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35SUPRAÐNEW FEATURES
Pressure Holding Mode
After the fluid pressure in the wheel cylinder is
reduced or increased to the required pressure, a
control signal from the ECU causes ports A and D to
close. As a result, the system engages in the pressure
holding mode to maintain the fluid pressure in the
wheel cylinder.
Condition of Actuator
Part Name
Signal from
ABS ECUOperation
Pressure
Holding ValveONPort AClosed
Pressure
Reduction
Valve
OFFPort DClosed
Pump MotorONRotating
Hydraulic Circuit
Pressure Increase Mode
When the fluid pressure in the wheel needs to be
increased in order to apply more braking force, a
control signal from the ECU causes port A to open,
port D to close, thus engaging the increase mode.
Accordingly, the circuit will be in the same state as in
normal braking, in which the brake fluid is sent from
the master cylinder to the wheel cylinder to increase
the fluid pressure in the wheel cylinder.
The fluid pressure increase rate is controlled by
repetition of the pressure increase and pressure
holding mode.
Condition of Actuator
Part Name
Signal from
ABS ECUOperation
Pressure
Holding ValveOFFPort AOpen
Pressure
Reduction
Valve
OFFPort DClosed
Pump MotorONRotating
Hydraulic Circuit
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36SUPRAÐNEW FEATURES
3) ABS ECU
a. Wheel Speed Control
The ECU constantly receives signals form the 4±speed sensors and a deceleration sensor (2JZ±GTE engine model),
and estimates the speed and deceleration rate of the vehicle by calculating the speed and deceleration rate of each
wheel.
b. Initial Check
An initial check is carried out every time once after the engine has started and the initial vehicle speed exceeds 6 km/h
(4 mph).
c. Self±Diagnosis
If the ABS ECU detects a malfunction in the ABS, the ABS warning light and a master warning lights in the
combination meter will light up and alert the driver that a malfunction has occurred. The ECU will also store the codes
of the malfunctions.
SUSPENSION
1. General
The shock absorber of the 2JZ±GTE engine model with manual transmission has been changed from the
mono±tube, gas±filled shock absorber to the twin±tube, gas±filled shock absorber, which is the same type that is
used on the 2JZ±GE engine model.
The same rubber±integrated ball bushing that is used on the 2JZ±GTE engine model is used for the upper arm
bushing of the rear suspension of the 2JZ±GE engine model.
The brace rod of the rear subframe has been relocated to realize excellent riding comfort, in addition, this provides
excellent stability, an controllability.
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FOREWORD
To assist you in your service activities, this manual explains the main characteristics of the 1997 model year
vehicles, in particular providing a technical explanation of the construction and operation of new mechanisms
and new technology used.
This manual consists of the following sections.
1.
~ 11. Each Model ÐChanged features for each model are explained.
12. Appendix ÐMajor technical specifications of the vehicle.
CAUTION, NOTICE, REFERENCE and NOTE are used the following ways:
CAUTIONA potentially hazardous situation which could result in injury to people may occur if
instructions on what to do or not do are ignored.
NOTICEDamage to the vehicle or components may occur if instructions on what to do or not
do are ignored.
REFERENCEExplains the theory behind mechanisms and techniques.
NOTENotes or comments not included under the above 3 titles.
For the new features of the Camry, refer to the following New Car Features.
Manual Name
Pub. No.Date of issue
1997 Camry New Car FeaturesNCF134UJuly, 1997
All information contained herein is the most up±to±date at the time of publication. We reserve the right to make
changes without prior notice.
TOYOTA MOTOR CORPORATION
1996 TOYOTA MOTOR CORPORATION
All rights reserved. This book may not be reproduced or
copied, in whole or in part, without the written
permission of Toyota Motor Corporation.
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