Testing TPS on 90'Q45

[mattd1979]

What OHMS setting do I set my VOM to when checking the resistance of the TPS. I had it on the lowest setting and would not get anything but when I set moved it up two positions and started opening the throttle, I didn't get any readings until I had it open half way and once it was fully open, it went back to 0. I also decided to drive my car with the TPS unplugged to see if I noticed a change but did not.

[elwesso]

Look at the FSM!!!!!! at idle it is supposed to be at .7k ohms, or 700 OHMS! So you'll want to put it on the 20k scale!!!!!!!!!!!!!!

[mattd1979]

Ok. I measured the volts at the connector and A is .010 volts, C is .013v and B is 11.84v. As far as the color of the wires. I had to cut the boot off that covered them and did not find a white wire. I found a green, black with white tracer, and a red. When I measured the resistance of the TPS, I didn't get anything until half way and then at the halfway point it went from 0.0 to 0.00 which seems to be a short. I set the meter to 20k ohms as mentioned.

[elwesso]

You did the test wrong. You tested the CLOSED/OPEN THROTTLE SWITCH not the THROTTLE POSITION SENSOR.

Notice the roundish connector coming out of the TPS.. please look at all FSM diagrams before cutting things!

[elwesso]

See attached image!!