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 assembly; 2) the ECM detects errors in the communication lines; and 3) the communication ID between the transponder key ECU assembly and the ECM is different and an engine start is attempted.
Before troubleshooting for this DTC, make sure no transponder key ECU assembly DTCs are present. If any DTC for the transponder key ECU assembly is present, repair it first.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. RE-REGISTER ECU COMMUNICATION ID
(a) Re-register the ECU communication ID (Programming and Relearning) 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





(a) Disconnect the T10 ECU and E5 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