Diagnosis Procedure

ROOM LAMP REQUEST SIGNAL CIRCUIT


Diagnosis Procedure

1.CHECK ROOM LAMP TIMER SIGNAL INPUT
CONSULT-III ACTIVE TEST
1. Turn ignition switch ON.
2. Select "INT LAMP" of BCM (INT LAMP) active test item.
3. While operating the test items, check voltage between total illumination control unit harness connector and ground.





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





Does continuity exist?
YES - GO TO 3.
NO - Repair the harnesses or connectors.
3.CHECK ROOM LAMP TIMER SIGNAL FOR SHORT
Check continuity between the total illumination control unit harness connector and ground.





Does continuity exist?
YES - Repair the harnesses or connectors.
NO - Replace the BCM.