How To Turn Off ABS Light? Detailed Guides With Extra Tips - Tireer

The ABS light shines when there is an issue with the Anti-Lock Braking System. In order to better understand why it lights up, let's have a closer look at the ABS and its crucial role in road safety.

1. The Inception of ABS

The concept of the Anti-lock Braking System was first introduced to the world in the early 1950s for use in aircraft. The Dunlop Maxaret, which was a fully mechanical system, was introduced in the UK and saw notable use in some aircraft models to prevent wheel lock-up upon landing.

ABS made landing much safer and smoother, though it wasn't until the 1970s that it was introduced in passenger cars. Mercedes-Benz was the first car manufacturer to introduce a fully electronic ABS in a production car with the S-Class (W116) model in 1978.

The system greatly improved the safety credentials of what was the safest vehicle of its era, providing stability under braking and much shorter stopping distances on wet, snowy, and icy surfaces.

2. What is ABS and How it Works

ABS, short for Anti-lock Braking System, is a safety feature installed in modern vehicles to prevent the wheels from locking up (ceasing rotation) and skidding uncontrollably under heavy braking.

The system can greatly improve stability under braking, allowing the driver to have control of the vehicle's steering. Without ABS, when the wheels lock up, the driver can't steer the vehicle in any direction without losing control. ABS remedies that and allows the driver to steer the vehicle and avoid potential collisions.

But ABS has other advantages as well. Namely, tests have shown that cars with ABS allow for shorter stopping distances, particularly in wet, snowy, and icy conditions. Thus, overall, a car with ABS will be much safer to drive, especially in the hands of inexperienced drivers.

The system works by automatically adjusting the brake pressure to each wheel to prevent lock-up and increase traction. It uses the principles of threshold and cadence braking, which were used by professional racing drivers before the introduction of ABS.

Still, modern ABS systems are much more effective than the racing drivers of yore, thanks to the use of chips and sensors. Here is what constitutes a modern ABS:

• Speed sensors: these monitor the rotational velocity of each wheel and send the information to the ABS module.
• Control module: this part constantly monitors the signals it receives from the four sensors (one for each wheel). When it receives a signal that one of the wheels locks up (rotational velocity is near zero), it triggers a response that will release the brake pressure for a short period.
• Pump and valves: the control module controls the pump and valves inside the braking system, which can reduce the hydraulic pressure to reduce the braking force.
• Modulation: when the pump and valves reduce the pressure inside the braking system, the wheel will unlock and turn slightly. Then, the ABS control module will receive a signal that the wheel started turning again and will increase the pressure to maximize braking force. This rapid modulation happens multiple times every second on modern cars, where the module is powerful enough to process a lot of data at any given moment.

The ABS operation will continue as long as the driver has depressed the braking pedal to the metal, i.e., as long as there is high pressure inside the braking system. So, for most of your daily driving, the ABS might never engage. When it engages, though, you will feel strong vibrations coming through the brake pedal.

3. Why Does the ABS Light Come On?