Check The Ground Circuit

Disconnect the connector from the ABS control module.
Check for continuity between terminals 1, 4 of the ABS 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 1, 4 Of ABS Control Module Harness Side Connector And Ground
  Courtesy of HYUNDAI MOTOR CO.