97 KA o2 Sensor wiring - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

XeroX · 04-06-2010, 02:27 PM

I am putting a KA out of a 97 S14 into my 510 and im running into a snag.

It seems that for watever reason the o2 sensor harness from the main engine loom was cut, leaving me with 3 wires. I have the o2 sensor and it seems to have 2 white wires and one black wire. I would LIKE to run an o2 sensor but i cannot seem to find out what wires on the o2 sensor go to the 3 different colored wires on the engine harness...

I am assuming that black wire is o2 and the two white ones are heated shit, does polarity matter? Im pretty sure all i need is signal to the ecu since this is going into a 510...but im not sure

Any input is GREATLY appreciated

projectRDM · 04-06-2010, 09:42 PM

On the harness side, the brown wire is the heater power. You can just buy a one wire sensor and tie it the shielded lead which is the signal, it's a black insulated wire, silver shielding, white wire inside.

XeroX · 04-06-2010, 10:08 PM

What confuses me is that I can't seem to find a shielded wire anywhere on the main harness..all I found was those three snipped wires from the PO...are u saying the shielding is farther down in the loom? I have access to a single wire o2 and the harness but I'm still unsure where the shielded wire is on my main harness ughh

XeroX · 04-07-2010, 03:05 PM

So again, i dont want to find look for a one wire o2, i have a 3 wire o2 sensor waiting. I just need to find out what wires on the o2 sensor i should hook up to the cut wires on my harness...

Anyone?

az_240 · 04-07-2010, 03:14 PM

You sure you have a 97? They have 4-wire O2s. 96s use the skinny 3 wire O2s. I have a skinny 3 wire for sale if you are interested. $20 shipped.

I have a 97... I can check what color wires go where if you'd like... but they might be different since you say you have only 3 wires.

projectRDM · 04-08-2010, 09:02 AM

Quote:

Originally Posted by az_240

You sure you have a 97? They have 4-wire O2s. 96s use the skinny 3 wire O2s. I have a skinny 3 wire for sale if you are interested. $20 shipped.

I have a 97... I can check what color wires go where if you'd like... but they might be different since you say you have only 3 wires.

That's the rear O2 sensor, he's not talking about the rear.

OP- the shielded cable isn't very far back from the plug, the white wire is only a few inches long before the shield covers it.

XeroX · 04-08-2010, 10:21 AM

Quote:

Originally Posted by projectRDM

That's the rear O2 sensor, he's not talking about the rear.

OP- the shielded cable isn't very far back from the plug, the white wire is only a few inches long before the shield covers it.

Im a tard, the white shielded wire was infront of me the whole time!

But regardless all i do is hook up that to the black wire on the o2 sensor. and then run the other two (brown and green) to the two white wires on the o2 sensor. Like i mentioned before, it should be safe so say that polarity does NOT matter when hooking up the two....right?

04-06-2010, 02:27 PM	#1
XeroX Zilvia Junkie Join Date: Jan 2009 Location: Sacramento, CA Age: 37 Posts: 307 Trader Rating: (2) Feedback Score: 2 reviews	97 KA o2 Sensor wiring I am putting a KA out of a 97 S14 into my 510 and im running into a snag. It seems that for watever reason the o2 sensor harness from the main engine loom was cut, leaving me with 3 wires. I have the o2 sensor and it seems to have 2 white wires and one black wire. I would LIKE to run an o2 sensor but i cannot seem to find out what wires on the o2 sensor go to the 3 different colored wires on the engine harness... I am assuming that black wire is o2 and the two white ones are heated shit, does polarity matter? Im pretty sure all i need is signal to the ecu since this is going into a 510...but im not sure Any input is GREATLY appreciated

04-06-2010, 09:42 PM	#2
projectRDM Post Whore! Join Date: Dec 2002 Location: Atlanta Age: 47 Posts: 13,812 Trader Rating: (12) Feedback Score: 12 reviews	On the harness side, the brown wire is the heater power. You can just buy a one wire sensor and tie it the shielded lead which is the signal, it's a black insulated wire, silver shielding, white wire inside. __________________ FORMERLY R240NA Learn what's really going on and protect your assets now before they're gone forever: www.paypalsucks.com

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04-06-2010, 10:08 PM	#3
XeroX Zilvia Junkie Join Date: Jan 2009 Location: Sacramento, CA Age: 37 Posts: 307 Trader Rating: (2) Feedback Score: 2 reviews	What confuses me is that I can't seem to find a shielded wire anywhere on the main harness..all I found was those three snipped wires from the PO...are u saying the shielding is farther down in the loom? I have access to a single wire o2 and the harness but I'm still unsure where the shielded wire is on my main harness ughh

04-07-2010, 03:05 PM	#4
XeroX Zilvia Junkie Join Date: Jan 2009 Location: Sacramento, CA Age: 37 Posts: 307 Trader Rating: (2) Feedback Score: 2 reviews	So again, i dont want to find look for a one wire o2, i have a 3 wire o2 sensor waiting. I just need to find out what wires on the o2 sensor i should hook up to the cut wires on my harness... Anyone?

04-07-2010, 03:14 PM	#5
az_240 Post Whore! Join Date: Jan 2006 Location: Phx Posts: 3,097 Trader Rating: (41) Feedback Score: 41 reviews	You sure you have a 97? They have 4-wire O2s. 96s use the skinny 3 wire O2s. I have a skinny 3 wire for sale if you are interested. $20 shipped. I have a 97... I can check what color wires go where if you'd like... but they might be different since you say you have only 3 wires.