The ABCs of ABS: Getting acquainted with anti-lock brakes

Despite our unseasonably warm temps so far, Chicago winters typically mean epidemic levels of snow, sleet and ice. Are your brakes up to the task once this warm-weather streak gives way to reality?

More specifically, can you say your anti-lock brakes are up to snuff, and are you comfortable using them properly? It’s a good idea to “get cozy” with these systems because they’re more likely to engage during winter months than at any other time of the year.

Better known by their abbreviation—ABS—anti-lock braking systems have existed for decades, yet somehow still seem new-fangled to many drivers. Perhaps that’s because baby boomers were taught to pump conventional non-ABS brakes during a skid and that mindset never entirely left us.

However, ABS-equipped vehicles are a different animal and, as such, require a separate and distinct approach. To understand why, it’s important to learn a little more about how ABS works.

In effect, ABS—not the driver’s foot—does the pumping to prevent wheel lockup. This means the driver should firmly press the brake pedal during a skid and allow the system to do the work. The system will bring the car to a stop faster, while enabling the driver to concentrate on steering, thereby increasing safety.

ABS performs this feat by rapidly applying and releasing the brakes—faster than the driver ever could—to achieve maximum braking performance, while falling just short of having the wheels lock up.

Becoming accustomed to the “feel” of ABS is a great idea. When such systems kick in, a vibration or rapid pulsation might be felt in the brake pedal. It might feel as if the vehicle’s brakes are pushing back, which can be an unusual experience for many drivers. Grinding, buzzing or scraping noises might occur, which are evidence that the ABS is doing its job. Resist any temptation to decrease foot pressure or remove your foot from the brake pedal until the vehicle stops.

The National Highway Traffic Safety Administration (NHTSA) advises giving your car’s ABS a “mini road test” by driving your vehicle in an unobstructed parking lot at a speed fast enough to activate the ABS (typically at speeds exceeding 10 mph) and firmly applying the brakes and practicing not pumping the brakes.

If your ABS dashboard warning light illuminates frequently or is constantly on, chances are the system is malfunctioning and only your vehicle’s conventional brakes are working properly. Bring your vehicle into Hong Kong Auto Service and make sure your ABS is ready for the worst the Windy City can dish out. (Note: Your ABS light will usually flash on to tell you when the vehicle engages the ABS.)

Speaking of warnings, ABS systems aren’t designed to replace safe driving habits or good, old common sense. Don’t become overconfident just because your vehicle is equipped with state-of-the-art ABS. Practice the same attention to safe driving you would using a vehicle with conventional brakes.