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

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(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):


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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.

Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium. There is a 14 day free trial.

On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!