B2799

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM: B2799: Engine Immobiliser System Malfunction

DTC B2799 - Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is output when one of the following occurs: 1) the ECM detects errors in its own communications with the transponder key ECU; 2) the ECM detects errors in the communication lines; or 3) the ECU communication ID between the transponder key ECU and ECM is different and an engine start is attempted. Before troubleshooting for this DTC, make sure no transponder key ECU DTCs are present. If present, troubleshoot the transponder key ECU DTCs first.






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE:
- If the transponder key ECU assembly is replaced, register the key and ECU communication ID Engine Immobiliser System.
- If the ECM is replaced, register the ECU communication ID Engine Immobiliser System.

PROCEDURE

1. CHECK DTC OUTPUT
(a) Clear the DTCs Engine Immobiliser System.
(b) Recheck for DTCs.
OK:
DTC B2799 output does not reoccur.
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 between the transponder key ECU assembly and ECM Engine Immobiliser System.
NEXT -- Continue to next step.

3. CHECK DTC OUTPUT
(a) Clear the DTCs Engine Immobiliser System.
(b) Recheck for DTCs.
OK:
DTC B2799 output does not reoccur.
NG -- CHECK CONNECTION OF CONNECTOR
OK -- END (PROBLEM WITH ECU COMMUNICATION ID)
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 AND CONNECTOR (TRANSPONDER KEY ECU - ECM)
(a) Disconnect the transponder key ECU assembly connector.
(b) Disconnect the ECM connector.




(c) 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.
Removal for 2ZR-FE)
Removal for 2AZ-FE)
NEXT -- Continue to next step.

7. REGISTER ECU COMMUNICATION ID
(a) Register the ECU communication ID between the transponder key ECU assembly and ECM Engine Immobiliser System.
NEXT -- Continue to next step.

8. CHECK DTC OUTPUT
(a) Clear the DTCs Engine Immobiliser System.
(b) Recheck for DTCs.
OK:
DTC B2799 output does not reoccur.
NG -- REPLACE TRANSPONDER KEY ECU ASSEMBLY
OK -- END (ECM IS DEFECTIVE)