Come on, someone go look at your oxygen sensor and tell me which wires go where! I know everyone has one!!!

PLEASE

Damn dude, that sucks! And noone even replys to you... I have the same prob with my 2G except my buddy did the cutting and I did the kicking @$$! 2G's wiring is all wierd colors too, and I still haven't gotten it right... Wish one of those DSM nerds would pop out a wiring schematic or something.

L8

Kaane said:

On the sensor side I have 2 white wires 1 black 1 grey

On the Engine side I have 2 Black 1 Red 1 White.

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From DSM Backup manual for 91 DOHC turbo (92 should be same):
Engine side: red (pin 3) and black (4) are the heaters which go to the sensor side whites (either way - they measure about 12 ohms). Engine side black (2) is signal ground and white (1) is signal.

Every after market O2 is different but I would guess the black should go to sensor black and white to sensor grey. If it doesn't work reverse these two.

The engine side round connector has pin 1 in upper left, 2 upper right, 3 lower left, 4 lower right. Hope that helps.

HighPSIRacing said:

2G's wiring is all wierd colors too, and I still haven't gotten it right...

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Engine side: For the 2g, I can tell you what the 97-99 has and you can see if your 95 is same (probably is). Red and yellow (red and yellow/black for rear O2) are the heaters. White is signal and black is signal rtn (ground). The connectors are different and have different pins.

Sensor side: Since all after market O2'2 have different color wires you'll have to figure it out. If you have 2 same color wires, they are usually the heaters (go either way - they measure about 12 ohms so you can find them if they are not the same color). The other 2 are then the signal wires. If you have one black it's usually signal ground. If that doesn't work switch these two non heater wires.

Could you be more specific on your wire colros for the 2g rear o2 sensor. I'm trying to hook up an o2 simulator and i'm given yellow, red, and black wires. I'm supposed to hook up the yellow to a signal wire, red to 12 volt power wire, and black to ground. Then i leave the heater signal wire alone. I have a wiring diagram infront on me for a 2g turbo but it's not making any sense. Obviously black is going to black on both sides because they are both ground. However what wire is the 12 volt power and which is the heater signal and the regular singal? One heater signal (yellow/black) goes to the engine control module just as the white wire does. So i'm assuming the yellow/black wire is the heater signal and the white wire is just the signal wire. Then the red wire looks like it's connects to the cam position sensor.

Correct me i'm wrong because i want to know exactly how to hook this up before i do it.

O2 Simulator Side > Connector side
Yellow signal wire white signal wire
Red power wire red heater wire
black ground wire black signal ground

yellow/black wire is left alone as it is the heater signal

Kaane said:

I had a cut wire on the harness to the oxygen sensor on my 1g. I took
the connector apart and I was going to get it all fixed, but I was
little too hasty and forgot to write down which wire colors go where.

On the sensor side I have 2 white wires 1 black 1 grey

On the Engine side I have 2 Black 1 Red 1 White.

So which wires go to where?

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Here ya go. to the botttom of the page.

http://www.dsmtuners.com/forums/showthread.php?t=171244


Tom

Damn thats too bad it's for a 1g. There rear o2 sensors on 1g's and 2g's are wired up completely different. I tried to look at both wiring diagrams to make sense on a2g but it's hard to tell. Thanks anyways

my95tsi said:

However what wire is the 12 volt power and which is the heater signal and the regular singal? One heater signal (yellow/black) goes to the engine control module just as the white wire does. So i'm assuming the yellow/black wire is the heater signal and the white wire is just the signal wire. Then the red wire looks like it's connects to the cam position sensor.

Correct me i'm wrong because i want to know exactly how to hook this up before i do it.

O2 Simulator Side > Connector side
Yellow signal wire white signal wire
Red power wire red heater wire
black ground wire black signal ground

yellow/black wire is left alone as it is the heater signal

Click to expand...

You've essentially got it correct. The 12V power is the red wire which supplies power to many things (including the cam position sensor and O2's heater). It comes from the MFI relay. The yellow/black is the heater return (or signal if you like) wire which is just switched to ground inside the ECU thus turning on the O2's heater. The white is the regular O2 monitoring signal sent to the ECU. Black is the regular O2 monitoring signal ground and is grounded inside the ECU. So your chart looks correct.

Thank you very much it was hard to find the correct answer because i only found info on 1g's. I guess i'm nt as bad at figuring these thing out as i thought.

Ok i installed it today and it doesn't work. The led on the unit lights up so i know i'm getting power howver it's not doing it's job. I still have a cel. I used my pocketlogger to remove the cell but it turned back on in about 10 minutes. I know i have the red and black wires on the 02 simulator hooked up correctly. However i don't think i have the o2 simulator yellow wire hooked up correctly. I originally thought i should hook it up to the white wire which you said is the regular o2 monitoring signal sent to the ecu, which still sounds correct however it's not working. So should i hook it up to the yellow black wire instead of the white. Here is what the instructions say.

6. Connect the o2 simulator black wire to the o2 sensor ground.
7. Connect the o2 simulator red wire to the o2 sensor +12V.
8. Cut the sensors signal wire completely.
9. Connect the simulator yellow wire to the other half of the singal wire that leads to the ecu.

Leave the heater singal wire untouched.

Does this make any sense it sounds like i did everything right what could be wrong?

Don't know what's wrong but it sounds like you have it connected properly (although I admit I've never had one). Are you sure it's designed for a 2g DSM? Did you cut the O2 sensor signal wire? Is this where you got it? http://www.o2sensorsimulator.com/

Also perhaps this guy can help - sounds like he had similar problem: http://www.dsmtuners.com/forums/showthread.php?t=168173&highlight=simulator

Go to http://www.o2sensorsimulator.com/ and click installation. I think i figured out the problem though. Apparently the o2 sensor's heater circuit needs to be functioning for the simulator to work. And i pulled a cel po141 which is a heater circuit malfunction bank 1 sensor 2.

luv2rallye said:

Don't know what's wrong but it sounds like you have it connected properly (although I admit I've never had one). Are you sure it's designed for a 2g DSM? Perhaps you could PM me with a picture of it and any instructions it came with. How is it supposed to work - does it have a knob you turn until you get the proper voltage on the O2 signal wire or what? Also perhaps this guy can help - sounds like he had similar problem: http://www.dsmtuners.com/forums/showthread.php?t=168173&highlight=simulator

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