Normal Operation

When the ignition is on, the video camera receives voltage through BCM  fuse 34 (10A). When the gear selector in reverse, the Accessory Protocol Interface Module (APIM) receives the reverse signal from the Body Control Module (BCM) over the Medium Speed Controller Area Network (MS-CAN), enabling the rear video image display. The video camera also receives the reverse signal message from BCM  over the Local Interconnect Network (LIN). The LIN  is a dedicated single wire communication line that carries messages between the BCM  and the video camera. A pair of shielded wires carries the video signal from the video camera to the APIM  .

• DTC B115E:08 (Camera Module: Bus Signal/Message Failure) - an on-demand DTC that sets in the BCM  when there is a LIN  communication fault from the video camera.
• DTC C1001:01 (Vision System Camera: General Electrical Failure) - a continuous DTC that sets in the APIM  when no video signal is detected from the video camera when the vehicle is in reverse.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• Fuse
• Video camera
• APIM 
• BCM