anyone ever test the throttle position sensor (TPS)?
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Joined: May 2003
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From: Tucson, AZ
anyone ever test the throttle position sensor (TPS)?
I tested my 3.0 mazda's the Haynes manual (titled Ford Ranger) and got some funky numbers:
When back probing the plug, I got 7mV at idle and then it went up to a higher mV number (can't recall) at full throttle. But, supposed to have .5-1V at idle and ~5V at WOT. The reference voltage was fine, 5V. So was the resistance on the sensor itself.
Sounds bad to me, but has anyone done this theirself?
Thanks
When back probing the plug, I got 7mV at idle and then it went up to a higher mV number (can't recall) at full throttle. But, supposed to have .5-1V at idle and ~5V at WOT. The reference voltage was fine, 5V. So was the resistance on the sensor itself.
Sounds bad to me, but has anyone done this theirself?
Thanks
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anyone ever test the throttle position sensor (TPS)?
Darkeng, it sounds like a bad TPS. If the reference voltage is 5v, you are fine up to the TPS. 7mv at idle is not enough, it should be closer to .75v. Try checking it with the key on, engine off. If you don't get the right range, replace it.
Don't forget the ground wire. Sometimes a bad ground will give a false reading at the signal wire. Try grounding the voltmeter probe at both the TPS ground wire and an engine ground, and see if there's any difference.
If the ground circuit is bad, you can splice an extra ground wire from the TPS to an engine bolt, for a quick and easy fix.
(Straight pins are good for back-probing plug connectors. Just push them into the back of the plug, and touch the meter probes to the pin ends.)
Don't forget the ground wire. Sometimes a bad ground will give a false reading at the signal wire. Try grounding the voltmeter probe at both the TPS ground wire and an engine ground, and see if there's any difference.
If the ground circuit is bad, you can splice an extra ground wire from the TPS to an engine bolt, for a quick and easy fix.
(Straight pins are good for back-probing plug connectors. Just push them into the back of the plug, and touch the meter probes to the pin ends.)
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