Thanks guys for all the views. I finally got in contact with Pioneer customer service. Problem solved. The answer is: All new 2013 model radios avh-x is not compatiable with the AVIC U220. Even though Pioneer has a substantial error in the user manual -- at page 46 it plainly indicates that the AVIC-U220 add-on GPS unit can be used with this head unit. The new model is the AVIC U250.