Interior Lighting

[1][2]Lighting Control Module
This vehicle uses a Lighting Control Module (LCM). This eliminates the electronic interference and heat associated with the thermo-electric devices used previously. The lighting control module is a microprocessor based module that controls several vehicle subsystems, responds to electrical input signals from various switches, sensors, and external modules and is located on the LH side of the instrument panel. LCM subsystem functions include:
^headlamps with autolamps.
^ turn signal lamps/hazard flasher lamps.
^ cornering lamps.
^ parking lamps.
^ daytime running lamps (Canada only).
^ courtesy lamps.
^ demand lamps.
^ battery saver.

The LCM interfaces with the Driver Door Module (DDM) via Standard Corporate Protocol (SCP) for illuminated entry.

Interior Lighting
The interior lighting system consists of interior lamps and the illuminated entry system. The interior lamps consist of the following:
^ dome lamps.
^ instrument panel.
^ dome/map combination.
^ courtesy/reading.
^ courtesy.
^ door.
^ foot.
^ luggage compartment.
^ glove compartment.
^ vanity mirrors.

The courtesy lamp is illuminated by pressing a button. The courtesy lamp is also illuminated by door ajar switches located in the door latches, when any door is opened.

The dome/map lamp combination are located on each side of the interior lamp. The map lamps are operated independently of the interior lamp by two switches located on the interior lamps.

The interior lamps are illuminated by holding the panel dim switch in the UP position until the dome lamps turn on. The interior lamp also illuminates when a door is opened and actuates the door ajar warning lamp switch in the door latch.

The front map lamps are powered by the demand lighting circuit and the courtesy lighting circuit.

The rear passenger reading lamps are incorporated into the rear seat assist handle and are located over the rear door openings. These lamps are illuminated through power supplied by the [1][2]lighting control module demand lighting circuit.

The courtesy lamps can be turned on by depressing the headlamp switch assembly or by opening any door. A theater lighting feature gradually increases or decreases the light intensity when switched by opening or closing a door.

Courtesy lamps (controlled by the [1][2]lighting control module) are activated by using the dome lamp switch (instant ON/OFF response) or when a door is ajar. The following lamps illuminate for courtesy lighting:
^ instrument panel courtesy lamps.
^ front map lamps.
^ rear reading lamps.
^ door lamps.

Demand lighting includes lamps that are illuminated by the customer by directly actuating a switch. The front dome/map lamps are located in the overhead console. Each lamp is controlled by its own switch.

The following demand lamps are powered by the demand lighting output of the [1][2]lighting control module:
^ glove compartment lamp.
^ vanity mirror lamp.
^ luggage compartment lamp.

Each lamp has a dedicated switch that closes to ground to illuminate the lamp.

The front map lamps are powered by either the demand lighting circuit or the courtesy lighting circuit, depending upon the position of the switch associated with each lamp. When the customer turns the front map lamp switch ON, the front map lamp is illuminated through power supplied by the [1][2]lighting control module demand lighting circuit. If the customer moves the map lamp switch to the OFF position, the power from the lighting control module demand lighting circuit is interrupted and the lamp is reconnected to the courtesy lighting circuit.

The rear reading lamps are powered by either the courtesy lighting circuit or the demand lighting circuit.

The luggage compartment lamp is controlled by the trunk ajar switch, and is powered by the demand lighting output from the [1][2]lighting control module, and is mounted near the center of the upper rear panel.

The glove compartment lamp system consists of a glove compartment lamp switch and wire and miniature bulb assembly. Opening the glove compartment door closes the switch which provides power to the glove compartment lamp switch and wire. The glove compartment lamp switch is grounded to the sheet metal.

The vanity mirror lamp system consists of a switch and bulb assembly in RH inside visor and LH inside visor. Lifting the vanity mirror cover closes the vanity mirror lamp switch and provides power to the lamps.

The illuminated entry system is controlled by the [1][2]lighting control module and provides courtesy lighting upon entry to the vehicle.

Courtesy lamps will be illuminated for 25 (±1) seconds which includes a theater lighting ramp-up time (two seconds). This time interval does not include the theater lighting ramp-down time. Courtesy lamps will be turned off before the 25 (±1) second timeout if the ignition switch is turned to the RUN or ACC position.

The illuminated entry system has the following additions to accommodate the remote entry system: pressing the unlock button on the remote transmitter will activate the illuminated entry system (with theater ramp-up). When the driver door module detects a button press, it sends a signal on the communication network activating the courtesy lamps.

The [1][2]lighting control module will turn off the lamps by sensing the all doors lock signal.

The battery saver feature prevents excessive drain from loads inadvertently left on. When the ignition switch is turned OFF, power is interrupted to the courtesy lamps and headlamps (after a 10-minute timeout) and the demand lamps (after a 30-minute timeout).
The battery saver has the following inputs:
^ luggage compartment door ajar switch.
^ dome lamp switch.
^ ignition switch status.
^ illuminated entry signal.
^ headlamp switch.
^ driver/passenger door ajar entry switch.
^ key less entry remote transmitter.
^ door unlock, luggage compartment door release.

The battery saver has the following outputs:
^ courtesy lamps.
^ headlamps.
^ demand lamps.

When the ignition switch is turned to OFF, the courtesy lamps interrupt timer, and demand lamps interrupt time, begin their timeout. The interrupt timer is a feature of the [1][2]lighting control module. Power is available to the courtesy, head, and demand lamps during timeout. At the end of the 10 (±1) minute timeout period, the lighting control module disables power to the head and courtesy lamps. At the end of the 30-minute timeout period, the lighting control module disables power to the demand lamps for courtesy lamps if dome switch is causing the courtesy lamps to be on, then timeout is 30 minutes. Turning the ignition switch to ACC or RUN will terminate the battery saver feature by disabling the interrupt timers and reinstating power to the lamps.

A reset event will set the courtesy lamps interrupt timer to zero. The reset events for the courtesy lamps and the demand lamps interrupt timer are as follows:
^ turning ON the courtesy lamps using the dome lamp switch.
^ opening any door (as detected by the door ajar lamp switches).
^ trunk ajar
^ any keyless entry transmitter button pressed.
^ headlamp switch change to park or headlamps on position.

When the panic button is pressed on a keyless entry transmitter, the panic alarm will override the courtesy lamps, demand lamps and headlamps battery saver functions for the necessary duration of the alarm.