I have a 98 civic ex harness that's going into my b16 swapped 97 civic and I've extended all the wires I need to and its ready to go. here's where my issue is, I have a manual power steering rack and the last plug on my harness is for the power steering pressure switch (green and black wire, round plug) so i have my ait sensor with nothing hooked up to it, can I de pin at the ecu end of the harness and move pins to make it a functional sensor? I need to pass inspection with no check engine light.

 

Moving the wires at the ECU wouldn't work as well as you might think because the grounds for the PSP and the IAT are different types. You should have a black square two wire plug for the IAT, close to the MAP sensor plug, over near the throttle body... the wire colors are red/yellow and green/black. I would trim the PSP plug off where it comes out of the engine harness and tape it up, then clip off the black square plug of the IAT sensor right at the plug. Finally, connect the black wire of the PSP plug to the green/black wire and the green wire to the red/yellow wire. Plug it into the white IAT sensor shown in your photo. Pull the ECU and Backup fuses in the under hood fuse box to reset the code 10. Restart the engine... if no codes, go to inspection.

 

After i made this post i got thinking, im so dumb the IAT sensor on my IM is obd1, im running obd2 so i only need to use the black one. smh. anyways your right about just removing the power steering plug so i already have the harness all apart so i removed the green pin from the connector that goes into the ecu just so the whole power steering wire is gone, i dont plan on ever having power steering in this car, since i removed the green wire compleatly is it okay to cut the black wire and just put shrink tube around the end? the black wire goes to the connector on the back of the harness, also could someone explain to me in simple terms what the two plugs are on the back of the harness? wires go to them but they do not plug in anywhere, its the same on my crv as well.

 

It is OK to cap either or both wires from the PSP plug. If you want to keep it just in case, you can simply tape it back and wrap it to the main bundle. The two large plugs under the intake manifold on the engine harness are actually distribution points. Two power and two ground distribution points to be more specific. Basically, you have one wire coming in from the source and up to seven wires going out to various sensors or devices. Since you stated that you unpinned the gray plug and the green wire back at the ECU to guarantee no signal short, you can also find the black wire in the distribution block by pinning for continuity after removing the distribution cap and probing the black wires until you find the appropriate end.

 

wow very helpful, thank you very much you guys are the pros 👍🏻