Engine Immobiliser System (for Hatchback) (from 07/2011)

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM (for Hatchback): B2780: Push Switch / Key Unlock Warning Switch Malfunction
B2780 - Push Switch / Key Unlock Warning Switch Malfunction

DESCRIPTION

This DTC is stored if the transponder key ECU assembly does not detect that the unlock warning switch assembly is on even when the ignition switch is ON. Under normal conditions, the unlock warning switch assembly is on when the ignition switch is ON.





* *: Only output while a malfunction is present.

Vehicle Condition and Fail-safe Operation when Malfunction Detected





Related Data List and Active Test





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* When replacing the transponder key ECU assembly, refer to the Registration Engine Immobiliser System (for Hatchback).
* After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

PROCEDURE

1. CLEAR DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

2. CHECK FOR DTC

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

HINT
Before checking for DTCs, perform the "DTC Output Confirmation Operation" procedure.

OK:

DTC B2780 is not output.

NG -- INSPECT UNLOCK WARNING SWITCH ASSEMBLY

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

3. INSPECT UNLOCK WARNING SWITCH ASSEMBLY

(a) Inspect the unlock warning switch assembly Testing and Inspection.

NG -- REPLACE UNLOCK WARNING SWITCH ASSEMBLY Removal (from 07/2011)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (UNLOCK WARNING SWITCH ASSEMBLY - TRANSPONDER KEY ECU ASSEMBLY AND BODY GROUND)

(a) Disconnect the D111 unlock warning switch assembly connector.

(b) Disconnect the D139 transponder key ECU assembly connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE TRANSPONDER KEY ECU ASSEMBLY Removal (from 07/2011)