Got a quick question. I got my P28 ECU that had been converted internally by Hondata (no adapter harness needed) so it connects directly to my OBD 2A wiring harness. I'm wanting to use Nitrous/Aux 1 to control water/meth injection. How do I match up the outputs listed in the Aux 1 drop down list with my OBD 2A wiring harness? It lists A10 as an extra output but A10 is the power ground on my OBD 2A harness. All the inputs and outputs are different.
Thanks
Wiring harness question
The best bet would be to remove the lid, and use multimeter to trace the pins form the OBD1 side to the OBD2 side. Use the following OBD1 pinout: http://www.hondata.com/techwiringgsr.html