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No.. i mean for you to ohm the sensor from it's terminal that the gn/rd wire hooks to ground.

That sesnor is 2 sensors in one, with each terminal using ground as a common..so, each terminal to ground should read the same value.
The gn/rd wire from the sensor will be the temp input value feed to the N3 module . The other side of that sensor is temp input value to ign module.
[ ICU]

Here is a trick
Take the green wire that goes to N3 and disconnect it from the 02 sensor at the 02 plug ..[ under rug, where it goes from Blk to Gn]
Now, you can give N3 an input from approx zero to 1 volt by holding that wire in one hand and putting you thumb of the other hand on the bat + terminal ..on/off with the thumb will mimic 02 sensor input to N3.
Try it.