TOYOTA CAMRY 2000 Service Repair Manual

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SystemOutline
SRS Airbag
The SRS (Supplemental Restraint System) airbag is provided for the driver
and front passenger. The SRS airbag has been designed to lessen the shock to
the head and chest of the driver and front passenger in the event of a frontal
impact collision as a supplement to the seat belt.
A 1±sensor type airbag system is used in which the detection of decelera-
tion during a collision as well as control of the airbag system is accom-
plished by the airbag sensor assembly.
The basic construction and operation are the same as in the '96 Avalon.
However, the inflator for front passsenger and airbag sensor assembly have
been changed.
For details, see page 111.
Cruise Control System
Once it has been set at a desired vehicle speed, this system automatically
adjusts the engine throttle position to maintain the vehicle speed at the de-
sired speed without operating the acceleration pedal.
The basic construction and operation are the same as in the previous model.
However, in the new model, a new type acutator has been adopted. Also, the
functions of the cruise control ECU has been changed. For details, see page
116.
Moon Roof
The moon roof is a tilt±up and sliding type the same as in the previous mod-
el. This system includes ªkey±off operationº, which is the same as with the
power window system. The new model offers an additional ªone±touch slide
openº function which enables the moon roof to fully open when the slide
switch is pressed toward the opening side for a few seconds.
Electrical Remote Control Mirror
The electrical remote control mirrors used in the previous model are also
used in the new model. Also, the internal heater to remove water drops from
the mirror surface is provided.
Key Reminder System
When the driver's door is opened with the ignition key in the ACC or LOCK
position, this system sounds a buzzer to warn the driver that the ignition key
has not been removed.
The basic construction and operation are the same as in the previous model.

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 WIRELESS DOOR LOCK REMOTE CONTROL SYSTEM
1. General
The wireless door lock remote control system is a conventint system for locking and unlocking all the doors at a
distance.
The basic construction and operation of this system are the same as in the '96 Avalon. However, the following items
have been changed.
The trunk lid open operation, which is provided on the '96 Avalon, has not been adopted.
A panic alarm operation, which activates the alarm of the theft±deterrent system, has been newly adopted.
For ease of verification of the operation of this system, the parking lights and taillights flash to inform that the
operation has been completed.

System Diagram

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2. Layout of Functional Parts
The major functional parts of the wireless door lock remote control system are whown below.
3. Construction
Transmitter
The transmitter is a key±holder type, which is
separate from the ignition key. the lock and unlock
functions of all doors can be controlled by operating
the switches on the ransmitter. Also, this transmitter
is equipped with a panic switch which activates the
security alarm of the theft deterrent system.

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4. Function
The following table is a comparison of the functions of wireless door lock remote control system between the Camry
and the '96 Avalon.

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Panic Alarm Operation
When the ªpanicº switch of the transmitter is pushed, the theft deterrent system sounds the horns and flaashes the
headlights and taillights. To stop the alarm of the theft deterrent system that was triggered through this operation, push
the transmitter's ªunlockº switch or ªpanicº switch again.
Operation Verification Light Function
When the doors are locked by the transmitter switch
operation, the parking light and taillight flashes
once to confirm that the operation has been
completed.
Similarly, the parking light and taillight flashes
twice when the doors are unlocked.
Light Flash Patterns
Transmitter Recognition code Registration Function
As in the '96 Avalon, the recognition code for each transmitter is registered in an EEPROM contained in the wieless
door lock ECU. Up to 2 different recognition codes can be resistered in teh EEPROM. The procedure for registering
a registration code is the same as that used in the '96 Avalon.
For details of the rrecogition code registration procedure, refer to the 1997 Camry Repair Manual (Pub. No.
RM503U).

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 SRS AIRBAG
1. General
The SRS (Supplemental Restraint System) airbag is designed to help lessening the shock to the driver and front
passenger as a supplement to the seat belt. In a collision, the aribag sensor detects the shock and if the front±to±rear
shock is greater than a specified value, the airbags stored in the steering wheel pad for the driver and above the glove
box for the front passenger inflate instantly to help reducing the likelihood of the driver's or front passenger's head
and chest directly hitting the steering wheel or instrument panel.
As in the '96 Avalon, a 1±sensor type airbag system is used, in chich the detection of deceleration during a collision
is accomplished by the airbag sensor enclosed in the airbag snesor assembly.
The airbag system is controlled by the airbag sensor assembly. It has a self±diagnosis function. When it detects a
system malfunction, it lights up the SRS warning light on the combination meter to alert the driver.
The basic construction and operation are the same as in teh '96 Avalon. However, 2 types of the inflator for front
passenger have been adopted in the new Camry: TRW made and Morton made. Also, the construction of airbag sensor
assembly has been changed.

System Diagram
The activation processes of the SRS airbag is as illustrated below.

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2. Layout of Components
The major function of the airbag system are shown below.
3. Wiring Diagram

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4. construction and Operation
Inflator and Bag for Front Passenger
1) General
The inflator and ag for front passenger are inserted inside the case, and located in the passenger side instrument panel.
the bag is made of strong nylon cloth, and becomes inflated by the argon gas flowed from the inflator. Also, 2 types
of the inflator for front passenger have been adopted: TRW made and Morton made.
2) Inflator of TRW Made
The inflator of TRW made is comprised of a squib, propellant grain, burst cup and high pressure argon gas.
If the airbag sensor is turned on by deceleration due to frontal collision, electric current then ignites the squib located
in the inflator. the frame of squib spreads instaneously to the propellant grain. If the internal pressure of the burst cup
increases by the combustion of the propellant grain, the burst cup will be released by making its bulkhead break. With
this, the gas which expanded by the tgeat of the ignition of the propellant grain flows into the airbag via the diffuser,
thus inflating the airbag.

Construction

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Operation
3) Inflator of Morton Made
The inflator of Morton made is comprised of a squib, projectile, orifice disk, propellant grain, hight pressure argon
gas and etc.
If the airbag sensor is turned on by deceleration due to frntal collision, electric current then ignites the squib located
in the inflator. The projectile which fired by the ignition of the squib pierces through the orifice disk and collides with
the action piston, which causes the primer to ignite. The flame wo the primer spreads instantaneously to the ignition
booser and to the propellant grain. The gas which expanded by the heat of the ignition of the propellant grain flows
into the airbag via the gas release hole, thus inflating the airbag.

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Construction

Operation