Nice quote from the SM manual but it dont work.
35 years in electronics and I can tell you there aint no 5k single turn potentiometer made that you are going to read that low end resitiance on. It will just apear as a short.
I tried and tried and tried to make the instructions work (despite my electronics background) but it just doesnt. I'd love to say go by the manual always but on this one I am 99.9% sure its a typo that is repeated over and over. You just cant do what they call for. I even tried diffrent TPS's and diffrent cars. By the time the pot reads under 1 ohm you cant set the high end requirement.
One thing for sure that is rock solid advice, before you move that TPS - Mark it! That way if I am right and the procedure to set it is bogus you can at least put it back where it started from if it is not the problem.