How to test a GM 3-wire crank sensor (hall effect type)

Описание: The tests shown in this video can be used for any 3-wire cam or crank sensor. The P0336 code was caused by the crank sensor connector being left unplugged. So rather than just plug the sensor back in and clear the codes, I decided to take this opportunity to show you how to test the crank sensor circuit on this car. (1996 GM 3100)
There are two crank sensors on these early GM 3100 engines. One is a 2-wire magnetic type sensor that GM calls a 7x crank sensor. (7 pulses per 360 degrees of crank rotation). The second is a 3-wire hall effect type sensor that GM calls a 24x crank sensor (24 pulses per 360 degrees of crank rotation). This is the one we will be focusing on for this video.

Symptoms:
Check engine light (P0336)
Fix:
reconnect sensor connector
Testing methods shown:
how to verify wiring integrity on a pull-up type hall effect using a test light and scan data
how to determine hall effect circuit design (pull-up or pull-down) which is critical in knowing how to perform a proper bypass test
how to perform a hall-effect bypass test
how to check powers and grounds to a hall effect
what does a digital square wave signal look like on a digital voltmeter
a frequency graph compared to the actual signature of the waveform
Tools used:
Snap on Vantage Pro
Incandescent test light
Solus Pro

Related Videos:
Hall effect sensor testing Part 1 - a free ScannerDanner Premium video
   • Hall effect cam/crank sensor operation and...  
Hall effect sensor testing Part 2 - a free ScannerDanner Premium video    • Hall effect cam/crank sensor operation and...  
GM 3800 crank sensor test
   • How to test a crank sensor on a GM 3800 en...  



Playlists:
(Chapter 21) Ignition inputs, cam and crank
   • (Chapter 21) Ignition inputs, cam and cran...  
(Chapter 2) Switch Inputs, digital signals, module communication, hall effect testing
   • (Chapter 2) Switch Inputs, digital signals...  

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com 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 https://www.scannerdanner.com/join-sc... 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!

Disclaimer:
Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.