2010 mazda 3, 2.0, auto. ac comp will not come on, ac mag, heater, room fuses good, relay good, manual air control working, center term 87 on relay has con 12v, term 85 has switched pwr, but no pwr to clutch mag with engine run and ac on. gauges read, @ about 70f, low side: 70psi, high side: 90psi. static and ac on running. tried jumping 87 and 30 term on relay got nothing. ohmed 3wire pressure switch on beep mode got nothing, have read that shouldnt try jumping p/s pigtail could damage pcm, is this correct, how do u test this p/s, can i back probe p/s w/out damaging pcm, how do u test 1wire ac mag? beak in wire from relay to comp? from my research this could be bad txv, comp, or clog. how do i pin point the prob? any help in this matter will be greatly appreciated.
thanks, m. s.
correction, low side, 80psi . static press. does drop to about 70, after few hrs. back probed p/s, red 4.9v, wht 0.79
That's a problem with modern computer run AC systems they're so complex if you can get it to run by sending power to it I would run it with a toggle switch and bypass all that computer crap otherwise you're going to spend a fortune spending your wheels if you don't have a Mazda dealer computer to scan it with
