Repair Procedures: Removal

Remove the rear wheel and tire.
Tightening torque:

88.3 ~ 107.9 N.m (9.0 ~ 11.0 kgf.m, 65.1 ~ 79.6 lb-ft)
Remove the rear wheel speed sensor mounting bolt (A).
Tightening torque:

6.9 ~ 10.8 N.m (0.7 ~ 1.1 kgf.m, 5.1 ~ 8.0 lb-ft)

Fig 1: Identifying Rear Wheel Speed Sensor Mounting Bolt
Courtesy of HYUNDAI MOTOR CO.
Remove the rear wheel speed sensor cable mounting bolt.
Remove the rear seat back.
(Refer to the "SEAT ")
Disconnect the rear wheel speed sensor connector (A), and than remove the rear wheel speed sensor.

Fig 2: Identifying Rear Wheel Speed Sensor Connector
Courtesy of HYUNDAI MOTOR CO.
Installation is the reverse of removal.
CAUTION: Install the rear sensor after lubricating the O-ring of sensor with the assembly fluid (RAREMAX AF-1)
When inserting the sensor, take care the O-ring not to be damaged.

Inspection
1. Measure the output voltage between the terminal of the wheel speed sensor and the body ground.
  CAUTION: In order to protect the wheel speed sensor, when measuring output voltage, a 100 Ω resister must be used as shown.
  
  Fig 3: Measuring Output Voltage
  Courtesy of HYUNDAI MOTOR CO.
2. Compare the change of the output voltage of the wheel speed sensor to the normal change of the output voltage as shown below.
  
  Fig 4: Output Voltage Graph
  Courtesy of HYUNDAI MOTOR CO.
  
  V_low: 0.59V ~ 0.84V
  
  V_high: 1.18V ~ 1.68V
  
  Frequency range: 1 ~ 2, 500Hz