Wheel Sensor And Sensor Rotor

WARNING: This page is about a different car, the 2015 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Wheel sensor of front wheel is installed on steering knuckle.

Fig 1: Identifying Wheel Sensor
Courtesy of NISSAN NORTH AMERICA, INC.
Sensor rotor of front wheel is integrated into the wheel hub assembly.
Wheel sensor of rear wheel is installed on rear final drive.
Sensor rotor of rear wheel is installed on drive shaft (rear final drive side).
Never measure resistance and voltage value using a tester because sensor is an active sensor.

Power supply is supplied to detection portion so that magnetic field line is read. Magnetic field that is detected is converted to current signal.

Fig 2: Wheel Sensor And Sensor Rotor Operation Diagram
Courtesy of NISSAN NORTH AMERICA, INC.
When sensor rotor rotates, magnetic field changes. Magnetic field change is converted to current signals (rectangular wave) and is transmitted to ABS actuator and electric unit (control unit). Change of magnetic field is proportional to wheel speed.