So I know its February, but L.A. weather can be pretty warm. It got up to 85f last week. But when the climate control came on, she was only blowing hot air. Everything as far as the blower system seems to function as it should. I put gauges on and the pressures seem to be holding correctly. All I can tell is the clutch is not kicking in. I looked up the fuse and relay on the wire diagram and to my surprise there was not a relay at terminal R1 nor a fuse at F6. I'm going nuts trying to figure this one out. No one has had access to the terminal box and I know I didn't pull it. Can anyone confirm the placement of the AC compressor protection placement, and relay?

Brian

 

Oh yeah "Thanks in advance"

 

CuteCat, I found the same thing on my diagram for a 2012. Just to ask the silly question, you were looking in the engine bay fuse box, not the other few in the car?

If you were looking in the correct spot, then I would suspect that you have a late production 2012 and you may have a 2013 wiring harness which may be a little bit different. Looking deeper, I found a statement in the 2013 service manual that stated that for up to 2013 MY cars, there is no magnetic clutch and that the compressor is driven directly from the pulley. Only from 2013 MY onwards does the compressor have a clutch.

 

Check my post history where I went through the same issues. I did a stepwise diagnosis by checking for 12v at the compressor clutch signal pin. There was 12v with the AC button turned on, so we know the AC clutch is receiving 12v. Next I tested the compressor clutch itself and found out that my compressor clutch coil had burnt out (tested infinite resistance and did not respond to directly applied 12v). I suspected that resistance in the ground circuit was causing the clutch coil to pull too many amps and burn itself out. I replaced the compressor and added an additional engine to chassis ground straight from the compressor and I've had no issues since.

 

Hey All
Just didn't want to leave the post hanging out there. I'm at a point that getting under the car @ 67 is a bit much. Gonna try and hopefully find a descent mechanic to drop the compressor. Sure do miss my bay with the lift.

 

Have him check the clutch coil first. That can be replaced without evacuating the refrigerant.

 

Conferm on the clutch coil. I started my diagnosis with electrical. I couldn't find a relay or fuse. Did I read somewhere that some compressors do not use a clutch and if I have a clutchless compressor, will there be a coil?