Front Controls Interface Module (FCIM)
WARNING: This page is about a different car, the 2012 Ford Flex. However, it is still accessible from the selected car via links, so may be relevant.
The Front Controls Interface Module (FCIM) acts as a customer interface with the audio system and the climate control system. All of the switches on the panel are part of the FCIM, so it is necessary for the module to broadcast messages over the MS-CAN when any switch (audio, climate control, etc.) is pressed. When a climate control switch is pressed, the HVAC module broadcasts a message back to the FCIM to illuminate the correct switches to indicate the status of the climate control.