I have the same problem with my 97 Lexus. There is a 6 disc changer in the glove compartment if you haven't been told that. Mine didn't come with the magazine changer so I went to the Lexus parts dealer and bought one for like 30 dollars. Check and see if you have one, you may have to purchase it. I need to check out the pioneer thing, seems it might be an answer to the radio display problem.