Thread: D2 Air Con Clutch Not Engaging

Quite possible if there is power getting to it that the coil in the clutch are had it. That is what cause the clutch to magnetize and engage. They are not hard to remove, just a bolt in the front and the pulley and clutch is on a keyed shaft. They can be tight though! Before you take it off runn a 12v source to the clutch direct from the battery, just to rule out low voltage problem.
Cheers Scott

theres a one shot thermal fuse in the coil its most likely blown or the wire has broken off at the bend where it goes into the coil.

fixing both is an insitu DIY repair if you have the gear to remove the clutch plate, and a decent soldering iron.

I'm not 100 % sure but I think that if you are out of gas the clutch will not engage. I'm sure someone with more knowledge will steer you right on that.
Good luck.
Nick.

Have seen lots of these where the actual front cover has fallen off... can you take a photo of the front of your compressor and post it on here?

Jc

Thanks all for your quick replies.

A bit more info, that I forgot to add at the start:

I measured the resistance at the clutch connections on the compressor, which gave me ~5 ohms. Not sure what it's meant to be, but this shows that the coil is probably still intact and would pull around 2.4A when energised.

I'll take a pic and post this evening.

I don't think it's out of (or low) gas, as the ECU would not try to energise the clutch if that was the case. Seems to be an issue with the clutch itself, rather than the overall system.

I'll try a direct connection to the clutch from the battery, to rule out any voltage drop issues (especially given the current the clutch pulls on those small wires!) - also, when changing out the injector harness recently, I noticed that the wiring running across the front of the block (which includes the clutch wires) was a bit heat fatigued (insulation getting hard and brittle).
Good suggestion to try a direct connection - thanks! (given that I'm an Elec Engineer, you would have thought that I'd have already tried that!!)

Cheers all!

Andy

Hi All

Apologies for the delay - I was made redundant last week, so have been a bit preoccupied!
Had a chance to try the direct connection to the clutch from the second battery.
Still no joy, although the clutch pulls about 3.2A when energised so is trying to do something.

I've attached a pic as requested.

Starting to run out of ideas, other than looking at dismantling the front end of the compressor in-situ.

Would appreciate any further advice, and also tips on accessing the clutch mechanism of this compressor,

Cheers

Andy

Difficult to be sure, but that looks like the clutch plate is missing.
Looking at the pully with engine on you should see a plate on the front which is not spinning. When you engage he clutch, the plate locks against the face and is driven.


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That's what it looks like !