PCM 2.1 Diagram

[ffeibiss]

Hello,

I am new to the forum. I have a 2006 Cayenne S which i love, however I can not enjoy it now because of a faulty PCM 2.1 ...

During the end of the summer it was restarting from time to time (twice in a month or so). I thought it was overheating after reading this forum. Few month ago the situation got worse and the unit was restarting every hour. Sometimes it was impossible to turn it on for couple of hours/days. Now the PCM is completely dead and it's impossible to turn it on in any ways.

I was hoping that it will be case of dry solder so I tried to reheat it with heat gun... However that did not help...

Is there any chance to get CIRCUIT DIAGRAM ?

I have a good friend which is an electrician, but he was not able to find the current/voltage leak.

There is nearly impossible to get this unit fixed in Lithuania.

Thanks,

Fabian

[Loren]

You can purchase a (downloadable) diagrams for $1.80 each at Porsche PIWIS TSI.

You will need to open an account there to make purchases.

[ffeibiss]

Thank you for your help! I registered but i could not find the specific document that I need. Do you know the exact name of the document/diagram?

[Loren]

"DVD Navigation" is likely the one you are looking for.

[Richard Hamilton]

If you want internal wiring diagrams for the PCM, I doubt they are available. The Porsche wiring diagrams only show the external connections to the PCM unit.

[ffeibiss]

I guess that is truth... I couldn't manage to find any type of internal diagrams of any PCM or CDR unit. Sadly i'll have to ship the unit to UK or Germany which will be very expensive.

However, I bought cdr23 unit for less than 70USD in case PCM will be unrepairable.

[ffeibiss]

I think i found the issue. I circled it in red. is it possible that the soldered connections melted from heat and connected together?

Sorry for my english, it's difficult to explain...

[Loren]

That looks like a common ground or power bar - if you check with an ohm meter I think you will them all connected to each other.

(click to enlarge)

[wvicary]

Loren is correct, that is a common point.