ANTILOCK BRAKE SYSTEM
04–13–4
Hydraulic circuit diagram
Operating
Normal braking or pressure increase mode
• During normal braking or pressure increase mode the inlet and outlet solenoid valves are not energized: the
inlet solenoid valve is open and the outlet solenoid valve is closed. Brake fluid pressure from the master
cylinder flows through the inlet solenoid valve and is transmitted to the caliper piston. At this time, the pump
motor does not operate. (Description for single front wheel only)
Solenoid valve operation table
RFLRRRLF
MASTER CYLINDER
DAMPER CHAMBER
RESERVOIR
PUMP MOTOR
PUMP
OUTLET
SOLENOID
VALVE
RESERVOIR
INLET
SOLENOID
VALVE
OUTLET
SOLENOID
VALVE
OUTLET
SOLENOID
VALVE
OUTLET
SOLENOID
VALVE
INLET
SOLENOID
VALVE
E5U413ZS5003
Inlet solenoid
valve
Outlet solenoid
valve
Pump motor,
pump
OFF (open) OFF (closed) Stopped
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