My radio sometimes make the sound (on and off) and does not recognizethe cd changer.. If I turn it off for a second and then turning back oneverything working back too normal.. When I take a curves make sometime a lot noise. Any idea what could be?

 

Possible a loose connection somewhere or short.

 

Someone know what kind of troubleshooting that radio does

 

You likely have a bad cable/connection between the CD Changer and the Radio. I had this within the first month of owning my car. They replaced the cable. Second, I'm not sure if you have the amp or Entertainment Package (mine is HK, and I don't know if yours is Bose or what) but I had the amp software updated because I would get static at times. Hope that helps.