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I want to point out (just so I don't look like a complete idiot, whether or not I am actually one) that I wasn't thinking that resistance itself would actually change with proper operation of the sensor. Ohmmeters (obviously) have to put out some kind of current in order to determine resistance (a very tiny current), and changes in that voltage induced would make the meter jump because it would believe that more or less current was flowing. The resulting measurement value is meaningless, but if it does jump, the sensor probably works, but the wiring of course could be intermittent with wheel position, etc.
I wasn't familiar with the construction of this particular inductive sensor but a long time ago in a galaxy far away we tested inductive positioning sensors on printers for go/no-go this way in the field. The voltages and currents were so small that ordinary cheap (non-VTVM) analog meters wouldn't move the needle much, if at all, and you really needed to scope it back at the shop.
The current that sensor could produce by hand-spinning a wheel couldn't possibly hurt a DVM (not even my $2.99 harbor Freight special).
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