Control System Logic

WARNING: This page is about a different car, the 2015 Ford C-Max. However, it is still accessible from the selected car via links, so may be relevant.

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 MS-CAN. The GWM sends the requests to the SOBDMC over the HEV HS-CAN. When all conditions are met, the SOBDMC sends the request over the HEV 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 MS-CAN. The GWM sends the requests to the SOBDMC over the HEV HS-CAN.

When all conditions are met, the SOBDMC sends the request over the HEV HS-CAN to the ACCM.

The HVAC control module requires PMI when it is replaced.