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Home >> GMC >> 2018 >> Terrain SL >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Image Display Camera System >> Diagnostic Information And Procedures >> DTC B127B: Rearview Camera Input Signal Circuit (IO5/IO6 Without MAH/MBC) >> Circuit/System Description

Circuit/System Description

Ignition voltage and ground are supplied to the Rearview Camera. When the transmission is placed into R, a signal is sent to the K74 Human Machine Interface Control Module indicating that camera operation is requested. The Rearview Camera sends video image to the K74 Human Machine Interface Control Module through a video signal + and a video signal - circuit. The K74 Human Machine Interface Control Module then sends the video signal via digital LVDS circuits (USB cable) to the P17 Info Display Module to be displayed.