Diagnosis Procedure

INTERIOR ROOM LAMP CONTROL CIRCUIT


Description

Controls the following interior room lamps (ground side) by PWM signal
- Front room/map lamp assembly (if equipped)
- Room lamp 2nd row

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





INTERIOR ROOM LAMP CONTROL CIRCUIT


Diagnosis Procedure

Regarding Wiring Diagram information, Interior Room Lamp Control System.
1.CHECK INTERIOR ROOM LAMP CONTROL OUTPUT
CONSULT-III
1. Turn ignition switch ON.
2. Select "INT LAMP" of BCM (INT LAMP) active test item.





3. While operating the test item, check voltage between BCM connector M20 terminal 63 and ground.





Is the inspection result normal?
YES - Interior room lamp control circuit is operating normally.
Fixed ON-GO TO 3
Fixed OFF- GO TO 2
2.CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, room lamp 2nd row connector and front room/map lamp connector.
3. Check continuity between BCM connector M20 terminal 63 and interior room lamp connectors.





Is the inspection result normal?
YES - Check interior room lamp for an open. If OK, replace the
BCM. Service and Repair. If
NG, replace the interior room lamp. Service and Repair.
NO - Repair the harness or connectors.
3.CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, room lamp 2nd row connector and front room/map lamp connector.
3. Check continuity between BCM connector and ground.





Is the inspection result normal?
YES - Check interior room lamp for a short circuit. If OK, replace the BCM. Service and Repair. If NG, replace the interior room lamp Service and Repair.
NO - Repair the harness or connectors.