4 Symptoms of ABS Wheel Speed Sensor Failed – Modern vehicle braking systems are far more secure than the old systems. One of them is because of the presence of the ABS sensor. This sensor will detect wheel rotation in such a way that the ABS module will adjust the fluid pressure requirements at each wheel of the vehicle. This makes the car anti-skid even though it passes through wet, slippery, or sandy roads.
ABS Wheel Speed Sensor
ABS (Anti-lock Braking System) is a braking system that has the ability to withstand excessive wheel locking. The anti-lock brake sensor or ABS sensor is a type of tachometer that measures the rotational speed of the wheels and transmits it to the Engine Control Module (ECM) of the car, see: ECM vs ECM vs PCM. The ABS sensor is also called the wheel speed sensor or ABS brake sensor. Since all wheels are not turning at the same speed, the ABS sensor reports the speed of all four wheels to the ECM, based on the ECM determining whether the wheels are locked or not. The application of ABS brakes is faster than manual brakes. Therefore, when ABS is working properly, it makes a grinding sound in some cars.
Location of ABS wheel speed sensor
The ABS sensor is paired with the ring gear. The rings are mounted on components such as the brake rotor and brake drum. The ABS sensors in newer systems are mounted in the wheel hub assembly itself. Usually, the sensors are attached with a small screw measuring 8 or 10 mm.
The sensors installed in a car depend on the type of braking system. Old cars usually, only use two ABS sensors located on the front wheels only. Modern cars usually equip ABS sensors on all four wheels of the vehicle. Rarely or so far I have not encountered any ABS sensors that are only installed one or two pieces on the rear wheel.
Mechanism of ABS wheel speed sensor
The ABS sensor is typically made up of a toothed ring and a magnet with coils inside. The contact between the rings and the magnet induces an electric field that triggers signals, which are then turned into digital signals by the controller. This then determines each wheel’s speed accordingly in order for maximum performance from your car.
The sensor shown above is a basic sensor that can be found on a Honda but the sensors range in look and size from a car to a car.
Most new cars now have some form of traction control where ABS is the key. When one tire loses grip and you start spinning, the computer can regulate braking force and achieve the desired traction. The ABS sensor is an important part of this system- it sends information to ECM that one wheel has lost contact with the ground (in which case it lowers brake force). If this happens, the car also stops turning around when its front wheels are locked up again so the car doesn’t flip over sideways! Most modern vehicles also have a combination of electronic stability control systems to ensure safety as well as electronic traction controls for a safe driving experience.
4 Symptoms of ABS Wheel Speed Sensor Failed
The ABS sensor sends a signal to the computer. If you notice that your car makes noise when driving, because it doesn’t have enough power or if there’s no response from the pedals and brakes, then check both sensors in case one is malfunctioning. Another sign of an ABS sensor problem would be poor steering control such as making tight turns or drifting out of lane too much
The ABS wheel speed sensor has multiple functions, so it is a vital part of your automobile. When one begins to fail, you might notice several symptoms.
The most common symptom of a bad ABS sensor is an ABS warning light showing up on your dashboard; the second sign that something’s not quite right could be when the brake pedal starts pulsating or if anti-lock braking system malfunctions start occurring with high frequency.
Here are a few of the most common symptoms your ABS control module will give you as a response to an ABS wheel speed sensor that has gone bad. However, these aren’t all the possible symptoms because of how precise and specific modern cars have become in terms of making sure everything works properly.
ABS Indicator Light On
If a wheel speed sensor fails, you will likely notice the ABS light in your dashboard. The wheel speed sensor is one of many crucial components that make up an automobile’s automatic braking system. In order to function properly and avoid accidents, it must be functioning exactly as intended. Your car needs this component to detect when there is not enough traction on all four wheels before it will activate its brakes automatically for maximum safety.
If you notice your ABS light is on, it’s a good idea to pull over and have the wheel speed sensor repaired. The following can also indicate bad wheel sensors: slow response when turning or accelerating, tire wear increase without increased mileage for that vehicle’s make/model.
As with most automotive components, the ABS wheel speed sensor is designed to outlast other parts. On average, they are expected to last approximately eight years before needing replacement. If you have recently purchased a new vehicle and find that your speedometer has stopped working correctly or registering any readings at all yet your wheels still spin freely as if there was no problem with the sensors whatsoever, it’s likely you have an old defective ABS wheel speed sensor on hand!
Brake Pedal Vibrates when braking
ABS sensors measure the rotational speed of each wheel. And if one of the ABS sensors is faulty, it will read the wrong speed on one or more wheels. This will cause the ABS control module to be fooled. The module may read that the wheel is in a non-slip condition but is actually in a skidding position. Or vice versa, the wheel slips but it reads the wheel is not slipping. This is very dangerous.
When you apply the brakes, they will automatically engage and keep your car from sliding and spinning out. The ABS is capable of detecting when a wheel has locked up or slipped in an emergency stop thus allowing it to brake that one wheel faster than the other ones (which would otherwise cause tire lock) so as not to skid uncontrollably into whatever might be ahead of you at high speed.
Loss of ABS effect
The ABS system uses sensors to detect when the wheels are slipping or spinning. When it detects a problem, the computer in your car sends an alert that triggers various warnings on your dashboard and a warning light on the steering wheel. If you see these symptoms of problems with your vehicle’s braking system, visit a mechanic immediately for diagnosis and repair as soon as possible
When the sensor stops receiving data, it is unable to determine if the wheels are locking up and need support. As a result of this loss in information, the vehicle’s computer does not know how to measure brake pressure properly and relies on other inputs instead.
When the system is not in use, it shuts down until repairs have been made.
Loss of Traction Control
First of all, when the sensor stops sending information to the computer, systems such as stability control and traction control will stop working. Secondly, roll stability won’t be available either; without that function, your vehicle could roll away on a sharp turn or even flip over! Finally, hill-start assist will also be cut off because it relies on signals from the other sensors to work properly.
You might have experienced problems even when the ABS light is not on. If you notice issues with braking in adverse weather conditions or handling, it could be because of an issue with your ABS wheel speed sensor.
It could also be caused by damaged wiring connections running from the sensor to the ECM.
Can we drive with a bad ABS sensor?
When an ABS fault is indicated by a brake light, there is no need to panic. Depending on the season and frequency of poor surface conditions in your area, this could be different for each person. In wintertime, you should remember that if braking on any slippery surface without ABS it will feel as though the vehicle isn’t equipped with ABS at all – locked wheels, no steering, and diminished control. But the brakes still have their functionality from when they were brought out of the factory; just not automatic assistance in dangerous situations.
The ABS light is yellow for a reason – it indicates caution should be taken while driving the vehicle, but there’s no imminent need to stop. It’s wise to get the system checked out sooner than later; however, waiting until your next paycheck isn’t a bad timeframe. Just be aware of your vehicle’s limitations with the ABS system disabled and drive accordingly.