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10-19 4890-00 6. HYDRAULIC CIRCUIT OF ABS 1) Normal Brake Operation (ABS is not working) Mode If the driver depress the brake pedal so that the ABS does not operate, the hydraulic pressure in the master cylinder increases through the vacuum booster and it is delivered to the wheel via the normal open inlet valve. At this moment, the normally-closed outlet valve is closed The speed of the wheel that hydraulic pressure is delivered reduces gradually. Solenoid valve Valve Open/Close Pump motor Inlet valve - Normal open (NO) valve Open OFF Outlet valve - Normal close (NC) valve Close |