Usually with Pioneer brand hu's you have to power off the radio, then hold the 'function' button until the radio comes back on. keep hitting the function button until 'aux' comes up on the radio and turn the feature on. Hit the source button to escape this menu, then power on your unit and it should work. Hope i helped.//content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif