What I am showing in this video is how to quickly test a throttle position sensor and wiring. No need to follow some engineer written flowchart that tells you to ohm the circuit for opens and shorts. (too time consuming)
All you need is a decent scan tool and a paper clip.

Engine Performance Diagnostics chapter 7 pages 9-10 and chapter 10

symptoms 50

  • check engine light (trouble codes P0121 and P0122)
  • hesitation
  • stalling

fix 50

  • replace faulty TPS

test shown enh 50

  • how to test the wiring to a throttle position sensor or any other potentiometer

Tools used

  • graphing multimeter (Vantage MT 2400)
  • digital multimeter
  • scan tool

end faq

Playlist

(Chapters 9, 10 and 11) The 5v Reference and Signal Circuit Quick Tests

Related videos:

How to test throttle position sensor wiring with a resistor (any car):

How to test TPS wiring with a scan tool (any car):

Toyota Power Steering Pressure Sensor Test (P0550):

end faq


For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

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Comments   

0 #2 ScannerDanner 2018-02-13 20:25
Quoting 266sam@gmail .com:
i didnt see you use the 5k ohm risiter kind of throught me off an can i do the same test with the resister on a 94 chey trk on the tps

Because I've always used a jumper wire until I put something in print. In all honesty, a jumper wire is fine, even if you short the reference circuit out. The 5v ref in a PCM is highly protected. I just don't recommend it on principle. What about that one car than does NOT recover from a shorted 5v ref. ? One I am unaware of.
0 #1 266sam@gmail .com 2018-02-04 20:22
i didnt see you use the 5k ohm risiter kind of throught me off an can i do the same test with the resister on a 94 chey trk on the tps