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 ID code box; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the ID code box 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
NOTICE:
- If the ID code box is replaced, register the key and ECU communication ID Engine Immobilizer System.
- If the ECM is replaced, register the ECU communication ID Engine Immobilizer System.

PROCEDURE

1. CHECK DTC OUTPUT
(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result:

B -- USE SIMULATION METHOD TO CHECK
A -- Continue to next step.
2. RE-REGISTER ECU COMMUNICATION ID
(a) Re-register the ECU communication ID Engine Immobilizer System between the ID code box and ECM.
(b) Check that the engine starts.
OK:
The engine starts.
OK -- END
NG -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ID CODE BOX - ECM)

(a) Disconnect the E32 ID code box and A10 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.
4. REPLACE ECM
(a) Replace the ECM Removal.
NEXT -- Continue to next step.
5. ECU COMMUNICATION ID REGISTRATION
(a) Register the ECU communication ID between the ID code box and ECM Engine Immobilizer System.
NEXT -- Continue to next step.
6. CHECK DTC OUTPUT
(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result:

B -- END
A -- REPLACE ID CODE BOX