Page 3292 of 4323

RS0B6±09
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±1
3284 Author: Date:
2005 SEQUOIA (RM1146U)
SRS AIRBAG
PRECAUTION
CAUTION:
The vehicle is equipped with SRS, which consists of a driver airbag, front passenger airbag,
side airbag and curtain shield airbag. Failure to carry out service operations in the correct se-
quence could cause the SRS to unexpectedly deploy during servicing, possibly leading to a
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 (including removal or installa-
tion of parts, inspection or replacement), be sure to read the following items carefully, then fol-
low the correct procedures indicated in the repair manual.
Wait at least 90 seconds after the ignition switch is turned to the ºLOCKº position and the nega-
tive (±) terminal cable is disconnected from the battery.
(The SRS is equipped with a back±up power source, so that if work is started within 90 seconds
after disconnecting the negative (±) terminal cable of the battery, the SRS may be deployed.)
Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly,
curtain shield airbag assembly, airbag sensor assembly, front airbag sensor, side airbag sen-
sor assembly, curtain shield airbag sensor assembly, seat position sensor assembly or occu-
pant classification ECU directly to hot air or flames.
Be sure to perform the initialization of the occupant classification ECU if any of the following
conditions occur (see page DI±1128). If the initialization is not performed, the SRS may not oper-
ate properly.
The occupant classification ECU is replaced.
Accessories (seatback tray, seat cover, etc.) are installed to the vehicle.
The passenger seat is removed from the vehicle, and then reinstalled or replaced.
The passenger airbag ON/OFF indicator light (ºOFFº) comes on when the passenger seat
is not occupied.
The vehicle is brought to the workshop for repair due to an accident or collision.
NOTICE:
Malfunction symptoms of the SRS are difficult to confirm, so DTCs are the most important
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 steering wheel pad,
front passenger airbag assembly, side airbag assembly, curtain shield airbag assembly, airbag
sensor assembly, front airbag sensor, side airbag sensor assembly, curtain shield airbag sen-
sor assembly, seat position sensor assembly and occupant classification ECU should be in-
spected. (see page RS±22, RS±35, RS±49, RS±64, RS±72, RS±83, RS±88, RS±93, RS±98,
RS±106 and RS±112).
Before repair work, remove the airbag sensor if any kind of shock is likely to occur to the airbag
sensor during the operation.
Never use SRS parts from another vehicle. When replacing the parts, replace them with new
ones.
Never disassemble or repair the steering wheel pad, front passenger airbag assembly, side air-
bag assembly, curtain shield airbag assembly, airbag sensor assembly, front airbag sensor,
side airbag sensor assembly, curtain shield airbag sensor assembly, seat position sensor as-
sembly or occupant classification ECU in order to reuse it.
Page 3294 of 4323

RS116±01
H24695
H23918Spiral Cable
H16182
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±3
3286 Author: Date:
2005 SEQUOIA (RM1146U)
OPERATION
CAUTION:
Be sure to perform the initialization of the occupant classi-
fication ECU if any of the following conditions occur (see
page DI±1128). If the initialization is not performed, the SRS
may not operate properly.
The occupant classification ECU is replaced.
Accessories (seatback tray, seat cover, etc.) are
installed to the vehicle.
The passenger seat is removed from the vehicle, and
then reinstalled or replaced.
The passenger airbag ON/OFF indicator light (ºOFFº)
comes on when the passenger seat is not occupied.
The vehicle is brought to the workshop for repair due
to an accident or collision.
1. STEERING WHEEL PAD
The inflator and bag of the SRS are stored in the steering wheel
pad and cannot be disassembled. The inflator contains a squib,
igniter charge, and gas generator, etc., and inflates the bag
when instructed by the airbag sensor assembly. The steering
wheel pad cannot be disassembled.
2. SPIRAL CABLE
A spiral cable is used as an electrical joint from the vehicle body
side to the steering wheel. The spiral cable cannot be disas-
sembled.
3. FRONT PASSENGER AIRBAG ASSEMBLY
The inflator and bag of the SRS are stored in the front passen-
ger airbag assembly and cannot be disassembled. The inflator
contains a squib, igniter charge, gas generator, etc., and in-
flates the bag when instructed by the airbag sensor assembly.
The front passenger airbag assembly cannot be disassembled.
Page 3295 of 4323

H17489
H23919
H16185
H23920
H16187
RS±4
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
3287 Author: Date:
2005 SEQUOIA (RM1146U)
4. SIDE AIRBAG ASSEMBLY
The inflator and bag of the SRS are stored in the side airbag as-
sembly and cannot be disassembled. The inflator contains a
squib, igniter charge and gas generator, etc., and inflates the
bag when instructed by the airbag sensor assembly. The side
airbag assembly cannot be disassembled.
5. CURTAIN SHIELD AIRBAG ASSEMBLY
The inflator and bag of the SRS are stored in the curtain shield
airbag assembly and cannot be disassembled. The inflator con-
tains a squib, igniter charge, gas generator, etc., and inflates
the bag when instructed by the airbag sensor assembly. The
curtain shield airbag assembly cannot be disassembled.
6. SEAT BELT PRETENSIONER
The front seat outer belt has the seat belt pretensioner system.
The pretensioner operates in the event of a frontal collision. The
seat belt pretensioner cannot be disassembled.
7. SRS WARNING LIGHT
The SRS warning light is located on the combination meter. It
comes on to alert the driver of trouble in the system when a mal-
function is detected in the airbag sensor assembly. In normal
operation conditions when the ignition switch is turned to the
ON position, the light comes on for approximately 6 seconds
and then goes off.
8. AIRBAG SENSOR ASSEMBLY
The airbag sensor assembly is mounted on the floor inside the
lower center finish panel. The airbag sensor assembly consists
of an airbag sensor, safing sensor, diagnosis circuit, ignition
control, drive circuit, etc. It receives signals from the airbag sen-
sor, front airbag sensor, side and curtain shield airbag sensor
and curtain shield airbag sensor, and judges whether the SRS
must be activated or not. The airbag sensor assembly cannot
be disassembled.
Page 3297 of 4323
H23941
RS±6
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
3289 Author: Date:
2005 SEQUOIA (RM1146U)
14. RSCA OFF SWITCH
The RSCA OFF switch is located on the switch base. The cur-
tain shield airbag can be switched ON and OFF by pushing the
RCSA OFF switch. Also, the RCSA OFF indicator lamp comes
on to inform the passenger that the curtain shield airbag is dis-
abled.
Switch PositionCurtain Shield AirbagIndicator Light
ONOperativeOFF
OFFDisabledON
Page 3298 of 4323

H23944
Side Airbag
Sensor Assembly RH (*1)
Airbag Sensor
AssemblyFront Seat Outer
Belt Assembly RH
Front Seat Airbag
Assembly RH (Squib) (*1) 14 13
Front Airbag Sensor
LH
Side Airbag
Sensor Assembly LH (*1)
Seat Position
Airbag SensorFront Seat Airbag
Assembly LH (Squib)
Curtain Shield Airbag
Assembly LH (Squib) (*1) Front Airbag Sensor
RHFront Passenger
Airbag Assembly (Squib)
Front Seat Outer
Belt Assembly LH (*1)
Spiral Cable
Curtain Shield Airbag
Assembly RH (Squib) (*1)
10 9
8 7
6 5
4 3
2 1
4 3
6 5
8 7
10 9
12 1116 15
18 17
18 17
20 1922 2132 31
30 29
28 27
26 25
34 33
36 35
28 27
30 29
32 3124 23 Occupant
Classification ECU
Curtain Shield Airbag
Sensor Assembly RH (*1)
Curtain Shield Airbag
Sensor Assembly LH (*1)Steering Wheel
Pad (Squib) RCSA OFF Switch (*1) RCSA OFF Switch
(Light) (*1)
(*1) w/ Side Airbag and Curtain Shield Airbag
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±7
3290 Author: Date:
2005 SEQUOIA (RM1146U)
15. SRS CONNECTORS
HINT:
SRS connectors are located as shown in the following illustration.
No.Connector TypeApplication
(1)Terminal Twin±Lock MechanismConnectors 2, 4, 6, 8, 10, 18, 21, 25, 26, 27, 28
(2)Activation Prevention MechanismConnectors 2, 4, 22, 24, 26, 28, 30, 32
(3)Half Connection Prevention MechanismConnectors 6, 8, 10, 17, 21, 25, 27
(4)Connector Lock Mechanism (1)Connectors 23, 29, 31
(5)Connector Lock Mechanism (2)Connectors 2, 4
(6)Improper Connection Prevention Lock MechanismConnectors 1, 3
Page 3367 of 4323

H23926
AB0163
Wire Harness
Diameter
Stripped Wire Harness Section
H23927
Width
Inner
Diameter RS±76
± SUPPLEMENTAL RESTRAINT SYSTEMCURTAIN SHIELD AIRBAG ASSEMBLY
3359 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Cut off the deployment section of the curtain shield airbag
assembly.
(d) Using a service±purpose wire harness for the vehicle, tie
down the front passenger airbag assembly to the tire.
Wire harness: Stripped wire harness section
1.25 mm
2
or more (0.0019 in2. or more)
CAUTION:
If the wire harness is too thin or an alternative object is
used to tie down the curtain shield airbag assembly, it may
be snapped by the shock when the airbag is deployed. Al-
ways use a wire harness for vehicle use with an area of at
least 1.25 mm
2 (0.0019 in2.).
HINT:
To calculate the area of the stripped wire harness section:
Area = 3.14 x (Diameter)
2 divided by 4
(1) Position the curtain shield airbag assembly inside
the tire with the airbag deployment side facing in-
side.
Tire size: Must exceed the following dimensions:
Width: 185 mm (7.28 in.)
Inner diameter: 360 mm (14.17 in.)
CAUTION:
Make sure that the wire harness is tight. If there is
slack in wire harness, the curtain shield airbag as-
sembly may become loose due to the shock when the
airbag is deployed.
Always tie down the curtain shield airbag assembly
with the airbag deployment side facing inside.
NOTICE:
The tire will be marked by the airbag deployment, so use an
extra tire.
Page 3407 of 4323
H23940Claw
RS11V±01
RS±116
± SUPPLEMENTAL RESTRAINT SYSTEMRSCA OFF SWITCH
3399 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. PRECAUTION (SEE PAGE RS±1 and RS±3)
2. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
Wait for 90 seconds after disconnecting the cable to prevent the
airbag working.
3. REMOVE LOWER FINISH PANEL (SEE PAGE
BO±89)
4. REMOVE SWITCH BASE
(a) Using a screwdriver, release the 3 claws and remover the
switch base.
HINT:
Tape up the screwdriver tip before use.
(b) Disconnect the connectors.
Page 3410 of 4323
RS0BU±10
H23906
Front Airbag Sensor (LH)Front Airbag
Sensor (RH)Front Passenger
Airbag Assembly (RH)
Seat Belt
Pretensioner (RH)
Airbag Sensor Assembly Seat Belt Pretensioner (LH) Spiral CableCurtain Shield
Airbag Assembly (RH)
Side Airbag
Assembly (RH) (*1)
Side Airbag Sensor
Assembly (RH) (*1)
Side Airbag Assembly (LH) (*1) Side Airbag Sensor
Assembly (LH) (*1)
Curtain Shield Airbag
Assembly (LH) (*1)
Combination Meter
(Warning Light)
Steering Wheel Pad
(With Airbag)
Curtain Shield Airbag
Sensor Assembly (LH) (*1)
Curtain Shield Airbag
Sensor Assembly
(RH) (*1)RSCA OFF
Switch (*1)
Occupant Classification
ECU (*1)
(*1) w/ Side Airbag and Curtain Shield Airbag
± SUPPLEMENTAL RESTRAINT SYSTEMWIRE HARNESS AND CONNECTOR
RS±119
3402 Author: Date:
2005 SEQUOIA (RM1146U)
WIRE HARNESS AND CONNECTOR
LOCATION