O2 sensor wire colors? O2 simulator install
#1
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O2 sensor wire colors? O2 simulator install
I am trying to install an O2 simulator for the secondary rear l/r O2 sensors. '99 CA-spec. The O2 sensor has 4 wires: 1 black, 1 gray and 2 whites. According to the simulator instructions, the black wire is signal, the gray wire is ground and the two white wires are either the heater signal or 12V power. Can somebody confirm that the black is signal and the gray is ground for our Maximas???
And can you guys help me figure out which of the two white wires is the 12V signal (and which is the heater signal)??? Please do not suggest turning on my car and using a volt meter - my car is completely taken apart for my header install. In looking at the O2 sensor plug below (this is the plug on the car-side), could you guys tell me which number is 12V and which is the heater signal? On my car 1 leads to the black wire, 2 to a white wire, 3 to a white wire and 4 to the gray wire. By referring to the numbers, could you please tell me what function each number performs? Thanks.
__
--------
| 1 2 |
| 3 4 |
--------
(Looking at the O2 sensor plug, car-side, terminal view)
And can you guys help me figure out which of the two white wires is the 12V signal (and which is the heater signal)??? Please do not suggest turning on my car and using a volt meter - my car is completely taken apart for my header install. In looking at the O2 sensor plug below (this is the plug on the car-side), could you guys tell me which number is 12V and which is the heater signal? On my car 1 leads to the black wire, 2 to a white wire, 3 to a white wire and 4 to the gray wire. By referring to the numbers, could you please tell me what function each number performs? Thanks.
__
--------
| 1 2 |
| 3 4 |
--------
(Looking at the O2 sensor plug, car-side, terminal view)
#2
IMO, those wires after the harness are a pain because they are slippery and difficult to tap/solder. Its just easier to tap into the wires before the harness.
Here's a write-up I did for the CALI spec 5th Gens so you can see what I'm talking about:
http://forums.maxima.org/showthread.php?t=468152
It was also much easier figuring out ground, power, and signal that way because the wires were all different colors.
Here's a write-up I did for the CALI spec 5th Gens so you can see what I'm talking about:
http://forums.maxima.org/showthread.php?t=468152
It was also much easier figuring out ground, power, and signal that way because the wires were all different colors.
#3
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Originally Posted by Puppetmaster
IMO, those wires after the harness are a pain because they are slippery and difficult to tap/solder. Its just easier to tap into the wires before the harness.
Here's a write-up I did for the CALI spec 5th Gens so you can see what I'm talking about:
http://forums.maxima.org/showthread.php?t=468152
It was also much easier figuring out ground, power, and signal that way because the wires were all different colors.
Here's a write-up I did for the CALI spec 5th Gens so you can see what I'm talking about:
http://forums.maxima.org/showthread.php?t=468152
It was also much easier figuring out ground, power, and signal that way because the wires were all different colors.
After all our research, and then looking at your link, it all confirms what we found out and makes perfect sense.
As far as where to tap, I'm hesitant to cut the main wiring harness. On the flip side, I'm cutting a perfectly good O2 sensor. I will definately take into considering what you said about the difficulty of taping the O2 sensor wires vs. the main harness wires. Thanks again.
#4
So, which of the white wires is power and which one is heater signal? You said you've figured it out, but you've never bothered to expalin your find here. Can you elaborate? I'm about to do an O2 job for my GF's Maxima, conveniently, I'm also seeking an answer here.
-Peter-
-Peter-
#5
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Originally Posted by GodFather
So, which of the white wires is power and which one is heater signal? You said you've figured it out, but you've never bothered to expalin your find here. Can you elaborate? I'm about to do an O2 job for my GF's Maxima, conveniently, I'm also seeking an answer here.
-Peter-
-Peter-
I was going to create an in-depth how to, with pics. But, since you're hungry for the information, here you go....
Looking at the wires directly behind (and connecting to) the O2 sensor, arrange the wires so black is at the 12 o'clock position, grey is at the 6 o'clock position, and the white wires are at 3 o'clock and 9 o'clock. The white wire at 9 o'clock is 12V power and the white wire at 3 o'clock is heater signal (leave untouched). Grey is ground, and black is signal. Hope that makes sense.
BTW, I decided to cut/splice/tap the O2 sensor itself. It wasn't too bad at all. I couldn't bring myself to cut the main wiring harness.
James
Note that I haven't started my car yet and seen if all is well. My car is still under the knife for the Cattman headers install. Also, what I described above is off the top of my head. I have it written down on a sketch in my FSM, which is at home. When I get home from work, I'll double check and report back here. Hopefully you can hold off your O2 project for tomorrow.
#6
Originally Posted by The Wizard
BTW, I decided to cut/splice/tap the O2 sensor itself. It wasn't too bad at all. I couldn't bring myself to cut the main wiring harness.
#8
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For those installing the 02 simulator provided by Cattman, here's all you need to know. This was done on my 99 CA spec Maxima.
First, orient the O2 sensor so you're looking at the wires directly going into the back of the O2 sensor. Then, arrange the wires so black is at the 12 o'clock position, grey is at the 6 o'clock position, and the white wires are at 3 o'clock and 9 o'clock. The white wire at 9 o'clock is 12V power and the white wire at 3 o'clock is heater signal (leave untouched). Grey is ground, and black is signal.
Black wire coming out of the 02 sensor. Cut it and tape end off. Connect one of the yellow wires (doesn't matter which one) from the O2 simulator to the other end (The end going towards the main harness).
Grey wire coming out of the O2 sensor. Tap it with the black wire from the O2 simulator.
White wire coming out of the O2 sensor (3 o'clock position). This is the heater signal wire. LEAVE IT UNTOUCHED.
White wire coming out of the O2 sensor (9 o'clock position). Tap it with the red wire (12V power) from the O2 simulator.
You're done!
If simulating a second O2 sensor, all you need to hook up is the additional yellow wire from the O2 simulator to the black wire as I described above.
Last but not least, if you don't want to worry about which white wire to tap, you could simply run the red wire from the O2 simulator to any 12V switched power source. A switched power source is one that only has power when the car is running. Also, you could hook up the black wire from the O2 simulator to any ground, you don't have to tap the grey wire on the O2 sensor. I chose to tap all wires at the O2 sensor so all my connections are in one place, I don't have wires running all over the place, and I can easily electrical tape everything once I'm done and make it look OEM. No one will know the wiser.
First, orient the O2 sensor so you're looking at the wires directly going into the back of the O2 sensor. Then, arrange the wires so black is at the 12 o'clock position, grey is at the 6 o'clock position, and the white wires are at 3 o'clock and 9 o'clock. The white wire at 9 o'clock is 12V power and the white wire at 3 o'clock is heater signal (leave untouched). Grey is ground, and black is signal.
Black wire coming out of the 02 sensor. Cut it and tape end off. Connect one of the yellow wires (doesn't matter which one) from the O2 simulator to the other end (The end going towards the main harness).
Grey wire coming out of the O2 sensor. Tap it with the black wire from the O2 simulator.
White wire coming out of the O2 sensor (3 o'clock position). This is the heater signal wire. LEAVE IT UNTOUCHED.
White wire coming out of the O2 sensor (9 o'clock position). Tap it with the red wire (12V power) from the O2 simulator.
You're done!
If simulating a second O2 sensor, all you need to hook up is the additional yellow wire from the O2 simulator to the black wire as I described above.
Last but not least, if you don't want to worry about which white wire to tap, you could simply run the red wire from the O2 simulator to any 12V switched power source. A switched power source is one that only has power when the car is running. Also, you could hook up the black wire from the O2 simulator to any ground, you don't have to tap the grey wire on the O2 sensor. I chose to tap all wires at the O2 sensor so all my connections are in one place, I don't have wires running all over the place, and I can easily electrical tape everything once I'm done and make it look OEM. No one will know the wiser.
#9
i don't understand if you are looking at the end from the sensor or the plug??
also are there not any write ups for 95 range fed spec????
i don't think there is but one rear sensor on fed????
i am gonna sim both o2 and heated circuit, but i need to know what wire is what, and i too want to mount underneath car.
also are there not any write ups for 95 range fed spec????
i don't think there is but one rear sensor on fed????
i am gonna sim both o2 and heated circuit, but i need to know what wire is what, and i too want to mount underneath car.
#11
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Originally Posted by drudoggab
i don't understand if you are looking at the end from the sensor or the plug??
Originally Posted by The Wizard
First, orient the O2 sensor so you're looking at the wires directly behind the O2 sensor.
Originally Posted by drudoggab
also are there not any write ups for 95 range fed spec????
Originally Posted by drudoggab
i don't think there is but one rear sensor on fed????
#12
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Originally Posted by speed racer
Is this only for 99's or does it apply to the 97 -98's?
#16
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Originally Posted by drudoggab
so if i understand you correctly, the 12o'clock thing is with the sensor cut off, and looking at the end of the wires????
#17
I have a 99 max fed spec and only the first two o2 sensorsare visible under the hood..the o2 sensor that is after the cat isn't visible under the hood..the wires run right up into the car from where it is located on the pipeing..how can I instal a dual o2 sensor on he fed 99 maxima?
#20
Originally Posted by adriena
also what colors for the fed spec are the power? ground and signal wires?
#22
i looked under the car for the oxygen sensor because i was told this o2 sensor for the fed spec 99 max goes straight to the ecu. The wire colors are black grey and two whites. the o2 simulator i have is a dual simulator black ground wired red 12v wire and two white wires each for a sensor how can i install this o2 simulator???
#23
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Originally Posted by adriena
i looked under the car for the oxygen sensor because i was told this o2 sensor for the fed spec 99 max goes straight to the ecu. The wire colors are black grey and two whites. the o2 simulator i have is a dual simulator black ground wired red 12v wire and two white wires each for a sensor how can i install this o2 simulator???
#25
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Originally Posted by adriena
what happens if the wrong white wire (3 or 9 o clock) is pluged up to the white wire in my o2 simulator? will anything happen?
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