Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000263S6
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

HINT:

  • Use these procedures to troubleshoot the power integration system.
  • *: Use the GTS.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP

NEXT

2.

INSPECT AUXILIARY BATTERY VOLTAGE

(a) Measure the auxiliary battery voltage with the ignition switch off.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.

NEXT

3.

CHECK COMMUNICATION FUNCTION OF CXPI COMMUNICATION SYSTEM*

(a) Using the GTS, check the CXPI communication function to ensure that there are no malfunctions in the communication system.

DTCs output

GO TO CXPI COMMUNICATION SYSTEM

No DTCs output

4.

CHECK VEHICLE CONTROL HISTORY (RoB)*

(a) Using the GTS, check for Vehicle Control History (RoB).

Body Electrical > Power Distribution Box > Utility

Tester Display

Vehicle Control History (RoB)

(b) If the vehicle control history (RoB) is output, record it.

Result

Proceed to

Vehicle Control History (RoB) is not output

A

Vehicle Control History (RoB) is output

B

B

GO TO VEHICLE CONTROL HISTORY

A

5.

CHECK FOR DTC*

(a) Check for DTCs and make a note of any codes that are output.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: DTC CHECK / CLEAR

(b) Clear the DTCs.

Body Electrical > Power Distribution Box > Clear DTCs

(c) Recheck for DTCs.

Body Electrical > Power Distribution Box > Trouble Codes

DTCs output

GO TO DIAGNOSTIC TROUBLE CODE CHART 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: DIAGNOSTIC TROUBLE CODE CHART 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: DIAGNOSTIC TROUBLE CODE CHART

No DTCs output

6.

PROBLEM SYMPTOMS TABLE

(a) Refer to the Problem Symptoms Table.

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: PROBLEM SYMPTOMS TABLE

Fault is listed in problem symptoms table

ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE

Fault is not listed in problem symptoms table

7.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: DATA LIST / ACTIVE TEST

(b) Terminals of ECU

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: TERMINALS OF ECU

(c) Problem Symptoms Table

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]; POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: PROBLEM SYMPTOMS TABLE

NEXT

8.

ADJUST, REPAIR OR REPLACE

NEXT

END