B2799

ENGINE IMMOBILIZER: ENGINE IMMOBILIZER SYSTEM: B2799: Engine Immobilizer System Malfunction

DTC B2799 - Engine Immobilizer 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





INSPECTION 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 Removal.
(b) Check that the engine starts.
OK:
Engine starts.
NG -- REPLACE ECM
OK -- END (TRANSPONDER KEY ECU IS DEFECTIVE)