LEXUS GS400 2000 Service Repair Manual

RS07I±01
H02591
H02590
H04226
RS±38
± SUPPLEMENTAL RESTRAINT SYSTEMFRONT PASSENGER AIRBAG ASSEMBLY
2269 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
NOTICE:
Never use airbag parts from another vehicle. When replac-
ing parts, replace with new parts.
1. INSTALL FRONT PASSENGER AIRBAG ASSEMBLY
(a) Install the front passenger airbag assembly with 2 nuts.
Torque: 5.6 N´m ( 57 kgf´cm, 49 in.´lbf)
NOTICE:

Pass the straps of the front passenger airbag door
through the brackets on the right and left sides se-
curely.

Install the straps so that they are not pinched be-
tween the airbag and instrument panel.
(b) Install the 2 straps and 2 bolts.
NOTICE:

When installing the front passenger airbag assembly,
make sure that the straps are not distorted and
installed to the brackets securely.

Make sure that the front passenger airbag assembly
is installed to the specified torque.

If the front passenger airbag assembly has been
dropped, or there are cracks, dents or other defects
in the case or connector, replace the front passenger
airbag assembly with a new one.

When installing the front passenger airbag assembly,
take care that the wiring does not interfere with other
parts and is not pinched between other parts.
2. INSTALL INSTRUMENT PANEL
(See page BO±97)
Install the 2 bolts to the instrument panel reinforcement.
Torque: 20 N´m (205 kgf´cm, 15 ft´lbf)
3. CONNECT AIRBAG CONNECTOR
(a) Connect the airbag connector.
(b) Install the airbag connector to glove compartment door
finish plate.
(c) Install the glove compartment door finish plate.

RS07J±02
H11866
Seatback CoverFront Seatback Board
Seat Cushion Assembly
Seat Adjuster
Front Seat Inner
Cushion Cover
Seat Track CoverSeat Track Cover
Reclining Adjuster
Inside Cover LH
Front Seat Cushion ShieldFront Seat Outer Belt
Seat Belt Anchor
Cover Cap Power Seat
Switch KnobSide Airbag Assembly
: Specified torque
N´m (kgf´cm, ft´lbf)

Non±reusable part
Hog Ring
61 (622, 45)
61 (622, 45)
19 (194, 14)
37 (375, 27)
37 (375, 27)
42 (430, 31)
37 (375, 27)37 (375, 27)
19 (194, 14)
19 (194, 14)
Headrest Support Headrest
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
RS±39
2270 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
SIDE AIRBAG ASSEMBLY
COMPONENTS

RS0JC±01
N20339
H03709
RS±40
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
2271 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
NOTICE:

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

Never use the airbag parts from another vehicle.
When replacing parts, replace them with new parts.
1. REMOVE FRONT SEAT OUTER BELT FLOOR AN-
CHOR
(a) Using a screwdriver, remove the seat belt anchor cover
cap.
HINT:
Tape the screwdriver tip before use.
(b) Remove the front seat outer belt floor anchor.
2. REMOVE FRONT SEAT
(a) Using a screwdriver, remove the 4 seat track covers.
HINT:
Tape the screwdriver tip before use.
(b) Remove the 4 bolts, then disconnect the airbag connec-
tor.
NOTICE:
When handling the airbag connector, take care not to dam-
age the airbag wire harness.
(c) Remove the front seat.
3. REMOVE HEADREST
4. REMOVE POWER SEAT SWITCH KNOBS
5. REMOVE FRONT SEAT CUSHION SHIELD
6. REMOVE FRONT SEAT INNER CUSHION COVER
7. REMOVE SIDE AIRBAG ASSEMBLY WIRE HARNESS
(a) Remove the connector from the bracket.
(b) Remove the 5 clamps and wire harness from the seat
cushion frame
8. REMOVE SEAT CUSHION ASSEMBLY
(a) Remove the wire harness from the seat cushion asseml-
by.
(b) Remove the 4 bolts and seat cushion assemlby from the
seat adjuster.

H02863
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
RS±41
2272 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
9. REMOVE SEATBACK ASSEMBLY
(a) Remove the 2 screws and pull the seatback board down-
ward to remove it.
(b) Remove the hog rings.
(c) Disconnect the connectors.
(d) Remove the 4 bolts and seatback assembly.
NOTICE:
Be careful not to damage the wire harness.
(e) Remove the 2 screws and seat cushion inside cover then
disconnect the wire harness from the seat cover.
HINT:
Do the same for LH and RH.

RS07L±02
H02603
Cross Section
H11875
RS±42
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
2273 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. Vehicles not involved in collision:
INSPECT SUPPLEMANTAL RESTRAINT SYSTEM
(a) Do a diagnostic system check (See page DI±552).
(b) Do a visual check which includes the following item with
the seatback assembly installed in the vehicle.
Check that there are no cuts or frayed in seams and out-
side of seatback cover.
2. Vehicle involved in a collision and airbag is not
deployed:
INSPECT SUPPLEMENTAL RESTRAINT SYSTEM
(a) Do a diagnostic system check (See page DI±552).
(b) Do a visual check which includes the following items with
the seatback assembly removed from the vehicle.

Check cuts and cracks of the side airbag assembly.

Check cuts and cracks in wire harness, and chip-
ping in connectors.
CAUTION:
For removal and installation of the seatback assembly, see
page RS±40 and RS±50. Be sure to follow the correct pro-
cedure.
3. Vehicle involved in a collision and airbag is deployed:
INSPECT SUPPLEMENTAL RESTRAINT SYSTEM
(a) Do a diagnostic system check (See page DI±552).
(b) Do a visual check which includes the following items with
the seatback assembly removed from the vehicle.

Check the seatback installation part of the seat ad-
juster.

Check the damage to the connector and wire har-
ness.
HINT:
If the seat adjuster is deformed, never repair it. Always replace
it with new one.

RS0JD±01
AB0152
SST
AB0158
Battery
SST
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
RS±43
2274 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISPOSAL
HINT:
When scrapping vehicles equipped with an SRS or disposing
of the side airbag assembly always first deploy the airbag in ac-
cordance with the procedure described below. If any abnormal-
ity occurs with the airbag deployment, contact the SERVICE
DEPT. of TOYOTA MOTOR SALES, U.S.A., INC.
CAUTION:

Never dispose of a side airbag assembly which has
an undeployed airbag.

The airbag produces a sizeable exploding sound
when it deploys, so perform the operation out±of±
doors and where it will not create a nuisance to
nearby residents.

When deploying the airbag, always use the specified
SST (SRS Airbag Deployment Tool), perform the op-
eration in a place away from electrical noise.
SST 09082±00700

When deploying an airbag, perform the operation at
least 10 m (33 ft) away from the airbag assembly.

The side airbag assembly is very hot when the airbag
is deployed, so leave it alone for at least 30 minutes
after deployment.

Use gloves and safety glasses when handling side
airbag assembly with the deployed airbag.

Always wash your hands with water after completing
the operation.

Do not apply water, etc. to a side airbag assembly with
the deployed airbag.
1. AIRBAG DEPLOYMENT WHEN SCRAPPING VE-
HICLE
HINT:
Have a battery ready as the power source to deploy the airbag.
(a) Check functioning of the SST
(See step 1±(a) on page RS±17).
SST 09082±00700

H03447
H03448
Battery
SST
R13455
10 m (33 ft) or more
SSTBattery
H02604
RS±44
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
2275 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Disconnect the side airbag connector.
NOTICE:
When handling the airbag connector, take care not to dam-
age the airbag wire harness.
(c) Install the SST.
(1) Connect the connectors of the 2 SST to the airbag
connector.
SST 09082±00700, 09082±00750
NOTICE:
To avoid damaging the SST connector and wire harness,
do not lock the secondary lock of the twin lock.
(2) Move the SST at least 10 m (33 ft) away from the
front of the vehicle.
(3) Close all the doors and windows of the vehicle.
NOTICE:
Take care not to damage the SST wire harness.
(4) Connect the SST red clip to the battery positive (+)
terminal and the black clip to the battery negative
(±) terminal.
(d) Deploy the airbag.
(1) Check that no one is inside the vehicle or within 10
m (33 ft) area around the vehicle.
(2) Press the SST activation switch and deploy the air-
bag.
CAUTION:

The side airbag assembly is very hot when the airbag
is deployed, so leave it alone for at least 30 minutes
after deployment.

Use gloves and safety glasses when handling the
side airbag assembly with the deployed airbag.

Do not apply water, etc. to the side airbag assembly
with the deployed airbag.

Always wash your hands with water after completing
the operation.

When scrapping a vehicle, deploy the airbag and
scrap the vehicle with the side airbag assembly still
installed.

H02600
H02601
H02602
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
RS±45
2276 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
HINT:
The airbag deploys simultaneously as the LED of SST activa-
tion switch lights up.
2. DEPLOYMENT WHEN DISPOSING OF SIDE AIRBAG
ASSEMBLY
NOTICE:

When disposing of the side airbag assembly only,
never use the customer's vehicle to deploy the air-
bag.

Be sure to follow the procedure given below when de-
ploying the airbag.
HINT:
Have a battery ready as the power source to deploy the airbag.
(a) Remove the seatback assembly (See page RS±40).
(b) Remove the side airbag assembly from the seatback as-
sembly.
(1) Remove the clamp.
(2) Remove the hook.
(3) Remove the 2 bolts and 2 hooks.
(4) Remove the 2 nuts and side airbag assembly.
CAUTION:

Do not store the side airbag assembly with the airbag
deployment side facing down.

Never disassemble the side airbag assembly.

AB0163
Wire Harness
Diameter
Stripped Wire Harness Section
H00549
H00548
H02607
RS±46
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
2277 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Using a service±purpose wire harness, tie down the side
airbag assembly to the tire.
Wire harness: Stripped wire harness section
1.25 mm
2
or more (0.0019 in2. or more)
CAUTION:
If a wire harness which is too thin or some other thing is
used to tie down the side airbag assembly, it may be
snapped by the shock when the airbag is deployed. This is
highly dangerous. Always use a wire harness for vehicle
use which is at least 1.25 mm
2 (0.0019 in2.).
HINT:
To calculate the square of the stripped wire harness section±
Square = 3.14 x (Diameter)
2 divided by 4
(1) Install the 2 nuts to the side airbag assembly.
(2) Wind the wire harness around the stud bolts of the
side airbag assembly as shown in the illustration.
(3) Position the side airbag assembly inside the tire
with the airbag deployment direction facing inside.
Tire size: Must exceed the following dimensions±
Width: 185 mm (7.28 in.)
Inner diameter: 360 mm (14.17 in.)
CAUTION:

Make sure the wire harness is tight. It is very danger-
ous when a loose wire harness results in the side air-
bag assembly coming free due to the shock from the
airbag deploying.

AB0158
SSTBattery
H02608
Tires
(5 or More)
R05403
H0260910 m (33 ft) or more SSTBattery Side Airbag Assembly
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
RS±47
2278 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

Always tie down the side airbag assembly with the
airbag deployment side facing inside.
NOTICE:
The tire will be marked by the airbag deployment, so when
disposing of the airbag use a redundant tire.
(d) Check functioning of the SST
(See step 1±(a) on page RS±17).
SST 09082±00700
(e) Place the tires.
(1) Place at least 2 tires under the tire to which the side
airbag assembly is tied.
(2) Place at least 2 tires over the tire to which the side
airbag assembly is tied. The top tire should have the
wheel installed.
(3) Tie the tires together with 2 wire harness.
CAUTION:
Make sure that the wire harness are tight. It is very danger-
ous when loose wire harness results in the tires coming
free due to the shock from the airbag deploying.
HINT:
Place the SST connector and wire harness inside tires. Secure
at least 1 m (3 ft) of slack for the wire harness.
(f) Install the SST.
Connect the connectors of the 2 SST to the side airbag
assembly connector.
SST 09082±00700, 09082±00750
NOTICE:
To avoid damaging the SST connector and wire harness,
do not lock the secondary lock of the twin lock. Also, se-
cure some slack for the SST wire harness inside the tire.
(g) Deploy the airbag.