Wheel Speed Sensor: Service and Repair

REMOVAL
Pre-removal Operation:
- Splash Shield Removal.

Follow removal steps outlined in illustration.

Removal Service Points
Front ABS Rotor/Rear ABS Rotor Removal.

CAUTION: Do not damage ABS rotor teeth and never drop the ABS rotor. If the ABS rotor has missing teeth or is deformed, accurate wheel speed detection cannot be expected and the system may fail to function normally.

Front Speed Sensor / Rear Speed Sensor Removal.

CAUTION: When removing the speed sensor from the knuckle, be careful not to strike the tip of the pole piece against the ABS rotor teeth or any other parts.

INSPECTION

Speed Sensor Check
1) Check the tip of the speed sensor pole piece for deposits of metal or other foreign matter and clean the pole piece as necessary.
Also check the pole piece for damage and replace if damaged.

CAUTION: The speed sensor pole piece is magnetized by a bulletin magnet inside the sensor, so it tends to attract metal. If the pole piece is damaged, accurate wheel speed detection may not be expected.

2) Measure resistance between speed sensor terminals.

Standard value:
Front 1.44 - 1.76 k ohms.
Rear 1.0 - 1.3 k ohms.

If the internal resistance of the speed sensor is out of specification, replace with a new one.

3) Check the speed sensor cable for open circuit and replace if faulty.

NOTE: Remove the cable clamp from the body and, while flexing the cable near the clamp, check for temporary open circuit. Also check connector connection and terminal insertion.

Toothed ABS Rotor Check
Check whether the ABS rotor teeth are broken or deformed. Replace the ABS rotor if the teeth are damaged or deformed.

INSTALLATION
Installation in reverse order as removal.

Installation Service Points

>A< Rear Speed Sensor Installation.
Insert a feeler gauge between the speed sensor pole piece and the ABS rotor tooth surface and tighten the speed sensor to specified torque where the clearance is as specified all around.

Standard value: 0.2 - 0.7 mm (0.008 - 0.028 inch)

>B< Front Speed Sensor Bracket Installation.

NOTE:
1) The right and left speed sensor brackets differ in shape. Install correctly referring to the identification symbols.
FR: For front speed sensor
R: For right wheel
L: For left wheel
2) After installation of the speed sensor to the bracket, check that the letters "FR" are visible.

>C< Front Speed Sensor Installation.

CAUTION: Handle the speed sensor carefully so as not to strike the tip of the pole piece or the ABS rotor teeth against any metal parts and damage them.

Insert a feeler gauge between the speed sensor pole piece and ABS rotor tooth surface and tighten the speed sensor to specified torque where the clearance is as specified all around.

Standard value: 0.3 - 0.9 mm (0.012 - 0.035 inch)

Post-installation Operation:
- Splash Shield Installation. (Front Only)