I've done a NA to jdm turbo swap on my friend's S5 using the jdm engine harness and Rtek 1.5 chipped N374 ecu. As expected, the n374 didn't fire the rear rotor but the Rtek completely solved that issue and it ran fine afterwards. The swap was amazingly easy.

Anyway, the jdm harness was intact except it was cut at the pressure sensor wires. I've wired it up to what I think is right, but there's four wires where it is cut, and from my understanding the n370 pressure sensor only uses 3. The colors seem to be different on the jdm harness so studying the US FSM hasn't helped much.

I just need a photo of the pressure sensor plug on a jspec S5, so I can see the wire colors
I would greatly appreciate it if someone could post that for me. Thank you.

 

USDM S4's had four wires; ground, battery voltage w/key to on, Vref of 5 volts w/key to on and the last wire was an output wire going to the ECU. The USDM S5 does not use the battery voltage wire but rather the other three wires. Maybe this helps a bit.

 

Still looking for a pic to confirm my wiring. Anybody?