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 detected errors in its own communications with the immobiliser code ECU; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the immobiliser code ECU and ECM is different and an engine start is attempted. Before troubleshooting for this DTC, make sure no certification ECU DTCs are present. If present, troubleshoot the certification ECU DTCs first.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT

(a) Delete the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Recheck for DTC.

OK:

B2799 output does not reoccur

NG -- ECU COMMUNICATION ID REGISTRATION

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

2. ECU COMMUNICATION ID REGISTRATION

(a) Re-register the ECU communication ID between the immobiliser code ECU and ECM Programming and Relearning.

NEXT -- Continue to next step.

3. CHECK DTC OUTPUT

(a) Delete the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Recheck for DTC.

OK:

B2799 output does not reoccur

NG -- CHECK CONNECTION OF CONNECTOR

OK -- END

4. CHECK CONNECTION OF CONNECTOR

(a) Turn the engine switch off.

(b) Check that the connectors are properly connected to the ECM and the immobiliser code ECU

OK:

Connectors are properly connected.

NG -- CONNECT CONNECTORS PROPERLY
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (IMMOBILISER CODE ECU - ECM)

(a) for 2GR-FSE:

(1) Disconnect the K58 ECU and A7 ECM connectors.





(2) Measure the resistance according to the value(s) in the table below.

Standard resistance:





(b) for 1UR-FSE:

(1) Disconnect the K58 ECU and A7 ECM connectors.





(2) 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.

6. REPLACE ECM

(a) Replace the ECM Removalfor 2GR-FSE, Removal for 1UR-FSE).

NEXT -- Continue to next step.

7. ECU COMMUNICATION ID REGISTRATION

(a) Register the ECU communication ID between the immobiliser code ECU and ECM Programming and Relearning.

NEXT -- Continue to next step.

8. CHECK DTC OUTPUT

(a) Delete the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Recheck for DTC.

OK:

B2799 output does not reoccur

NG -- REPLACE IMMOBILIZER CODE ECU

OK -- END