Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001H79E
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 09/2019]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): HOW TO PROCEED WITH TROUBLESHOOTING; 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the power steering system.
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
NEXT

2.

INSPECT BATTERY

(a) Turn the ignition switch off.

(b) Measure the voltage of the battery.

Standard Voltage:

11 to 14 V

HINT:

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

NEXT

3.

CHECK DTC AND FREEZE FRAME DATA*

HINT:

Refer to DTC Check / Clear.

Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): DTC CHECK / CLEAR

Chassis > EMPS > Trouble Codes

NEXT

4.

PROBLEM SYMPTOM CONFIRMATION

Result

Proceed to

Symptom does not occur.

A

Symptom occurs.

B
B

GO TO STEP 6

A

5.

SYMPTOM SIMULATION
NEXT

6.

CHECK CAN COMMUNICATION SYSTEM*

(a) Check for DTCs.

Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM 2020 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2019]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): DIAGNOSIS SYSTEM

Result

Proceed to

CAN communication system DTCs are not output.

A

CAN communication system DTCs are output.

B

HINT:

  • If any CAN communication system DTCs are output, perform troubleshooting for the CAN communication system first.
  • If communication to the power steering ECU with motor assembly cannot be established through the Techstream, inspect terminals CANH and CANL of the DLC3 and the power steering ECU with motor assembly, and the IG circuit of the power steering ECU with motor assembly.
B

PROCEED TO CAN COMMUNICATION SYSTEM

A

7.

CHECK FOR DTC*

(a) Check for DTCs.

Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): DTC CHECK / CLEAR

Chassis > EMPS > Trouble Codes

HINT:

Refer to Diagnostic Trouble Code Chart when any DTCs are output.

Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): DIAGNOSTIC TROUBLE CODE CHART 2020 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): DIAGNOSTIC TROUBLE CODE CHART

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B
B

GO TO STEP 10

A

8.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): PROBLEM SYMPTOMS TABLE

Result

Proceed to

Fault is not listed in Problem Symptoms Table.

A

Fault is listed in Problem Symptoms Table.

B
B

GO TO STEP 10

A

9.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Refer to Terminals of ECU.

Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): TERMINALS OF ECU

(b) Refer to Data List / Active Test.

Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): DATA LIST / ACTIVE TEST

NEXT

10.

REPAIR OR REPLACE
NEXT

11.

CONFIRMATION TEST
NEXT

END