Circuit/System Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 GMC Yukon XL, 2015 GMC Yukon, 2015 Chevrolet Tahoe, 2015 Chevrolet Suburban, and 2015 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
When the engine running and the transmission is placed into R, a serial data message is sent to the Human Machine Interface Control Module and to the Video Processing Control Module indicating that camera operation is requested. Battery voltage, serial data, and ground are supplied to the video processing control module, and receives inputs from cameras attached to it. The Video Processing Control Module sends video information to the Human Machine Interface Control Module through a video signal + and a video signal - circuit. A grounded shielding also wraps the video signal circuits to reduce electronic interference which may degrade the video signal and cause a distorted or otherwise degraded image.