Anti-Lock Brake System: Description
Anti-Lock Brake System (ABS) controls brake fluid pressures to each individual front and rear brake calipers during a panic stop to prevent wheel lock-up. System consists of actuator, solenoid relay, pump motor relay, Electronic Control Unit (ECU), and a speed sensor at each wheel. If a system fault occurs, the ECU stores a self-diagnostic code(s) that can be retrieved to diagnose malfunction. Some models are equipped with an optional Traction Control (TRAC) system, which is integrated with the ABS system. See Fig 1.
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For more information on brake system, see BRAKE SYSTEM - DISC article in BRAKES section.