Base (Normal) Braking Mode

During normal braking, pressure is applied through the brake pedal. Fluid comes from the master cylinder, through the combination valve and into the Brake Pressure Modulator Valve (BPMV). The fluid travels through the normally-open Isolation Valve (ISO), past the normally-closed dump valve and out into the brakes.

During normal braking, the pump is not turned on. The low pressure accumulators and attenuators are empty with only residual pressure stored in them.

The Electronic Brake Control Module (EBCM) constantly monitors wheel sensor inputs for rapid deceleration. If the Antilock Brake System becomes disabled for any reason, the driver will always have foundation brakes. The normally-open ISO valve and normally-closed dump valve will remain in these positions to allow normal fluid pressure to the wheels.