TOYOTA AVENSIS 2002 Repair Manual

Z05953
Spacer
Housing
Female Male
R10587
When Connector is Connected When Connector is Disconnected
Short Spring Plate
Housing
Housing
Terminal
ConnectorsShort Spring PlateSquib
Closed CircuitSquib Short Spring Plate ONContacting Male Terminal Short Spring Plate
60±4
± SUPPLEMENTAL RESTRAINT SYSTEMSUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)No.
ItemApplication
(1)Terminal Twin±Lock MechanismConnectors 2, 4, 6, 8, 10, 12, 13, 14, 15, 19, 21, 22, 25
(2)Activation Prevention MechanismConnectors 2, 4, 16, 18, 20, 22, 24, 26, 28, 30
(3)Electrical Connection Check MechanismConnectors 1, 2, 3, 4
(4)Half Connection Prevention MechanismConnectors 6, 8, 10, 14, 15, 19, 21, 25
(5)Connector Lock MechanismConnectors 17, 23, 27, 29
(a) All connectors for the SRS are colored in yellow to distin-
guish them from other connectors. The connectors hav-
ing special functions and specifically designed for the
SRS are used in the locations shown on the previous
page to ensure high reliability. These connectors use du-
rable gold±plated terminals.
(1) Terminal twin±lock mechanism:
Each connector has a two±piece component con-
sisting of a housing and a spacer. This design en-
ables the terminal to be locked securely by two lock-
ing devices (the retainer and the lance) to prevent
terminals from coming out.
(2) Activation prevention mechanism:
Each connector contains a short spring plate. When
the connector is disconnected, the short spring
plate automatically connects positive (+) terminal
and negative (±) terminal of the squib.

H41646
Disconnection
Detection
Pin
Airbag Sensor Assy Center
H01315
Terminal for Diagnosis
Disconnection Detection Pin
Half Connection
Complete Connection
Terminal for
Diagnosis

H40180
Stopper
Locking PartSpring
Slider
Locking Arm
Rebounded by Slider
(Spring)Stopper
± SUPPLEMENTAL RESTRAINT SYSTEMSUPPLEMENTAL RESTRAINT SYSTEM
60±5
AVENSIS REPAIR MANUAL (RM1018E)
HINT:
The type of connector is shown in the diagram on the previous
page.
(3) Electrical connection check mechanism:
This mechanism electrically checks that the con-
nectors are connected correctly and completely.
The electrical connection check mechanism is de-
signed so that the disconnection detection pin con-
nects with the diagnosis terminals when the con-
nector housing lock is locked.
HINT:
The connectors shown in this illustration are connectors, º1º,
º2º, º3º and º4º in the step 1.
(4) Half connection prevention mechanism:
If the connector is not completely connected, the
connector is disconnected due to the spring opera-
tion to the extent that no continuity exists.

H40181
Claw
Groove
H42905
Fig.1
Fig.2
Power Source
Safing
Sensor
Squibs
Deceleration
Sensor 60±6
± SUPPLEMENTAL RESTRAINT SYSTEMSUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
(5) Connector lock mechanism:
Locking the connector lock button connects the
connector securely.
(b) When the vehicle is involved in a frontal collision in the
hatched area (Fig. 1) and the shock is larger than the pre-
determined level, the SRS is activated automatically. The
safing sensor is designed to go on at a smaller decelera-
tion rate than the airbag sensor. As illustrated in the Fig.
2, ignition is caused when current flows to the squib,
which happens when the safing sensor and the decelera-
tion sensor go on simultaneously. When a deceleration
force acts on the sensors, 3 squibs in the driver airbag,
front passenger airbag and knee airbag ignite and gener-
ate gas. The gas discharging into the driver airbag, front
passenger airbag and knee airbag rapidly increases the
pressure inside the bags, breaking the horn button assy
and instrument panel. The inflation of the bag then ends,
and the bags deflate as the gas is discharged through dis-
charge holes at the bag's rear or side.

H42906
(a)
Yellow PartYellow Part
Mark
(b)
H43151
Yellow Part
± SUPPLEMENTAL RESTRAINT SYSTEMSUPPLEMENTAL RESTRAINT SYSTEM
60±7
AVENSIS REPAIR MANUAL (RM1018E)
2. DISCONNECTION OF CONNECTORS FOR HORN BUTTON ASSY AND CURTAIN SHIELD AIR-
BAG ASSY
HINT:
Tape up the screwdriver tip before use.
(a) Release the yellow part of the connector using a screwdriver.
(b) Insert a screwdriver tip between the connector and the base, and then lever up connector.
3. DISCONNECTION OF CONNECTORS FOR HORN BUTTON ASSY AND CURTAIN SHIELD AIR-
BAG ASSY
(a) Connect the connector.
(b) Push down securely on the yellow part of the connector.

H43007
(a)Black PartMark
(b)
Black Part
H43259
Black Part
60±8
± SUPPLEMENTAL RESTRAINT SYSTEMSUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
4. DISCONNECTION OF CONNECTORS FOR INSTRUMENT PANEL AIRBAG ASSY
HINT:
Tape up the screwdriver tip before use.
(a) Release the black part of the connector using a screwdriver.
(b) Insert a screwdriver tip between the connector and the base, and then lever up connector.
5. DISCONNECTION OF CONNECTORS FOR INSTRUMENT PANEL AIRBAG ASSY
(a) Connect the connector.
(b) Push down securely on the yellow part of the connector.

H01584
SliderSlider
Disconnection is completed
H01585
Slider
Slider
± SUPPLEMENTAL RESTRAINT SYSTEMSUPPLEMENTAL RESTRAINT SYSTEM
60±9
AVENSIS REPAIR MANUAL (RM1018E)
6. DISCONNECTION OF CONNECTOR FRONT SEAT AIRBAG ASSY
(a) Place a finger on the slider.
(b) Slide the slider to release lock.
(c) Disconnect the connector.
7. CONNECTION OF CONNECTOR FOR FRONT SEAT AIRBAG ASSY
(a) Align the lock part of the male connector and the slider of the female connector in the same direction
as shown in the illustration, connect them without rubbing together.
(b) Be sure to insert the connectors until they are locked. After connecting them, pull them slightly to check
that they are locked. (When locking, make sure that the slider returns to its original position and a click
sound can be heard.)
HINT:
When connecting them, the slider slides. Be sure not to touch the slider while connecting, as it may result
in an insecure fit.

H02763
Outer
H02764
Connector lock is released
Disconnection is completed
H02768
Outer
Outer
Connection is completed 60±10
± SUPPLEMENTAL RESTRAINT SYSTEMSUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
8. DISCONNECTION OF AIRBAG FRONT SENSOR, SIDE
AIRBAG SENSOR AND AIRBAG SENSOR REAR CON-
NECTOR
(a) While holding both outer flank sides of the outer, slide the
outer to the direction shown by the arrow.
(b) When the connector lock is released, the connectors are
disconnected.
HINT:
Be sure to hold both outer flank sides. If the top and bottom
sides are held, it will obstruct disconnection.
9. CONNECTION OF CONNECTORS FOR AIRBAG FRONT SENSOR, SIDE AIRBAG SENSOR AND
AIRBAG SENSOR REAR
(a) Align the male connector (on the side of sensor) and female connector in the same direction as shown
in the illustration and connect them without rubbing together.
(b) Be sure to insert the connectors until they are locked. After connecting them, pull them slightly to check
that they are locked. (When locking, make sure that the outer returns to its original position and a click
sound can be heard.)
HINT:
When connecting them, the outer slides. Be sure not to hold the outer while connecting, as it may result in
an insecure fit.

600JV±01
H42615
H42616
H43001
Horn Button Contact Plate
H42618
±
SUPPLEMENTAL RESTRAINT SYSTEM SUPPLEMENTAL RESTRAINT SYSTEM
60±11
AVENSIS REPAIR MANUAL (RM1018E)
ON±VEHICLE INSPECTION
1. HORN BUTTON ASSY (VEHICLES NOT INVOLVED IN
COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check which includes the following items with the horn button assy installed in the vehicle:
Cuts, minute cracks or marked discoloration on the horn
button assy top surface and in the grooved portion.
2. HORN BUTTON ASSY (VEHICLE INVOLVED IN COLLI- SION AND AIRBAG IS NOT DEPLOYED)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check of the horn button assy removed from the vehicle:

Cuts, minute cracks or marked discoloration on the
horn button assy top surface and in the grooved
portion.

Cuts and cracks in wire harness, and chipping in
connectors.

Deformation of the horn button assy.

The deformation of the horn button contact plate of
the steering wheel assy.
HINT:

If the horn button contact plate of the steering wheel assy
is deformed, replace it with a new one. Always replace the
steering wheel assy with a new one.

Never repair it in order for reuse or replacement.

There should be no interference between the horn button
assy and steering wheel assy, and the clearance should
be uniform all the way around when the new horn button
assy is installed on the steering wheel assy.
CAUTION:
For removal and installation procedures of the horn button
assy, see ºReplacementº on page 60±17, and be sure to fol-
low the correct procedure.

H42619
H42620
H42621
60±12
±
SUPPLEMENTAL RESTRAINT SYSTEM SUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
3. INSTRUMENT PANEL PASSENGER AIRBAG ASSY (VEHICLE NOT INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check which includes the following items with
the instrument panel passenger airbag assy installed in
the vehicle:
Cuts, minute cracks or marked discoloration on the instru-
ment panel around the instrument panel passenger air-
bag assy.
4. INSTRUMENT PANEL PASSENGER AIRBAG ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS
NOT DEPLOYED)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check of the instrument panel passenger air- bag assy removed from the vehicle:

Cuts, minute cracks or marked discoloration on the
instrument panel passenger airbag assy.

Cuts and cracks in wire harness, and chipping in
connectors.

Deformation or cracks on the instrument panel and
instrument panel reinforcement.
HINT:

If the instrument panel or instrument panel reinforcement
is deformed or cracked, never repair it. Always replace it
with a new one.

Never repair it in order for reuse.
CAUTION:
For removal and installation of procedures the instrument
panel passenger airbag assy, see ºReplacementº on page
60±29, and be sure to follow the correct procedure.

H42654
H41401
H42655
H42759
H42656
±
SUPPLEMENTAL RESTRAINT SYSTEM SUPPLEMENTAL RESTRAINT SYSTEM
60±13
AVENSIS REPAIR MANUAL (RM1018E)
5. FRONT SEAT AIRBAG ASSY (VEHICLE NOT IN-
VOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check which includes the following items with
the front seat airbag assy installed in the vehicle:
Cuts, minute cracks or marked discoloration on the front
seat back assy around the front seat airbag assy.
6. FRONT SEAT AIRBAG ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check which includes the following items with the front seat airbag assy removed from the vehicle:

Cuts, minute cracks or marked discoloration on the
front seat airbag assy.

Cuts and cracks in wire harness, and chipping in
connectors.
7. CURTAIN SHIELD AIRBAG ASSY (VEHICLE NOT IN- VOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check of the curtain shield airbag assy installed in the vehicle:
Cuts, minute cracks or marked discoloration on the front
pillar garnish and roof headlining assy around the curtain
shield airbag assy.
8. CURTAIN SHIELD AIRBAG ASSY (VEHICLE IN- VOLVED IN COLLISION AND AIRBAG IS NOT
DEPLOYED)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check which includes the following items with
the curtain shield airbag assy removed from the vehicle:

Cuts, minute cracks or marked discoloration on the
curtain shield airbag assy.

Cuts and cracks in wire harness, and chipping in the
connectors.
9. INSTRUMENT PANEL AIRBAG ASSY (VEHICLE IN- VOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check of the instrument panel airbag assy
installed in the vehicle:
Cuts, minute cracks of marked discoloration on the instru-
ment panel airbag assy.