Engine Immobilizer System (w/ Smart Key System)

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM (w/ Smart Key System): B2799: Engine Immobiliser System Malfunction
B2799 - Engine Immobiliser System Malfunction

DESCRIPTION

This DTC is stored 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 output. If output, troubleshoot the certification ECU DTCs first.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When the ID code box is replaced, refer to Registration Engine Immobilizer System (w/ Smart Key System).

PROCEDURE

1. CHECK CONNECTION OF CONNECTOR

(a) Turn the engine switch off.

(b) Check that the connectors are properly connected to the ECM and ID code box.

OK:

Connectors are properly connected.

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

2. CHECK HARNESS AND CONNECTOR (ID CODE BOX - ECM)

(a) Disconnect the F72 box connector.

(b) Disconnect the F50 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.

3. REGISTER RECOGNITION CODES

(a) Register the recognition codes in the ECUs Engine Immobilizer System (w/ Smart Key System).

NEXT -- Continue to next step.

4. REGISTER ECU COMMUNICATION ID

(a) Register the ECU communication ID Engine Immobilizer System (w/ Smart Key System).

NEXT -- Continue to next step.

5. CLEAR DTC

(a) Clear the DTCs Engine Immobilizer System (w/ Smart Key System).

NEXT -- Continue to next step.

6. CHECK FOR DTC

(a) Check for DTCs Engine Immobilizer System (w/ Smart Key System).

OK:

DTC B2799 is not output.

NG -- REPLACE ECM

OK -- END (ECU COMMUNICATION ID IS NOT REGISTERED CORRECTLY)

7. REPLACE ECM

(a) Temporarily replace the ECM with a new or normally functioning one Removal.

NEXT -- Continue to next step.

8. CLEAR DTC

(a) Clear the DTCs Engine Immobilizer System (w/ Smart Key System).

NEXT -- Continue to next step.

9. CHECK FOR DTC

(a) Check for DTCs Engine Immobilizer System (w/ Smart Key System).

OK:

DTC B2799 is not output.

NG -- REPLACE ID CODE BOX Removal

OK -- END (ECM IS DEFECTIVE)