steering LEXUS GS400 2000 Service Service Manual

± SERVICE SPECIFICATIONSENGINE MECHANICAL (2JZ±GE)
SS±9
165 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)Part tightened
N´mkgf´cmft´lbf
Drive plate x Torque converter clutch4849035
Rear support member x Engine rear mounting insulator13.513510
Front suspension crossmember x Engine mounting insulator7071452
PS gear housing x Front suspension member6566048
Sliding yoke x Steering intermediate shaft3536026
Transmission control rod x Shift lever131309
Transmission control rod x Transmission131309
A/C compressor x Cylinder block Stud bolt
Bolt and nut26
52265
53019
38
Fuel inlet hose x Fuel pipe support2930022
Front suspension member brace x Front suspension member5859043
Front suspension member brace x Strut bar bracket plate5859043
Connecting rod cap x Connecting rod 1st
2nd30
Turn 90°300
Turn 90°22
Turn 90°
Main bearing cap x Cylinder block 1st
2nd45
Turn 90°450
Turn 90°33
Turn 90°
Rear oil seal retainer x Cylinder block6.06053
Engine mounting bracket x Cylinder block5959044
Fuel inlet pipe x Cylinder block2929021
No.1 oil pipe x Cylinder block5555041
Oil filter bracket x Cylinder block9090066
No.2 water bypass pipe x Water pump2121015
No.2 water bypass pipe x Cylinder block2121015
Generator x Water pump4040030
Generator x Cylinder block4040030
Front exhaust pipe x Center exhaust pipe4444032
Center exhaust pipe x Tailpipe4444032
Heated oxygen sensor x Front exhaust pipe4545033

SR0DE±01
± STEERINGSTEERING SYSTEM
SR±1
2171 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
STEERING SYSTEM
PRECAUTION

Care must be taken to replace parts properly because they could affect the performance of the
steering system and result in a driving hazard.

The LEXUS GS400/300 is equipped with SRS (Supplemental Restraint System) such as the driv-
er airbag and front passenger airbag. Failure to carry out service operation in the correct se-
quence could cause the SRS to unexpectedly deployed during servicing, possibly leading to
a serious accident. Before servicing (including removal or installation of parts, inspection or
replacement), be sure to read the precautionary notices in the RS section.

SR0DL±04
F03675
Screw
Case Torx
Screw
F02560
Airbag Connector
Correct Wrong
F02561
Matchmarks
SST
± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMNSR±11
2181 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE STEERING WHEEL PAD
NOTICE:

If the airbag connector is disconnected with the igni-
tion switch at ON or ACC, DTCs will be recorded.

Never use airbag parts from another vehicle. When
replacing parts, replace with new ones.
(a) Place the front wheels facing straight ahead.
(b) Remove the steering wheel lower No.2 and No.3 covers.
(c) Using a torx socket wrench, loosen the 2 torx screws.
HINT:
Loosen the 2 screws until the groove along the screw circumfer-
ence catches on the screw case.
(d) Pull the pad out from the steering wheel and disconnect
the airbag connector.
CAUTION:

When storing the wheel pad, keep the upper surface
of the pad facing upward.

Never disassemble the wheel pad.
NOTICE:
When removing the wheel pad, take care not to pull the air-
bag wire harness.
2. REMOVE STEERING WHEEL
(a) Disconnect the connector.
(b) Remove the steering wheel set nut.
(c) Place matchmarks on the steering wheel and main shaft
assembly.
(d) Using SST, remove the wheel.
SST 09950±50012 (09951±05010, 09952±05010,
09953±05020, 09954±05020)

F02562
Matchmarks
A
B
F02563
SR±12± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMN
2182 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. REMOVE UPPER AND LOWER COLUMN COVERS
Remove the 3 screws.
4. REMOVE COMBINATION SWITCH WITH SPIRAL
CABLE
(a) Disconnect the 4 connectors.
(b) Disconnect the airbag connector.
(c) Remove the 3 screws.
5. REMOVE SPIRAL CABLE (See page BE±34)
NOTICE:
Do not disassemble the cable or apply oil to it.
6. REMOVE NO.1 UNDER COVER
(a) Remove the 3 screws.
(b) Disconnect the OBD II.
(c) Disconnect the connectors.
7. REMOVE FINISH PLATE AND END PAD
8. REMOVE NO.1 SAFETY PAD
(a) Remove the 2 screws and disconnect the hood lock re-
lease lever from the panel.
(b) Remove 4 pad set bolts and screw.
9. REMOVE HEATER TO REGISTER DUCT NO.7
10. DISCONNECT INTERMEDIATE SHAFT ASSEMBLY
(a) Place matchmarks on the intermediate shaft and control
valve shaft.
(b) Loosen the bolt A and remove the bolt B.
11. REMOVE STEERING COLUMN ASSEMBLY
(a) Disconnect the connectors.
(b) Remove the brake pedal return spring.
(c) Loosen the hole cover clamp.
(d) Remove the 4 column assembly set nuts.
12. REMOVE INTERMEDIATE SHAFT ASSEMBLY
Remove the bolt A.
13. REMOVE DUST COVER

SR0X0±01
F01848Matchmarks
F01849Screw Extractor
F09385
± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMNSR±13
2183 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
NOTICE:
When using a vise, do not overtighten it.
1. REMOVE TRANSPONDER KEY COIL
Remove the screw and transponder key coil.
2. REMOVE KEY CYLINDER LAMP ILLUMINATION
3. REMOVE NO.2 INTERMEDIATE SHAFT ASSEMBLY
(a) Place matchmarks on the No.2 shaft and main shaft.
(b) Remove the bolt and No.2 intermediate shaft assembly.
4. REMOVE COLUMN UPPER BRACKET
(a) Using a centering punch, mark the center of the 2 ta-
pered±head bolts.
(b) Using a 4±5 mm (0.16±0.20 in.) drill, drill into the 2 bolts.
(c) Using a screw extractor, remove the 2 bolts and column
upper bracket.
5. REMOVE COLUMN TUBE SUPPORT
(a) Remove the bolt and column tube support.
(b) Remove the tube support with tube attachment.
(c) Remove the tube attachment from the tube support.
6. REMOVE TURN SIGNAL BRACKET
Remove the 3 bolts and turn signal bracket.
7. REMOVE STEERING COLUMN PROTECTOR
Remove the 2 bolts and steering column protector.
8. REMOVE TILT SLIDER ASSEMBLY
(a) Using a hexagon wrench, remove the 4 bolts, 2 washers
and tilt slider assembly.
(b) Remove the 4 bushings, 2 plates from tilt slider assembly.
9. REMOVE NO.1 BRACKET
Remove the bolt and No.1 bracket.
10. REMOVE NO.2 BRACKET
Remove the bolt and No.2 bracket.
11. REMOVE TILT AND TELESCOPIC ECU
Remove the 2 bolts and tilt and telescopic ECU.

SR0DN±01
F01850
F01851
SR±14± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMN
2184 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT STEERING LOCK OPERATION
Check that the steering lock mechanism operates properly.
2. IF NECESSARY, REPLACE KEY CYLINDER
(a) Place the ignition key at the ACC position.
(b) Push down the stop pin with a screwdriver, and pull out
the cylinder.
(c) Install a new cylinder.
HINT:
Make sure the key is at the ACC position.
3. INSPECT IGNITION SWITCH
(See page BE±31)
4. IF NECESSARY, REPLACE IGNITION SWITCH
(a) remove the 2 screws.
(b) Install a new switch with the 2 screws.
5. INSPECT KEY UNLOCK WARNING SWITCH
(See page BE±31)
6. INSPECT KEY INTERLOCK SOLENOID
(See page AT±12)
7. IF NECESSARY, REPLACE KEY UNLOCK WARNING
SWITCH WITH KEY INTERLOCK SOLENOID
(a) Remove the 2 screws.
(b) Install a new switch with solenoid with the 2 screws.
8. INSPECT TRANSPONDER KEY COIL
(See page BE±248)
9. IF NECESSARY, REPLACE TRANSPONDER KEY
COIL
10. IF NECESSARY, REPLACE TRANSPONDER KEY AM-
PLIFIER
(a) remove the screw.
(b) Install a new key amplifier with the bolt.

SR0X1±01
F09385
± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMNSR±15
2185 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REASSEMBLY
NOTICE:
When using a vise, do not overtighten it.
1. INSTALL TILT AND TELESCOPIC ECU
Install the tilt and telescopic ECU with the 2 screws.
2. INSTALL NO.2 BRACKET
Install the No.2 bracket with the bolt.
3. INSTALL NO.1 BRACKET
Install the No.1 bracket with the bolt.
4. INSTALL TILT SLIDER ASSEMBLY
(a) Install 2 new plates and 4 new bushings to the tilt slider
assembly in the direction shown in the illustration.
HINT:
Install the bushings with their cuts facing downward.
(b) Using a hexagon wrench, install the tilt slider assembly
with the 2 washers and 4 bolts.
Torque: 23 N´m (230 kgf´cm, 17 ft´lbf)
HINT:

When replacing a tilt slider assembly with new one, apply
grease on the removed tilt slider assembly to the shaft of
the new tilt slider assembly.

Install the tilt slider assembly with the bolt portion of the
tilt slider faced downward.

Do not let the grease be stuck on the thread part of the bolt
in order to prevent the bolt from slipping.
5. INSTALL STEERING COLUMN PROTECTOR
Install the steering column protector.
6. INSTALL TURN SIGNAL BRACKET
Install the turn signal bracket with the 3 bolts.
7. INSTALL COLUMN TUBE SUPPORT
NOTICE:
If the attachment or support is deformed, replace it with a
new one.
(a) Install the tube attachment to the tube support.
(b) Install the column tube support with the bolt.
Torque: 20 N´m (204 kgf´cm, 15 ft´lbf)
NOTICE:
Make sure to install the support facing the correct direction
(See page SR±9).

Tighten the bolt while holding the support to prevent
it turning too.

Be sure to tighten the bolt with the specified torque.

F01852
F01848Matchmarks
SR±16± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMN
2186 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
8. INSTALL COLUMN UPPER BRACKET
(a) Install the column upper bracket with 2 new tapered±
head bolts.
(b) Tighter the 2 tapered±head bolts until the bolt heads
break off.
9. INSTALL NO.2 INTERMEDIATE SHAFT ASSEMBLY
(a) Align the matchmarks on the No.2 shaft and main shaft.
(b) Install the bolt.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
10. INSTALL KEY CYLINDER ILLUMINATION
11. INSTALL TRANSPONDER KEY COIL
Install the transponder key coil with the screw.

SR0DP±01
F02563
F02562
A
B
Matchmarks
± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMNSR±17
2187 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. INSTALL DUST COVER
2. INSTALL INTERMEDIATE SHAFT ASSEMBLY
Temporarily tighten the bolt A.
3. INSTALL STEERING COLUMN ASSEMBLY
(a) Torque the 4 column assembly set nuts.
Torque: 25 N´m (260 kgf´cm, 19 ft´lbf)
(b) Tighten the hole cover clamp.
(c) Install the brake pedal return spring.
(d) Connect the connectors.
4. CONNECT INTERMEDIATE SHAFT ASSEMBLY
(a) Align the matchmarks on the intermediate shaft and con-
trol valve shaft.
(b) Torque the bolt B.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
(c) Torque the bolt A.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
5. INSTALL HEATER TO REGISTER DUCT NO.7
6. INSTALL NO.1 SAFETY PAD
(a) Install the 4 pad set bolts and screw.
(b) Install the 2 screws and connect the hood lock release le-
ver to the panel.
7. INSTALL FINISH PLATE AND END PAD
8. INSTALL NO.1 UNDER COVER
(a) Connect the connectors.
(b) Connect the OBD II.
(c) Tighten the 3 screws.
9. INSTALL SPIRAL CABLE
(See page BE±34)
10. INSTALL COMBINATION SWITCH WITH SPIRAL
CABLE
(a) Tighten the 3 screws.
(b) Connect the airbag connector.
(c) Connect the 4 connectors.
11. INSTALL UPPER AND LOWER COLUMN COVERS
Tighten the 3 screws.

F02564Mark
F03676
Torx ScrewScrew Case
SR±18± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMN
2188 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
12. CENTER SPIRAL CABLE
(a) Check that the front wheels are facing straight ahead.
(b) Turn the cable counterclockwise by hand until it becomes
harder to turn the cable.
(c) Then rotate the cable clockwise about 3 turns to align the
mark.
HINT:
The cable will rotate about 3 turns to either left or right of the
center.
13. INSTALL STEERING WHEEL
(a) Align the matchmarks on the wheel and main shaft.
(b) Torque the wheel set nut.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
(c) Connect the connector.
14. INSTALL STEERING WHEEL PAD
NOTICE:

Make sure the wheel pad is installed to the specified
torque.

If the wheel pad has been dropped, or there are
cracks, dents or other defects in the case or connec-
tor, replace the wheel pad with a new one.

When installing the wheel pad, take care that the wir-
ings do not interfere with other parts and are not
pinched between other parts.
(a) Connect the airbag connector.
(b) Install the pad after confirming that the circumference
groove of the torx screw is caught on the screw case.
(c) Using a torx socket wrench, torque the 2 screws.
Torque: 8.8 N´m (90 kgf´cm, 78 in.´lbf)
(d) Install the steering wheel lower No.2 and No.3 covers.
15. CHECK STEERING WHEEL CENTER POINT