B18c O2 sensor plug came off of engine harness!!
 

The engine harness I'm using is unknown, I have a b18c swapped into an EF. The O2 sensor is a 4 wire sensor, white, green and two blacks. The four wires coming out of the harness are purple, grey, tan, and I think pink.. Anyways, I tested the four harness wires and got the hot 12v wire identified... Leaving three wires. I'm not sure which one is the signal wire and which two are the grounds... and I also don't know which points go in the plug and can't find a diagram. Please help.

Re: B18c O2 sensor plug came off of engine harness!!
 

Can you Post pics of the ecu plugs? I can tell you what wire is what by looking at the ecu plugs and will tell you where in the O2 plug they go.

Re: B18c O2 sensor plug came off of engine harness!!
 

Get under the dash and pull the plug and take a pic? If I get the hot wire to where it needs to go, I believe I can just mix and match the other three till it's right?

Re: B18c O2 sensor plug came off of engine harness!!
 

https://cimg2.ibsrv.net/gimg/honda-t...da065d0f6c.jpg


https://cimg3.ibsrv.net/gimg/honda-t...80c0f1527d.jpg


https://cimg5.ibsrv.net/gimg/honda-t...1045a608a6.jpg

Re: B18c O2 sensor plug came off of engine harness!!
 

The female plug looks to say dpfi z6/D15

Re: B18c O2 sensor plug came off of engine harness!!
 

Re: B18c O2 sensor plug came off of engine harness!!
 

Top of connector (backside)
|(1)(2)|
|(3)(4)|

1. Signal
2. Ground
3. 12v switch (hot)
4. Heater/ecu

Does this seem right???

Re: B18c O2 sensor plug came off of engine harness!!
 

https://cimg0.ibsrv.net/gimg/honda-t...483af1a90c.jpg


Crappy pic but these are the harness wires for the O2 sensor.. Yellow(12v), purple, pinkish orange, and a thicker insulated white wire.<br/><br/>

Re: B18c O2 sensor plug came off of engine harness!!
 

Using the pic below. This is looking at the back side of the O2 plug where the wires go in.

Top left=signal d14 at obd1 ecu plug

Top right= sensor ground d22 at obd1 ecu plug

Bottom left =power

Bottom right=heater ground a6 at obd1 ecu plug.

This is the female plug that goes on the engine harness. I can't tell from the pics you post where the wires are going to tell you what wire is what. You can trace the wires from the obd1 ecu plugs to see what color wire does what and then put it in the plug where it needs to go.

http://i1286.photobucket.com/albums/...psehyqtbkc.jpg

Here's a pic of the obd1 ecu plugs showing where the numbers are to make it a little easier for you.

http://i1286.photobucket.com/albums/...psfsae90si.jpg