AC Issues - Compressor Clutch Always Spinning or hidden from view? - Toyota Yaris Forums

tmontague · 04-08-2019, 10:36 PM

that pulley will always spin, the a/c compressor is not a typical magnetic clutch where you can just look to see if it is engaging or not. I would get a manifold gauge set to see if you have any leaks anywhere.

tonynf89 · 04-08-2019, 10:45 PM

Quote:

Originally Posted by tmontague

that pulley will always spin, the a/c compressor is not a typical magnetic clutch where you can just look to see if it is engaging or not. I would get a manifold gauge set to see if you have any leaks anywhere.

Thanks for that. That’s what I was thinking it was. I might ask around some guys at work about the gauge set to borrow one because for the price it may just be easier taking it into the shop lol.

komichal · 04-10-2019, 03:30 AM

Proper gauge analysis is certainly a point to start with.

There is no magnetic clutch but a solenoid valve in that compressor that may cause difficulties. The valve can be triggered also with original TechDoc software and cable. Cheap e-bay alternative also worked for me.

You may also investigate the pressure sensor, it is easily accessible under the hood and it is a single sensor for both high and low pressures. It changes the resistance values based on the AC pressure. There is a thread here somewhere where I believe ctscott described how to bypass this sensor using two resistors.

I had difficulties with that sensor, it gave some strange resistance spikes which confused the control unit and it disengaged the compressor to protect it from damage. I bought the sensor (original Denso) on ebay and got it replaced in the shop (there is a need to evacuate the AC system first). Running cool again.

04-08-2019, 10:36 PM	#1
tmontague View User's Garage Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012 Location: Caledonia Ont. Posts: 2,938	that pulley will always spin, the a/c compressor is not a typical magnetic clutch where you can just look to see if it is engaging or not. I would get a manifold gauge set to see if you have any leaks anywhere. __________________ No one ever wants to give a Yaris the point by...

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04-10-2019, 03:30 AM	#3
komichal View User's Garage Drives: Yaris 2007 1.3 2SZFE 64kW Join Date: May 2012 Location: CZ Posts: 337	Proper gauge analysis is certainly a point to start with. There is no magnetic clutch but a solenoid valve in that compressor that may cause difficulties. The valve can be triggered also with original TechDoc software and cable. Cheap e-bay alternative also worked for me. You may also investigate the pressure sensor, it is easily accessible under the hood and it is a single sensor for both high and low pressures. It changes the resistance values based on the AC pressure. There is a thread here somewhere where I believe ctscott described how to bypass this sensor using two resistors. I had difficulties with that sensor, it gave some strange resistance spikes which confused the control unit and it disengaged the compressor to protect it from damage. I bought the sensor (original Denso) on ebay and got it replaced in the shop (there is a need to evacuate the AC system first). Running cool again.