I'm working on a 92' 4x4 pickup with 22re
I have replaced the O2 sensor and was checking the
circuit wiring out and with the sensor unplugged I found that I have continuity between E1 and Ox1. Is this normal?
Reply 1 : O2 sensor circuit question
I don't know, but I do know that if you wire the O2 sensor backwards, you're get an error code.
Reply 2 : O2 sensor circuit question
Continuity doesnt count. You're looking for millivolt output when the engine runs.
-SP
Reply 3 : O2 sensor circuit question
define "continuity" If you're using beep mode, keep in mind it'll beep with several ohms resistance (like the heater coil or O2s element *wink*) which is why beep mode sucks for actually checking continuity. use ohms.
More directly, yes they are connected but with high resistance because the O2s sensing element is between them. speedy is right though, ohms isn't relevant, check voltage with the engine running (running for a minute or 2) should alternate from below .2v to above .8v (200mV, 800mV) once a second or so. not the easiest to see on a cheap digital meter but don't use an analog because it's too low impedance.
Reply 4 : O2 sensor circuit question
Thanks for the info guys I got it repaired some previous owner
or shade tree mechanic armed with a butt splice and no idea what
to do with it crimped the shield and center conductor together causing
the pulse singnal to go to ground instead of the ECU. and there should be
no continuity between E1 and ox1 with sensor unplugged of course it could
be several thousand ohms but on a 12v dc circuit that would be the same
as none
Reply 5 : O2 sensor circuit question
on a sensitive voltage sensing circuit even a few thousand ohms to ground is a connection that will throw it off.
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