Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000259R7
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 - 08/2023]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Check Bus 4 Line; 2023 MY Corolla Corolla HV [09/2022 - 08/2023]

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
  • Electric brake booster (brake booster with master cylinder assembly)
  • Skid control ECU (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 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • 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 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: BEFORE DISCONNECTING BATTERY

  • 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 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SETUP: WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL: AUTOMATIC LEARNING CHART

  • Some parts must be initialized and set when replacing or removing and installing parts.

    Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - 03/2023]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2023 - 08/2023]; SETUP: WHEN REPLACING OR REMOVING/INSTALLING PARTS: WORK PROCEDURE

  • 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 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): DIAGNOSIS SYSTEM

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

I173-24 (CA2H) - I173-23 (CA2L)

Cable disconnected from negative (-) auxiliary battery terminal

Below 70 Ω

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

NG

GO TO STEP 47

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

I173-24 (CA2H) - I173-23 (CA2L)

Cable disconnected from negative (-) auxiliary battery terminal

54 Ω or higher

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

NG

GO TO STEP 33

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

I173-24 (CA2H) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I173-23 (CA2L) - I26-16 (BAT)

NG

GO TO STEP 19

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

I173-24 (CA2H) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I173-23 (CA2L) - I26-4 (CG)

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL

NG

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-4 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A142-8 (CANL) - I26-4 (CG)

NG

GO TO STEP 9

OK

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to No. 13 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-3 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A142-7 (CANL) - I26-4 (CG)

NG

GO TO STEP 12

OK

7.

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

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-2 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A142-6 (CANL) - I26-4 (CG)

NG

GO TO STEP 10

OK

8.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-1 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A142-5 (CANL) - I26-4 (CG)

OK

REPLACE NO. 10 CAN JUNCTION CONNECTOR

NG

GO TO STEP 11

9.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-4 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A142-8 (CANL) - I26-4 (CG)

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL

NG

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

10.

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

(a) Disconnect the A51 skid control ECU (brake actuator assembly) 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. 10 CAN Junction Connector)

*b

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-2 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A142-6 (CANL) - I26-4 (CG)

OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

NG

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

11.

CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

(a) Disconnect the A157 electric brake booster (brake booster with master cylinder assembly) 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. 10 CAN Junction Connector)

*b

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-1 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A142-5 (CANL) - I26-4 (CG)

OK

REPLACE ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

12.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to No. 10 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-2 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I187-6 (CANL) - I26-4 (CG)

NG

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

OK

13.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-1 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I187-5 (CANL) - I26-4 (CG)

NG

GO TO STEP 16

OK

14.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Steering Sensor

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-3 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I187-7 (CANL) - I26-4 (CG)

NG

GO TO STEP 17

OK

15.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-4 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I187-8 (CANL) - I26-4 (CG)

OK

REPLACE NO. 13 CAN JUNCTION CONNECTOR

NG

GO TO STEP 18

16.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-1 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I187-5 (CANL) - I26-4 (CG)

OK

REPLACE AIRBAG SENSOR ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

NG

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

17.

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

(a) Disconnect the I211 steering sensor 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. 13 CAN Junction Connector)

*b

to Steering Sensor

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-3 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I187-7 (CANL) - I26-4 (CG)

OK

REPLACE STEERING SENSOR 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL

NG

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

18.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-4 (CANH) - I26-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

I187-8 (CANL) - I26-4 (CG)

OK

REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

NG

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

19.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-4 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A142-8 (CANL) - I26-16 (BAT)

NG

GO TO STEP 23

OK

20.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to No. 13 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-3 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A142-7 (CANL) - I26-16 (BAT)

NG

GO TO STEP 26

OK

21.

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

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-2 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A142-6 (CANL) - I26-16 (BAT)

NG

GO TO STEP 24

OK

22.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-1 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A142-5 (CANL) - I26-16 (BAT)

OK

REPLACE NO. 10 CAN JUNCTION CONNECTOR

NG

GO TO STEP 25

23.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-4 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A142-8 (CANL) - I26-16 (BAT)

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL

NG

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

24.

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

(a) Disconnect the A51 skid control ECU (brake actuator assembly) 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. 10 CAN Junction Connector)

*b

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-2 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A142-6 (CANL) - I26-16 (BAT)

OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

NG

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

25.

CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 10 CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

(a) Disconnect the A157 electric brake booster (brake booster with master cylinder assembly) 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. 10 CAN Junction Connector)

*b

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-1 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A142-5 (CANL) - I26-16 (BAT)

OK

REPLACE ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

26.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to No. 10 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-2 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I187-6 (CANL) - I26-16 (BAT)

NG

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

OK

27.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-1 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I187-5 (CANL) - I26-16 (BAT)

NG

GO TO STEP 30

OK

28.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Steering Sensor

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-3 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I187-7 (CANL) - I26-16 (BAT)

NG

GO TO STEP 31

OK

29.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-4 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I187-8 (CANL) - I26-16 (BAT)

OK

REPLACE NO. 13 CAN JUNCTION CONNECTOR

NG

GO TO STEP 32

30.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-1 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I187-5 (CANL) - I26-16 (BAT)

OK

REPLACE AIRBAG SENSOR ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

NG

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

31.

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

(a) Disconnect the I211 steering sensor 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. 13 CAN Junction Connector)

*b

to Steering Sensor

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-3 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I187-7 (CANL) - I26-16 (BAT)

OK

REPLACE STEERING SENSOR 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL

NG

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

32.

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.

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-4 (CANH) - I26-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

I187-8 (CANL) - I26-16 (BAT)

OK

REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

NG

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

33.

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.

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-4 (CANH) - A142-8 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

GO TO STEP 37

OK

34.

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.

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to No. 13 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-3 (CANH) - A142-7 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

GO TO STEP 40

OK

35.

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

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

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-2 (CANH) - A142-6 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

NG

GO TO STEP 38

OK

36.

CHECK FOR SHORT IN CAN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

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

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-1 (CANH) - A142-5 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

OK

REPLACE NO. 10 CAN JUNCTION CONNECTOR

NG

GO TO STEP 39

37.

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.

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-4 (CANH) - A142-8 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL

NG

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

38.

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

(a) Disconnect the A51 skid control ECU (brake actuator assembly) connector.

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

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Skid Control ECU (Brake Actuator Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-2 (CANH) - A142-6 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

NG

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

39.

CHECK FOR SHORT IN CAN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

(a) Disconnect the A157 electric brake booster (brake booster with master cylinder assembly) connector.

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

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Electric Brake Booster (Brake Booster with Master Cylinder Assembly)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-1 (CANH) - A142-5 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

OK

REPLACE ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY)

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 10 CAN JUNCTION CONNECTOR - ELECTRIC BRAKE BOOSTER (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY))

40.

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.

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

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to No. 10 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-2 (CANH) - I187-6 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

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

OK

41.

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.

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-1 (CANH) - I187-5 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

NG

GO TO STEP 44

OK

42.

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.

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Steering Sensor

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-3 (CANH) - I187-7 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

NG

GO TO STEP 45

OK

43.

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.

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-4 (CANH) - I187-8 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

REPLACE NO. 13 CAN JUNCTION CONNECTOR

NG

GO TO STEP 46

44.

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.

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Airbag Sensor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-1 (CANH) - I187-5 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

OK

REPLACE AIRBAG SENSOR ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: REMOVAL

NG

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

45.

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

(a) Disconnect the I211 steering sensor connector.

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

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Steering Sensor

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-3 (CANH) - I187-7 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

OK

REPLACE STEERING SENSOR 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: STEERING ANGLE SENSOR: REMOVAL

NG

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

46.

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.

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-4 (CANH) - I187-8 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

1 MΩ or higher

OK

REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

NG

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

47.

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 (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Central Gateway ECU (Network Gateway ECU))

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; NETWORKING: NETWORK GATEWAY ECU: REMOVAL

NG

48.

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.

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

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-4 (CANH) - A142-8 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

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

OK

49.

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.

*a

Front view of wire harness connector

(to No. 10 CAN Junction Connector)

*b

to No. 13 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

A142-3 (CANH) - A142-7 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

REPLACE NO. 10 CAN JUNCTION CONNECTOR

NG

50.

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.

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

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to No. 10 CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-2 (CANH) - I187-6 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

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

OK

51.

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.

*a

Front view of wire harness connector

(to No. 13 CAN Junction Connector)

*b

to Power Steering ECU with Motor Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

I187-4 (CANH) - I187-8 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

OK

REPLACE NO. 13 CAN JUNCTION CONNECTOR

NG

52.

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.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I21-7 (CANH) - I21-8 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Power Steering ECU with Motor Assembly)

OK

REPLACE POWER STEERING ECU WITH MOTOR ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

NG

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