Wheel Speed Sensor: Testing and Inspection
TESTING THE WHEEL SPEED SENSOR1. Check pulser for chipped or damaged teeth and replace as necessary.
Fig. 82 Measureing Front Speed Sensor Air Gap:
2. Measure air gap between sensor and pulser all the way around while rotating driveshaft by hand, Fig. 82. If gap exceeds its maximum specification at any point, the knuckle is most likely distorted and should be replaced. Air gap should be 0.016-0.039 inches.
WHEEL SENSOR SIGNAL CONFIRMATION
1. With ignition switch off, disconnect 6-P inspection connector from connector cover on crossmember under passenger seat and connect it to anti-lock brake checker tool Nos. 07HAJ-SG0010A or 07HAJ-SG0010B, or equivalents.
2. Raise and support vehicle so all four wheels are off ground.
3. Turn ignition switch to on position, then turn mode selector switch on anti-lock brake checker to 0.
4. With transaxle in Neutral position, rotate each wheel at least one revolution per second and confirm that its respective monitor light on the checker blinks as wheel is rotating. Rotating wheel too slowly will produce only weak blinks of monitor lights. Perform tests in shaded area, as monitor lights may be difficult to see in bright sunlight. If the front wheels won't spin fast enough to get monitor indication, start engine and slowly accelerate and decelerate front wheels.
5. If any monitor light fails to blink, check the suspected sensor, its air gap, wiring and connectors.