How to Test the Condition of a Wheel Speed Sensor?
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Methods to test the condition of a wheel speed sensor: 1. Check the gap between the wheel speed sensor and the gear ring. The normal standard value for the front wheel is 1.10 to 1.97mm, and for the rear wheel, it is 0.42 to 0.80mm. If the gap is too large, it will directly affect the sensor's data collection and accuracy. 2. Inspect the output voltage section. First, lift the vehicle to raise the tires off the ground and release the parking brake. 3. Remove the ABS wheel speed sensor wiring harness connector and proceed with direct measurement. 4. Rotate the wheel at a speed of 1 revolution per second and measure the output voltage with a multimeter. The normal range for the front wheel is 190 to 1140mV, and the rear wheel should exceed 650mV. If these standards are met, it indicates that the wheel speed sensor is functioning properly at this time.