This issue is puzzling and I haven't been able to find anywhere what the problem may be. I got the unit 'professionally' installed and the guy told me that he didn't know what the issue was.
Basically, the camera would only work if I am listening to FM Radio. If I am listening to XM, AM radio, a CD, or the Library, the screen would just be all black. It looks like it tries to connect to the camera because it goes to the camera mode and it shows the CAUTION message but it is pitch black. On the other hand, the camera works perfectly if listening to FM radio. This applies to the split screen (map and camera) and when backing up.
Obviously, I went back to the store and ask them to fix this issue (right now, it virtually is like not having a camera at all since I don't listen to FM and I am not going to switch the audio mode when I back up). I am going to take my car to a different location and see if anybody more knowledgeable knows what the issue is. Has anybody heard about this issue? Any help would be appreciated!! Thanks!