Diagnosis Procedure

COMBINATION SWITCH INPUT CIRCUIT


Diagnosis Procedure

Regarding Wiring Diagram information, Electrical Diagrams.
1. CHECK INPUT 1 - 5 SYSTEM CIRCUIT FOR OPEN





1. Turn the ignition switch OFF.
2. Disconnect the 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 the BCM.
2. Check voltage between BCM harness connector and ground.





Is the measurement normal?
YES - GO TO 4
NO - Replace BCM. Body Control System.
4. CHECK BCM INPUT SIGNAL





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






Is the measurement normal when any of the switches is turned ON?
YES - Replace BCM. Body Control System.
NO - Replace the combination switch. Service and Repair.