Input Circuit Check

Combination Switch Input Circuit Check

Diagnosis Procedure

Regarding Wiring Diagram information, refer to [BCM: Wiring Diagram] [1][2]Body Control Module.

1. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN

1 Turn ignition switch OFF.





2 Disconnect BCM and combination switch.
3 Check continuity between BCM harness connector and combination switch harness connector.






Does continuity exist?
YES
GO TO 2
NO
Repair or replace harness.

2. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR SHORT

Check for continuity between BCM harness connector and ground.











Does continuity exist?
YES
Repair or replace harness.
NO
GO TO 3

3. CHECK BCM OUTPUT VOLTAGE

1 Connect BCM.





2 Turn ignition switch ON.
3 Check voltage between BCM harness connector and ground.






Is the measurement value normal?
YES
GO TO 4
NO
Replace BCM. Refer to [BCM: Removal and Installation].

4. CHECK COMBINATION SWITCH

Check combination switch. Refer to [Combination Switch Circuit Check] Circuit Check.

Is the check result normal?
YES
Replace BCM. Refer to [BCM: Removal and Installation].
NO
Replace the combination switch (applicable parts). Refer to [Lighting & Turn Signal Switch: Removal and Installation].

Special Repair Requirement

1. SAVING VEHICLE SPECIFICATION

Perform "READ CONFIGURATION" with SDT to save or print current vehicle specification.


GO TO 2

2. Replace BCM

Replace BCM. Refer to [BCM: Removal and Installation] Removal and Replacement.


GO TO 3

3. WRITING VEHICLE SPECIFICATION

Perform "WRITE CONFIGURATION - Config file" or "WRITE CONFIGURATION - Manual selection" with SDT to write vehicle specification. Refer to [Body Control System: Configuration] Testing and Inspection.


GO TO 4

4. INITIALIZE BCM (IMMOBILIZER SYSTEM)

Perform BCM initialization. Refer to [Additional Service When Replacing Control Unit] Procedures.


Work End.