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Diagnosing and repairing anti-lock brake systems.
Anti-lock brake systems (ABS) are designed to prevent your vehicle’s wheels from locking (and skidding) during emergency stops and other challenging conditions. How does ABS work? Using electronic sensors and high-pressure pumps, under certain conditions, your ABS system can measure your vehicle’s speed, wheel slip and the force you apply to the brakes. When the sensors detect a skid hazard, your ABS actually pumps the brakes for you -- with more speed and precision than a human driver can achieve.
How do anti-lock brakes help you? ABS helps you keep control of your vehicle when you stop suddenly or brake on slick surfaces. By preventing the wheels from locking, you maintain traction and steering as you stop -- instead of skid. On some vehicles, anti-lock brakes may also decrease the braking distance required to stop safely, but this isn’t their main purpose.
Your anti-lock brake light could be on as part of a routine system check, or it could be alerting you to a problem with your ABS brake system:
What to do when your ABS light turns on depends on when the light turns on:
Any time your ABS light stays on after startup, you should request an appointment at Midas for ABS service. After inspecting your ABS, your local Midas technician will explain exactly what's required and what’s optional, and provide you with a written estimate before any work is done.
Driving with the ABS light on is safe if your brakes are working normally -- but it’s less safe than driving with a functioning anti-lock-brake system. In situations where ABS would normally engage, you’re at heightened risk of brake lock and skidding if that ABS light is on. It’s a good idea to have your ABS system checked out at your earliest convenience.
It is unsafe to drive most vehicles with the ABS and brake light on simultaneously. On most vehicles, the brake light alerts you to problems such as low brake fluid or low brake pads. On some older vehicles, the brake light will kick in along with the ABS light to alert you to an ABS system problem. Unless your vehicle is one of these, it’s a good idea to err on the side of safety, consider your brakes unreliable, and see your local Midas expert as soon as possible.
If your brake pedal pulsates during sudden stops or on slippery roads, that’s probably your ABS in action, pumping the brakes. Keep your foot on the brake until your vehicle stops.
Several brake problems can cause brake pedal movement. Whenever your vehicle feels different without a clear explanation, request a Midas brake inspection appointment.
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