Diagnosis Procedure

INTERIOR ROOM LAMP CONTROL CIRCUIT


Description

Controls each interior room lamp (ground side) by PWM signal.

NOTE:
PWM signal control period is approximately 250 Hz (in the gradual brightening/dimming).




INTERIOR ROOM LAMP CONTROL CIRCUIT


Diagnosis Procedure

1.CHECK INTERIOR ROOM LAMP CONTROL OUTPUT
CONSULT-III ACTIVE TEST
1. Turn ignition switch OFF.
2. Remove all the bulbs of map lamp, foot lamp and personal lamp.
3. Select "INT LAMP" of BCM (INT LAMP) active test item.
4. With operating the test item, check continuity between BCM harness connector and ground.





Is the measurement value normal?
YES - GO TO 2.
Fixed ON-GO TO 3.
Fixed OFF-Replace BCM.
2.CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector, roof module connector and foot lamp connector.
3. Check continuity between BCM harness connector, roof module harness connector, and foot lamp harness connector.





Does continuity exist?
YES - Replace the roof module or the foot lamp.
NO - Repair the harnesses or connectors.
3.CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector, roof module connector and foot lamp connector.
3. Check continuity between BCM harness connector and ground.





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