GroundLoop wrote:I agree. I haven't dug into the pinouts in the service manual yet, but there might be a signal to the head unit that the car is in "Park", much like the one for Reverse. Hopefully that's not moved to CANbus.
There might be a wheel rotation signal that can be interrupted as well -- effectively making the nav think the car has stopped, until GPS convinces it otherwise.
It is definitely not related to Park. It becomes enabled when you stop at a traffic light, and then disables again once you start moving. Not sure how the motion signal gets to the unit, but it is definitely motion related not gear selector/Park.