So, apparently when you swap a S13 SR (and of course, the ECU) into a S14 chassis, you have to jerry-rig your a/c by directly connecting some wires. It has nothing to do with the Nismotronic. Using the info from these threads, I was able to get the A/C working this way, along with the e-fans:http://forums.nicoclub.com/how-to-ac-in ... 40273.htmlhttp://zilvia.net/f/showthread.php?t=59047http://zilvia.net/f/showthread.php?t=293720
But this is not how the A/C was meant to operate. In the Nismotronic software, there are pre-defined variables that shut the compressor down if RPM is over 5000, if TPS is over 70%, and if temp is over 230*. If I bypass these things, that can't be good for the life of my A/C system if something were to go wrong. I wish there was another solution, but this may be all I have.
As for controlling the fans, apparently this is only possible on FWD ECUs, which I don't have. BUT, there is another possible solution. There are two programmable generic outputs that you can set to control a switched ground signal. (Big thanks to OnTheChip for that info on the output signal). These outputs utilize unused ECU pins and I have 3 options that I could use. There are parameters that you can set up to control exactly what conditions will trigger the output, including engine coolant temperature. So, I believe that I should
be able to control a fan this way. However, I have tried programming several different outputs to trigger at certain temps and I am not having any luck so far. Getting the fans to work is what I need to get back on the road.
My buddy who is just a wiz with anything electronic is supposed to give me a hand tomorrow. Hopefully he'll see something I don't and we can at least get the fan control working, and I guess I'll leave the A/C jerry-rigged (unless I can figure out another solution).
I e-mailed John@j-k-tuning.com
with some questions about this but haven't heard back yet. Hopefully he'll get back to me soon.
Here's a page from the manual that shows the programmable output conditions. It will be pretty cool if I can get it to work because I can program other variables, such as vehicle speed, to define when the fans come on. For example, I imagine the fans don't do a whole lot of good if you're going anywhere above 55 mph, so I can have them shut off when the speed exceeds that.