Infotainment Display/ Faceplate controls

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

The Infotainment Display and Faceplate controls are a separate component from the Radio combined into one assembly. The Assembly contains the control knobs and buttons for all Audio, HVAC, Navigation, and Display functions. The assembly is supplied battery voltage and ground from the vehicle harness.

Control information, touch communications and dimming level for the display are communicated via a LIN serial data circuit to the Human Machine Interface and Navigation Control Modules.

The Human Machine Interface and Navigation Control Modules send the display digital video data for on-screen display through dedicated video cables.

The knob and button controls communicate via a LIN serial data circuit with the Radio. Messages communicated include the following:

Wake-up/power states messages
Diagnostic information
Button presses/knob rotations
Commands for the state of indicators
Back-Lighting dimming level