If you checked its condition visually, that is probably adequate.

You cannot get an accurate indication using an ohmmeter. The way to test it out of circuit is to apply a voltage across the outside terminals, and monitor the voltage on the wiper pin as the plate is moved. This is best done with a high-impedance analog meter and bench power supply, not generally in most garages.

Or, monitor the voltage in-circuit with the engine running. The voltage should be steady at a steady rpm, and about 0.7V at low idle.

Steve

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'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7