Engine Immobiliser System (w/ Smart Key System) (w/ Smart Key System (w/ Smart Key System))

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

NOTE: 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 Immobilizer System (W/ Smart Key System)).
(b) Recheck for DTCs (Engine Immobilizer 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 (Removal) with a normal one, check that the engine starts.
OK:
The engine starts.
NG -- REPLACE CERTIFICATION ECU
OK -- END