Engine Immobiliser System (w/o Smart Key System)

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

DTC B2784 - Antenna Coil Open / Short

DESCRIPTION

This DTC is detected when a transponder key coil (antenna coil) is open/shorted.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (TRANSPONDER KEY COIL)
(a) Check the Data List for proper functioning of the transponder key coil.

Transponder Key ECU:





OK:
NORMAL (transponder key coil is normal) appears on screen.
OK -- REPLACE TRANSPONDER KEY ECU
NG -- Continue to next step.

2. CHECK WIRE HARNESS (TRANSPONDER KEY ECU - KEY SLOT)




(a) Disconnect the T5 ECU connector.
(b) Disconnect the K3 key slot connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE KEY SLOT