I have just replaced my CD changer with an Mr12 Volt. Everything works, and it's nice to have Bluetooth. However, when running ISTA, it resets the MOST every time. The CCC also restarts when the MOST is being reset. Additionally, the CD changer module is red. I guess it doesn’t recognize the Mr12 Volt as a CD changer. The module shows as red with the text CDC_0x3C and the error: S 0076 No communication possible with CD changer / iPod interface. Has anyone experienced something similar?

 

I believe that's all normal. When I scan ISTA I no longer see the CD changer or the display for the CIC. As long as everything functions you're fine, but if you have OCD you will always be annoyed by the red in ISTA