This is where the difficulty comes in. The outputs are all listed on the UA4C board, and I assumed it would be a matter of looking up my ECU pin outs, matching up wires, and connecting. I found a couple different partial pin outs, from which I've been able to piece together most of the required connections. My problem is when it comes to pins that I see on my stock ecu pin outs that I can't figure out how to place on my speeduino.
For example, following the pin outs I found here: https://www.flyinmiata.com/support/inst ... rewire.pdf, I've identified pin 1H on the stock ecu as "Headlight switch". What I can't decipher is if this is an extraneous input that my stock ecu was using and my speeduino won't, or if it's something I need to connect elsewhere to some proto circuit.
I'm sorry that this is a pretty broad question, if I need to get more specific please let me know, I'd be glad to. Thanks in advance, love the open source life.