Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028KBZ
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): B279C95,B279C; Engine Immobiliser System Incorrect Assembly; 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]

DTC

B279C95

Engine Immobiliser System Incorrect Assembly

DTC

B279C

Theft Deterrent System Presence Detection

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

B279C

Theft Deterrent System Presence Detection

An ECM that is incompatible with immobiliser system is installed.

ECM

DTC Output Confirmation Operation:

  • Check for DTCs.

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

B279C*1

-

B279C95*2

-
  • *1: for 2ZR-FAE
  • *2: for M20A-FKS

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 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 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.

for M20A-FKS: Click here 2023 MY Corolla Corolla Hatchback [09/2022 - 11/2022]; M20A-FKS (ENGINE CONTROL): ECM: REMOVAL

for 2ZR-FAE: Click here 2023 MY Corolla [09/2022 - 11/2022]; 2ZR-FAE (ENGINE CONTROL): ECM: REMOVAL

NEXT

END (ECM WAS DEFECTIVE)