B2799

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

DESCRIPTION

This DTC is output when one of the following occurs: 1) the ECM detects errors in its own communications with the transponder key ECU; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the transponder key ECU and ECM is different and an engine start is attempted.





WIRING DIAGRAM





INSEPCTION PROCEDURE

HINT
Before troubleshooting for this DTC, make sure no transponder key ECU DTCs are present. If present, troubleshoot the transponder key ECU DTCs first.

PROCEDURE

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





(a) Disconnect the T13 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 OR CONNECTOR
OK -- Continue to next step.

2. CHECK TRANSPONDER KEY ECU (OPERATION)

(a) Temporarily replace the transponder key ECU with a new one Service and Repair.

(b) Check that the engine starts.

OK:

Engine starts.

NG -- REPLACE ECM Service and Repair

OK -- END (TRANSPONDER KEY ECU IS DEFECTIVE)