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Home >> Cadillac >> 2017 >> XT5 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Object Detection System And Pedestrian Protection System >> Diagnostic Information and Procedures >> DTC B127B: Rearview Camera Input Signal Circuit Performance - Missing Reference >> Circuit/System Description

Circuit/System Description

Ignition voltage is applied to the rearview camera and send the camera sends a video signal to the Human Machine Interface Control Module. If the Human Machine Interface Control Module does not see a signal from the camera it will set B127B 2B and display "Service Rear Vision System".

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