Combination Switch Input Circuit

COMBINATION SWITCH INPUT CIRCUIT





Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Body Control Systems.
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 (A) and combination switch harness connector (B).





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. Service and Repair.
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 are turned ON?
YES - Replace BCM. Service and Repair.
NO - Replace the combination switch. Service and Repair.




Special Repair Requirement
1. REQUIRED WORK WHEN REPLACING BCM
Initialize control unit. Refer to CONSULT-III operation manual.
- Work End.