Question about Toyota 4Runner
So when you turn on the A/C switch inside the vehicle does it blow any air (hot or cold) out at all? When was the last time is was refilled with freon? Looking under the hood with the vehicle running, do you see the rubber belt turning the A/C compressor without any noise or problems? Do you need to press a seperate button after the fan switch is turned on (my 1994 Toyota Camry is like that) to make it cold inside the vehicle?
Posted on Jul 23, 2009
After you turn the fan switch on, you turn the A/C switch and its light turns on but the compressor does not engage, right? In that case you either have a pressure problem (lack of freon - pressure switch is preventing the compressor to start) or you have a failure in the A/C amplifier circuit board. This board is located behind the glove box. Basically it receives 12V signals from fan and AC switches and energizes the line of the magnetic clutch and the condenser fan relays.
Posted on Aug 21, 2009
Well you can find witch wire at the compresor clutch is ground and hot the other side to determen if clutch is oprating if it is then you can go to your local part house get some freone hook up to low port side witch is the smaller of the two and start car and open can it will go in if it is not to low if its to low you will need to pull the air out of system with vacume pump you can rent these at rental place if compresero come on after freon you should be ok only ad small can at a time do not over fill hope this help redoil.
Posted on Aug 06, 2009
The ECM controls the A/C system in your vehicle.
And yes - there is a pressure switch that will not allow the compressor to start.
Instead of throwing money blindly at the problem - a quick diagnostic test performed at a dealer or independent mechanic will pinpoint the failure for you.
It could be anything from a bad compressor clutch - to a pressure switch - to a failing ECM - and/or a bad switch.
Thanks for using FixYa!!
Posted on Jul 23, 2009
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Posted on Jan 02, 2017
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