Nissan Maxima Service and Repair Manual: 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 is normal.

• Battery saver output/power supply
• Front room/map lamp assembly bulbs
• Personal lamp rear bulbs
• Foot lamp bulbs

1.CHECK INTERIOR ROOM LAMP CONTROL FUNCTION

CONSULT

1. Switch the front room/map lamp assembly 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 turns ON/OFF (gradual brightening/dimming).

ON : Interior room lamp gradual brightening
OFF : Interior room lamp gradual dimming

Diagnosis Procedure

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 M17 terminal 19 and ground.

2.CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect BCM connector M17, front room/map lamp assembly and foot lamp connectors.
3. Check continuity between BCM connector M17 terminal 19 and each interior room lamp connector.

3.CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT

1. Turn ignition switch OFF.
2. Disconnect BCM connector M17, front room/map lamp assembly and foot lamp connectors.
3. Check continuity between BCM connector M17 terminal 19 and ground.