Engine Size: 2.0
Refrigerant Type: 134A
Ambient Temp: 95+
Pressure Low: 130
Pressure High: 130
Patient is a Sanden SD7V16, submodel 1233 in a 04 Jetta that appears to have a bad clutch coil. Specifics of the diagnosis as follows:
A. No continuity when measuring coil indicating open coil winding. Checked both ways (reversing leads). No dice.
B. Voltage from vehicle harness measured at approx 9.6 volts constant with brief spikes (less than a half second) up to 11.5-12 volts. Engine was running for this check.
C. Only pressure switch I could find is the three wire version. No jumping of terminals attempted. No voltage measurements taken on any of the terminals.
D. Compressor turns without binding or other issues when hub is rotated by hand.
I have attempted to locate and procure a replacement coil for this compressor with no luck so far. Sources such as those on this forum and others that I have tried via the internet do not carry this unit.
According to the info I have obtained, this is the 119/120 mm clutch coil with a built in diode. VW dealer can get what I believe to be the clutch/coil assembly for far more than a complete replacement compressor/clutch assembly bought from other sources. No part numbers for the coil were available from the VW rep I spoke to.
I am down to searching local junkyards in the hope of finding a useable coil from a scrap compressor. Vehicle currently has about 89 K-miles.
1. Can anyone direct me to a possible source for a new coil, even if I have to buy the clutch assembly, at a reasonable price (less than a new compressor)?
2. Do the voltage readings stated in B. above sound correct? If not, what else should I check?
I have searched this forum for similar issues prior to this post and have found no applicable ones.
I thank you in advance....
Open circuit you certainly need a new coil. If you can't find one cheap it may be better off to replace the whole compressor and have a guarantee on the complete unit than to spend big bucks tinkering with the old one you have. Seems like a lot of them develop internal failure of the variable system.
Thanks for the reply. Yeah, I have considered a replacement compressor, but I would like to exhaust the coil possibility first as the comp is still good and I hate having to replace the entire unit just to get a good coil.
I have a fair number of good clutch coils from otherwise junk SD7V16 compressors, and one new one. I will need to check if they are for your 1233 model compressor. If you would like to send me an email it's fasto_tt at yahoo dot com.
I just looked and mine are from SD7V16-1102 compressors for the VR6 engines. These have a 6 or 7 rib poly-v serpentine belt pulley. I don't know if the clutch coil is the same. Dimensions are OD = 4.055" ID = 2.525" thickness = 1.095" mounting hole dia = 1.772". I can't find my digital camera or I'd attach a picture.
Edited: Wed July 13, 2011 at 1:25 PM by fasto
Looks like I may have scored paydirt with the coil, so we'll see what happens when it arrives. The coils you have are the 103 mm units, whereas the one I have been hunting is the larger 120 mm one.
However, I really do appreciate your reply and offer of help. I was running out of options...
I'm actually looking for the same coil for my 2003 Jetta. It seems like a hard part to find! If you don't mind my asking, where did you locate yours? I've got a Sanden SDV716 1233 compressor as well.
Call David at a company called Yellowrose (company is in Texas so this is an appropriate name)....# is 817-332-4248. Price was reasonable at around $35 or so. Coil I received looked like one that was removed from a previous unit, but it worked as I couldn't find one anywhere else. So far so good...
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