Sahibn,
Can you please clarify your issues?

My AVN5435 did EXACTLY what you described. I had installed my unit three years ago, but recently it would act as if the car was moving, even when parked in my garage. Touch buttons would not work for the navi. Only emergency locations.

What I later found was a loose Parking Brake Signal wire. Might not be connected correctly to your parking brake switch. Since I couldnt find mine, I grounded mine.

Check the status of your unit and look at whether the Parking is "On" or "Off".

Or if you got this fixed, please advise me...