I replaced the throttle position sensor on my bike, with about 66K miles. I’ve had the bike over three years, and noticed the idle was always a bit rough despite new plugs and repeated throttle body synchronizations.
On both the new and old TPS, resistance between the outer prongs read infinity. But between one outer and the center prong it read 18 ohms (not 18K since my meter was on the 0-200 range scale), and center to the other outer prong was infinity. The old TPS also only read on the same prongs, but started at infinity unless I rotated the TPS input and then the values would jump all over inconsistently.
Glad to hear that you fixed the problem. Good catch.
Apologies if this is too late to help you, but for others then: For many digital multimeters (and the OBD), readings for the TPS may not tell you there is a problem, especially if the problem is not too extreme. However, they do
make DMMs with a bar-graph in the digital display. It is a line that travels across the display, according to the value being measured. Such a DMM will still show the digital readings, of course, but the bar graph will tell you if the measurement (the throttle response, here) is being jumpy, intermittent, or smooth (as it should be for a TPS). A purely digital readout will not look bad, there, unless the jumps in the readout are huge or blatant. Old-timers like me may compare the bar graph readout to a swinging-needle gauge, but the bar graph is much more responsive (faster) than any moving needle could be.
As one example, you may discover that a voltage line feeding some balky gadget is actually intermittent, shutting off the power for split seconds at a time, when lesser DMMs would not see the failure. The same applies to the other readings with the DMM as well.
You might not decide to retire your present DMM to simpler duties in favor of a DMM with a bar graph in the display right now. Still, I would recommend that any DMM you buy in the future should include the bar graph readout in the digital display screen. Lately even the less expensive DMMs can have the bar graph readout.
You have to log in over there, but some bar graph DMM pix:
My US$.02 worth. All IMHO, of course.