Check The Ground Circuit

Disconnect the connector from the ESC control module.
Check for continuity between terminals 45, 46 of the ESC control module harness side connector and ground point.
Is there continuity?

YES:
- Check the wheel speed sensor circuit.
NO:
- Repair an open in the wire and ground point.
  
  Fig 1: Checking Continuity Between Terminals 45, 46 Of ESC Control Module Harness Side Connector And Ground Point
  Courtesy of HYUNDAI MOTOR CO.