Crank shaft position sensor, how to test for power?

2005 MAZDA 6
170 MILES • 2.3L • 4 CYL • 2WD • AUTOMATIC
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ERIC1BUILD
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  • 3 POSTS
Either I am not getting power to the sensor, or I need help testing the power to it.
It reads .345 volts.
Jun 9, 2023 at 12:38 PM
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STEVE W.
  • ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
That sensor doesn't get power, it is just a coil that generates a sine wave from the teeth on the reluctor passing the coil's tip. If you have an oscilloscope, you could watch the signal, but a common meter won't tell you much because it doesn't sample fast enough.
Jun 9, 2023 at 1:35 PM
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ERIC1BUILD
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  • 3 POSTS
Well new tool time.
Jun 9, 2023 at 3:29 PM
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ERIC1BUILD
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Many thanks.
Jun 9, 2023 at 3:29 PM
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STEVE W.
  • ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
If you are looking at tools, take a look at the U-Scope from AES Wave. It's a nice compact single channel scope and is very handy to have. The basic kit is a great starter item.
Mine gets used a lot and I've added a PICO as well. However, if you can find an older Snap-on tool (like the Vantage, modis, solus and others) that has a scope those work pretty well and sometimes for less than the PICO.
Jun 10, 2023 at 1:40 PM
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