Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000028Z93
Model Year Start: 2023 Model: Corolla Prod Date Range: [11/2022 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): B278196,B278211,B278215,B279F1C; Steering Lock System Component Internal Failure; 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]

DTC

B278196

Steering Lock System Component Internal Failure

DTC

B278211

Power Source Control System Circuit Short to Ground

DTC

B278215

Power Source Control System Circuit Short to Battery or Open

DTC

B279F1C

Steering Lock Confirmation Signal Circuit Voltage Out of Range

DESCRIPTION

As this DTC is not normally output, it may be due to noise in the LIN communication system, etc.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B278196

Steering Lock System Component Internal Failure

Noise in the LIN communication system, etc.

ID code box (immobiliser code ECU)

DTC Output Confirmation Operation:

  • No confirmation operation is necessary (monitoring is continuous).

B278211

Power Source Control System Circuit Short to Ground

Noise in the LIN communication system, etc.

ID code box (immobiliser code ECU)

DTC Output Confirmation Operation:

  • No confirmation operation is necessary (monitoring is continuous).

B278215

Power Source Control System Circuit Short to Battery or Open

Noise in the LIN communication system, etc.

ID code box (immobiliser code ECU)

DTC Output Confirmation Operation:

  • No confirmation operation is necessary (monitoring is continuous).

B279F1C

Steering Lock Confirmation Signal Circuit Voltage Out of Range

Noise in the LIN communication system, etc.

ID code box (immobiliser code ECU)

DTC Output Confirmation Operation:

  • No confirmation operation is necessary (monitoring is continuous).

Vehicle Condition and Fail-safe Function when Malfunction Detected

DTC Code

Vehicle Condition when Malfunction Detected

Fail-safe Function when Malfunction Detected

B278187

The hybrid control system cannot be started.

-

B278211

B278215

B279F1C

Related Data List and Active Test Items

DTC No.

Data List and Active Test

B278187

B278211

B278215

B279F1C

-

CAUTION / NOTICE / HINT

NOTICE:

  • When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins.

    Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Start Key(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the ID code box (immobiliser code ECU), refer to Registration.

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

  • After performing repairs, confirm that no DTCs are output again.

HINT:

When all the ECUs that are connected via LIN communication cannot communicate with the certification ECU (smart key ECU assembly), DTC B278588 is stored.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Smart Key > Clear DTCs

NEXT

2.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Smart Key > Trouble Codes

Result

Proceed to

DTC is output

A

DTC is not output

B
A

REPLACE ID CODE BOX (IMMOBILISER CODE ECU)

B

END