Interior Lighting System: Overview Nissan Maxima A35

Scheme 1

System Description

OUTLINE

1. Interior room lamps* are controlled by interior room lamp timer control function of BCM. *:Front room/map lamp assembly, foot lamps and rear personal lamps (when front room/map lamp assembly switch is in DOOR position).
2. Trunk room lamp is controlled by trunk room lamp control function of BCM.
3. Step lamps are controlled by step lamp control function of BCM.

Scheme 2

SWITCH OPERATION

When a door is opened, the door switch closes to send a ground signal to the BCM. When the trunk is opened, the trunk lamp switch and trunk release solenoid closes sending a ground signal to the BCM.

ROOM LAMP TIMER OPERATION

When the front room/map lamp assembly switch is in DOOR position and when all conditions below are met, BCM begins timer control (maximum 30 seconds) for interior room lamp ON/OFF.

1. When the front door LH is unlocked [with Intelligent Key, main power window and door lock/unlock switch, power window and door lock/unlock switch RH, or front door lock assembly (key cylinder switch)].
2. When a door opens --> closes and the Intelligent Key is not inserted in the key slot. Timer control is cancelled under the following conditions.
3. When the front door LH is locked [with Intelligent Key, main power window and door lock/unlock switch, power window and door lock/unlock switch RH, or front door lock assembly (key cylinder switch)].
4. A door is opened (door switch turns ON).
5. Intelligent Key is inserted into the key slot. Interior lamp operational settings can be changed with the function setting of CONSULT-III.

The illumination lamps operation is dependent upon the position of the lighting switch (combination switch). When the lighting switch is placed in the 1ST or 2ND position (or if the auto light system is activated) the BCM (body control module) receives input requesting the illumination lamps to illuminate. This input is communicated to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The CPU (central processing unit) of the IPDM E/R controls the tail lamp relay coil. When energized, this relay directs power to the illumination lamps, which then illuminate.

Scheme 3

ILLUMINATION OPERATION BY LIGHTING SWITCH

With the lighting switch in the 1ST or 2ND position (or if the auto light system is activated), the BCM receives input requesting the illumination lamps to illuminate. This input is communicated to the IPDM E/R across the CAN communication lines. The CPU of the IPDM E/R controls the tail lamp relay coil which, when energized, directs power

Description

Provides the interior room lamp power supply. Also cuts the power supply when the interior room lamp battery saver is activated.

Controls each interior room lamp (ground side) by PWM signal.

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

Controls the step lamp (ground side) to turn the step lamp ON and OFF.

Controls the trunk room lamp (ground side) to turn the trunk room lamp ON and OFF.

Provides the power supply and the ground to control the push-button ignition switch illumination.