Interior Room Lamp Control Circuit

INTERIOR ROOM LAMP CONTROL CIRCUIT

Description

Controls the room lamp control circuit (ground side) to turn the room lamps ON and OFF.


Component Function Check


CAUTION:
Before performing the diagnosis, check that the following is normal.
- Battery saver output/power supply
- Front room/map lamp assembly bulbs
- Personal lamp bulbs

1. CHECK INTERIOR ROOM LAMP CONTROL FUNCTION

CONSULT
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 that each interior room lamp turn ON/OFF.

ON: Interior room lamp ON
OFF: Interior room lamp OFF

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


Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" Interior Room Lamp.

1. CHECK INTERIOR ROOM LAMP CONTROL OUTPUT

CONSULT
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 M21 terminal 136 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 harness connector M21, front room/map lamp harness connector R51.
3.Check continuity between BCM harness connector M21 terminal 136 and front room/map lamp assembly harness connector R51 terminal 7.





4.Reconnect the front room/map lamp assembly harness connector.
5.Check continuity between BCM harness connector M21 terminal 136 and personal lamp rear harness connector R50 terminal 3.





Is the inspection result normal?
YES- Check interior room lamps for an open. If NG, replace lamp in question. Refer to "Removal and Installation" Removal And Installation (front room/map lamp assembly) or refer to {LINK_TO_MANY:0000000008748318}{LINK_TO_MANY:0000000008748319}, "Removal and
Installation" (personal lamp rear). If OK, replace BCM. Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace harness or connectors.

3. CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect BCM harness connector M21and front room/map lamp harness connector R51 lamp harness.
3.Check continuity between BCM harness connector M21 terminal 136 and ground.





Is the inspection result normal?
YES- Check the interior room lamps for a short circuit. If NG, replace the interior room lamp. Refer to
"Removal and Installation" Removal And Installation (front room/map lamp assembly) or refer to "Removal and Installation" Removal And Installation (personal lamp rear). If OK, replace BCM. Refer to "Removal and Installation" Service and Repair
NO- Repair or replace the harness or connectors.