Engine Immobiliser System

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2799/99: Engine Immobiliser System Malfunction

DTC B2799/99 - 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 ECU 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 the transponder key ECU assembly has a key code related DTC, repair it first.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT
(a) Delete the DTCs .
(b) Recheck for DTCs.
OK:
B2799/99 output does not recur.
NG -- RE-REGISTER ECU COMMUNICATION ID
OK -- USE SIMULATION METHOD TO CHECK
2. RE-REGISTER ECU COMMUNICATION ID
(a) Re-register the ECU communication ID .
NEXT -- Continue to next step.
3. CHECK DTC OUTPUT
(a) Delete the DTCs .
(b) Recheck for DTCs.
OK:
B2799/99 output does not recur.
NG -- CHECK CONNECTION OF CONNECTOR
OK -- END
4. CHECK CONNECTION OF CONNECTOR
(a) Turn the ignition switch OFF.
(b) Check that the connectors are properly connected to the ECM and the transponder key ECU.
OK:
Connectors are properly connected.
NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.
5. CHECK HARNESS OR CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - ECM)





(a) Disconnect the D33 ECU and A55 ECM connectors.
(b) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
6. REPLACE ECM
(a) Replace the ECM Removal.
NEXT -- Continue to next step.
7. ECU COMMUNICATION ID
(a) Register the ECU communication ID .
NEXT -- Continue to next step.
8. CHECK DTC OUTPUT
(a) Delete the DTCs .
(b) Recheck for DTCs.
OK:
B2799/99 output does not recur.
NG -- REPLACE TRANSPONDER KEY ECU ASSEMBLY
OK -- END