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My A/C would only work on speed 1 and sometimes 2. I followed these instructions. R12 feels amazing.
Category Five Motorsports
Power-FC A/C MOD
This mod will enable your air conditioner to work when installing a Power FC in FD3s. This will also fix the problem of the a/c not working on one or more of the fan speeds.
The reason the a/c does not come on is because as the car ages, the ground signal going to the ECU’s (wire 1E) is receiving a fuzzy ground signal. Some cars have no problem with the signal, but some do; the last FD I worked on the a/c did not work on any speed. My mod will interrupt the signal going into the Power FC and redirect it through a simple Bosch relay. This will also let the Power FC still control the IAC and switch the a/c off at wide open throttle.
Locate wire 1E (Violet wire) - it is the third wire from the end on connector one. Cut the wire 2” from ECU. On the harness side you will hook 1E to (86). On terminal (85) on the relay will go to ignition +. Terminal (87) will go to 1E that was cut on the Power FC side. Terminal (30) will go straight to chassis ground. Now when your a/c is turned on, it will receive a nice healthy ground. If you have any questions contact me via email.
have you ever encountered this . I'm trying to figure out if this is the power FC , or some other underlying issue
my fans work at all speeds . BUT my AC controls DO NOT WORK I cant switch hhere the air comeso ut , I cant turn on the AC nothing lights up when I press the AC button , or the recirc button , nothing works I thought it was a faulty control unit so I tried another one form a friend that was working and nothing did hte same thing . its as iff its not even recieving any power , the hazard lights work , and the cluster dimmer works . the fan speed works , but the temp , nor the directional flow controls work .
I'm wondering if this is caused by the Power FC . or if this is another underlying issue ..
I've checked all the fuses they seem to be good . I'm going to check the relay hope the relay has something to do with the controls .
Oh also I tested all the equipment manually using a test light nad they ALL OPerate
so its not that they are broken
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93 rx7 , Stock ported motor , stock twins ,Custom FMIC , full exhaust , apexi intake , (PFC ), 1300 secondaries , Aquamist 2d AI system running 40/60 meth2water , Greddy elbow . 297 @ 13 psi
Also my little fuse cover lost the label , I thought I read one fuse that said hazard /ac in whats left of the paper . But Now I'm doubtful . as I'm reading the FSM , Wiring diagram , Z68 , it says that the rear Wiper fuse is what feeds power to the AC controls ? is this correct ?
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93 rx7 , Stock ported motor , stock twins ,Custom FMIC , full exhaust , apexi intake , (PFC ), 1300 secondaries , Aquamist 2d AI system running 40/60 meth2water , Greddy elbow . 297 @ 13 psi
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93 Black Touring; FMIC, NS Twins, Power FC, Datalogit, Wideband O2, this that and the other things.
88 GTU Complete Turbo swap w/ LTX-8 (sold)
86 GXL, Ported (Sold)
86 Sport, Ported (RIP)
"On terminal (85) on the relay will go to ignition +." Is there a certain location or color I'm looking for? Just want to confirm and clarify. Thanks. Would be nice to have all 4 AC settings, than just setting 1, lol. Thanks again.
I use one of those Greddy turbo timer harnesses that have a few wires hanging out. One is switched ignition that I use for my water injection, the other is Hot and I used that for the relay.
Air conditioning FIX
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Linear Mode
