O2 Sensor Wiring ?
12 April 2007, 10:43 PM
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O2 Sensor Wiring ?
Anyone no what the 4 wires are for on MY06 , Im fitting a gauge & need to find the “signal” wire , im pretty sure the 2 black are the heaters but not 100% ………Any help on this 1 
12 April 2007, 11:56 PM
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3 wire sensors use the exhaust as earth.
four wires have their own. (more reliable)
just get a multimeter and probe to find the one that oscillates between 0.2-0.8 volts.
Ideally though if you are relying on the gauge for your fuelling then it needs to be a dedicated wideband sensor and gauge setup.
for eg...
WBo2.com WIDEBAND AFR/LAMBDA (Tech Edge)
or
MoTeC Advanced Engine Management & Data Acquisition Systems - PLM
Andy
Andy
four wires have their own. (more reliable)
just get a multimeter and probe to find the one that oscillates between 0.2-0.8 volts.
Ideally though if you are relying on the gauge for your fuelling then it needs to be a dedicated wideband sensor and gauge setup.
for eg...
WBo2.com WIDEBAND AFR/LAMBDA (Tech Edge)
or
MoTeC Advanced Engine Management & Data Acquisition Systems - PLM
Andy
Andy
Got a multimeter & tested the 4 wires , now the only 2 that i get a signal from are the 2 black ones 
...Now im lost 
13 April 2007, 07:44 PM
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One assumes you actually had it running at the time ??
or the engine was still cold thus a constant 0.8 volts (rich)
Andy
or the engine was still cold thus a constant 0.8 volts (rich)
Andy
Last edited by Fuzz; 13 April 2007 at 07:53 PM.
13 April 2007, 09:18 PM
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Jimbo - dont confuse me anymore lol
Andy - Yes mate the engine is running
. right now im getting 2.84 from the blue wire & 2.48 on the white < the 2 black heaters i think , were a lot higher >
So im still lost lol
Andy - Yes mate the engine is running
. right now im getting 2.84 from the blue wire & 2.48 on the white < the 2 black heaters i think , were a lot higher >So im still lost lol
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14 April 2007, 07:40 AM
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Both black wires are for the heater, white wire is earth, blue wire is signal,
To test bare a bit of the blue wire and connect your AFR gauge signal wire fire up the engine, with a cold engine your gauge will show a constant green meaning running rich, when warm LEDs will cycle up and down until your at full throttle when again should show green.
To test bare a bit of the blue wire and connect your AFR gauge signal wire fire up the engine, with a cold engine your gauge will show a constant green meaning running rich, when warm LEDs will cycle up and down until your at full throttle when again should show green.
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