Jake Posted June 13, 2006 Share Posted June 13, 2006 The AirCon on my 6sp TT doesn't work. The clutch in the centre of the compressor isn't engaging. I've had it checked and the system is pressurised. (Thanks Squiffy!) I did the diagnostic check (Turn ignition on while holding down 'AUTO' and 'Recirc/FreshAir' buttons) but there are no reported errors and the AUTO button flashes steadily, which means NORMAL. I've tried disconnecting the pressure switch by the ABS pump but all that does is make the small radiator fans come on. I've tried tapping the front of the compressor's clutch with an extension bar while the engine is running and the AC is on but that didn't seem to do anything. I'm out of ideas now. Any suggestions? Thanks Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted June 13, 2006 Share Posted June 13, 2006 surely mate if the clutch isnt engaging a new compressor will sort it, as maybe the clutch on the current unit is nackered? Quote Link to comment Share on other sites More sharing options...
squiffy Posted June 13, 2006 Share Posted June 13, 2006 found the fuse (thanks pete sharp!) Fuse #42 HTR 50 A:Air Con system - Type C fuse It's in the engine compartment fuse box Quote Link to comment Share on other sites More sharing options...
Jake Posted June 13, 2006 Author Share Posted June 13, 2006 Sorry, forgot to say that Squiffy tested the four connector socket that plugs into the back of the compressor with a voltmeter but it was completely dead. I wonder if this could be to do with the piggy back Motec ECU. Hmmmm Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted June 13, 2006 Share Posted June 13, 2006 Sorry, forgot to say that Squiffy tested the four connector socket that plugs into the back of the compressor with a voltmeter but it was completely dead. I wonder if this could be to do with the piggy back Motec ECU. Hmmmm forget my idea then Quote Link to comment Share on other sites More sharing options...
Jake Posted June 13, 2006 Author Share Posted June 13, 2006 Fuse #42 HTR 50 A:Air Con system - Type C fuse Not sure how to ID that fuse! I'll go look. Quote Link to comment Share on other sites More sharing options...
Jake Posted June 13, 2006 Author Share Posted June 13, 2006 forget my idea then It would be a bit odd on a year 2000 Supra when there's all those 1993 ones still going strong. Quote Link to comment Share on other sites More sharing options...
squiffy Posted June 13, 2006 Share Posted June 13, 2006 i remember seeing it listed but thinkin "htr=heater so cant be" DOH! Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted June 13, 2006 Share Posted June 13, 2006 It would be a bit odd on a year 2000 Supra when there's all those 1993 ones still going strong. well squiffy kindly diagnosed mine as shagged and its a 1996...so i going to see if i can free it up, if not ill have to get another compressor Quote Link to comment Share on other sites More sharing options...
Jake Posted June 13, 2006 Author Share Posted June 13, 2006 OK, I swapped the big black 50amp Heater fuse (got to be that one, hasn't it?) with the one from my other VVTi Supra but the AC still doesn't work on the 6sp and still does on the Tiptronic. Bugger. Quote Link to comment Share on other sites More sharing options...
Jonny5 Posted June 13, 2006 Share Posted June 13, 2006 My aircon isn't functioning either at the moment..I think it needs a re-gas, but to make sure the compressor was Ok I performed a small check/test. In the fuse box there is a specific relay for the Compressor clutch, right hand relay nearest the wing if you will. Take the relay out, start the engine then get a small piece of wire. Then you need to link out the contact terminals (that are shown on top of the relay), this will energize the coil on the clutch to engage it. This will prove obviously that the compressor is OK and not seized. If it is OK then perhaps you have a faulty relay if no other codes show up?? Just beware though if the compressor has seized this little test may cause the belt to squeal:) cheers Jon.. Quote Link to comment Share on other sites More sharing options...
Sharpie Posted June 13, 2006 Share Posted June 13, 2006 Not sure how to ID that fuse! I'll go look. I went out to the garage to take some pic's Quote Link to comment Share on other sites More sharing options...
Sharpie Posted June 13, 2006 Share Posted June 13, 2006 I'm assuming there is no difference between UK and your RSP late car ? Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted June 13, 2006 Share Posted June 13, 2006 whats the AM2 30amp fuse for? Quote Link to comment Share on other sites More sharing options...
absz Posted June 13, 2006 Share Posted June 13, 2006 theres a fuse in fascia 1 F2 (7.5 amps) but that controls all of AC system i.e relays and control switches. then you have a AC clutch relay which is located on plate no1 relay no KI43. i'm not sure exactly of its location but the pics i have show it on the nearside bulkhead i think its on the inside by the heater blower motor. Quote Link to comment Share on other sites More sharing options...
Sharpie Posted June 13, 2006 Share Posted June 13, 2006 whats the AM2 30amp fuse for? Starter system - I'll take a pic of the book and post it up. Quote Link to comment Share on other sites More sharing options...
SimonB Posted June 13, 2006 Share Posted June 13, 2006 Sorry, forgot to say that Squiffy tested the four connector socket that plugs into the back of the compressor with a voltmeter but it was completely dead. I wonder if this could be to do with the piggy back Motec ECU. Hmmmm I *think* the way the air con clutch works normally is the air con amplifier switches a connection to the ECU to ground when the switch is on. The ECU then knows to raise the idle, and it switches another connection to ground which energises the relay. So it could be something to do with your Motec I guess. Quote Link to comment Share on other sites More sharing options...
Jake Posted June 13, 2006 Author Share Posted June 13, 2006 Oooo, If that works Jonny it's exactly what I need! So it's the bottom right hand relay? (see attachment) I need the engine runinng and AC turned on, right? Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted June 13, 2006 Share Posted June 13, 2006 Starter system - I'll take a pic of the book and post it up. ok heres a question mate, i removed 2x 30amp fuses from either efi1 and efi2 or AM2. but as i didnt know which 2 it was i got a 3rd fuse and stuck it in all 3 Quote Link to comment Share on other sites More sharing options...
Jake Posted June 13, 2006 Author Share Posted June 13, 2006 That's not a question. Go start your own thread Sonny Jim Quote Link to comment Share on other sites More sharing options...
Whitesupraboy2 Posted June 13, 2006 Share Posted June 13, 2006 That's not a question. Go start your own thread Sonny Jim pmsl, edited below just for you mate,If i start my own thread no one will answer....so im just gonna borrow yours for a little bit i removed 2x 30amp fuses from either efi1 and efi2 or AM2. but as i didnt know which 2 it was i got a 3rd fuse and stuck it in all 3 what effect will this have? Quote Link to comment Share on other sites More sharing options...
Jake Posted June 13, 2006 Author Share Posted June 13, 2006 I went out to the garage to take some pic's Thanks Peter. I'd swaped the wrong one before. That one (number 42) is ok, not blown. I don't have anything in Number 40 though - just an empty space. Quote Link to comment Share on other sites More sharing options...
Jake Posted June 13, 2006 Author Share Posted June 13, 2006 In the fuse box there is a specific relay for the Compressor clutch, right hand relay nearest the wing if you will. Is that the one marked MG CLT on this diagram? How do you get these relays out? I pulled it really hard but it won't come out Quote Link to comment Share on other sites More sharing options...
Sharpie Posted June 13, 2006 Share Posted June 13, 2006 I'll take a pic of the book and post it up. Quote Link to comment Share on other sites More sharing options...
Lucifer Posted June 13, 2006 Share Posted June 13, 2006 2 Relays under passenger headlight. They are Aircon arnt they? Quote Link to comment Share on other sites More sharing options...
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