Interior Room Lamp Control Circuit

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).


Component Function Check


CAUTION:
Before performing the diagnosis, check that the following are normal.
- Interior room lamp power supply
- Map lamp bulb

1. CHECK INTERIOR ROOM LAMP CONTROL FUNCTION

CONSULT ACTIVE TEST
1.Switch the map lamp switch to DOOR.
2.Turn ignition switch ON.
3.Select "INT LAMP" of BCM (INT LAMP) active test item.
4.With operating the test items, check that each interior room lamp turns ON/OFF (gradual brightening/dimming).

On: Interior room lamp gradual brightening
Off: Interior room lamp gradual dimming

Does the interior room lamp turns ON/OFF (gradual brightening/dimming)?
YES- Interior room lamp control circuit is normal.
NO- .


Diagnosis Procedure


1. CHECK INTERIOR ROOM LAMP CONTROL OUTPUT

CONSULT ACTIVE TEST
1.Turn ignition switch OFF.
2.Remove all the bulbs of map lamp.
3.Turn ignition switch ON.
4.Select "INT LAMP" of BCM (INT LAMP) active test item.
5. With operating the test item, check continuity between BCM harness connector and ground.
With Intelligent Key





Without Intelligent Key





Is the inspection result normal?
YES- GO TO 2.
Fixed ON-GO TO 3.
Fixed OFF-Replace BCM. With Intelligent Key System.

2. CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect BCM connector, map lamp connector.
3.Check continuity between BCM harness connector and map lamp harness connector.
With Intelligent Key





Without Intelligent Key





Is the inspection result normal?
YES- Replace map lamp.Removal And Installation.
NO- Repair or replace harnesses.

3. CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect BCM connector and map lamp connector.
3.Check continuity between BCM harness connector and ground.
With Intelligent Key





Without Intelligent Key





Is the inspection result normal?
YES- Replace BCM. With Intelligent Key System.
NO- Repair or replace harnesses.