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Cayenne S 2008 Pin 34 of level control ( shortage )

MR.WHO · 2018-10-26T15:13:33+0000

Dears, i have an error 1772 on my Porsche Cayenne S 2008 since 2 months and i'm not riding the car. i already replace compressor + valve block + level control unit in the back but the problem was not of all After i say a PDF that describes how to diagnose the problem, i found that the Pin 34 of Connector A was shorted to B+ it supposes to give me <0.3 V buti have 4.2V ~ 7.7V !!!! i was searching hard to know where is the path of this pin and as per some diagram on internet, it says that it connected directly to Pin 8 of valve block connector. but it was not !!! i measure the voltage from the VB conn. it was <0.3V !!!! i cut the line 34 and i connect it directly from CU pin 34 to Pin 8 i got error 1773 which is talk about Pin 34 ? can anyone help on this ? or provide me with the correct diagram if I was wrong? Thank you all