B2784

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: B2784: Antenna Coil Open / Short

DTC B2784 - Antenna Coil Open / Short

DESCRIPTION

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






WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE: If the certification ECU is replaced, register the key and ECU communication ID .

PROCEDURE

1. CHECK DTC OUTPUT
(a) Delete the DTCs .
(b) Recheck for DTCs .
Result:






B -- USE SIMULATION METHOD TO CHECK
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - POWER 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. REPLACE POWER SWITCH
(a) Replace the power switch .
NEXT -- Continue to next step.
4. CHECK DTC OUTPUT
(a) Delete the DTCs .
(b) Recheck for DTCs .
Result:






B -- REPLACE CERTIFICATION ECU
A -- END