there are a couple guys here with that headunit.....here's a few posts found when searching for DDX8017

http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=38;t=002694;p=2#000018

http://www.xterraownersclub.com/ubb/ultimatebb.php?ubb=get_topic;f=38;t=002614#000005