- Remove the wheel speed sensor from the vehicle.
Handle the sensor carefully and protect the tip at all times. Do not subject the pole piece on the end to any impact or abrasion.
- The pole piece may become magnetized during operation. Check carefully for any metallic material clinging to the tip.
- Inspect the pole piece carefully for any sign of cracking or contact with the toothed wheel. If any damage is found, replace the speed sensor.
- Use an ohmmeter to measure resistance between the pins of the sensor. Correct resistance should be 2.25-2.75 kilo-ohms.
- If resistance is outside the proper range, the sensor must be replaced.
- With the ohmmeter still connected, manipulate and pull gently on the cable, trying to expose a hidden break in the line. Do not use excess force. Be suspicious of areas where the cable bends or turns during routing.
- The toothed wheel should be inspected whenever the sensor is removed. Foreign matter should be removed without scratching or damaging the grooves. Inspect for any broken or chipped teeth; if any are found the toothed wheel must be replaced.
- Reinstall the wheel speed sensor.