Question about Mitsubishi Lancer

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I took my 2004 Mitsubishi Lancer to a local A/C shop , the mechanic told me the clutch will not engage unless we hit it while the engine and AC unit are both turned on.

Posted by Karen Carroll on


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On The Lancer 2.0L 98% Cases I ve had on this vehicle Was Resolved By Replacing The Field Coil On the Ac Compressor $98 only available online..
Or Thru Mitsubishi A Clutch Kit Replacement Would be Ideal But It Cost the same as a new compressor.. just be easy with ur current parts and replace the Magnetic Field Coil

Posted on Jul 12, 2012


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  • 736 Answers

SOURCE: ac compressor clutch does not engage

to prevent damage to the air conditioning system there is a "low pressure switch" located on the condenser near the low pressure hose (large one) .. if the refrigerrant (R134A) gets too low then the clutch will be blocked from activating by that switch .. you can have your system tested and recharged or you can do that yourself .. the R134A is available at auto parts stores .. some come with a gague that is required for proper charge .. if you dont already have a gage then yoiu will need that one ... recharge kits often come with instructions .. other less likely but possible problems could be a fuse or bad AC clutch relay. sometimes damaged wiring or bad clutch will be the problem but much more likely just low fluid ..

Posted on Jun 24, 2010



  • 37 Answers

SOURCE: 2006 mitsubishi lancer evo ix clutch

there are special tools needed that only dealers and some trans shops will have.Definitely a no-no for back yard mechanic

Posted on Jan 28, 2009


Harvey N Tawatao

  • 3854 Answers

SOURCE: AC Clutch engages as soon as battery is hooked up

Your A/C relay may have gone bad and has disconnected the power to the A/C compressor clutch.
Not sure where the relay is to your A/C, it may be in the fuse box but regardless check the relay and replace if it's seized. If you like in the mean time, you can always disconnect the wire harness to the A/C compressor clutch to keep the battery from draining and save your compressor from over heating.
Good luck and hope this helps. Keep me posted and be glad to help.

Posted on Jun 03, 2009

Testimonial: "Well, turned out to be the engine was saturated with water, and I just removed the fuse for the ac clutch, do not need it this year! LOL"


ricky horwood

  • 128 Answers

SOURCE: Hi i have a mitsubishi lancer 1.3 petrol 2006, i

wow ok i am from australia our lancers only come in a 2.0 or 2.4 i was shocked to see a 1.3 lancer
now with the key
every time you incert the key into the ignition it reads the key as there is a chip in the orignal keys so thatway the immobiliser knows thatit is safe for the car to start
if the cra can not read the key it will not let the car start evan if it is twisting to start etc
you need to go to mitsubishi and have them copy some new keys and let them reset the codes on the immobiliser if you try to do so your self it may trigger a cold shut down
this is when the immobiliser its self needs to be replaces as well as the keys
hopes this helps

Posted on Jul 05, 2009


Greg Bernett

  • 2989 Answers

SOURCE: ATF for Mitsubishi Lancer ES 2004

Automatic Transmission,F4A42-1

Posted on Jul 29, 2009

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1 Answer

How to fix ac clutch that always engaging

Hi Mark
Thats an easy one...
It gets told to engage by a single wire attached to the clutch.
This usually has a bullet type connector close by.
12v = ON
Disconnect it. Solenoid disengages.
(you could put a switch in the line)

This wire is controlled by the AC (control electronics) temperature sensor & the pressure build up in the refrigerant lines.
Eg The unit turns on to cool vehicle but the refrigerant is low or the high pressure line is too high so it shuts off. Then the cycle starts all over again.
You need some Service on your AC system.


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Dear Friends, I have 2003 Lancer GLXI , I have a problem mention below When Engine and AC are started there is a vibrating noise of the bonnet. One local mechanic said its ECM problem. Car does not...

ECM - electronic control module? Maybe, but there are other issues to be checked first.

You AC is clearly not functioning.

The vibration when the AC is on may be the AC belt idler pulley, or perhaps the compressor clutch.
This is easily checked. The belt can be loosened, and the idler pulley checked for free rotation. At the same time, (engine off) the compressor pulley should be easily rotated. The compressor clutch is controlled by the thick single wire that runs to the compressor. Locate the connector to the main wiring loom and disconnect it.

Run a wire from the battery to the clutch wire. You should hear a load click as the compressor clutch engages. You should be able to rotate the compressor pulley, but there will be a significant load resistance. If the compressor seems jammed, then I'd suspect it has a serious problem.

There's a High pressure A/C valve some where near the front of the car. The cap is probably light blue. Press the valve inside momentarily. If you hear a loud psssttt, the AC pressure is probably OK. If you get a soft sssss sound, you've lost pressure. The usual reason is age or pin holes in the condensor in front of the radiator.


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2003 Mitsubishi Lancer air conditioner blows hot air. It will not take Freon. Any ideas?

Your 2003 A/C refrigerant is R134A not R12, commonly called Freon.

If "will not take Freon" means that you have checked the A/C pressure and its correct, the question becomes why is the A/C not working.

A common cause is the compressor clutch not engaging. If you turn on the A/C and interior fan, the engine should slow down as it takes the load from the compressor. If this is not happening, the clutch is not engaging.

If you were simply told that your car "does not take Freon", then this is correct (see above), but lets assume that the refrigerant pressure was not actually checked. The most common fault (and now quite likely in a 2003) is the refrigerant has leaked out through pin hole corrosion. This is most commonly the condensor in front of the radiator. Any AC garage can tell in a few minutes if the pressure is correct or not.

The fix is replacing the condensor and drier cannister, vacuuming out the system (mandatory) and repressurizing. Get quotes including parts from reputable AC garages. Many are not in my experience.

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1 Answer

My 2004 Mitsubishi Lancer will not start. I think it might be the clutch pedal switch but I am not sure. I took it off and tested it with my ohm meter with it having no resistance while disengaged and...

Use your meter to check for power at the clutch switch when the key is turned to start. If no power, the ignition switch or wire from the switch is bad. If the is power, the starter solenoid is bad.

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I would take it back to whoever replaced the module however, if you want to check for the problem yourself, Look for the AC compressor. with the AC turned off have someone start the vehicle, while watching the AC compressor have the person in the vehicle turn the AC on. If the clutch engages then you have lost your freon charge and need to have the AC unit serviced. If it does not start turn the engine off and check all the wiring connections going to the AC compressor. If all the connections are good start the vehicle, and have the person in the vehicle turn the control to cold and turn on the defroster. If the AC clutch engages then you have a bad ECM module or mis-programmed ECM take it back to be Properly programmed and repaired. If the clutch does not engage it is possible the AC compressor is bad. Take the vehicle to the Mechanic to have teh AC system checked to see why it is not engaging.

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Same happening here

I have a '03 Lancer that had the exact same problem. I pretty much had it down to a formula based on temp., humidity, cloudiness, etc. as to when the AC would work or not. I took it to a couple of shops and they couldn't figure it out. I finally took it to the dealer and they quoted about $1000 to fix, said "no way." Anyway, it turns out that both the AC clutch coil and AC thermostat needed replacing. I found a shop that fixed me up for less than $350. Works like brand new again. Hope that helps and good luck.

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there are special tools needed that only dealers and some trans shops will have.Definitely a no-no for back yard mechanic

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