2011 Santa Fe iPod Comm Error
 

When I hook up my iPod to the Santa Fe, it defaults to playing songs in alphabetic order. If I hit the "Random" button, or hit the track advance, either on the radio or on the steering wheel, the display on the radio says "Comm Error" and the iPod disconnects. I can sometimes get it to play random, but if I try to skip a song I get the same error. I've replaced the cable (Hyundai) and the dealer has replaced the entire radio unit. After the radio was replaced the
"Random" worked fine when I was driving home. This was a month or so ago. Now the problem has returned. Any suggestions?