Toyota Camry Hybrid AHV40 Manual page 158

e. Brake System Stops or During Power Supply Malfunction
If the brake system stops or no accumulator pressure is supplied due to some malfunction, the skid
control ECU operates the fail-safe function. This function opens the master cylinder solenoid valve in
the brake actuator, in order to secure a fluid passage between the master cylinder and the wheel cylinder.
Thus, the brakes can be applied by operating only the front wheel cylinders under the fluid pressure
generated by the master cylinder. At this time, port (K) of the stroke simulator cut solenoid valve closes
in order to prevent the fluid pressure generated by the master cylinder from being negatively affected
by the operation of the stroke simulator.
Brake Pedal
Stroke Simulator
Accumulator
Pump
Accumulator
Pressure Sensor
Port (C)
(3)
Port (G)
(7)
Front Left
Item
Master Cylinder Cut Solenoid Valve
(1) (2) (1), (2)
Port: (A), (B)
Pressure Appliance Solenoid Valve
(3), (4), (3), (4),
(5), (6)
Port: (C), (D), (E), (F)
Pressure Reduction Solenoid Valve
(7) (9) (7), (9)
Port: (G), (I)
Pressure Reduction Solenoid Valve
(8) (10) (8), (10)
Port: (H), (J)
Stroke Simulator Cut Solenoid Valve
(11) (11)
Port: (K)
CHASSIS - BRAKE
(11)
Port (K)
Port (A)
(1)
Port (D)
(4)
Port (H)
Port (I)
(8)
Wheel
Cylinder
Pressure
Sensor
Rear Left
(2)
Port (E)
(5)
Port (J)
(9) (10)
Wheel
Cylinder
Pressure
Sensor
Front Right
System OFF &
Fail-Safe Mode
OFF (Open) OFF (Open)
OFF (Close) OFF (Close)
OFF (Close) OFF (Close)
OFF (Open) OFF (Open)
OFF (Close) OFF (Close)
CH-57
Master
Cylinder
Pressure
Sensor
Port (B)
Port (F)
(6)
Rear Right
256CH111