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Hi,
My PCM unit in my Cayenne turbo 2003 acting a little crazy. When Im inserting my navigation disc the PCM says " Navigation CD: Unreadable ". But it works fine to play music cd's in the same slot.
I have tried to reset the PCM by pressing 1 - 4 - 8. Nothing changes, I have also tried to copy my original porsche nav disc to one another disc but the PCM unit says the same.
I have checked my PCM version and its 2.0, and my firmwire is 2.0 also.

Does anyone have a solution for this problem?
 
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