Check Abs Wheel Speed Sensor Unit
- Visually 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.
- Disconnect the ABS wheel speed sensor connector.
- Check the ABS wheel speed sensor cable for discontinuity. If defective, replace the ABS wheel speed sensor.
- Connect a 12 V power supply to No. 1 terminal of ABS wheel speed sensor connector, then attach resistance to the No. 2 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
- If the inspection result shows that the output voltage is out of the standard value: Replace the magnetic encoder (hub unit bearing).
- If the inspection result shows that the output voltage is within standard value: Replace the VDC CONTROL MODULE & H/U.