Engine Immobiliser System (W/ Smart Key System)

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM (w/ Smart Key System): B2784: Antenna Coil Open / Short

DTC B2784 - Antenna Coil Open / Short

DESCRIPTION

This DTC is output when there is an open or short malfunction in the key coil (built into engine switch).






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTICE: If the certification ECU 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 - ENGINE SWITCH)




(a) Disconnect the E58 ECU and E52 switch 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 ENGINE SWITCH
(a) After replacing the engine switch with a normal one, check that the engine starts.
OK:
The engine starts.
NG -- REPLACE CERTIFICATION ECU
OK -- END