Control System Logic

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

• HVAC  control module (Dual Automatic Temperature Control (DATC) system)
• FDIM  (part of APIM  )

When the FDIM  touchscreen or voice commands are used and A/C  is selected, the APIM  sends a function request message over the Infotainment Controller Area Network (I-CAN) to the IPC  . The IPC  relays the requests to the GWM  , BCM  and the HVAC  control module over the Medium Speed Controller Area Network (MS-CAN). The GWM  sends the requests to the PCM  over the High Speed Controller Area Network (HS-CAN). The PCM  sends the request over the High Speed Controller Area Network (HS-CAN) to the ACCM  .

When the customer directly inputs an A/C  request into the HVAC  control module, the module sends the request to the GWM  over the Medium Speed Controller Area Network (MS-CAN). The GWM  sends the request to the PCM  over the High Speed Controller Area Network (HS-CAN). The PCM  sends the request over the High Speed Controller Area Network (HS-CAN) to the ACCM  .

The HVAC  control module requires Programmable Module Installation (PMI) when it is replaced.