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Climate control isn't working

blind_elk

By blind_elk,
in General Maintenance

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blind_elk Grand Master

blind_elk

Posted
Posted

Ever since I fitted the Wolf to the GTS4, I've had no A/c / Climate Control. And today was "Hot, DAMN HOT". The A/C works, except that it won't fire the compressor, because pin 9 has something to do with the "low gas pressure" switch in the A/C system.

Can someone please track down the colour of the wire at pin 9 on a R32 ECU. And, if possible, please tell me what happens at that pin (volts = ??, whatever) when the A/C is turned on. Is it simply a matter of connecting to earth to get the A/C to work again.

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Sumo Mentor

Sumo

Posted
Posted

Well the low gas pressure switch is generally setup in series with your A/C circuit, and if you have low gas she will not pull the clutch in. I don't have a wiring diamgram for a skyline 32 or 33 just to see what might be stopping the flow of power.

With a test light and the car running and the A/C turned on at the climate control, probe the wires to see if power is getting to the pressure switch, and then passing through it and going to the compressor clutch. If the power is getting right down to the compressor it is possible to have a break in the clutch winding - I have seen quite a few in different vehicles.

Cheers

Sumo

P.S. I take it you did the easy things first and checked all the fuses? :)

Jax Collaborator

Jax

Posted
Posted

IF your pressure is OK, And your magnetic clutch is OK, and current gets thru the pressure switch, then earthing it After the pressure switch will switch on yout Aip-Con. Wire 9 does earth thet wire inthe ECCU, but it gets a signal from wire 46 to enable it to do so. I havent worked out why yet, got similar prob to yours. Still working on it. Voltage @ 9 with A/C ON abt 1 volt ?? A/C OFF - Supply Voltage. If you find prob, please post. May help me. Don't now what long-term result may be from earthing after pressure switch, though it appears to have no ill-effect.

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