sensor TOYOTA AVENSIS 2002 Repair Manual

600AB±04
H42640
60±70
±
SUPPLEMENTAL RESTRAINT SYSTEM SEAT POSITION AIR BAG SENSOR
AVENSIS REPAIR MANUAL (RM1018E)
REPLACEMENT
HINT:
Replacement procedure of the RH side is the same as that of the LH side.
1.PRECAUTION (See page 60±1)
2.DISCONNECT BATTERY NEGATIVE TERMINAL (See page 60±1)
3.REMOVE SEAT TRACK COVER LH (See page 72±16)
4.REMOVE SEAT TRACK BRACKET COVER INNER LH (See page 72±16)
5.REMOVE FRONT SEAT ASSY LH (See page 72±16) 6. REMOVE SEAT POSITION AIR BAG SENSOR
(a) Disconnect the connector of the seat position airbag sen-sor.
(b) Using a torx socket wrench (T30), remove the torx screw and seat position airbag sensor.
7. INSTALL SEAT POSITION AIR BAG SENSOR
(a) Check that the ignition switch is off.
(b) Check that the battery negative (±) terminal is disconnected.
NOTICE:
Do not start the operation for 90 seconds after removing the terminal.
(c) Using a torx socket wrench (T30), install the seat position airbag sen\
sor with the torx screw. Torque: 8.0 N
m (82 kgf
cm, 71 in.
lbf)
NOTICE:

If the seat position airbag sensor has been dropped, or there are any cracks, dents or other de-
fects in the case, bracket or connector, replace the seat position airbag sensor with a new one.

When installing the seat position airbag sensor, take care that the SRS wiring does not interfere
with other parts and is not pinched between other parts.
(d) Connect the connector of the seat position airbag sensor.
(e) Check that no play is identified.
8.INSTALL FRONT SEAT ASSY LH (See page 72±16)
Torque: 37 N
m (375 kgf
cm, 27 ft
lbf)
9.SRS WARNING LIGHT (See page 05±1184)

600A6±03
H42766N
m (kgf
cm, ft
lbf) : Specified torque Rear Door Opening
Trim Weatherstrip LH
Rear Door Scuff
Plate LH
Center Pillar
Garnish Lower LH
Front Door Scuff
Plate LHFront Door Opening Trim
Weatherstrip LHFront Seat
Outer Belt Assy LH
8.0 (82, 70 in.
lbf)
Side Airbag Sensor Assy LH
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIR BAG SENSOR ASSY LH
60±65
AVENSIS REPAIR MANUAL (RM1018E)
SIDE AIR BAG SENSOR ASSY LH
COMPONENTS

600A7±03
H42767
60±66
±
SUPPLEMENTAL RESTRAINT SYSTEM SIDE AIR BAG SENSOR ASSY LH
AVENSIS REPAIR MANUAL (RM1018E)
REPLACEMENT
HINT:
Replacement procedure of the RH side is the same as that for with LH side.
1.PRECAUTION (See page 60±1)
2.DISCONNECT BATTERY NEGATIVE TERMINAL (See page 60±1)
3.REMOVE FRONT DOOR SCUFF PLATE LH (See page 76±36)
4.REMOVE REAR DOOR SCUFF PLATE LH (See page 76±36)
5.REMOVE FRONT DOOR WEATHERSTRIP LH (See page 76±36)
6.REMOVE REAR DOOR WEATHERSTRIP LH (See page 76±36)
7.REMOVE CENTER PILLAR GARNISH LOWER LH (See page 76±36)
8.REMOVE FRONT SEAT OUTER BELT ASSY LH (See page 61±7) 9. REMOVE SIDE AIR BAG SENSOR ASSY LH
(a) Remove the bolt and the side airbag sensor assy LH.
(b) Disconnect the connector from the side airbag sensorassy LH.
10. INSTALL SIDE AIR BAG SENSOR ASSY LH
(a) Check that the ignition switch is off.
(b) Check that the battery negative (±) terminal is disconnected.
NOTICE:
Do not start the operation for 90 seconds after removing the terminal.
(c) Install the side airbag sensor assy LH with the nut. Torque: 8.0 N
m (82 kgf
cm, 70 in.
lbf)
NOTICE:

If the side airbag sensor assy LH has been dropped, or there are any cra\
cks, dents or other de-
fects in the case, bracket or connector, replace the side airbag sensor assy LH with a new one.

When installing the side airbag sensor assy LH, take care that the SRS wiring\
does not interfere
with other parts and is not pinched between other parts.
(d) Connect the connector of the side airbag sensor assy LH.
(e) Check that no play is identified.
11.INSTALL FRONT SEAT OUTER BELT ASSY LH (See page 61±7)
12.INSPECT SRS WARNING LIGHT (See page 05±1184)

600JU±01
±
SUPPLEMENTAL RESTRAINT SYSTEM SUPPLEMENTAL RESTRAINT SYSTEM
60±1
AVENSIS REPAIR MANUAL (RM1018E)
SUPPLEMENTAL RESTRAINT SYSTEM
PRECAUTION
CAUTION:

AVENSIS is equipped with SRS, which comprises of a driver airbag, front passeng\
er airbag,
side airbag, curtain shield airbag and driver knee airbag. Failure to carry \
out service operations
in the correct sequence could cause the SRS to unexpectedly deploy during \
servicing, possibly
leading to serious accident. Further, if a mistake is made in servicing the SRS, it is possible that
the SRS may fail to operate when required. Before performing servicing (in\
cluding removal or
installation of parts, inspection or replacement), be sure to read the \
following items carefully,
then follow the correct procedures indicated in the repair manual.

Work must be started 90 seconds after the ignition switch is turned to the º\
LOCKº position and
the negative (±) terminal cable is disconnected from the battery.
(The SRS is equipped with a back±up power source so that if work is started wi\
thin 90 seconds
after disconnecting the negative (±) terminal cable of the battery, the SRS may be deployed.)

Do not expose the horn button assy, instrument panel passenger airbag assy, instrument panel
airbag assy, airbag sensor assy center, airbag front sensor, front seat airbag assy, side airbag
sensor assy, curtain shield airbag assy, airbag sensor rear or seat position airbag sensor di-
rectly to hot air or flames.
NOTICE:

Malfunction symptoms of the SRS are difficult to confirm, so DTCs are th\
e most important in-
formation source of information when troubleshooting. When troubleshooting the SRS, always
inspect DTCs before disconnecting the battery.

Even in the case of a minor collision when the SRS does not deploy, the horn button assy, instru-
ment panel passenger airbag assy, instrument panel airbag assy, airbag sensor assy center,
airbag front sensor, front seat airbag assy, side airbag sensor assy, curtain shield airbag assy,
airbag sensor rear and seat position sensor must be inspected (See page 60±11).

Before repairs work, remove the airbag sensor if any kind of shock is likely to occur to the sen-
sor during operation.

Never use SRS parts from another vehicle. When replacing the parts, repl\
ace them with new
ones.

Never disassemble nor repair the horn button assy, instrument panel passenger airbag assy,
instrument panel airbag assy, airbag sensor assy center, airbag front sensor, front seat airbag
assy, side airbag sensor assy, curtain shield airbag assy, airbag sensor rear or seat position
airbag sensor in order to reuse it.

If the horn button assy, instrument panel passenger airbag assy, instrument panel airbag assy,
airbag sensor assy center, airbag front sensor, front seat airbag assy, side airbag sensor assy,
curtain shield airbag assy, airbag sensor rear or seat position airbag sensor has been dropped,
or if there are any cracks, dents or other defects in the case, bracket \
or connector, replace it
with a new one.

Use a volt/ohmmeter with high impedance (10 k
/V minimum) for troubleshooting the electrical
circuits circuits.

Information labels are attached to the periphery of the SRS components. Follow the instruc-
tions the notice.

After work on the SRS is completed, perform the SRS warning light check \
(See page 05±1184).

H42671
Side Airbag
Sensor Assy RH
Airbag Front
RH Sensor
Airbag Sensor
Assy Center
Airbag Sensor
Front LH
Side Airbag
Sensor Assy LH
Airbag Sensor
Rear LH (*1)
Seat Position
Airbag Sensor
(*2)Horn Button Assy
(Squib) Instrument Panel
Passenger Airbag
Assy (Squib)Front Seat Outer
Belt Assy RH
(Squib)
Front Seat
Airbag Assy RH
(Squib)
Front Seat
Airbag Assy
LH (Squib)
Curtain Shield
Airbag Assy LH
(Squib) (*1) Airbag Sensor
Rear RH (*1)Curtain Shield
Airbag Assy RH
(Squib) (*1)
Front Seat Outer
Belt Assy LH
(Squib) Seat Position
Airbag Sensor
(*3)
Instrument Panel
Airbag Assy (Squib)
Spiral Cable
Sub±assy 7
15 8
16
513
614 3 11
412
19
210
23
24 2129
2230
1927
2028
17 25
1826
34 5
6
78
11
12 9
1025
26
27
28
29
30
*1: w/ Curtain Shield Airbag
*2: LHD
*3: RHD
*4: Knee Airbag
± SUPPLEMENTAL RESTRAINT SYSTEMSUPPLEMENTAL RESTRAINT SYSTEM
60±3
AVENSIS REPAIR MANUAL (RM1018E)
1. SRS CONNECTORS

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.

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.

H42657
H42659
60±14
±
SUPPLEMENTAL RESTRAINT SYSTEM SUPPLEMENTAL RESTRAINT SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
10. INSTRUMENT PANEL 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 of the instrument panel airbag assy re- moved from the vehicle:

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

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 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±54, and be sure to fol-
low the correct procedure.
11. AIRBAG SENSOR ASSY CENTER (VEHICLE NOT INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
12. AIRBAG SENSOR ASSY CENTER (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED)
(a)Do a diagnostic system check (See page 05±1184).
13. AIRBAG SENSOR ASSY CENTER (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS
DEPLOYED)
(a)Replace the airbag sensor assy center (See page 60±62).
14. AIRBAG FRONT SENSOR (VEHICLE NOT INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
15. AIRBAG FRONT SENSOR (VEHICLE INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
(b) When the headlamp of the vehicle or its periphery is damaged, check if t\
here is any damage to the airbag front sensor. If there are any defects as mentioned below, replace the airbag front sensor with
a new one:
If there are any defects as mentioned below, replace the airbag front sensor with a new one:

Cracks, dents or chips in the case.

Cracks, dents, chips and scratches in the connector.

Peeling off of the label or damage to the serial number.
16. AIRBAG FRONT SENSOR (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS DEPLOYED)
(a)Replace the airbag front sensor assy (See page 60±64).
17. SIDE AIRBAG SENSOR ASSY (VEHICLES NOT INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).

±
SUPPLEMENTAL RESTRAINT SYSTEM SUPPLEMENTAL RESTRAINT SYSTEM
60±15
AVENSIS REPAIR MANUAL (RM1018E)
18. SIDE AIRBAG SENSOR ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT
DEPLOYED)
(a)Do a diagnostic system check (See page 05±1184).
(b) When the center pillar of the vehicle or its periphery is damaged, check if \
there is any damage to the
side airbag sensor. If there are any defects as mentioned below, replace the side airbag sensor with
a new one:
If there are any defects as mentioned below, replace the side airbag sensor with a new one:

Cracks, dents or chips in the case.

Cracks, dents, chips and scratches in the connector.

Peeling off of the label or damage to the serial number.
19. SIDE AIRBAG SENSOR ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS DEPLOYED)
(a)Replace the front seat airbag assy and side airbag sensor assy (See page 60±66).
20. AIRBAG SENSOR REAR (VEHICLE NOT INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
21. AIRBAG SENSOR REAR (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED)
(a)Do a diagnostic system check (See page 05±1184).
(b) When the quarter panel of the vehicle or its periphery is damaged, check if \
there is any damage to the airbag sensor rear. If there are any defects as mentioned below, replace the airbag sensor rear with
a new one:
If there are any defects as mentioned below, replace the airbag sensor rear with a new one:

Cracks, dents or chips in the case.

Cracks, dents, chips and scratches in the connector.

Peeling off of the label or damage to the serial number.
22. AIRBAG SENSOR REAR (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS DEPLOYED)
(a)Replace the curtain shield airbag assy and airbag sensor rear (See page 60±68).
23. SEAT POSITION AIRBAG SENSOR (VEHICLES NOT INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
24. SEAT POSITION AIRBAG SENSOR (VEHICLE INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
(b) Do a visual check for damage to the seat position airbag sensor even if th\
e airbag was not deployed:

Cracks, dents or chips in the case.

Cracks, dents, chips and scratches in the connector.
25. WIRE HARNESS AND CONNECTOR (VEHICLE NOT INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
26. WIRE HARNESS AND CONNECTOR (VEHICLE INVOLVED IN COLLISION)
(a)Do a diagnostic system check (See page 05±1184).
(b) Check for breaks in all wires of the SRS wire harness, and exposed condu\
ctors.
(c) Check to see if the SRS wire harness connectors are cracked or chipped.
HINT:
The SRS wire harness is integrated with the engine room main wire, instrume\
nt panel wire floor wire, floor
wire No.2 harness assembly.