Heated/Vented Seat Switches

The driver and passenger heated and vented seats switches are located with the radio controls. The body control module (BCM) monitors each switch activation to determine whether heat or ventilation mode has been requested and to what level. With each press of the switch, the system will cycle through High, Medium, Low, and then back to Off again.

When a heated seat switch is pressed, a GMLAN serial data message is sent from the radio controls to the body control module (BCM) indicating the heated seat command. The BCM serves as the heated seat system master to determine the requested operating mode. The BCM then sends a LIN bus serial data message to the seat heating control module indicating the heated seat command. The BCM also controls the seat temperature and mode indicators, via the serial data line, used to provide the operator with feedback as to the operating status of the system.