Front Display Interface Module (FDIM)
WARNING: This page is about a different car, the 2014 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The controls and indicators for the heated steering wheel system are located in the FDIM (touchscreen) only. The FDIM can be serviced separately. The FDIM does not communicate on any network and is connected directly to the APIM .