Control System Logic

The controls for the climate control system are in one or more locations depending on vehicle option content:

• Dual Automatic Temperature Control (DATC) module
• Front Display Interface Module (FDIM) (part of Accessory Protocol Interface Module (APIM))

When the Front Display Interface Module (FDIM) touchscreen or voice commands are used and A/C  is selected, the Accessory Protocol Interface Module (APIM) sends a function request message over the Infotainment Controller Are Network (I-CAN) to the Instrument Panel Cluster (IPC). The Instrument Panel Cluster (IPC) relays the requests to the Gateway Module (GWM), Body Control Module (BCM) and the Heating, Ventilation, and Air Conditioning (HVAC) module over the Medium Speed Controller Area Network (MS-CAN). The Gateway Module (GWM) sends the requests to the Powertrain Control Module (PCM) over the High Speed Controller Area Network (HS-CAN). The Powertrain Control Module (PCM) sends the request over the High Speed Controller Area Network (HS-CAN) to the Air Conditioning Control Module (ACCM).

When the customer inputs are directly inputted in to the Dual Automatic Temperature Control (DATC) module and A/C  is selected, the Heating, Ventilation, and Air Conditioning (HVAC) module sends the request to the Gateway Module (GWM) over the Medium Speed Controller Area Network (MS-CAN). The Gateway Module (GWM) sends the request to the Powertrain Control Module (PCM) over the High Speed Controller Area Network (HS-CAN). The Powertrain Control Module (PCM) sends the request over the High Speed Controller Area Network (HS-CAN) to the Air Conditioning Control Module (ACCM).