i've got a fair amount of clicking from the aux belt systems on my 1.6 - my suspect is the air con (sanden) as the engine doesn't seem to rev up when i turned the AC on as it used to.

i pulled the belt earlier and the outer pulley spins happily and the plate on the outer face also turns but the two don't turn together regardless of the switch position. the fans all come on when i turn the AC on (its the ghetto manual version) and vag com readonly says there isn't a problem although i don't know which module it would be - it wouldn't talk to HVAC (8) so i tried all the others - nothing amiss.

shouldn't the pulley and the outer turning plate lock together if the AC was running?

the outer plate feels as if its turning the AC pistons (think turning over a two stroke by hand - that sort of motion).

because i'm getting (what feels like) compression might the clutch have failed or is this not how it all works?

everything else seemed to turn freely altough i stupidly didn't check the tensioner.

the centre nut seems ok.

Yes the clutch should engage properly. So either its low on gas and it not starting (possible leak) . electrical fault to the compressor terminals (could be wiring/pressure sensor). or the compressor is duff.

First port of call would be a diag check/gas check. And check voltage at the compressor terminals.

Hi,

thanks for the quite response - i'll check the voltages on the multi plug.

i get 4.1v between the two pins in the multiplug.

guess somethings up - i'll get the gas checked unless a low voltage is indicative of something else.

cheers,

toby

i get this with the ignition off - no voltage between either pin and the alternator casing but between each other is 4.1v - is this a problem?

only checked as i read on a mk4 golf forum this was an issue.

the battery hasn't been going flat. yet.

This is very odd as I am having the same low voltage at the plug (see my post). Perhaps we can sort this together!

Sounds like some sort of common electrical issue....

Edited 11 November, 201213 yr by Liverpool-Lad