Control System Logic

All customer climate control requests for the EATC system are input through the climate control assembly (switches). The climate control assembly (switches) are hard wired to the HVAC control module. When the customer presses the A/C button on the HVAC controls, the HVAC control module sends the A/C request message over the MS-CAN to the GWM. The GWM sends the message to the PCM over the HS-CAN1. The PCM energizes the A/C clutch relay.