w1ngman

So as a result of some diagnostics, it would seem I'm in need of replacing my ECU on my 2001 AP1 S2000. With over 325K miles on it...okay, I guess it is time. However, back ~ 40K miles ago, I purchased a 'complete pull' (tranny/engine/ECU) AP1 w/ ~ 35K miles on it. The motor assy came from a Japanese Domestic S2000. At the time I'd swapped the motor/tranny, I ended up re-using my OEM USDM ECU and all wiring harness, because the damned JDM ECU's harness didn't include a connect to the AP1's VTEC solenoid.

Presently, after some diagnostics, my Honda mech which I trust implicitly over the years working with me on my car, suggested today that he believes the ground is faulty on the ECU and that it needs to be replaced. So, before I go buying another one...while I have a perfectly 'young' used one in my garage, the question of the day would be: Can my JDM ECU be a modular 'simple swap'?

Anyone with experience on this matter, your comments are highly welcome!

Best Regards,
Dave

only9k

Well, the JDM ecu has one problem that I know of. One is that the fuel pump wire is not the same as on the USDM. Meaning, if you connect and start it, then it will use the pressure in the fuel line and then die. So I know that you have to move a wire here and there, but nothing complicated. There must be a pinout diagram you would probably have to follow I'm guessing.

Also, since I also have a JDM engine, but a USDM ECU, I don't know if VTEC Engagement will cause a problem since I know the USDM wiring harness has an extra plug that a JDM VTEC Solenoid does not have a port for.