Principles of Operation: Notes

The Body Control Module (BCM) controls various systems by monitoring inputs from switches, sensors and messages sent from other modules. The BCM  activates outputs based on the inputs received. For example, the Front Lighting Control Module (FLM) monitors the headlamp switch and transmits the headlamp switch position to the BCM  over the network. Based on this input, the BCM  may provide voltage to the exterior lamps.