I purchased a new 2015 Sahara Unlimited. Came with Uconnect 430N RHB radio/Nav system. All worked great from the dealer pickup until the winter of 2016. One day the nav system was working fine. Then, the next day I get a prompt, unable to unlock maps and no detailed maps available. I have 32K miles on the jeep without extended warranty. The closest dealership is 2.5 hours from where I live. I was able to do a software update, so that was done. I was wondering if purchasing a new map update disc might resolve this issue??? Everything on the radio works fine. I can load music from a CD which I did as a test of the HD. While in the nav screen I can see elevation and the small vehicle on the screen and even city locations, but no map detail. When I contact the dealer they tell me I have to bring in the Jeep to have a diagnostic test ran. Again, 2.5 hours from dealer. Any suggestions? I did a search and no one seems to be having this same issue. Any help and suggestions appreciated.