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Old 07-22-2012, 07:55 PM   #1
hybrid gti 2
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Location: (818) 200k+ ej205 ppg 5mt
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Default Can the a/c controls be modified?

Ok I read when you step on the gas at a certain throttle point the a/c will turn off. Is there a way to adjust this on the 02 wrx. It's been irritating me.
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Old 07-23-2012, 01:20 AM   #2
Bluefoton
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Really doubtful. I think it's driven by a WOT signal which is also used by your ECU for A/F ratio maps, you can't adjust that. Is it really that irritating? The AC cycles on-and-off anyways, it's simply a measure to prevent the torque from being robbed under WOT acceleration.. useful at low RPMs, IMHO.

The only thing that you could do is trace back a signal wire into the AC circuit to physically disable the cutoff.
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Old 07-24-2012, 02:02 PM   #3
02CWRX
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Quote:
Originally Posted by hybrid gti 2 View Post
Ok I read when you step on the gas at a certain throttle point the a/c will turn off. Is there a way to adjust this on the 02 wrx. It's been irritating me.
It's been irritating you that you read it? Or could you describe what the car is doing that is irritating you?

Side note, I haven't seen a wiring diagram that shows the ECU does anything like you are describing. My guess is that more than likely it's simply the fact that when the A/C is on, the compressor cycles on/off as needed anyway so the faster the engine spins (stepping on the throttle), the less time it needs to be on. Thus, it could give the illusion that it shuts off with throttle simply because the engine speed is increasing. I suppose it could be doing something internally since the ECU is involved in the process, but the wiring doesn't show anything out of the ordinary, and nothing in the ROM files I have seen imply that it does this either.

~T.J.

Last edited by 02CWRX; 07-24-2012 at 02:24 PM.
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Old 07-24-2012, 02:24 PM   #4
Mulder
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The compressor clutch is in fact controlled by the ECU in addition to the thermal switch in the evaporator. So in addition to the normal cycling, it will cut out at WOT as well as above a certain RPM and also outside a set ambient temp range. This is done partially to maximize engine performance under hard acceleration, but also to protect the compressor from overspeed and other conditions that could damage it. Just about all AC-equipped vehicles do this as well, you really don't want to defeat it.
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Old 07-24-2012, 06:49 PM   #5
hybrid gti 2
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Interesting. I just wanted more a/c more of the time.
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