B2790

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM (w/ Smart Key System): B2790: ID BOX EEPROM Malfunction
B2790 - ID BOX EEPROM Malfunction

DESCRIPTION

When an internal malfunction occurs in the ID code box (immobiliser code ECU), the certification ECU (smart key ECU assembly) stores this DTC.





* *: Only output while a malfunction is present.

Vehicle Condition and Fail-safe Operation when Malfunction Detected





Related Data List and Active Test





INSPECTION PROCEDURE

NOTICE:
* Before replacing the certification ECU (smart key ECU assembly), refer to Registration Engine Immobilizer System (w/ Smart Key System).
* After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

PROCEDURE

1. REPLACE ID CODE BOX

(a) Replace the ID code box (immobiliser code ECU) Removal.

NEXT -- Continue to next step.

2. CLEAR DTC

(a) Clear the DTCs Engine Immobilizer System (w/ Smart Key System).

NEXT -- Continue to next step.

3. REGISTER RECOGNITION CODES

(a) Register the recognition codes in the ECUs Engine Immobilizer System (w/ Smart Key System).

NEXT -- Continue to next step.

4. REGISTER ECU COMMUNICATION ID

(a) Register the ECU communication ID Engine Immobilizer System (w/ Smart Key System).

NEXT -- Continue to next step.

5. CHECK FOR DTC

(a) Check for DTCs Engine Immobilizer System (w/ Smart Key System).

HINT
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

OK:

DTC B2790 is not output.

NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

OK -- END (ID CODE BOX [IMMOBILISER CODE ECU] IS DEFECTIVE)