Alllmost done my B18B1 swap into my 97 hatch. Just want to double check here...

The engine I have is from a 2001 integra, and has a 3 wire CKF (crankshaft speed fluctuation sensor) and connector... But my Y7 harness (which is MOSTLY plug and play), has a 2 wire connector.

Both connectors have yellow wire and a green wire, but the 2001 B18 has a third wire (black? brown? maybe a thin white stripe? not sure.).

I have to extend the B18 CKF plug wires anyway, so my thought was to chop off that 3 wrie plug, splice into the Y7 plug with only the yellow wire and green wire, and simply disregard the black.

Will this work? My guess is the black wire is a ground wire and was added as an "improvement" on the earlier sensors?

Any help here is appreciated.

 

Ah, my initial question was full of fail. Even the question has a mistake. "3 wire, 2 pin?"

To clarify:
2001 B18B1 OBD2B has a 2 wire CKF and 2 pin connector. (blue and white)
1997 D16Y7 OBD2A has a 3 wire CKF and 3 pin connector. (blue, white and black)

I used the connectors from the Y7, and disregarded the black wire on the B18 side. I have no idea if this will work, though my research looks positive, I can't find a clear answer. If it doesn't work, I'll just do the "CKF trick"...

It is clear the black wire is a ground wire, but I just don't know if it will work without it. As I understand it, the 3 wire CKF's have an internal ground, and the 2 wires don't. I just don't understand if this effects the ECU signal or not.

 

And, finally found the solution here. I've been intimidated to look at pinout diagrams, but once I started looking it got easier to find the answers and understand what was going on. This also explained the IACV problem a little better, but it's an easy fix.

"If re-using a CX or DX engine harness, the CKP (crank sensor) has one too many wires for this specific sensor (3 total). Any U.S. 96+/OBD2 DOHC engine has a 2-wire CKP sensor. Simply color match the wires up from the DOHC CKP sensor and leave the 3rd wire disconnected."

I had been cutting and splicing wires, but HondaPartsHero has a better idea here. (depinning connectors)

 

https://honda-tech.com/honda-civic-d...-wire-2876493/

 

ha ha, thanks man, but I'm way ahead of you. (i linked to that in my last post)

nice write up by the way! thanks for taking the time to do it.