ABS (Anti-Lock Braking System) uses wheel speed sensors, a hydraulic control unit, and a computerized electronic control module, which is the "brain" of the system. When the brake pedal is applied, the electronic control module monitors the speed of the wheels through the wheel speed sensors. If the control module detects that one or more wheels are about to lock up, the module signals the hydraulic unit to control hydraulic pressure to that wheel or wheels. This varying of pressure is much like "pumping" the brake; only with the ABS system, the wheel that is locking up (causing a potential loss of control) is the only one being controlled, while the rest of the wheels are free to roll. This maximizes vehicle steerability.
With over 27 years in the automotive industry and nearly a decade in automotive talk radio, Tom Torbjornsen makes learning about cars easy with his personal manner, his expert advice, and his high energy and entertaining style. Tom has the unique gift of simplifying the complex and tearing down the technical, meeting you at your level of understanding. You will be encouraged as you gain the confidence to deal with problems related to the second most expensive purchase you will make in a lifetime - your automobile.
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