0xygen sensors are just a type of resistor, i know which 2 wires carry the power in/from the sensor but do not know which is feed and which is output, does it matter which one i break into to see the voltage change, i.e. does it have to be the output wire, or does the voltage drop across the entire circuit??
tbh I thought they generate a current rather than resist one
They generate a voltage up to 1.5 volts I think. with 0.7 being the perfect mixture. They also contain heating coils which should be supplied with 12v.
oh yes, of course you are correct, they generate it!! Yes i have identified the heater wires. So if it generates the the voltage, it won't matter which wire i break into???
it can get confusing so have a look here.
http://lambdasensor.com/main/mcolours.htm
woolly
where does it tell you how to do link things please,
quote:
Originally posted by MK9R
oh yes, of course you are correct, they generate it!! Yes i have identified the heater wires. So if it generates the the voltage, it won't matter which wire i break into???
quote:
Originally posted by Mr Whippy
quote:
Originally posted by MK9R
oh yes, of course you are correct, they generate it!! Yes i have identified the heater wires. So if it generates the the voltage, it won't matter which wire i break into???
I suspect it would matter as the current flow should still be in one direction rather like a thermocouple, but at this point I’m getting a little out my depth
Maybe you could hold it over a gas burner flame and see what the reading is and outputs polarity?
not got a wiring diagram for the car? You could follow the wire back from the tacho
If you're measuring an induced or generated voltage you might need to tap into both- it depends on the circuit at the other end of the cable. They could have it relative to a virtual earth not true earth....
quote:
Originally posted by Mr Whippy
not got a wiring diagram for the car? You could follow the wire back from the tacho