Operation CHARM: Car repair manuals for everyone.

Base Brake System

Under normal operating conditions, the brake system operates using conventional braking by the following means:
- The brake pedal force
- The vacuum booster
- The master cylinder

The ABS functions much like a standard brake system. The brake pressure generated by the master cylinder passes through the Brake Pressure Modulator Valve (BPMV) to the wheel brakes unaffected by the ABS during normal driving conditions.