I have some high pitch alternator noise, so I went to ground the d3 to the chassis today.

 

The alternator noise isnt as loud as before but still there. However, when I look at my speed sensor, it said the function is not available. Also, the gps is about 1 block off my actual position.

 

everytime when I start my car, it will tell me something about storefront mode and how the gps will work according to my current position or something.

 

Does anyone know what is wrong? I checked the GPS antenna status at "Connection Status", it seems perfectly fine.