General Motors 2-wire ABS wheel speed sensor test
This is a variable reluctance type wheel speed sensor. Voltage output is an AC sine wave. This type of sensor produces it's own voltage using principles of motion, magnet and a conductor.
Other names for this type of sensor:
- magnetic pulse generator
- pick-up coil
- magnetic pick up coil
- permanent magnet pulse generator
- variable reluctance sensor
The testing methods shown in this video can be applied to all cam and crank sensors that use this same 2 wire design. This is why I have included this video in my Section 21 playlist.
- ABS light on
- intermittent ABS "chatter" or activation during normal braking
- Repaired wire to the left front wheel speed sensor (wires rubbed through on the AC Accumulator)
Testing methods shown:
- how to use bias voltage to identify a wiring problem
- how to locate a short to ground in an ABS WSS harness
- Snap on Vantage MT2400
How to test a digital ABS wheel speed sensor https://youtu.be/Sd-duZ2RCKA
Magneto Resistive ABS Wheel Speed Sensor Test https://youtu.be/UBNo_yg2gFI
How to test a digital type ABS wheel speed sensor (Chrysler,Dodge,Jeep) https://youtu.be/LKJWkAGMOfQ
(Chapter 21) Ignition inputs, cam and crank
ABS Wheel Speed Sensor and System Testing
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.
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