How many wheel speed sensor faults have there been?
This week we have had three different wheel speed sensor faults with interesting problems. All of which needed some detailed testing to resolve complications:
How can I tell if my wheel sensor has failed?
Slowly spin the hub or axle which will produce the voltage, if no readings can be found the sensor has failed and replacement is required. This is a typical reading from a wheel sensor. Configuration of the sensor mounting is different for each manufacturer but follow the same operation.
What does a broken wheel speed sensor do?
The wheel speed sensor also monitors wheel speed and sends the data to the traction control system; which is why this warning sign is commonly due to a worn out or broken wheel speed sensor. As with the ABS system, traction control is a safety device for cars, trucks, and SUVs.
Why does my ABS wheel speed sensor stop working?
Connect a code tool to pin point the sensor, or check them manually. These sensors are subject to road conditions and vibrations which can cause them to short out and stop working. Follow the guide below to perform a sensor test using a voltmeter.
What happens when the wheel speed sensor does not work?
ABS does not work properly The anti-lock braking system is designed to apply smooth application of brake fluid to engage the brake calipers and pads to slow your car without locking up the tires. The wheel speed sensor is responsible for relaying the wheel speed to the ECU so that it can tell the ABS system how much pressure to safely apply.
What was the first wheel speed sensor fault?
The first was a Volkswagen Passat – The car came to us with a bit of history as another garage had looked at the car first and read a fault code which said “wheel speed sensor LHF incoherent”. They had tried fitting a wheel speed sensor but the fault was still present.
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.
How are wheel speed sensors used in traction control?
Wheel speed sensor use in traction control. On vehicles equipped with traction control, wheel speed sensors are used by the ABS computer to sense wheel slippage. If a slip is detected, the computer will make sure brake pressure is applied to the affected wheel. This helps the vehicle maintain traction, especially during heavy acceleration.