Interior Room Lamp Control Circuit

INTERIOR ROOM LAMP CONTROL CIRCUIT





Description
Controls the following interior room lamps (ground side) by PWM signal
- Puddle lamps (if equipped)
- Front room/map lamp assembly
- Personal lamp 2nd row
- Personal lamp 3rd row

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




Component Function Check

CAUTION:
Before performing the diagnosis, check that the following is normal.
- Battery saver output/power supply
- Front room/map lamp bulbs
- Personal lamp bulbs
- Puddle lamp bulbs (if equipped)
1.CHECK INTERIOR ROOM LAMP CONTROL FUNCTION
CONSULT-III
1. Place the front room/map lamp assembly switch in the DOOR position.
2. Turn ignition switch ON.
3. Select "INT LAMP" of BCM (INT LAMP) active test item.
4. While operating the test item, check that each interior room lamp turns ON/OFF (gradual brightening/dimming).





Is the inspection result normal?
YES - Interior room lamp control circuit is normal.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
Regarding Wiring Diagram information, Interior Room Lamp Control System.
1.CHECK INTERIOR ROOM LAMP CONTROL OUTPUT
CONSULT-III





1. Switch the front room/map lamp assembly switch to DOOR.
2. Turn ignition switch ON.
3. Select "INT LAMP" of BCM (INT LAMP) active test item.
4. 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, door mirror connectors (if equipped with puddle lamps) and front room/map lamp assembly connector.
3. Check continuity between BCM connector M20 (A) terminal 63 and the door mirror connectors (B) terminal 13 and front room/map lamp assembly connector R102 (C) terminal 1.





4. Reconnect the front room/map lamp assembly connector.





5. Check continuity between BCM connector M20 (A) terminal 63
1. and the 2nd and 3rd row personal lamp connectors (B) terminal





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





1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, door mirror connectors (if equipped with puddle lamps) and 2nd and 3rd row personal lamp connectors.
3. Switch the front room/map lamp assembly switch to ON position.
4. Check continuity between BCM connector M20 terminal 63 and ground.






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