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Home >> Saturn >> 2002 >> SC2 Automatic, MP6 >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc Brakes & Drum Brakes >> Description & Operation

Description & Operation

The conventional (base) brake system consists of front disc brakes and rear drum brakes, with power assist. An optional Anti-Lock Brake System (ABS) is available.

The master cylinder is a dual circuit unit designed for use in diagonally split hydraulic systems. With a diagonally split system, the left front and right rear brake are on one hydraulic circuit, while the right front and left rear are on the other.

Threaded into the rear brake lines are integral brake proportioning valves, which limit fluid pressure to the rear brakes after a predetermined rear brake pressure has been reached. These valves are used to minimize the occurrence of rear wheel lock-up when brakes are applied and vehicle is lightly loaded in the rear.

A brake fluid level switch is located in the brake fluid reservoir (attached to master cylinder). The switch will activate the RED BRAKE indicator light (located on instrument panel) should brake fluid level become low. After brake fluid level is corrected and a moderately high brake pedal force is applied, indicator light should go off.