Wheel Speed Sensor: Service and Repair

WHEEL SPEED SENSOR REMOVAL AND INSTALLATION





SPEED SENSOR INSPECTION





(1) Check whether any metallic foreign material has adhered to the parts shown in the illustration at the speed sensor tip, and it so, remove it.

NOTE: The section shown in the illustration can become magnetized because of the magnet built into the speed sensor, with the result that foreign metallic material is attached to it.


(2) Measure the resistance between the speed sensor terminals.

Standard value: 1.0 - 1.2 k Ohms

If the internal resistance of the speed sensor is not within the standard value, replace with a new speed sensor.

(3) Check the speed sensor cable for breakage, damage or disconnection; replace with a new one if a problem is found.

NOTE: When checking for cable damage, remove the cable clamp part from the body and then bend and pull the cable near the clamp to check whether or not an intermittent contact results. Check the connector connection and the terminal insertion.

SPEED SENSOR INSULATION INSPECTION








(1) Remove all connections from the speed sensor, and then measure the resistance between terminals (1) and (2) and the body of the speed sensor.

Standard value: 100 k Ohms or more

(2) If the speed sensor insulation resistance is outside the standard value range, replace with a new speed sensor.

TOOTHED ROTOR





Check whether rotor teeth are broken or deformed, and, if so, replace the rotor.

FRONT SPEED SENSOR/REAR SPEED SENSOR INSTALLATION





The clearance between the speed sensor and the rotor's toothed surface is not adjustable, but measure the distance between the sensor installation surface and the rotor's toothed surface.

Standard value: 28.2 - 28.5 mm (1.11 - 1.12 in.)