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Hello,

 

I have a problem with PCM in my Cayenne 2004, the right rotary knob doesn't work properly (can't select menu items  or skip several menu items when only 1 turn etc.) also SET and BACK switch doesn't work. Other switches work fine. Any ideas?

 

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I disassembled the unit and found oxygen corrosion on PCB trace (see enclosed file), I cleaned it but still no effect. Maybe a rotary knob works a little better but still slow skipping through menu. BACK switch and SET switch doesn't work. Maybe I should apply some kind of conductive paste on the rubber end of switches?

post-97657-0-00773100-1408797534_thumb.j

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