tbone

Any updates on this issue??? The switch on top of the unit is in the "off" position.

well the unit is using GPS to track your movement, and is accurate enough to know exactly how fast you are going.

Whoops ... sorry about that one ... I guess I didn't look at the obvious. I was thinking more mechanical.

I installed my U310BT about 2 weeks ago and have the same situation. While driving there are operations of the Navi system that are dimmed out and will not function but as I slow down and reach approx 5 mph they come to life. I have not wired the safety wire to anything at this point but after reading the info here I plan on trying the grounding trick. Not sure how the system knows (what it is monitoring) when I get down around 5 mph but the unit has done this from day one. Still trying to figure out the AVIC Feeds program I downloaded but not having much luck to this point ... but something to mess with.