Description of functions

The speed sensor detects the wheel speed and sends the signal to the skid control computer. These signals are used for ABS control.

The speed sensor detects magnetic field changes in the magnetic rotor, where the N and S poles are evenly allocated in a circumferential direction, and generates a vehicle speed pulse.

With this vehicle speed pulse, the skid control computer detects the speed for each wheel.

NOTE: The following voltage outputs are the values when the vehicle harness connectors are connected to the skid control computer (brake actuator assembly) and the speed sensor.

Fig 1: Speed Sensor Output Characteristics

Courtesy of SUBARU OF AMERICA, INC.

Diagnostic codes	DTC detecting conditions	Faulty part
C1332 C1333	Short circuit occurs in the power supply or the signal line of the speed sensor.	Rear speed sensor Wiring harness or connector Skid control computer (brake actuator assembly)
C1466 C1467	Signal values are outside the specified range when signals of the four speed sensors are compared. An abnormal wheel speed is detected.	Rear speed sensor Rear speed sensor, poor installation Wiring harness or connector Speed sensor rotor Skid control computer (brake actuator assembly)