For week 19 we are going to learn how to scope the Throttle position sensor aka TPS. Most TPSs are three wire sensors. One wire is power (12 volts or 5 volts), one wire is a reference to ground or 0 volts and the last wire is our signal wire. Throttle bodies with a TPS1 and TPS2 just have two sensors built into one housing.
Settings for the snapon scope will be 5, 10 or 20 volt scale depending on the vehicle and a sweep time of 200ms. If you are road testing for a dropout you may want to set this to 500ms so you have more buffer space. On the picoscope you can set the sweep to 1 second/div and you should be just fine.
0:00 intro
0:30 how a tps works
13:10 testing begins
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