Advanced Braking

Wheel Speed Sensor

It is important to note two things

1) If there is no battery voltage to this sensor, then the sensor will not work at all.

2) The signal return circuit is where the sensor can be tested. The normal voltage level, as the wheel is rotated, switches between approximately 0.8 volts and 1.6 volts. If using a scope for testing, this will appear as a square wave signal.