The ABS ( anti-lock braking system) tests itself each time the ignition is turned on. If a defect is detected for whatever reason, the ABS turns itself off and the ABS warning light is turned on, normal braking system is then used on its own. The driver is alerted to a problem by the ABS dash warning light staying on.
Our technicians carry equipment able to communicate with the cars ABS Diagnostics system, locate the problem with the ABS light and replace any defective parts and reset any dashboard lights.
The anti-lock braking system (ABS) works by limiting, applying and releasing the pressure to any wheel that decelerates too quickly. This allows maximum stopping force to be applied without the brakes locking-up and the car skidding.
While the vehicle may still be drivable even though the ABS warning light is on, the braking system is an important system no driver should be without. Should your ABS warning light come on, you should have the cause of the ABS failure diagnosed and repaired immediately to prevent further harm to your vehicle and its passengers.
A typical ABS is composed of a central electronic control unit (ECU), four wheel speed sensors (one for each wheel), and two or more hydraulic valves within the vehicle brake circuit. The ECU constantly monitors the rotational speed of each wheel. When it senses that any number of wheels are rotating considerably slower than the others, it actuates the valves to decrease the pressure on the specific braking circuit for the individual wheel, effectively reducing the braking force on that wheel. The wheel(s) then turn faster; when they turn too fast, the force is reapplied. A typical anti-lock system can apply and release braking pressure up to 20 times a second.
There are many reasons that can cause the ABS warning light to come on. Some are serious, and therefore a diagnostic check should be done immediately. But there are occasions when the ABS warning light comes on and can be met with a simple and inexpensive solution. For example, a dirty or faulty ABS wheel sensor can cause the system to trigger the ABS warning light during self-evaluation.