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195 Posts
1985 900 T16 Oxygen Sensor Test - APPARENTLY WRONG / W.I.P.
**NOTICE**
This appears to be bad procedure.
Work In Progress
** ** **
Compared to most here, I do not have the experience and know-how to perform what are probably considered the most basic procedures.
I asked a while ago about my oxygen sensor - testing it.
In case anyone else feels as daft as I do, here's the basics. I'll edit this post to include specifics re: numbers and temps.
For now, here's the basics:
Grab your multimeter. You are looking for a powered (with a battery in it) analog meter. This is because the needle will be moving faster than many digital meters respond. More later.
Start your engine, let it idle and come up to normal operating temperature.
Have a care for moving & hot parts. In particular, the oxygen sensor itself is stuck inside the exhaust, right next to your battery.
Stick the negative lead to the negative battery terminal. An alligator clip would be helpful.
Peel back the rubber boot that covers the "reference" line connector from your oxygen sensor. Stick (or clip with an alligator) the positive lead into the connector.
After attaining normal operating temperature, either with your hand on the throttle lever or with the assistance of a lovely assistant, bring the engine to 2000RPM. With the multimeter set to 10V range DC, if your sensor is operating properly, you should see the needle wiggle. Since the multimeter is set to 10v range, you are looking (with this multimeter, YMMV) at the bottom row of numbers in the black section in the center of the display (0 2 4 6 8 10). Since the sensor produces a signal that fluctuates from 0.2V to 0.8V, the needle will wiggle between the 0 and half of the way to the 2.
CORRECTIONS & DETAILS SOLICITED / WILL EDIT.
**NOTICE**
This appears to be bad procedure.
Work In Progress
** ** **
Compared to most here, I do not have the experience and know-how to perform what are probably considered the most basic procedures.
I asked a while ago about my oxygen sensor - testing it.
In case anyone else feels as daft as I do, here's the basics. I'll edit this post to include specifics re: numbers and temps.
For now, here's the basics:
Grab your multimeter. You are looking for a powered (with a battery in it) analog meter. This is because the needle will be moving faster than many digital meters respond. More later.
Start your engine, let it idle and come up to normal operating temperature.
Have a care for moving & hot parts. In particular, the oxygen sensor itself is stuck inside the exhaust, right next to your battery.
Stick the negative lead to the negative battery terminal. An alligator clip would be helpful.

Peel back the rubber boot that covers the "reference" line connector from your oxygen sensor. Stick (or clip with an alligator) the positive lead into the connector.

After attaining normal operating temperature, either with your hand on the throttle lever or with the assistance of a lovely assistant, bring the engine to 2000RPM. With the multimeter set to 10V range DC, if your sensor is operating properly, you should see the needle wiggle. Since the multimeter is set to 10v range, you are looking (with this multimeter, YMMV) at the bottom row of numbers in the black section in the center of the display (0 2 4 6 8 10). Since the sensor produces a signal that fluctuates from 0.2V to 0.8V, the needle will wiggle between the 0 and half of the way to the 2.

CORRECTIONS & DETAILS SOLICITED / WILL EDIT.