Ambient Lighting
The ambient lighting subsystem consists of the Body Control Module B (BCMB), and the Light Emitting Diodes (LEDs) located within the floor console (cup holders), front door panels (interior door release handles), front footwell areas, the scuff plate trim panels and the IPC. The message center switch is used to cycle the Light Emitting Diodes (LEDs) through 132 different color combinations (7 preset colors or 125 colors created through the MyColor™ feature) or to turn the ambient lighting off. The Body Control Module B (BCMB) provides the necessary voltage to all the Light Emitting Diodes (LEDs) to illuminate the 2 different zones.
Based on the ambient lighting system selections made using the IPC message center, the IPC sends ambient light color request and ambient light intensity request messages over the HS-CAN3 to the GWM, then to the Body Control Module B (BCMB) through the MS-CAN for color and brightness settings.
The ambient lighting is split up into 2 separate zones, zone 1 and zone 3. Zone 2 is not used. Zone 1 consists of the front footwells, interior door release handles and the cup holders. Zone 3 consists of the scuff plate trim panels. Both zones share an ambient lighting LED ground circuit. Ground is provided by the Body Control Module B (BCMB).
When a door is opened, the Body Control Module B (BCMB) turns on both zones of the ambient lighting system. Zone 3 (door scuff plate Light Emitting Diodes (LEDs)) are turned off when any door is closed, or the illuminated entry request is detected by the Body Control Module B (BCMB). The zone is turned off at the same time as the courtesy lighting by the Body Control Module B (BCMB) if the key is not activated in the ignition switch. The ambient lighting is reactivated when until the parking lamps are turned on or the ignition is in ON.