Ambient Lighting
The HVAC module controls the ambient lighting system. When requested, the HVAC module provides voltage and ground to the LEDs. There are 3 LEDs (Edge) (red, blue and green) or 4 LEDs (MKX) (red, blue, green and white) housed within each LED assembly. By illuminating various color combinations, the LEDs are able to produce 7 different colors of ambient light.
The HVAC module receives input from the Accessory Protocol Interface Module (APIM) and the Body Control Module (BCM) over the communication network for color and brightness settings.
The display interface in the center of the instrument panel is used to cycle through different color variations or turn the ambient lighting feature on or off. The APIM communicates messages over the High Speed Controller Area Network (HS-CAN) to the Body Control Module (BCM).
The BCM gateways the messages to the HVAC module over the Medium Speed Controller Area Network (MS-CAN). The HVAC module retains the last color and brightness setting between uses.