Wheel Speed Sensor: Service and Repair
WHEEL SPEED SENSORFront Wheel Drive:
All Wheel Drive:
REMOVAL SERVICE POINTS
A FRONT ROTOR / REAR ROTOR REMOVAL
CAUTION: Do not damage rotor teeth and never drop the rotor. If the rotor has missing teeth or is deformed, accurate wheel speed detection cannot be expected and the system may fail to function normally. Use particular care in handling the front rotor of an AWD vehicle as it cannot be disassembled.
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 rotor teeth or any other parts.
INSTALLATION SERVICE POINTS
A REAR SPEED SENSOR INSTALLATION
Insert a feeler gauge between the speed sensor pole piece and the 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 (.008 - .028 in.)
NOTE: The rear speed sensor pole piece-to-rotor tooth surface clearance is not adjustable in the case of AWD vehicles. In this case, measure the sensor mounting surface-to-rotor tooth surface clearance.
Standard value: 28.15 - 28.45 mm (1.11 - 1.12 in.)
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 rotor teeth against any metal parts and damage them.
Insert a feeler gauge between the speed sensor pole piece and 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 (.012 - .035 in.)
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 built- in 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:
Rear: 0.6 - 0.8 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.
ROTOR CHECK
Check the rotor for missing or worn teeth and replace if faulty.