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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 :notworthy
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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 |
Originally Posted by Fuzz
(Post 6832297)
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. Andy |
Originally Posted by Fuzz
(Post 6832297)
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. Andy |
lnstead of connecting at the sensor you could tap in to the signal wire at the ECU.
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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 |
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 |
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. |
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