ABS Wheel Speed Sensors

On the vehicle that you have been assigned does it use analogue or digital wheel sensors?
It has got the analogue wheel sensor

How did you conclude that the wheel sensors were analogue or digital?
It is because there were only two wires plugged at the connection.

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Measure the air gap for each wheel sensor.
State the air gap and visual condition of each wheel sensor

Front Right
0.406mm

Front Left
0.406mm

Rear Right
0.406mm

Rear Left
0.406mm

This above results of the wheel speed sensors are all accurate and same compared with all four wheel speed sensors gap. To measure the gaps between the wheel speed sensor and the rotor I had to use the copper feeler guage so I don't damage the wheel speed sensor than the normal feeler guage because it is the magnetic type wheel speed sensor.


Using an oscilloscope connect it to a wheel sensor and record the pattern shown, If the sensor is a Analogue sensor then just connect then probe and spin the wheel. If the sensor is digital you will need to have the iginition on before you turn the wheels.

Is this pattern an analogue or digital pattern?

This is the analogue pattern.

Using the frequency scale on a multi-meter. Turn the wheel at proximately the same speed as in the above test. Note the frequency and compare it to the graph you drew above.

Frequency

F = 1/t

= 1/10ms

= 0.1ms

Observations
There was no missing teeth and its not noisy because the waveform was complete and not broken.