B2799

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

DTC B2799 - Engine Immobilizer 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 ECU 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 a key code-related DTC detected in the transponder key ECU, repair it first.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. RE-REGISTER ECU COMMUNICATION ID
(a) Re-register the ECU communication ID Engine Immobilizer 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 T9 ECU and E8 ECM connectors.
(b) Measure the resistance according to the value(s) in the table below.
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 normally functioning transponder key ECU assembly, check that the engine starts.
OK:
The engine starts.
NG -- REPLACE ECM
OK -- END