Combination Switch Input Circuit

COMBINATION SWITCH INPUT CIRCUIT

Diagnosis Procedure


1. CHECK INPUT 1 - 5 CIRCUIT FOR OPEN

1.Turn power switch OFF.
2.Disconnect BCM and combination switch connectors.
3.Check continuity between BCM harness connector and combination switch harness connector.





Does continuity exist?
YES- GO TO 2.
NO- Repair harnesses or connectors.

2. CHECK INPUT 1 - 5 CIRCUIT FOR SHORT

Check for continuity between BCM harness connector and ground.





Does continuity exist?
YES- Repair harnesses or connectors.
NO- GO TO 3.

3. CHECK BCM INPUT SIGNAL

1.Connect BCM and combination switch connectors.
2.Turn ON any switch in the system that is malfunction.
3.Check voltage between BCM harness connector and ground.





Is the measurement value normal?
Yes- Replace BCM. Refer to "Removal and Installation" Service and Repair.
No- Replace combination switch.