Principles of Operation: Notes

The Body Control Module B (BCM-B) controls various systems by monitoring inputs from switches, sensors and messages sent from other modules on the Medium Speed Controller Area Network (MS-CAN). Based on the inputs received, the BCM-B  activates outputs. For example, the BCM-B  monitors the stoplamp switch and messages received from the Smart Junction Box (SJB) regarding ignition state and door ajar status. Based on this input, the BCM-B  may provide voltage to the stoplamps or activate the ambient lighting.