2001 TOYOTA SEQUOIA terminal TC

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.

RS±2
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
3285 Author: Date:
2005 SEQUOIA (RM1146U)

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, curtain
shield airbag assembly, airbag sensor assembly, front airbag sensor, side airbag sensor as-
sembly, curtain shield airbag sensor assembly, seat position sensor assembly or occupant
classification ECU 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 kW/V minimum) for troubleshooting the electrical
circuits.

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

After work on the SRS is completed, perform the SRS warning light check (see page DI±1137).

When the negative (±) terminal cable is disconnected from the battery, the memory will be
cleared. Because of this, be sure to make a record of the contents memorized in each system
before starting work. When work is finished, adjust each system as it was before. Never use
a back±up power supply from outside the vehicle to avoid erasing the memory in any system.

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

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
RS±8
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
3291 Author: Date:
2005 SEQUOIA (RM1146U)
(a) All connectors in the SRS, except the seat position airbag
sensor connector and occupant classification ECU con-
nectors, are colored yellow to distinguish them from other
connectors. These connectors have special functions,
and are specially designed for the SRS. All SRS connec-
tors use durable gold±plated terminals, and are placed in
the locations shown on the previous page to ensure high
reliability.
(1) Terminal Twin±Lock Mechanism
Each connector has a two±piece component con-
sisting of a housing and a spacer. This design al-
lows 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 the positive (+) termi-
nal and negative (±) terminal of the squib.

RS0B9±13
± SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
RS±21
3304 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
NOTICE:

If the wiring connector of the SRS is disconnected and the ignition switch is in the ON or ACC
position, DTCs will be recorded.

Never use airbag parts from another vehicle. When replacing parts, replace them with new
ones.
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 STEERING WHEEL PAD (SEE PAGE SR±14)
4. REMOVE STEERING WHEEL (SEE PAGE SR±14)
5. REMOVE STEERING COLUMN COVER LOWER (SEE PAGE SR±14)
6. REMOVE SPIRAL CABLE (SEE PAGE SR±14)

AB0158
SSTBattery
H01580
SST
H23202
H20645H23684SST
RS±24
± SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
3307 Author: Date:
2005 SEQUOIA (RM1146U)
(1) Connect the SST to the battery.
Connect the red clip of the SST to the battery posi-
tive (+) terminal and the black clip to the battery neg-
ative (±) terminal.
(2) Check the function of the SST.
Press the SST activation switch, and check that the
LED of the SST activation switch comes on.
CAUTION:

Do not connect the SST connector (yellow colored
one) to the airbag.

If the LED comes on when the activation switch is not
being pressed, SST malfunction is possible, so re-
place the SST with a new one.
(3) Disconnect the SST from the battery.
(b) Precaution (see page RS±1 and RS±3).
(c) Disconnect the cable from the negative battery terminal.
Wait for 90 seconds after disconnecting the cable to prevent the
airbag working.
(d) Remove the steering column cover lower.
(1) While turning the steering wheel assembly to the
right and left, remove the 3 screws and steering col-
umn cover lower.
(e) Install the SST.
CAUTION:
Check that there is no looseness in the steering wheel as-
sembly and steering wheel pad.
(1) Disconnect the airbag connector (yellow colored
one) from the spiral cable.
NOTICE:
When handling the airbag connector, take care not to dam-
age the airbag wire harness.

R13455
10 m (33 ft) or more
SSTBattery
± SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
RS±25
3308 Author: Date:
2005 SEQUOIA (RM1146U)
(2) Connect the SST connector to the airbag connector
of the spiral cable.
SST 09082±00700, 09082±00780
NOTICE:
To avoid damaging the SST connector and wire harness,
do not lock the secondary lock of the twin lock.
(3) Move the SST at least 10 m (33 ft) away from the ve-
hicle front side window.
(4) Maintaining enough clearance for the SST wire har-
ness in the front side window, close all doors and
windows of the vehicle.
NOTICE:
Take care not to damage the SST wire harness.
(5) Connect the red clip of the SST to the battery posi-
tive (+) terminal and the black clip of the SST to the
negative (±) terminal.
(f) Deploy the airbag.
(1) Check that no one is inside the vehicle or within a
10 m (33 ft) radius of the vehicle.
(2) Press the SST activation switch and deploy the air-
bag.
CAUTION:

When deploying the airbag, make sure that no one is
near the vehicle.

The steering wheel pad becomes extremely hot when
the airbag is deployed, so do not touch it for at least
30 minutes after deployment.

Use gloves and safety glasses when handling a steer-
ing wheel pad with a deployed airbag.

Do not apply water, etc. to a steering wheel pad with
a deployed airbag.

Always wash your hands with water after completing
the operation.
2. DEPLOYMENT WHEN DISPOSING OF STEERING
WHEEL PAD ONLY
NOTICE:

When disposing of the steering wheel pad, never use
the customer's vehicle to deploy the airbag.

Be sure to follow the procedure given below when de-
ploying the airbag.
HINT:
Prepare a battery as the power source to deploy the airbag.

AB0152
SST
AB0163
Wire Harness
Diameter
Stripped Wire Harness Section
H23203
L
M
H23207
SST
RS±26
± SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
3309 Author: Date:
2005 SEQUOIA (RM1146U)
(a) Check the function of the SST (see step 1±(a)).
(b) Remove the steering wheel pad (see page SR±14).
CAUTION:

When removing the steering wheel pad, work must be
started 90 seconds after the ignition switch is turned
to the ºLOCKº position and the negative (±) terminal
cable is disconnected from the battery.

When storing the steering wheel pad, keep the airbag
deployment side facing upward.
(c) Using a service±purpose wire harness for the vehicle, tie
down the steering wheel pad to the disc wheel.
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 steering wheel pad, it may be snapped
by the shock when the airbag is deployed. Always use a
wire harness for vehicle use with an area of at least 1.25
mm
2
(0.0019 in.2).
HINT:
To calculate the area of the stripped wire harness section:
Area = 3.14 x (Diameter)
2
divided by 4
(1) Install the 2 bolts with washers into the 2 bolt holes
on the steering wheel pad.
Bolt:
L: 35.0 mm (1.378 in.)
M: 6.0 mm (0.236 in.)
Pitch: 1.0 mm (0.039 in.)
NOTICE:

Tighten the bolts by hand until the bolts become diffi-
cult to turn.

Do not tighten the bolts excessively.
(2) After connecting the SST below to each other, con-
nect them to the steering wheel pad connectors.
SST 09082±00802 (09082±10801, 09082±30801)