Component Inspection

Wheel speed sensor circuit check
1. Lift the vehicle.
2. Ignition "ON" & Engine "OFF".
3. Turn the wheel by hand.
4. Measure waveform between signal terminal of the wheel speed sensor harness connector and chassis ground with oscilloscope.
  Specification : High : 1.18~1.68V, Low : 0.59~0.84V
  
  Fig 1: Measuring Waveform Between Signal Terminal Of Wheel Speed Sensor Harness Connector & Chassis Ground
  Courtesy of KIA MOTORS AMERICA, INC.
5. Is the measured waveform within specifications?
  YES
  - Fault is intermittent caused by poor connection in wheel speed sensor harness (FL).
    Go to VERIFICATION OF VEHICLE REPAIR procedure.
  NO
  - Substitute with a known-good Wheel speed sensor and check for proper operation.
    If problem is corrected, replace Wheel speed sensor and then go to VERIFICATION OF VEHICLE REPAIR procedure.