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How to test a digital ABS wheel speed sensor

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Added by Admin in Automotive Parts


This case study is a good example of how my engine performance testing methods can easily be applied to other areas of the car, giving you confidence during diagnostics! This Chrysler 300 comes equipped with ‘digital’ ABS wheel speed sensors, which differ from conventional variable reluctance sensors, and are becoming more and more common on newer vehicles. Be sure to check the related videos below for more ABS sensor testing info.

Engine Performance Diagnostics chapter 2

- ABS/traction control lights on
- ABS codes 12 and 13 stored

- replace the right front ABS wheel speed sensor

Tests shown
- using graphed scan data to check for wheel speed sensor function
- using the Snap-On Troubleshooter to learn more about component testing
- how to scope test a digital ABS wheel speed sensor
- how to check if a sensor circuit is pull-up or pull-down by disconnecting the sensor
- how to perform a bypass test (pull-up or pull-down) on a sensor signal circuit
- understanding bypass test variables, including shorted sensors and setting trouble codes
- how to perform a visual inspection on a wheel speed sensor and tone wheel

Tools used
- Autel MS905 MaxiSys Mini Diagnostic System with Connector Kit - USA Version
- PicoScope 4425 4 Channel Standard Diagnostic Kit
- incandescent test light

- ABS Wheel Speed Sensor and System Testing

Related videos
- How to test a digital ABS wheel speed sensor - 08 Chrysler,Dodge,Jeep
- Magneto Resistive ABS Wheel Speed Sensor Test - 2006 GM
- ABS activates on every stop - damaged tone ring
- How to test an ABS Wheel Speed Sensor (VRS type)

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-scannerdanner-premium.html 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!

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.

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