Front Wheel Speed Sensor: Inspection

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 100Ω resistor must be used. See Fig 1.

Fig 1: Measuring Wheel Speed Sensor Output Voltage
Courtesy of KIA MOTORS AMERICA, INC.
Compare the change of the output voltage of the wheel speed sensor to the normal: change of the output voltage. See Fig 2.

Fig 2: Wheel Speed Sensor Output Voltage Graph
Courtesy of KIA MOTORS AMERICA, INC.