Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000295BA
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): B279C95; Engine Immobiliser System Incorrect Assembly; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

DTC

B279C95

Engine Immobiliser System Incorrect Assembly

DESCRIPTION

  • If a hybrid vehicle control ECU that is incompatible with the immobiliser system is installed, the hybrid vehicle control ECU stores this DTC.*1
  • If an ECM that is incompatible with the immobiliser system is installed, the ECM stores this DTC.*2
    • *1: for HV Model
    • *2: for Gasoline Model

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B279C95

Engine Immobiliser System Incorrect Assembly
  • A hybrid vehicle control ECU that is incompatible with immobiliser system is installed.*1
  • An ECM that is incompatible with immobiliser system is installed.*2
  • Hybrid vehicle control ECU*1
  • ECM*2

DTC Output Confirmation Operation:

  • Check for DTCs.
  • *1: for HV Model
  • *2: for Gasoline Model

Vehicle Condition and Fail-safe Operation when Malfunction Detected

Vehicle Condition when Malfunction Detected

Fail-safe Operation when Malfunction Detected
  • Hybrid control system cannot be started*1
  • Engine cannot be started*2

-
  • *1: for HV Model
  • *2: for Gasoline Model

Related Data List and Active Test

DTC No.

Data List and Active Test

B279C95

-

CAUTION / NOTICE / HINT

NOTICE:

  • If the hybrid vehicle control ECU is replaced, refer to Registration.*1

    If the ECM is replaced, refer to Registration.*2

    Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION

    • *1: for HV Model
    • *2: for Gasoline Model
  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

SYSTEM CHECK

(a) Check the vehicle specification.

Result

Proceed to

for HV Model

A

for Gasoline Model

B
B

GO TO STEP 3

A

2.

REPLACE HYBRID VEHICLE CONTROL ECU

(a) Replace the hybrid vehicle control ECU with a proper hybrid vehicle control ECU.

Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; HYBRID / BATTERY CONTROL: HYBRID VEHICLE CONTROL ECU: REMOVAL

NEXT

END (HYBRID VEHICLE CONTROL ECU WAS DEFECTIVE)

3.

REPLACE ECM

(a) Replace the ECM.

Click here 2023 MY Corolla Corolla Hatchback [11/2022 - 03/2023]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback [03/2023 -        ]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL

NEXT

END (ECM WAS DEFECTIVE)