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You're going to get a lot more results on a US forum by using US measurements instead of Metric. So with my additions in bold:
Originally Posted by eb-86 converted to Imperial measurements by CathedralCub
Today I checked the freon pressure , totaly ok .
I noticed for something else but I am not sure , only after the car very warm 199.4F (+93 celcius) the clutch engage (outside temperature was 64.4-71.6F (18-22 celcius))
any help ?
Last edited by CathedralCub; Feb 13, 2021 at 02:52 AM.
Reason: Changed a word to "US"
i think this car does have a pressure switch. it has 3 pins; one is a ground, another supplies 5 volts DC to the switch and the 3rd pin is a return to the computer where it reads how much voltage is coming back. too hi or low and the compressor won't come on. as long as the outside temp is above 40 degrees or so the computer will turn on the compressor. check the pins on the pressure switch, one of them should have 5 volts.
but if your not getting 12 volts at the relay that'* probably whats wrong. you should have 12 volts at pin 30 and 86 at all times even with the key off, check the fuse that feeds this relay. even if it checks good I'd replace it anyway just to be safe.
Big thanks to SoftRide for the above schematic. that'* where I got my info.
If the sensor/transducer is detecting high side pressure too high, or the low side too low, the compressor will not engage. We need to know the pressure readings, with engine running & compressor engaged. You could have a blockage somewhere in the system, usually found in the expansion valve.
Hi everyone
today I checked the AC pressure switch (picture attached)
, ground and referance volt was ok (5v referance) but the signal wire show 0.2-1.5 v sometime it jump to 3v but going down again , the gas pressure ok for sure .
it'* mean the pressure switck faulted ? Can i replace it without the AC gas go away ?
