B2789

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM (w/ Smart Key System): B2789: No Response from ID BOX
B2789 - No Response from ID BOX

DESCRIPTION

This DTC is output when the certification ECU does not receive LIN communication from the ID code box for 10 seconds.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
If the certification ECU or ID code box is replaced, register the key and 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. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ID CODE BOX)

(a) Disconnect the E58 ECU and E50 ID code box 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.

3. CHECK CERTIFICATION ECU

(a) After replacing the certification ECU with a normal one, check for DTCs Engine Immobiliser System (w/ Smart Key System).

Result:





B -- END

A -- REPLACE ID CODE BOX