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FJRIVAS on Wed November 04, 2009 2:36 PM User is offline

Year: 2006
Make: VW
Model: JETTA
Engine Size: 2.0T
Refrigerant Type: R134
Country of Origin: Dominican Republic


My car has a SANDEN PXE16 compressor. I've been having some issues with the A/C system and I want to make sure the compressor is getting the correct signal from the automatic climate control system (Climatronic). I plan to use an oscilloscope to monitor / measure this signal but I have no idea of what to expect... I contacted Sanden and they say the control valve signal specs are proprietary information. That's pretty amazing... It's like Sony telling you the AC requirements of their TV's are proprietary information.... By the way in most cases that is 120 VAC / 60Hz.

Anyway, here is the question:

-What type of input signal does the PXE Compressor receive?
-Just any general comments about this signal and what should I expect.



ice-n-tropics on Mon December 14, 2009 12:47 PM User is offline

Sanden sells new compressors, not PXE parts or information, as you discovered.Always check your refrigerant charge before messing around with VW's PXE compressor.

You may be able to find my complete PXE compressor operation description from May, 13, 2004 records on this Forum (help from TRB may be required).
Basically the electrical signal to the PXE control valve is a PWM current, 400 Hz.
Valve opens at 0.05-0.24 amp, max. refrigerant flow through valve at 0.75 amp
Valve coil resistance 10.6 ohms.

Isentropic Efficiency=Ratio of Theoretical Compression Energy/Actual Energy. How To Air Condition Your Hot Rod

Edited: Mon December 14, 2009 at 4:07 PM by ice-n-tropics

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