Diagnosis Procedure

ILLUMINATION CONTROL SIGNAL CIRCUIT


Diagnosis Procedure

1.CHECK ILLUMINATION CONTROL SIGNAL INPUT
1. Switch the lighting switch 1ST.
2. While operating the illumination control switch, check the voltage between the total illumination control unit harness connector and the ground.





Is the measurement value normal?
YES - Replace the total illumination control unit.
NO - GO TO 2.
2.CHECK ILLUMINATION CONTROL SIGNAL CIRCUIT FOR OPEN
1. Turn ignition switch OFF.
2. Disconnect the total illumination control unit connector and the combination meter connector.
3. Check continuity between the total illumination control unit harness connector and the combination meter harness connector.





Does continuity exist?
YES - GO TO 3.
NO - Repair the harnesses or connectors.
3.CHECK ILLUMINATION CONTROL SIGNAL SHORT CIRCUIT
1. Disconnect the selector lever position indicator connector.
2. Check continuity between the total illumination control unit harness connector and the ground.





Does continuity exist?
YES - Repair the harnesses or connectors.
NO - Replace the total illumination control unit.