Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028T2X
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: POWER DISTRIBUTION: POWER INTEGRATION SYSTEM: B235A9F; IGR Diode Stuck Off; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

DTC

B235A9F

IGR Diode Stuck Off

DESCRIPTION

This DTC is output when a diode failure between the IGP input and the IGR input in the power distribution box assembly is detected.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B235A9F

IGR Diode Stuck Off

At the time of IGP input state ON, an IGR input state continues OFF state for three consecutive trips.

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.
  • Before performing troubleshooting, check whether there are any malfunctions with the lighting system.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; LIGHTING (EXT): LIGHTING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

  • Before performing troubleshooting, check whether there are any malfunctions with the air conditioning system(for HV Model).

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before performing troubleshooting, check whether there are any malfunctions with the air conditioning system(for Gasoline Model, with Automatic Air Conditioning System).

    Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before performing troubleshooting, check whether there are any malfunctions with the air conditioning system(for Gasoline Model, with Manual Air Conditioning System).

    Click here 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Manual Air Conditioning System): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before performing troubleshooting, check whether there are any malfunctions with the window defogger system.

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; WINDOW / GLASS: WINDOW DEFOGGER SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Power Distribution Box > Clear DTCs

NEXT

2.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Power Distribution Box > Trouble Codes

Result

Proceed to

B235A9F is output

A

B235A9F is not output

B
A

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

B

USE SIMULATION METHOD TO CHECK