Wheel Sensor and Sensor Rotor

NOTE:

• Front sensor rotor is integrated in wheel hub assembly.
• Rear sensor rotor is installed on the rear axle shaft.
• Never measure resistance and voltage value using a tester because sensor is active sensor.

FUNCTIONS WITHIN THE SYSTEM 

Wheel sensor and sensor rotor detect each wheel speed. Wheel sensor inputs wheel speed signal to ABS actuator and electric unit (control unit).

Front wheel sensor

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Rear wheel sensor

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INDIVIDUAL FUNCTIONS WITHIN THE SYSTEM 

The wheel sensor reads a magnetic field change.

INDIVIDUAL OPERATION 

• Downsizing and weight reduction is aimed for. IC for detection portion and magnet for sensor rotor are adopted.

  Courtesy of NISSAN NORTH AMERICA, INC.

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