HVAC Control Module - EATC

The EATC system uses the HVAC control module, and it also controls the outputs for rear window defrost and climate-controlled seats. For details on the HVAC control module communication, refer to Control System Logic in this information.

The HVAC control module utilizes a FET protective circuit strategy for its actuator outputs. Output load (current level) is monitored for excessive current (typically short circuits) and is shut down (turns off the voltage or ground provided by the module) when a fault event is detected. A short circuit DTC is stored at the fault event and a cumulative counter is started.