O2 Sensor wiring question

[Qualitywires.com]

I am looking for the Heater Power and Heater ground wire from the O2 sensor.

There are 4 wires coming from the O2. Two are white, one is grey and the other is black.

The wires are numbered 1, 2, 3, 4 on the back of the harness.

Any idea which one is heater Power and Heater Grd? I don't have the book to look them up.

Thanks

 

[txlen]

what car??..which sensor??...Len

 

[Qualitywires.com]

oh, sorry...the upstream O2's by the headers left side. I think they are all the same.

 

[txlen]

so..#1 upstream???..lemme look....your 98 GTS??

 

[txlen]

LEFT UPSTREAM HEATED OXYGEN SENSOR CAV CIRCUIT FUNCTION
1 A142 16DG/OR AUTOMATIC SHUTDOWN RELAY OUTPUT
2 Z1 18BK GROUND
3 K4 18BK/LB SENSOR GROUND
4 K241 18LG/RD LEFT UPSTREAM HEATED OXYGEN SENSOR SIGNAL

try this....

 

[txlen]

lemme know if this helps...ok??..Len

 

[Qualitywires.com]

yes.
I need to put a 20 ohm and 10 watt resitor there to put a load on the circiut so that the ECU will think that my linear 02 is working while I am using my wide band O2 sensor is the one that is working.

From my wideband O2, it sends a linear signal to my ecu while I can read the wideband signal on my digital display. If I don't put a load on the power heater and heater ground the car thinks that the stock o2 is bad or not connected so it throws a code of P0171.

 

[Qualitywires.com]

Thanks Len.

I'm still a little confused..should I use #3 and # 4 with the resistor?

 

[Qualitywires.com]

If I can't find the right connections, I bought a 2nd O2 **** and I will just have to put the stock one back and use the 2nd for my wideband O2 read out.

 

[txlen]

ok...#4 goes back to the ECU...#3 is jus sensor ground... if you need to put it on the ground side use #3....#4 is heater power..#2 is true ground...so put it on #3 if thats what you're looking for...

 

[Qualitywires.com]

so it would be number 2 and number 3 right?

 

[txlen]

yep!!..#2 is true grd and #3 is sensor grd....

 

[Qualitywires.com]

Thanks a ton!

One more question for ya...is #3 ground the same ground wire in the ECU? What's the difference in the ecu ground and the other?

 

[Qualitywires.com]

I was looking at my diagram and the wires I need are the ones that heat up the O2. I have to put a resistor between those two.

Thanks for your help. You got a paypal account so I can send ya a tip!

 

[txlen]

sooo...you need to put it between #1 and #2..

 

[Qualitywires.com]

heh! heh! So #1 and # 2 are the wires that heat up the O2's? That would be the Heater Power and Heater Ground?

 

[txlen]

yep!!...you got it!!...the others are sensor grd and sensor power.......lol...Len

 

[Qualitywires.com]

Thanks Len!

Yeah , I was wondering about that. I thought #4 was in the input signal to the ecu which I think is pin #24 or 26 on the harness..not sure unless I looked at it. You rock man with your quick answers!!!

 

[txlen]

lol..no prob..any time!!...good luck and let me know how it works out....Len

 

[Ted Bigham]

How did this work out for you? You two lost me with the numbers but I assume you just put your resistor between the two white wires. Right?