2000 TOYOTA CAMRY Service Repair Manual

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TOYOTA CAMRY 2000  Service Repair Manual 74CHASSISÐBRAKES
b.  Reservoir Cut Solenoid Valve
When the TRAC system is active, a signal from the ABS & TRAC ECU causes the reservoir to cut solenoid valve
to turn ON in order the circuit from the

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TOYOTA CAMRY 2000  Service Repair Manual 75 CHASSISÐBRAKES
3) Operation
The hydraulic system of the TRAC system consists of the following 2 circuits; the front right and front left. Although
the hydraulic circuit described below is one circ

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TOYOTA CAMRY 2000  Service Repair Manual 76CHASSISÐBRAKES
b.  During Vehicle Acceleration (TRAC System Activated)
When a front wheel slips during acceleration, the TRAC system controls the engine output and braking of the front
wheels to he

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TOYOTA CAMRY 2000  Service Repair Manual Pressure Reduction ValveOFFPort FClosed
PumpONRotating

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TOYOTA CAMRY 2000  Service Repair Manual 78 CHASSISÐBRAKES
 ii) Pressure Holding Mode
When the fluid pressure in the wheel cylinder is increased or decreased to attain the required pressure, the ABS &
TRAC ECU sends a control signal to turn

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TOYOTA CAMRY 2000  Service Repair Manual 79CHASSISÐBRAKES
 iii) Pressure Reduction Mode
When the fluid pressure in the wheel cylinder needs to be decreased, the ABS & TRAC ECU sends a control signal
to turn the pressure reduction valve ON,

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TOYOTA CAMRY 2000  Service Repair Manual 80 CHASSISÐBRAKES
ABS & TRAC ECU
1) Wheel Speed Control
The ABS & TRAC ECU constantly receives signals from 4 speed sensors and calculates the speed of each wheel and
vehicle  speed.
During sudden ac

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TOYOTA CAMRY 2000  Service Repair Manual 81CHASSISÐBRAKES
2) Initial Check
An initial check is carried out once every a few seconds after the ignition was turned on. The functions of each
solenoid valve and pump motor in the actuator are ch