During Normal Braking
No solenoid valves are energized. The ports of the inlet solenoid valve and cut solenoid valve are open, while the ports of the outlet solenoid valve and suction solenoid valve are closed.
In this state, the fluid pressure generated by the master cylinder can be applied to the wheel cylinder through the open ports of the cut solenoid valve and inlet solenoid valve.
NOTE:
For simplicity of explanation, operation of the hydraulic unit is represented by operation of a single wheel circuit.