Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM10000000263SE
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: B235504; Power Distribution Box System Internal Failure; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

DTC

B235504

Power Distribution Box System Internal Failure

DESCRIPTION

This DTC is output when the power distribution box assembly detects an internal circuit error.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B235504

Power Distribution Box System Internal Failure

  • Microcomputer abnormality
  • AD circuit trouble
  • The load drive output open or short trouble

Power distribution box assembly

WIRING DIAGRAM

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

CAUTION / NOTICE / HINT

NOTICE:

  • When using the GTS with the ignition switch off to troubleshoot:

    Connect the GTS to the vehicle, and turn a courtesy switch on and off at 1.5 second intervals until communication between the GTS and vehicle begins.

  • Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CONFIRM PROBLEM SYMPTOMS

(a) Check that no dependent system of the power distribution box assembly is malfunctioning.

HINT:

Refer to the link for dependent systems of the power distribution box assembly.

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

Result

Proceed to

No dependent system of the power distribution box assembly is malfunctioning

A

A dependent system of the power distribution box assembly is malfunctioning

B

A

GO TO STEP 3

B

2.

INSPECT RELATED SYSTEMS

(a) Perform an inspection for each malfunctioning system by following "HOW TO PROCEED WITH TROUBLESHOOTING".

Result

Proceed to

No related system is malfunctioning

A

A related system is malfunctioning

B

B

REPAIR OR REPLACE MALFUNCTIONING COMPONENT

A

3.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Power Distribution Box > Clear DTCs

NEXT

4.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Power Distribution Box > Trouble Codes

Result

Proceed to

B235504 is not output

A

B235504 is output

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE POWER DISTRIBUTION BOX ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL