How does the scan tool work on a wheel speed sensor?
The scan tool will display a speed input in miles per hour (mph) for each wheel speed sensor. Most wheel speed sensors (except for the latest generation of “active” WSS sensors) won’t generate a readable signal until a vehicle is traveling 3 to 5 mph or faster.
How can I tell if my wheel speed sensor is bad?
If you have a scan tool that can read ABS codes (not just engine/transmission codes), you can also check for wheel speed sensor codes on your vehicle. A scan tool that can also display the speed readings from each sensor while driving can also help you pinpoint which sensor is bad.
Which is more accurate, a WSS or a wheel speed sensor?
This type of sensor can generate a more accurate wheel speed signal at low speeds (down to 1 mph) than a magnetic WSS. It can also tell if the wheel is rotating forwards of backwards. With this type of sensor, the body control module or ABS module provides a reference voltage to power the sensor.
What kind of wheel speed sensor does ABS use?
Hall-effect sensors are often referred to as “active wheel speed sensors” and are more accurate than the magnetic type. On most vehicles made in the last couple decades, there are four wheel speed sensors — one at each wheel. Signals from these sensors are used by the ABS computer to determine how quickly the car is slowing.
The scan tool will display a speed input in miles per hour (mph) for each wheel speed sensor. Most wheel speed sensors (except for the latest generation of “active” WSS sensors) won’t generate a readable signal until a vehicle is traveling 3 to 5 mph or faster.
Is it normal for wheel speed sensor not to show 0 mph?
The ABS module monitors the change in frequency and amplitude as the wheel rotates. A sensor might not display 0 mph, but 3-5 mph; this is normal. But, if there is an unwanted activation at low speeds, using a scan tool may not be the best method. Do not get hung up on these low speeds; further tests are needed.
What are the signs of a bad ABS wheel speed sensor?
Signs of a Bad ABS Wheel Speed Sensor. By Mia Bevacqua. May 24, 2018. These are the most common problems associated with a faulty ABS speed sensor: Warning lights appear on the dashboard: If the ABS computer finds a problem with a wheel speed sensor or its circuit, it will trigger the ABS warning light on the dash.
How does a wheel speed sensor work Chrysler?
Active WSS sensors, which Chrysler refers to as “magneto-resistive” sensors, work like a “Hall effect” sensor and generate a square wave on-off digital signal that changes frequency with wheel speed. This type of sensor detects the change in magnetic polarity (flux) as the teeth on the tone ring or small magnets pass under it.