lock LEXUS GS400 2000 Service Repair Manual

F03661
SST
F03662
SST
Fulcrum
Length
R07337
Rack Groove
F03663Fulcrum Length SST
± STEERINGPOWER STEERING GEAR
SR±55
2225 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(f) Using SST and a torque wrench, tighten the cap until the
preload is within specification.
SST 09616±00010
Preload (turning):
0.5 ±1.7 N´m (4.7±17.2 kgf´cm, 4.1±14.9 in.´lbf)
12. INSTALL RACK GUIDE SPRING CAP LOCK NUT
(a) Apply sealant to 2 or 3 threads of the nut.
Sealant:
Part No.08833±00080, THREE BOND 1344,
LOCTITE 242 or equivalent
(b) Holding the rack guide spring cap rotating, and using
SST, torque the nut.
SST 09922±10010
Torque: 51 N´m (521 kgf´cm, 38 ft´lbf)
NOTICE:
Use SST 09922±10010 in the direction shown in the illustra-
tion.
HINT:
Use a torque wrench with a fulcrum length of 345 mm (13.58
in.).
(c) Recheck the total preload.
Preload (turning):
0.5 ±1.7 N´m (4.7±17.2 kgf´cm, 4.1±14.9 in.´lbf)
(d) Remove the RH and LH rack ends.
13. INSTALL RH AND LH CLAW WASHERS AND RACK
ENDS
(a) Install a new washer, and temporarily tighten the rack
end.
HINT:
Align the claws of the washer with the steering rack grooves.
(b) Using a spanner to hold the steering rack steady, and us-
ing SST, torque the rack end.
SST 09922±10010
Torque: 76 N´m (770 kgf´cm, 56 ft´lbf)
NOTICE:
Use SST 09922±10010 in the direction shown in the illustra-
tion.
HINT:
Use a torque wrench with a fulcrum length of 345 mm (13.58
in.).

R06400
Brass Bar
W00123
W04397
F02586
SSTFulcrum
Length
SR±56
± STEERINGPOWER STEERING GEAR
2226 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Using a brass bar and hammer, stake the washer.
NOTICE:
Avoid any impact to the rack.
14. INSTALL RH AND LH RACK BOOTS, CLAMPS AND
CLIPS
(a) Ensure that the tube hole is not clogged with grease.
HINT:
If the tube hole is clogged, the pressure inside the boot will
change after it is assembled and the steering wheel is turned.
(b) Install the boot.
NOTICE:
Be careful not to damage or twist the boot.
(c) Using pliers tighten a new clamp, as shown in the illustra-
tion.
15. INSTALL RH AND LH TIE ROD ENDS AND LOCK NUTS
(a) Screw the lock nut and tie rod end onto the rack end until
the matchmarks are aligned.
(b) After adjusting toe±in, torque the nut.
(See page SA±4)
Torque: 55 N´m (560 kgf´cm, 41 ft´lbf)
16. INSTALL 2 TURN PRESSURE TUBES
(a) Install a new union seat to the rack housing.
(b) Using SST, install the tube.
SST 09633±00020
Torque: 20 N´m (203 kgf´cm, 15 ft´lbf)
HINT:

Use a torque wrench with a fulcrum length of 300 mm
(11.81 in.).

This torque value is effective in case that SST is parallel
to a torque wrench.

SR0DK±03
F03671
Column Upper CoverCombination Switch
(w/ Spiral Cable)Steering Wheel Lower
No.2 CoverTorx Screw
Steering Wheel Pad
Steering Wheel
Steering Wheel Lower No.3
Cover
Finish Plate Steering Column
Assembly
Column Lower Cover
8.8 (90, 78 in.´lbf)
Torx Screw
8.8 (90, 78 in.´lbf)
35 (360, 26)
25 (260, 19)
End Pad
No.1 Safety
Pad Brake Pedal
Return Spring
Dust Cover
Intermediate Shaft
Assembly
Heater to Register Dust No.7
OBD II
No.1 Under CoverHood Lock Release
Lever
N´m (kgf´cm, ft´lbf) : Specified torque
35 (360, 26)
± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMNSR±9
2179 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
POWER TILT AND POWER TELESCOPIC STEERING
COLUMN
COMPONENTS

F09281
No.2 Intermediate Shaft
Assembly
Tilt and Telescopic ECUNo.2 BracketSteering Column
Protector
No.1 Bracket Column Tube SupportIgnition Switch
Tapered±Head Bolt
Tilt Steering Gear
Assembly with MotorTurn Signal
Bracket Key Interlock
SolenoidKey Unlock Warning
Switch
Key Cylinder
Illumination
Key Cylinder
35 (360, 26)
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable part
20 (204, 15)
Tube Attachment
Column Upper
BracketTransponder Key coil
Transponder Key
Amplifier

Plate
Tilt Slider
Assembly23 (230, 17)



Bushing

23 (230, 17)

Plate

Bushing
Washer
Washer
SR±10± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMN
2180 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

RS01Y±06
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±1
2232 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
SRS AIRBAG
PRECAUTION
NOTICE:

The LEXUS GS 400/300 is equipped with SRS, which comprises a driver airbag, front passenger
airbag and side airbag. Failure to carry out service operations in the correct sequence 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 installation of parts, inspec-
tion or replacement), be sure to read the following items carefully, then follow the correct proce-
dures described in the repair manual.

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most impor-
tant source of information when troubleshooting. When troubleshooting the SRS, always in-
spect the DTCs before disconnecting the battery.

Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front
passenger airbag assembly, side airbag assembly, airbag sensor assembly, front airbag sen-
sor and side airbag sensor assembly should be inspected (See page RS±15, RS±29, RS±42
, RS±60 and RS±65).

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side
airbag assembly, airbag sensor assembly, front airbag sensor or side airbag sensor assembly
in order to reuse it.

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, airbag sen-
sor assembly, front airbag sensor or side airbag sensor assembly has been dropped, or if there
are cracks, dents or other defects in the case, bracket or connector, replace them with new
ones.

Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting the system's
electrical circuits.

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

After work on the SRS is completed, perform the SRS warning light check or SRS side airbag
warning light check (See page DI±552).

If the vehicle is equipped with a mobile communication system, refer to the precaution in the
IN section.
CAUTION:

Work must be started after 90 seconds from when the ignition switch is turned to the ºLOCKº
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 within 90 seconds
from disconnecting the negative (±) terminal cable of the battery, the SRS may be deployed.)

When the negative (±) terminal cable is disconnected from the battery, the memory of the clock
and audio system will be canceled. So before starting work, make a record of the contents mem-
orized in the audio memory system. When work is finished, reset the audio systems as they
were before and adjust the clock. To avoid erasing the memory in each memory system, never
use a back± up power supply from outside the vehicle.

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during
repairs.

Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly,
airbag sensor assembly, front airbag sensor or side airbag sensor assembly directly to hot air
or flames.

H02584
AB0158
SSTBattery
H02585
SST RS±22
± SUPPLEMENTAL RESTRAINT SYSTEMSTEERING WHEEL PAD AND SPIRAL CABLE
2253 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(4) Face the upper surface of the steering wheel pad
upward. Separately tie the left and right sides of the
steering wheel pad to the disc wheel through the
hub nut holes. Position the steering wheel pad con-
nector so that it hangs downward through a hub
hole in the disc wheel.
CAUTION:

Make sure that the wire harness is tight. It is very dan-
gerous when looseness in the wire harness results in
the steering wheel pad coming free through the shock
from the airbag deploying.

Always tie down the steering wheel pad with the pad
side facing upward. It is very dangerous when the
steering wheel pad is tied down with the metal sur-
face facing upward and the steering wheel pad will be
thrown into the air.
NOTICE:
The disc wheel will be marked by airbag deployment, so
use the redundant disc wheel.
(d) Check functioning of SST.
SST 09082±00700, 09082±00760
(e) Install the SST
CAUTION:
Place the disc wheel on the level ground.
(1) Connect the 2 SST each other, then connect them
to the steering wheel pad connector.
SST 09082±00700, 09082±00760
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 disc
wheel.
(2) Move the SST to at least 10 m (33 ft) away from
steering wheel pad tied down on the disc wheel.

H00998
Pretensioner (LH)Side Airbag Assembly (LH)
(Squib)Side Airbag Sensor (LH) Front Airbag Sensor (LH) Front Airbag Sensor (RH) Side Airbag Sensor (RH)Side Airbag Assembly (RH)
(Squib) Pretensioner (RH)
Airbag Sensor
AssemblyFront Passenger
Airbag Assembly
Spiral Cable
Steering Wheel
Pad (Squib)
Driver's Side J/B 12
34
5
67 8
10
119
12 13 1415
RS±4
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2235 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
10. SRS CONNECTORS
No.ItemApplication
(1)Terminal Twin±Lock MechanismConnectors 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15
(2)Airbag Activation Prevention MechanismConnectors 1, 2, 3, 4, 5, 7, 8, 9, 12, 13
(3)Electrical Connection Check MechanismConnectors 1, 2, 3
(4)Connector Twin±Lock MechanismConnectors 5

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
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±5
2236 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(a) All connectors in the SRS are colored in yellow to distin-
guish them from other connectors. Connectors having
special functions and specifically designed for the SRS
are used in the locations shown in the diagram on the pre-
vious page to ensure high reliability. These connectors
use durable 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 se-
cures the locking of the terminal by two locking de-
vices (the retainer and the lance) to prevent
terminals from coming out.
(2) Airbag Activation Prevention Mechanism
Each connector contains a short spring plate. When
the connector is disconnected, the short spring
plate automatically connects the power source and
grounding terminals of the squib.

R12076Airbag Sensor AssemblyDisconnection
Detection
PinSRS
Warning
Light
H00955
Terminal for Diagnosis
Disconnection Detection Pin
Half Connection
Complete Connection
Terminal for
Diagnosis
RS±6
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2237 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
HINT:
The type of connector shown on the previous page is used for
the spiral cable connector º5º on the airbag sensor assembly
side.
(3) Electrical Connection Check Mechanism
This mechanism electrically checks that connectors
are connected correctly and completely. The electri-
cal connection check mechanism is designed so
that the disconnection detection pin connects with
the diagnosis terminals when the connector hous-
ing lock is locked.
HINT:
The above illustration shows connectors º1º, º2º and º3º.

AB0089
Secondary Lock
Primary LockLockLock
Primary Lock Incomplete
(Secondary Lock Prevented)Primary Lock Complete
(Secondary Lock Permitted)Twin±Lock Completed
Z14034
Fig.1
Fig.2Power Source
Safing
Sensor
Squibs
Airbag Sensor
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
RS±7
2238 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(4) Connector Twin±Lock Mechanism
With this mechanism connectors (male and female
connectors) are locked by 2 locking devices to in-
crease the connection reliability. If the primary lock
is incomplete, ribs interfere and prevent the sec-
ondary lock.
(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. A
safing sensor is designed to go on at a smaller decelera-
tion rate than the airbag sensor. As illustrated in Fig. 2,
ignition is caused when current flows to the squib, which
happens when a safing sensor and the airbag sensor go
on simultaneously. When a deceleration force acts on the
sensors, 2 squibs in the driver airbag and front passenger
airbag ignite and generate gas. The gas discharging into
the driver airbag and front passenger airbag rapidly in-
creases the pressure inside the bags, breaking open the
steering wheel pad and instrument panel door.
Bag inflation then ends, and the bags deflate as the gas
is discharged through discharge holes at the bag's rear or
side.