R33 tune now no a/c

[jSbr0]

R33 tune now no a/c

So I've had a good search around and can't find much info on this. Basically i had my car tuned 2 weeks ago and it seems that the tune or whatever has been done has stopped my a/c from working. Could this be true? I had a auto elec have a look and he checked everything! and was confused as to way the compressor would not kick in unless it was earthed and the gas was spot on. I told him that its running a aftermarket ecu (powerfc) and he suggested that something could be wrong and it seems to be ecu related. I did a sensor check and its showing 0v Could it be something related to the powerfc? 

 

[admS15]

Im not familiar with the software for power fc and not sure if the ac could be disabled from there, maybe someone else can chime in there but when I had a similar issue with my ac compressor not kicking in, it turned out to be the thermistor which is a temp sensor that sits in the ac core and tells the compressor when to turn on and off. Was just a bad contact on the plug. cleaned it, put it back together and has been fine since. This particular plug can be accessed by removing the glove box and backing plate, it is mounted to the top left of the white box, Its a bit tight but reachable. Should only take 5-10 mins to get to it and check.  As far as the ecu goes, maybe give your tuner a quick call and ask.

[Hadouken]

Happened to me when I had a powerfc.

I was told it was a setting in the ecu.

Talk to the tuner.

[jSbr0]

I had thermistor out to have a look and left it all apart so the auto elec checked that and said it was getting a signal Still doesn't mean its working i guess? Going to hit the tuner up today and see what they say. Cheers 

[admS15]

Yep talk to tuna and go from there.

[89CAL]

I dont recall a setting to turn off the AC on fc edit. There are settings for idle when AC is on or off but that's about all i remember.

Go into sensor/sw check on your hand controller and watch the AC and ACR dots. I think (and I could be wrong) that one indicates the AC unit is turned on and the other should come on when the compressor kicks in. (On is black dot off is white dot)

[kingtube69]

Had a mate with the same problem when he had his PFC tuned. Took it back and the tuner sorted it out. 

 

[jSbr0]

Had my tuner hook his laptop up and we had a look around. The only option to do with a/c was revs when its turned on. Had a play around today with a test night on the ecu when i tried pin 9 (ac relay) the compressor fired straight up. Waiting to try another thermistor  

[jSbr0]

So i tried another thermistor out of a wreck and no go. Ive found that pin9 (ac relay) Goes through the fog light relay when checking continuity So fingers crossed its the cause. Now to find another relay..

[Hadouken]

Do you still have the standard ecu?

I bet if you whack it in the a/c will work.

But then again you probably have different injectors and it won't idle very good.

[jSbr0]

Nah i dont have it. That did cross my mind 

Edited February 7, 2017 by jSbr0