DIY O2 Sim at ECU
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From: Sumrall, Mississippi, US
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DIY O2 Sim at ECU
I connected most of the wires for my O2 simulator by the ECU. Someone e-mailed me, so I decided to do a DIY for the people that want to connect it to their ECU. One wire is running through the engine bay, but I think that is better than having five run through there. Tell me what you think.
What you will need: 5 wire taps(1 will be left over), 16-18 guage wire (about 7-8 ft. just to be safe), electrical tape, wire crimpers/cutters, and the O2 Simulator.
O2 Sim wire colors: Red - power
Black - ground
White - rpm in
Blue or Blue/White - tps in
Green or Green/White - O2 Sim out
Step 1. Disconnect the negative terminal on the battery. Open your glovebox and pop out the 2 pieces that keep it from swinging forward. Let the glovebox swing down.
Step 2. The ECU is the metal box with wires coming out of it right behind the glovebox. The wires are divided into three plugs. The top plug is A, middle plug B, and bottom plug C.
Step 3. Get the O2 Simulator ready for what ever kind of wire taps you have.
Step 4. Here is a list of where to find the wires to splice (not cut) into.
O2 Simulator ECU
Red plug C yellow/black near bottom left 2 black wires directly above it (test if unsure)
Black plug C Black the top black wire above the power wire (test if unsure)
White plug A Blue only blue wire on right side of plug
Blue or Blue/White plug C Red/Black next to green wire
Step 5. Extend the Green or Green/White wire from the O2 Simulator and run it through the rubber grommet below the glovebox and behind the carpet. Tape the wire up to existing wire loom so it looks stock. Run it to the second O2 sensor (the one that would normally read after the catalytic converter. Cut the black wire on the second O2 sensor, and cap the end going back to the sensor (you won't need this end). Connect the O2 Simulator wire to the Black sensor wire that runs away from your sensor and toward the ECU. The ECU is now tricked into thinking that you have a catalytic converter. Remember not to use the end going back to the sensor.
Step 6. Connect battery and crank car. Let it sit and idle for about ten minutes. Your ECU is having to re-learn your fuel maps due to more air flow and now a correct signal from the sensor. Put everything back together and you are good to go.
Remember that I am not responsible if you mess up or screw up. just kidding. I hope that made sense. Let me know how it turns out or if you have any more questions.
What you will need: 5 wire taps(1 will be left over), 16-18 guage wire (about 7-8 ft. just to be safe), electrical tape, wire crimpers/cutters, and the O2 Simulator.
O2 Sim wire colors: Red - power
Black - ground
White - rpm in
Blue or Blue/White - tps in
Green or Green/White - O2 Sim out
Step 1. Disconnect the negative terminal on the battery. Open your glovebox and pop out the 2 pieces that keep it from swinging forward. Let the glovebox swing down.
Step 2. The ECU is the metal box with wires coming out of it right behind the glovebox. The wires are divided into three plugs. The top plug is A, middle plug B, and bottom plug C.
Step 3. Get the O2 Simulator ready for what ever kind of wire taps you have.
Step 4. Here is a list of where to find the wires to splice (not cut) into.
O2 Simulator ECU
Red plug C yellow/black near bottom left 2 black wires directly above it (test if unsure)
Black plug C Black the top black wire above the power wire (test if unsure)
White plug A Blue only blue wire on right side of plug
Blue or Blue/White plug C Red/Black next to green wire
Step 5. Extend the Green or Green/White wire from the O2 Simulator and run it through the rubber grommet below the glovebox and behind the carpet. Tape the wire up to existing wire loom so it looks stock. Run it to the second O2 sensor (the one that would normally read after the catalytic converter. Cut the black wire on the second O2 sensor, and cap the end going back to the sensor (you won't need this end). Connect the O2 Simulator wire to the Black sensor wire that runs away from your sensor and toward the ECU. The ECU is now tricked into thinking that you have a catalytic converter. Remember not to use the end going back to the sensor.
Step 6. Connect battery and crank car. Let it sit and idle for about ten minutes. Your ECU is having to re-learn your fuel maps due to more air flow and now a correct signal from the sensor. Put everything back together and you are good to go.
Remember that I am not responsible if you mess up or screw up. just kidding. I hope that made sense. Let me know how it turns out or if you have any more questions.
Thread Starter
Registered!!
Joined: Nov 2002
Posts: 75
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From: Sumrall, Mississippi, US
Rep Power: 0 CRAP!!![IMG]i/expressions/face-icon-small-mad.gif[/IMG][IMG]i/expressions/face-icon-small-mad.gif[/IMG] It doesn't look the way it was supposed to. Sorry, I have not gotten much sleep lately. Maybe you get the idea. If you really are interested in this then you can e-mail me and I will see how that turns out.
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From: 562/909, California, US
Rep Power: 0 what is that for????? [IMG]i/expressions/face-icon-small-confused.gif[/IMG][IMG]i/expressions/face-icon-small-confused.gif[/IMG][IMG]i/expressions/face-icon-small-confused.gif[/IMG][IMG]i/expressions/face-icon-small-confused.gif[/IMG][IMG]i/expressions/face-icon-small-confused.gif[/IMG][IMG]i/expressions/face-icon-small-confused.gif[/IMG]
i do not know anything about the o2 or ecu
thanks
i do not know anything about the o2 or ecu
thanks
Thread Starter
Registered!!
Joined: Nov 2002
Posts: 75
Likes: 0
From: Sumrall, Mississippi, US
Rep Power: 0 All the O2 Simulator does is tell your ECU that you have a catalytic converter when you don't, or when you have a high flow cat. So far as some place to get the Sim; I honestly don't know. Try a google search for ECG Electronics.
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