B2799

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2799: Engine Immobiliser System Malfunction

DTC B2799 - Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is output when the ECM detects errors in communication between the transponder key ECU and the ECM, or in the communication lines. This DTC is also output when an engine start is attempted while the ECM Communication ID between the transponder key ECU and the ECM are different. Before troubleshooting for this DTC, make sure that there is no DTC detected in the transponder key ECU. If there is key code-related DTC detected in the transponder key ECU, repair it first.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. RE-REGISTER ECM COMMUNICATION ID
(a) Re-register the ECM Communication ID Engine Immobiliser System between the transponder key ECU assembly and ECM.
(b) Check that the engine starts.
OK:
The engine starts.
OK -- END

NG -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)




(a) Disconnect the T8 ECU and E7 ECM connectors.
(b) Check the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK TRANSPONDER KEY ECU ASSEMBLY
(a) After replacing the transponder key ECU assembly with a new transponder key ECU assembly Removal, check that the engine starts.
OK:
The engine starts.

NG -- REPLACE ECM
OK -- END