Man, I thought I had my fan problem figured out when I removed my intercooler and intercooler fresh air duct and found 2 wires (green and black) on one of the fans wore down past the insulation right at the base where it meets the fan motor itself. And even the other motor had 1 wire (blue) wore down past the insulation and was touching the fan motor! All this was caused by my ASP medium intercooler duct rubbing against it causing at my fans to not come on high speed, and then when I turned my A/C on blow the fuse for the fan motor!

Well, after I taped up where the wires were wore through, the fans come on high when I put the A/C, but they still don't come on high by themselves when the temp gets to where they should come on. I'm hoping it's not a PFC problem cause it used to control the fans just fine. But now they only come on high when I put the A/C on, so I figured all the relays are good? Anyone have any advice, I'm open to all suggestions. Thanks, Jerry

 

What makes you think all your relays are good? The relay(s) that turn the fan on due to temperature is different than the relay(s) that turn the fan on due to A/C. The fan actually has 4 speeds, and the A/C doesn't turn the fans on "high speed".
Check the FSM circuit diagrams carefully to figure out which relay turns the fan on to what speed.

 

I figured the relays were good cause according to this diagram: (http://www.scuderiaciriani.com/rx7/fan_circuit.html) the fans come on high when all 4 relays are on and the A/C is turned on, snd it still does. My PFC used to turn the on high at like 89 or 90 and now it won't turn them on high at any temp!

 

The radiator fan motors are controlled by the relays (which are controlled by the ECU, which sets the speed according to both coolant temp and A/C). The relays need to be activated in sequence to determine fan speed (of which there are only three, AFAIK). High speed requires that all four of the relays are activated, so it's safe to assume that they're all working.
EDIT: Whoops, nevermind. Slow on the draw....

 

Well one of the things that does concern me is when I shut the car down and the temps rise to like 95C and it sounds like the fans are still on medium, if I pull up on the intercooler air duct I can hear the fan's speed pick up a little (not quite high speed). The problem I found before was the air duct rubbing and wearing some wires down past insulation on the fans motors. Almost seems like with the duct sitting on those wires it's pinching the wires to where the motors can't get enough current, but I know electricity doesn't work that way(like a water hose).
I'll keep checking, but that seems to be a concern of mine and I should figure it out before it gets worse.

 

After shutting off an FD with the recall performed, you'll only get medium speed at most. When the coolant temp reaches 226F, it closes relay #3, switching from low to medium speed.

And if you are really seeing all three fan speeds when it's running, your relays are fine.

 

I'm only able to see high speed if I use the A/C. I'm almost positive my PFC is set to have the fans come on high at like 89C or 90C, and they used to come high after the car is shut off and the temps rose up past 90C but now they will not. Maybe I'll get the datalogic so I can confirm everything is still the same.

 

i to have the same problem but fans only work when i turn on the ac button(i had my ac lines removed do to a bronken line) also my stock temp gauge does'nt work or even speedo for that matter.............=(

 

SRA-FD3S, do your fans come on at all without the A/C? If not you might want to check out the thermoswitch.

 

or the connection to the thermoswitch....

 

Ummm...maybe I'm off base here but aren't you guys missing something?

The thermoswitch controls activation of one of the relays, right? And the stock thermoswitch doesn't switch until 108C coolant temp? So...am I wrong in thinking you should never see high unless you hit 108C and the A/C is on?

 

Actually your right, if you still have a stock ECU. I have the Power FC which can be reprogrammed for different settings, including what temperature all 3 fan speeds (low, medium and high) are set to come on. KD rotary programmed mine and I know they were set to come on high around 89C or 90C. But now they won't come on high at all, so I know there is at least something not right.

I might get the datalogic software to confirm the exact temps for the fans but I'll be shocked if somehow they reset to something higher than before because nobody has done anything to my car since I brought it back.

 

The PFC only changes the temps at which the relays operate - they still function exactly the same as they did on the stock ECU.

It's probably a wiring problem. That would be consistent with the problem you were having before, where you had a short to ground that blew your cooling fan fuse. Now, since it reaches high speed when the AC is on, you know the relays and fan motors are working. So it must be on the control side of relay #1, but on a path to ground separate from the AC switch.

Also, on a car with the recall performed, once the car's turned off, you're not going to get high fan speed unless you modified the wiring.

 

I your probably right DigDug, it has to do with the wiring to the fan motor itself. I noticed they pick up speed when I pull up on the IC duct, and slow down when I let it back down (car off, key still in ignition). The 2 wires that were worn on the one fan (black and green) might still be touching as they were worn down to copper right at the base, where they go into the fan motor.

I think I'm going to have to find some way of putting some kind of spacer (grommet or rubber stop) between the IC duct and the fan motor to keep it from putting pressure and rubbing those 2 wires. Today the temps got up to 96C and it wasn't even hot out today, and I wasn't even driving the car that hard.

Big thanks to everyone with input on this, this problem seems little but could probably turn big if I ignore it.