How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Peter Bagley Your Own Question
Peter Bagley
Peter Bagley, Toyota mastertech
Category: Mitsubishi
Satisfied Customers: 616
Experience:  master tech at Toyota dealer
24571351
Type Your Mitsubishi Question Here...
Peter Bagley is online now
A new question is answered every 9 seconds

1990 Mitsubishi Eclipse 2.0L turbo Automatic. AC clutch wont

Customer Question

1990 Mitsubishi Eclipse 2.0L turbo Automatic. AC clutch wont engage.
Replaced AC pump and recharged system.
Submitted: 6 months ago.
Category: Mitsubishi
Expert:  Peter Bagley replied 6 months ago.

Hello and welcome to just answer. I value your input to my questions so I may help you better.Have you checked the A/C fuse? Relay?

Customer: replied 6 months ago.
Good morning, yes I checked the relay and swapped with a known good one and it works, and all the fuses are good.
Expert:  Peter Bagley replied 6 months ago.

Ok thanx for that info. when you swapped the relay di you first ck the terminals in the fuse block where the relay sits for two power sources

Customer: replied 6 months ago.
Yup, I can jumper it and get the AC clutch to engage, as well as jump the secondary fan and get that to engage.
Customer: replied 6 months ago.
Something is not letting the relay's get triggered.
Expert:  Peter Bagley replied 6 months ago.

Good thanx for that info, SO YOU GET A CONSTANT 12V TO ONE TERMINAL BUT NOTHING ON THE SWITCH SIDE RIGHT?

Customer: replied 6 months ago.
both have a 12 volt batt present
Expert:  Peter Bagley replied 6 months ago.

Let me get this straight? you said when you swapped the relay with a good one it worked?

Customer: replied 6 months ago.
Sorry, No I meant I tried a good relay just to rule out bad relay. It still wont engage with the new relay
Expert:  Peter Bagley replied 6 months ago.

Ok thanx for that info, did you jump it at the relay location to see if the clutch engages . did it?

Customer: replied 6 months ago.
I did. and it does engage the pump and the car's interior air starts to cool.
Expert:  Peter Bagley replied 6 months ago.

Ok thanx for that info next locate the pressure switch and disconnect it and jump the connector try that

Customer: replied 6 months ago.
Yup, did that as well. No change. Ohm'd out the switch and it passed as rest.
Expert:  Peter Bagley replied 6 months ago.

Have you tried bypassing the A/C switch itself?after that the only other thing is the A/C amplifier itself.

Customer: replied 6 months ago.
I installed a second switch that I know works. Same results. When I press the button just the passenger fan comes on.
Expert:  Peter Bagley replied 6 months ago.

well all that's left is the amplifier.

Customer: replied 6 months ago.
That's the unit above the glovebox on pass side?
Expert:  Peter Bagley replied 6 months ago.

The ACCU is a plastic box attached to the front of the evaporator with a small connector on the top. The green/orange wire should go to +12V (which then goes to the dual pressure switch, A/C refrig temp switch, compressor clutch relay, and ECU) when it wants to turn on the A/C compressor.

Customer: replied 6 months ago.
I'll check that in the AM
Expert:  Peter Bagley replied 6 months ago.

very well gn