN CAN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

(a) Reconnect the A142 No. 10 CAN junction connector.

(b) Disconnect the I187 No. 13 CAN junction connector.

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to No. 10 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-2 (CANH) - I187-6 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

35.	CHECK FOR SHORT IN CAN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

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

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-1 (CANH) - I187-5 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

GO TO STEP 38

36.	CHECK FOR SHORT IN CAN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR - STEERING SENSOR)

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

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Steering Sensor

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-3 (CANH) - I187-7 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

GO TO STEP 39

37.	CHECK FOR SHORT IN CAN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

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

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-4 (CANH) - I187-8 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPLACE NO. 13 CAN JUNCTION CONNECTOR

GO TO STEP 40

38.	CHECK FOR SHORT IN CAN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the I47 airbag sensor assembly connector.

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

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-1 (CANH) - I187-5 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

REPLACE AIRBAG SENSOR ASSEMBLY

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - AIRBAG SENSOR ASSEMBLY)

39.	CHECK FOR SHORT IN CAN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR - STEERING SENSOR)

(a) Disconnect the I211 or I46 steering sensor connector.

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

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Steering Sensor

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-3 (CANH) - I187-7 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

REPLACE STEERING SENSOR

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - STEERING SENSOR)

40.	CHECK FOR SHORT IN CAN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

(a) Disconnect the I21 power steering ECU with motor assembly connector.

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

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-4 (CANH) - I187-8 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

41.	CHECK FOR OPEN IN CAN MAIN BUS LINES (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.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-24 (CA2H) - I173-23 (CA2L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

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

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

42.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

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

(b) Disconnect the A142 No. 10 CAN junction connector.

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-4 (CANH) - A142-8 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

43.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR - NO. 13 CAN JUNCTION CONNECTOR)

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

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

to No. 13 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A142-3 (CANH) - A142-7 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPLACE NO. 10 CAN JUNCTION CONNECTOR

44.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

(a) Reconnect the A142 No. 10 CAN junction connector.

(b) Disconnect the I187 No. 13 CAN junction connector.

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to No. 10 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-2 (CANH) - I187-6 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 13 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR)

45.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 13 CAN JUNCTION CONNECTOR - POWER STEERING ECU WITH MOTOR ASSEMBLY)

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

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I187-4 (CANH) - I187-8 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

REPLACE NO. 13 CAN JUNCTION CONNECTOR

46.	CHECK FOR OPEN IN CAN MAIN BUS LINES (POWER STEERING ECU WITH MOTOR ASSEMBLY)

(a) Reconnect the I187 No. 13 CAN junction connector.

(b) Disconnect the I21 power steering ECU with motor assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I21-7 (CANH) - I21-8 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

*a	Front view of wire harness connector (to Power Steering ECU with Motor Assembly)

REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (POWER STEERING ECU WITH MOTOR ASSEMBLY - NO. 13 CAN JUNCTION CONNECTOR)