ABS WHEEL-SPEED SENSOR CONSTRUCTION/OPERATION


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Construction


Front

•  The front antilock brake system (ABS) wheel-speed sensor is installed on the steering knuckle and the rear ABS sensor rotor is integrated with the drive shaft. Therefore, if there is any malfunction on the front ABS sensor rotor, replace the drive shaft.
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Rear

•  The rear ABS wheel-speed sensor is installed on the rear knuckle and the rear ABS sensor rotor is integrated with the rear drive shaft. Therefore, if there is any malfunction on the rear ABS sensor rotor, replace the rear drive shaft.
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Operation


Front and rear

•  As the ABS sensor rotor rotates, magnetic flux formed from the permanent magnet varies and alternating current is formed with an electromagnetic conductor. Using this alternating current, rotation speed is expressed as a varying proportional cycle and from detection of this cycle the control module (CM) part of the dynamic stability control (DSC)/roll stability control (RSC) hydraulic unit (HU)/CM can then detect the wheel rotation speed. While the structures of the front and rear ABS wheel-speed sensor differ, the operation is the same.
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