B2784

ENGINE IMMOBILIZER: ENGINE IMMOBILIZER 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 the engine switch).






WIRING DIAGRAM





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

PROCEDURE

1. CHECK DTC OUTPUT
(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Recheck for DTCs Reading and Clearing Diagnostic Trouble Codes.
Result:






B -- USE SIMULATION METHOD TO CHECK
A -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - ENGINE SWITCH)




(a) Disconnect the E13 ECU and E68 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