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A/C clutch, 95 Mazda Millenia

W.O.W. on Tue November 20, 2007 8:54 AM User is offlineView users profile

Year: 1995
Make: Mazda
Model: Millenia
Engine Size: 2.5
Refrigerant Type: 134

My clutch will not engage. I checked all fuses. all are good. I by-passed the pressure sensor and it still won't engage. I un-plugged the hot wire and went directly to the clutch and it worked fine. The compressor is not frozen. Is there a relay that may cause this? HELP!!!

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W.O.W

TRB on Tue November 20, 2007 12:11 PM User is offlineView users profile

May want to get a subscription to AllData.. Lots of computer tests related to this issue.


1. Connect jumper wire between ground and Light Green/Yellow wire of A/C relay female
connector. Turn ignition on. If compressor clutch does not engage, go to next step. If compressor
clutch engages, check continuity of Light Green/Yellow wire between A/C relay and Engine
Control Module (ECM). If necessary, repair Light Green/Yellow wire. If wire is okay, inspect
ECM. See the TESTS W/CODES article in the ENGINE PERFORMANCE section.
2. Measure voltage at Blue/Red wire terminal of A/C relay female connector. If battery voltage is
present, go to step 5). If battery voltage is not present, go to next step.
3. Measure voltage at Red/Blue wire terminal of A/C relay female connector. If battery voltage
exists, go to next step. If battery voltage does not exist, repair Red/Blue wire between AD FAN
fuse (30-amp) in main fuse block and A/C relay.
4. Measure voltage at Blue wire terminal of A/C relay female connector. If battery voltage exists,
replace A/C relay. If battery voltage does not exist, repair wiring between METER fuse (15-amp)
in joint box and A/C relay (Blue wire becomes Black/Yellow wire).
5. Measure voltage at Blue/Red wire terminal of compressor clutch female connector. If battery
voltage exists, service compressor clutch. If battery voltage does not exist, repair Blue/Red wire
between A/C relay and compressor clutch.


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W.O.W. on Tue November 20, 2007 3:15 PM User is offlineView users profile

THANKS FOR THE INFO!! ILL TRY IT. I'll let you know!!

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W.O.W

mk378 on Tue November 20, 2007 4:36 PM User is offline

If the car has another relay that's the same type as the A/C relay you could check the relay by substitution.

2POINTautO on Fri November 23, 2007 10:48 AM User is offlineView users profile

Once you check out powers at this relay, we will go back further into the system logically, now I am on the email list now, I will follow along.

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Give all the dirty details
and dont forget the LO & HI pressures
Year, Make & Model would be nice too

W.O.W. on Sun November 25, 2007 6:10 PM User is offlineView users profile

I checked it out step by step and found a bad relay. By the way, the relay is not located with the rest of the relays in the Millenia. It is enclosed in a rubber boot and is under the hood on the passenger side near the radiator, connected to the right fender. I think it is a "dealer only" part. It is an Imasen relay. Does your company sell them?
[email protected]

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W.O.W

W.O.W. on Sat December 01, 2007 11:46 AM User is offlineView users profile

I followed all the steps as directed, bought a new relay and the clutch still does not engage. Anybody have any new ideas?

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W.O.W

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