Abs Wheel Speed Sensor

1. Check the pole piece of the ABS wheel speed sensor for foreign particles or damage. If necessary, clean the pole piece or replace the ABS wheel speed sensor.
2. Charge a 12 V power supply to the No. 2 terminal of sensor connector as shown in Fig 1 , and then install the resistance to No. 1 terminal. Rotate the wheel about 2.75 km/h (2 MPH) or equivalent, measure the voltage using oscilloscope.

Standard value of output voltage: 

0.7-1.4 V 

Fig 1: Measuring ABS Sensor Output Voltage

Courtesy of SUBARU OF AMERICA, INC.