I have a x5500bhs, just installed it in my Toyota Tundra and hooked it up to my factory installed back up camera.  So far it works great, exactly as planned, but after a few minutes it shuts off.  I was hoping it would work on demand at anytime which it kind of does, but shuts off after a short while then won't turn back on unless I put it back into reverse for a split second.  Is there a timer on it or anything?  Anything I can change?

 

Thanks!