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I seem to recall a diagnostic mode for these stereos.

I *think* it goes like this:

With the radio off, but the key in the ACC position, hold down the 1 and 6 buttons, and press the CD button 3 (or 6?) times. It will beep a couple times and check itself out, and you'll be able to use the up and down rocker to scroll through any error codes.

What you can do with said codes I don't really know <img src="/forums/images/graemlins/zombie.gif" alt="" />


My FSM for 2001 Taco says CD button 3 times with the 1 and 6 buttons down (stereo off, ACC on -- as stated above).

There are four pages of trouble-shooting flow charts about which buttons to push to scroll thru all the component checks, and three full pages of codes and descriptions/countermeasure/parts to be inspected.

Check the FSM link to get the info. Good Luck.