http://www.pioneerelectronics.com/PUSA/ ... port?tab=B
here is the link (under the updates tab) save the update to your desktop, unzip (decompress) the file, drag the two folders to your SD card. Pop the SD into the front of the avic before you start your vehicle (unplug any usb devices) and turn the vehicle on. Update takes about ten minutes.
My Avic is working today after the update and seems to be a little more responsive and faster overall. Worth taking the 15-20 minutes to complete the update to get your unit back up and running.