Does anyone know what the ECU's role in the aircon wiring is?

I assume it switches it off at full throttle, and maybe at high revs too?

I also know the a/c switches off at high coolant temps. Is this done by the ECU, or by one of the black boxes plugged into the a/c loom?

Not sure, but one thing I do know for sure is that mine doesn't switch off on full throttle.

I cant see the reason why it would switch it off at full throttle? I know it may sap a few bhp but no modern car i know of disengages it when the car is being hammered

I'm pretty sure quite a lot of cars switch it off at full-throttle. They usually switch off at high revs too - not because of the power loss, but due to the fact that most a/c pumps are rated at max speeds of 4000-5000 rpm.

Good point. Trouble is it's hard to tell at 6000 rpm what it's doing.

Well unless it was faulty it didnt turn off in my old ITR and im fairly sure it didnt turn off on my mates CTR.

Ill have a gander about on the Honda forums tho as when i was in the VTEC zone the last place i tended to be looking was at the Air Con button

Same here. If I'm cruising along in a 30 mph area in 4th gear and switch the aircon on you can feel the pull as the a/c compressor clutch engages but at higher revs it's hard to tell. I'll check in the summer to see if the air remains freezing.

Did you have an integra before then Rob?

Yup for just over 5 months then it had to go. Ive done to bad for someone who is still at Uni. ITR, 2 205's, New Civic Derv. Sold them all though now . Im now a debt free student though which is pretty rare i think.

I want to ask you lots more questions but I won't because I've noticed I'm going very off topic alot in this forum!!!

well add him to your msn and chat all you want then .

Ooh err I've been told!

Anyone got a wiring diagram handy?

Would a pug dealer give me a copy, or are they top-secret, need-to-know, i-could-tell-you-but-I'd-have-to-kill-you...

Ok, as far as i am aware, on models with air con, the compressor is switched off at full throttle. This was certainly true on the 1.9 models, and im 90% sure it is the same on the 2.0 models as well.

One way to find out for sure would be the rolling road.