testing o2 sensor video
testing o2 sensor video
http://www.youtube.com/watch?v=1mb4VmDd0ao
jay_russell
19-09-2018, 05:24 PM #1found this and thought it might be handy for all who run turbos etc
http://www.youtube.com/watch?v=1mb4VmDd0ao
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Sparkystav
19-09-2018, 05:46 PM #2Good simple check!
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Switch your meter to a setting that can measure between 0V and 5V (i.e. the 10V/12V setting)
Connect the +ve pin of your meter to the sensor wire on the Lambda sensor that connects back to the ECU. In most 90s Toyotas that have the rectangular Diagnosis port in the engine bay, this sensor feed is available on the pin VF1, so you can just run your meter with +ve on VF1 and -ve on E1. You will also need to bridge TE1 and E1 though, to put the ECU into diagnosis mode.
A happy O2 sensor will fluctuate backwards and forwards around 1V. It should do this about once a second. If the sensor sits on 0V or 5v then it's most likely that something is wrong with the sensor. If it sits between 0V and 1V all the time then your engine is running too rich, and if it sits between 1V and 5V all the time then your engine is running too lean.
I think that's right anyway, I've written that off the top of my head :lol:
That's good, but presumably only works if you have an AFR gauge. There is an easy way to check narrowband (i.e. OEM) lambda sensors with a multimeter:
Switch your meter to a setting that can measure between 0V and 5V (i.e. the 10V/12V setting)
Connect the +ve pin of your meter to the sensor wire on the Lambda sensor that connects back to the ECU. In most 90s Toyotas that have the rectangular Diagnosis port in the engine bay, this sensor feed is available on the pin VF1, so you can just run your meter with +ve on VF1 and -ve on E1. You will also need to bridge TE1 and E1 though, to put the ECU into diagnosis mode.
A happy O2 sensor will fluctuate backwards and forwards around 1V. It should do this about once a second. If the sensor sits on 0V or 5v then it's most likely that something is wrong with the sensor. If it sits between 0V and 1V all the time then your engine is running too rich, and if it sits between 1V and 5V all the time then your engine is running too lean.
I think that's right anyway, I've written that off the top of my head :lol:
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