The role of the wheel speed sensor, how to detect the wheel speed sensor

formodernFor automobiles, wheel speed information is essential. However, there are still some friends who don't know enough about this part, and they haven't even heard of the name. So, what exactly is the function of the wheel speed sensor, and how to detect the wheel speed sensor, today we will give you answers one by one.

The wheel speed sensor is mainly a sensor used to test the wheel speed of a car, and the detected rotation frequency signal will be directly transmitted to the car's ABS computer. When the wheel speed sensor detects that the wheel reaches 40km/h, the ABS system will begin to intervene. Then when the car is braking, with the help of the ABS system, the pressure of the brake pump will be automatically adjusted to prevent individual wheels from locking up, which improves the safety of the car to a certain extent.

Wheel speed sensor detection method

1. First, we need to check the gap between the wheel speed sensor and the ring gear. The normal standard value of the front wheel is 1.10-1.97mm, while the rear wheel is 0.42-0.80mm. If the gap is too large, it will directly affect the collection of the wheel speed sensor and the accuracy of the data.

2. Then go to check the output voltage part. Raise the car to lift the tires off the ground and release the parking brake.

3. Remove the ABS wheel speed sensor harness connector, and then directly measure.

4. Rotate the wheels at a speed of 1/2 revolution per second, and measure the output voltage with a multimeter. The normal range of the front wheel is 70-310mV, while the rear wheel needs to be greater than 260mV. If it meets the standard, it means that the wheel speed sensor is working normally at this time.