Radio Faceplate
WARNING: This page is about a different car, the 2013 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The Radio Faceplate is a separate component from the radio. The faceplate contains the radio control knobs and buttons for all audio functions. In addition, the HVAC head controls are part of the faceplate. The faceplate communicates with the radio through serial data and directly connects to the radio. When the operator rotates a radio knob to change radio stations or increase the volume a message is sent to the radio over serial data. After receiving the message the radio will make the adjustment. Other messages communicated between the radio and the faceplate includes the following:
- The content for the monochrome display
- Button presses / knob rotations
- Commands for the state of indicators