Upstream O2 Sensor - Help Needed
 

So My 2001 Tibby Upstream oxygen sensor harness connector got destroyed. I need some help here in figuring out which of the two wires coming from the ecu is the signal and which is the ground. I already figured out the heater wires and I've connected them. So what I'm left with is the two wires that are in a brown insulated cover. These two are yellow and brown in color (see pic).


I did went to the junk yard and got and Elantra connector since no tibby was there. The thing is that the colors are different so I couldn't match them. The ones on the Electra harness connector is green and white.


Can anyone here help?


Thanks,


Tony


https://ibb.co/dvp3Ne


https://ibb.co/noXCFz


https://ibb.co/mMHUvz

If you can verify continuity hopefully you will find the ends of your wires on pins 12 and 40 of the ECM connector.

A bad picture but it's from the manual Engine Control System Schematics (also FYI the rest of the shop manuals are at newtonnet.co.uk)

Better but as always beware the color codes may vary (as you found out already) https://i.imgur.com/cUUWvJo.png