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. See Fig 1. Some models are equipped with an optional Traction Control (TRAC) system, which is integrated with the ABS system.

Fig 1: Identifying ABS Component Locations

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