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
Inlet valve - Normal open (NO) valve
Outlet valve - Normal close (NC) valve
Valve Open/Close
Open
Close
10-19
4890-00
Pump motor
OFF