Thread: how to ohm the TPS ?
07-22-2010, 03:42 PM #1
- Join Date
- Jun 2010
how to ohm the TPS ?
were am i going to ohm the tps at my msx140 ? is it inside the sensor or on the wires ? beacuse it says 3Kohm in the service manusl, and on the wires it messures 600 ohm at max ?
07-22-2010, 08:58 PM #2
- Join Date
- Jul 2007
- near Toronto, Canada
There is no point to measuring the ohms on a TPS.
The old design TPS were a potentiometer type, and the service manual does provide ohm specifications.
The newer TPS use a Hall Effect electronic sensor inside, and cannot be tested with an ohm-meter.
More importantly, a bad TPS can test good with an ohm-meter, yet still be bad. The reason is that engine vibration and heat can greatly affect the TPS.
The only reliable test for a TPS is to install a new or known good TPS.
Having a spare TPS on hand is also a good idea, since there is no work around when a TPS does go bad.
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