tps sensor - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
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post #1 of 20 (permalink) Old 08-06-2019, 02:59 PM Thread Starter
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tps sensor

i dont know what i'm doing wrong.i set my ohm meter to ohms 20 k. and connect the negative probe to the black wire on the sensor side of the tps connector block and the positive probe to the blue wire and i get 1.27 i'm supposed to get 4.0 to 6.0.. then i connect the positive lead to the yellow wire and get.75 then when i twist the throttle it goes up to 1.02. its supposed to be .54 to .84 then twist the throttle and its supposed to go to 3.01 to 4.51k ohms. i did this five years ago and i was just within the range now nowhere close. i bought a new tps and these are the readings i get.what am i doing wrong?
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post #2 of 20 (permalink) Old 08-06-2019, 04:05 PM
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Are you sure you are getting a good connection. Here not to long ago I was testing a knock sensor and it kept testing bad. Turned out I wasn't pushing probe into wire enough. Is there any corrosion in the wire that you can see? I know what I'm suggesting is basic for you but sometimes I need to slow down sonetimes.

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post #3 of 20 (permalink) Old 08-06-2019, 04:25 PM
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Completely off subject but Lumberg needs you to come in on Saturday to do those TPS reports....Yeh that would be great...

Sorry it's been that kind of day! Now back the subject at hand....sorry for the detour!
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post #4 of 20 (permalink) Old 08-06-2019, 04:37 PM Thread Starter
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i used female spade connectors and a short wire and my test leads have alligator clips. i tested several times and the numbers were consistent.
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post #5 of 20 (permalink) Old 08-06-2019, 06:24 PM
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Some DVMs have a little battery icon that comes on when the battery is going dead

will throw all the measurements way off

also if you are touching the leads (holding them) while taking a resistance measurement it will also read the resistance of your body in parallel, and give you a lower reading. Try it sometime, squeeze the leads in your fingers, the harder you squeeze, the lower the resistance it reads.
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post #6 of 20 (permalink) Old 08-06-2019, 06:26 PM
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You are rotating the sensor, correct? You need to rotate the sensor on the sloted screw openings to adjust the resistance. What is the reading with sensor fully slide to one side and then the totally opposite way. The readings will change. Stop when you get between the 4 and 6. A very small movement of sensor can make a big change on reading. Loosen the screws only slightly so friction will hold sensor in place when twisting throttle. Post back your results.

2001 Vstar 1100 Classic (sold), Cobra Slash Cut full exhaust, Dropped 1 inch with lowering links, ORK, 4.5 inch handlebar risers, Ultimate passenger seat, Passenger pegs moved forward 4 inches, Handlebar clock, KN air filter, Viking saddlebags, Additional rear lighting
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post #7 of 20 (permalink) Old 08-06-2019, 06:37 PM Thread Starter
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kcw, i'm not touching the leads. les,when i twist the throttle the readings never go over1.31. the idle is a little high about 1150 1.31 is the highest on either wire yellow or blue.i tried all the setting in the ohm scale and 20 k was the closet i could get to 1.0
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post #8 of 20 (permalink) Old 08-06-2019, 06:47 PM
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I didn't see in your reply if you have moved sensor full swing on adjustment slots. If you did, what were the difference in the reading?


2001 Vstar 1100 Classic (sold), Cobra Slash Cut full exhaust, Dropped 1 inch with lowering links, ORK, 4.5 inch handlebar risers, Ultimate passenger seat, Passenger pegs moved forward 4 inches, Handlebar clock, KN air filter, Viking saddlebags, Additional rear lighting
Loose nut "me" behind the bars
2006 Harley Electra Glide Ultra Classic

https://sites.google.com/site/vstar1100kb/home
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post #9 of 20 (permalink) Old 08-06-2019, 06:56 PM
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From wiki:

I had to REMOVE the small round metal washers off the TPS to get the TPS to move a little more for the correct adjustment, follow me on this? I am calling them washers, but there about 1/8" thick and they fit under the screws on the TPS. If you remove them then the TPS will rotate a little more for better ohm setting.

From manual :


2001 Vstar 1100 Classic (sold), Cobra Slash Cut full exhaust, Dropped 1 inch with lowering links, ORK, 4.5 inch handlebar risers, Ultimate passenger seat, Passenger pegs moved forward 4 inches, Handlebar clock, KN air filter, Viking saddlebags, Additional rear lighting
Loose nut "me" behind the bars
2006 Harley Electra Glide Ultra Classic

https://sites.google.com/site/vstar1100kb/home
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post #10 of 20 (permalink) Old 08-06-2019, 06:58 PM Thread Starter
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on the yellow it goes from.96 to 1.33,,, i have the new tps here in front of me. i can rotate the inerds of it and not get it higher than 1.33.

Last edited by nick57; 08-06-2019 at 07:12 PM.
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