I have had this happen before and I just unpluged the usb from the Ipod nano,But this time I tried that and it still reads no usb data.Any Idea what the deal is I have to replug the usb while the car is on and off.I dont have navi 09 fit sport

 

Try resetting your iPod.

1. Toggle the Hold switch on and off. (Slide it to Hold, then turn it off again.)
2. Now press and hold the Menu and Select buttons until the Apple logo appears, which may take about 6 to 10 seconds. You may need to repeat this step.

 

I will give this a whirl
Thank you

 

Hit the Aux button on the radio. It toggles between the Aux input and the USB.