B2799

ENGINE IMMOBILISER: 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 communication with the transponder key ECU; 2) the ECM detects errors in the communication lines; and 3) the ECU - ECM communication IDs 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 HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)




(a) Disconnect the D23 transponder key ECU connector.
(b) Disconnect the A21 ECM connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:





(d) Reconnect the D23 transponder key ECU connector.
(e) Reconnect the A21 ECM connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE ECM