B2799

ENGINE IMMOBILISER SYSTEM: B2799: Engine Immobiliser System Malfunction

DTC B2799 - Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is output when: 1) the ECM detects errors in its own communications with the transponder key ECU; 2) the ECM detects errors in the communication lines; and 3) the ECU communication ID between the transponder key ECU and the ECM are different and an engine start is attempted.
Before troubleshooting for this DTC, make sure no transponder key ECU DTCs are present. If present, troubleshoot the transponder key ECU DTCs first.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSEMBLY - ECM)





(a) Disconnect the T5 ECU connector.
(b) Disconnect the E5 ECM connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE ECM