I installed a rear view camera in my '06 Maxima. From the camera I connected black to ground and red to reverse lights(green/white wire in trunk). From the head unit I connected the purple/white(reverse camera wire) to the same green/white reverse lights wire, this one behind the drivers kick plate. The video cable from the camera was connected to the R.C. IN on the head unit(per the HU's instructions). So this is my problem; when I'm in reverse the camera comes on, everything's fine. When I'm in anything else the display will show the audio screen but after a few seconds it turns to a black screen and shows "Caution: Screen image may appear reversed." on it, audio is still playing. Touching the screen will change it back to whatever it was on but it will change back after a few seconds. So basically the function of the camera in reverse is right, but I doubt it's the rest is normal operation. Also to note, it seems like the reverse wire from the back of the head unit isn't doing anything (or isn't needed) as I tried out the camera before connecting it and it operated the exact same way. Any thoughts?

First you have the camera turned on in your pioneer settings. Turn the camera off in the settings and that will keep it from flipping back to camera when you touch the screen.

The reverse wire on the radio is to help with navigation if you were to add the u220 pioneer navigation module.

Even with the camera turned to the off setting it will still switch when reverse is triggered.

Thanks a lot! I was under the impression rear view had to be on. So I turned it off and changed polarity to battery and now it works as intended.

Glad it worked out.