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Home >> Subaru >> 2014 >> Impreza WRX STI Limited >> Repair and Diagnosis >> Brakes >> Traction Control >> Vehicle Dynamics Control System >> Front ABS Wheel Speed Sensor >> Inspection >> Abs Wheel Speed Sensor

Abs Wheel Speed Sensor

  1. 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.
  2. Check the ABS wheel speed sensor cable for discontinuity. If defective, replace the ABS wheel speed sensor.
  3. 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: Measuring Voltage Of ABS Wheel Speed Sensor Connector No. 2 And Ground
    G08542335Courtesy of SUBARU
  4. Replace the ABS wheel speed sensor if the inspection result is not within the standard value.
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