Toyota Camry Hybrid AHV40 Manual page 163

CH-62
4) TRAC Operation
D The fluid pressure generated by the pump is regulated by the pressure appliance solenoid valve and
pressure reduction solenoid valve to the required pressure. Thus, the wheel cylinders of the drive
wheels are controlled in the following 3 modes: pressure reduction, pressure holding, and pressure
increase modes, to restrain the slippage of the drive wheels.
D The pressure appliance valve and the pressure reduction valve are turned ON/OFF according to the
ABS operation pattern.
D The diagram on the next page shows the hydraulic circuit in the pressure increase mode when the
TRAC function is activated.
"
System Diagram
Brake Actuator
Wheel Cylinder
Pressure Sensors
Speed Sensors
Stop Light Switch
Combination Meter
Master
Warning Light
Multi-information
Display
Brake System
Warning Light
Slip Indicator Light
Yaw Rate and
Deceleration Rate Sensor
Steering Angle Sensor
Service Tip
A service mode has been created for '07 Camry Hybrid model. In this mode, TRAC and VSC
functions can be forcibly turned OFF, either through the operation of a hand-held tester or by
operating the shift lever and depressing the accelerator pedal.
For details, refer to the 2007 Camry Hybrid Vehicle Repair Manual (Pub. No. RM02H0U).
CHASSIS - BRAKE
A
Skid Control
ECU
Brake Actuator
Pressure Appliance
Solenoid Valves
Pressure Reduction
Solenoid Valves
THS ECU
EPS ECU
CAN
(CAN No.1 Bus)
Motive Force
Control
Assist Torque
Control
02HCH24P