Automatic Temperature Control Module

The ATC module is mounted on the end of the blower motor casing, behind the instrument panel. The ATC module processes inputs from the TSD, the control switches located below the TSD, and the system sensors. In response to these inputs, the ATC module outputs control signals to the A/C system and the heating and ventilation system.

In addition to controlling the A/C system and the heating and ventilation system, the ATC module also controls the following:

• The seat heaters.

  For additional information, refer to: Seats (Description and Operation).

• The rear window heater.

  For additional information, refer to: Glass, Frames and Mechanisms (Description and Operation).

• The windshield heater.

  For additional information, refer to: Glass, Frames and Mechanisms (Description and Operation).

• The exterior mirror heaters.

  For additional information, refer to: Rear View Mirrors (Description and Operation).

• The steering wheel heater (if fitted).

Two electrical connectors provide the interface between the ATC module, and the vehicle wiring. The ATC module uses hardwired inputs from the system sensors, the LIN (local interconnect network) bus to communicate with the stepper motors and the medium speed CAN (controller area network) bus to communicate with other control modules on the vehicle.