Engine Immobiliser System (W/ Smart Key System)

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM (w/ Smart Key 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 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 Immobiliser System (W/ Smart Key System).
- If the ECM is replaced, register the ECU communication ID Engine Immobiliser System (W/ Smart Key System).

PROCEDURE

1. CHECK DTC OUTPUT
(a) Delete the DTCs Engine Immobiliser System (w/ Smart Key System).
(b) Recheck for DTCs Engine Immobiliser System (w/ Smart Key System).
Result:






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




(a) Disconnect the E50 ID code box and A55 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. CHECK ECM
(a) After replacing the ECM Removal with a normal one, check for DTCs Engine Immobiliser System (W/ Smart Key System).
Result:






A -- REPLACE ID CODE BOX
B -- END