Anti Lock Brake System

WARNING: This page is about a different car, the 1991 Oldsmobile Toronado, 1991 Cadillac Seville, 1991 Cadillac Eldorado, 1991 Buick Riviera, and 1991 Buick Reatta. However, it is still accessible from the selected car via links, so may be relevant.

The Bosch 2U Anti-Lock Brake System (ABS) increases vehicle steerability, directional stability and optimum deceleration in severe braking conditions on most road surfaces. The ABS monitors wheel speed and controls brake line pressure to eliminate uncontrolled skidding.

The ABS consists of an Electronic Brake Control Module (EBCM), hydraulic modulator, solenoid valves, pump motor, ABS valve relay, pump relay and wheel speed sensors on front and rear wheels. ABS system utilizes a 4-way hydraulic circuit - one circuit for each front and rear wheel.

Components unique to anti-lock equipped vehicles are covered under a separate article. See ANTI-LOCK BRAKE SYSTEM article in the BRAKES Section. All other brake system components are covered in this article.