Steering Wheel Controls
WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
The steering wheel controls are mounted directly to the steering wheel and wired to the Steering Column Control Module (SCCM). Depending on what features the vehicle is equipped with, the SCCM sends messages via the High Speed Controller Area Network (HS-CAN) to the PCM (cruise control) and the Instrument Panel Cluster (IPC) (message center and entertainment system). The IPC receives the SCCM entertainment system messages via the HS-CAN and then sends them to the applicable entertainment system module(s) along the Infotainment Controller Area Network (I-CAN).