Abs Wheel Speed Sensor

Check the tip of the ABS wheel speed sensor for foreign particles or damage. If necessary, clean the tip or replace the ABS wheel speed sensor.
Connect a 12 V power supply to No. 2 terminal of sensor connector as shown in the figure, then attach resistance to the No. 1 terminal. Rotate the wheel at about 2.75 km/h (2 MPH), and measure the voltage using an oscilloscope.
Standard value of output voltage:

0.7 - 1.4 V

Fig 1: Checking ABS Wheel Speed Sensor
Courtesy of SUBARU OF AMERICA, INC.

NOTE: Check the ABS wheel speed sensor cable for discontinuity. If necessary, replace with a new part.