ABS (Anti-lock Braking System)

ABS stands for Antilock Braking System – a standard safety feature in all modern cars. The antilock braking system, in the simplest of terms, uses a system of wheel sensors to prevent the vehicle’s wheels from locking up under heavy braking, helping maintain grip with the road, and avoid skidding or hydroplaning.

First introduced for use in aircraft in the 1950s, ABS is now a feature in all modern cars sold in Europe. Cars with this feature are statistically less likely to be involved in a fatal crash, stray from the road, or collide with other vehicles on wet roads.

ABS is generally part of an overall stability system, designed to monitor wheels individually under heavy braking. Sensors mounted on each wheel constantly monitor the speed at which the wheels are turning as part of this system.

If any irregularities are detected, such as one wheel turning more slowly than the others during braking, the ABS system will intervene in order to prevent locking. This intervention takes place in the form of a very short brake release, followed by rapid brake ‘pumping’, or applying the optimum brake pressure to the wheel repeatedly, allowing the wheel to free up and continue spinning. This should allow the driver to retain or regain control of the vehicle, and avoid skidding or hydroplaning.

ABS system failures are rare – but put vehicles at risk of loss of traction, skidding, and hydroplaning under heavy braking conditions. The system is generally designed to give drivers a warning at the first sign of an issue – this may be in the form of a warning light or console notification. There are, however, other indicators of an ABS issue;

• Unresponsive or slow brake pedal – in most cases, this issue will worsen over time, with the brake pedal becoming more difficult to operate. An unresponsive brake pedal is a significant safety issue and should be rectified as soon as possible by a qualified mechanic or technician.
• Brakes locking up – the ABS system is designed to prevent brake locking, however, faults in the system can cause erratic braking and pumping. Faults causing brake locking may also result in random clicking noises.
• Brake pedal requiring effort to push – the brake pedal becoming progressively more difficult to push down is often a sign of an issue with the abs system and should be investigated as soon as possible.

Being aware of these warning signs, and taking the vehicle to a qualified mechanic as soon as they arise will ensure that your ABS is functioning effectively. Auto Service & Tuning Centre is highly experienced in ABS repair and replacement procedures. If your vehicle is displaying any of these symptoms, contact us today – one of our team members will be happy to provide you with further advice or arrange a booking for diagnosis or repair.

The ABS system uses sensors placed on each wheel to measure rotational speed, and ensure the vehicle is stable and under control – particularly under heavy braking conditions. This system tends to flag any abnormal signals in the form of an ABS warning light or console notification. This light can be steady or may flash a number of times. This may assist in identifying the issue – drivers may refer to their vehicle’s manual for further information.

It is important to note that issues other than wheel locking and speed can trigger warning lights, including, but not limited to blown fuses, or low brake fluid levels.

ABS is most effective on a firm road surface when brakes are promptly and firmly applied. It is commonly noted that the system is significantly less effective when applied on unstable road surfaces, such as snow, ice, or gravel.