On my E320 94 the Compressor not engaging. I did evacuate the system recharged and drove it for like 15 min then the compressor cut of.
When I restart the car sometimes its works sometimes it does not.
Pressure in the system was checked by my Indy and it check out ok.
What could be?

PS also the check engine came on. I did check the codes and found only code2 and 14 on pin 14
No codes on pin 8

__________________
New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru

You need the codes from the built-in LED/SW when there is the CE lamp.... The Diagnostic Module N/59

We have been thru this before , but I will explain it again.

The CE lamp is activated by the EMMISSIONS Diagnostic Module [ N59]
If it detects a fault that will effect emmissions mandates, it lights the CE lamp , notifying you that it has detected a fault/faults and stored that info in the DM. If you have a CE lamp displayed, you now know have a code stored in the DM and something is wrong.
So, you go to the DM and get that code/s. That can be done with the Owner Access Built-In LED/SW button on the Diagnostic Box..you push the button just like you do with the code tool you made, but you do not need a tool b/c it is already there [ Built-IN]

Pins 8 and 14 are for OTHER MODULES and do not bring up a CE lamp..only the DM does that. Those pins require the tool.

Go here again and look at the VERY FIRST list of codes ..notice it says for Emmissions-BUILT-IN Diagnostic Module in the title..those are the codes that trip the CE lamp. Push the button and get those codes. They will tell you why your CE lamp is ON.
And then you can clear the DM of codes with the same Built-In Sw., which will turn OFF the CE lamp.

http://www.peachparts.com/shopforum/showthread.php?t=107630

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A Dalton

Thanks a lot Arthur. I got the codes 5 and 7 at that build in led.

Also what pin should I check for climate control unit?

__________________
New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru

That chassis does not have one.

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A Dalton

I did bridge the wire 5 and 7 at the Klima relay and I got the compressor running. Is this a clear indication of a bad Klima relay or it could be the a/c compressor speed sensor ?

__________________
New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru