2000 LEXUS GS400 power steering

SS0F3±01
± SERVICE SPECIFICATIONSSTEERING
SS±57
213 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
STEERING
SERVICE DATA
POWER STEERING FLUID
Fluid level rise Maximum5 mm (0.20 in.)
Fluid pressure at idle speed with valve closed Minimum8,336 kPa (85 kgf/cm2, 1,209 psi)
STEERING WHEEL
Steering wheel freeplayMaximum30 mm (1.18 in.)
Steering effort at idle speedMaximum7 N´m (70 kgf´cm, 61 in.´lbf)
PS VANE PUMP
2JZ±GE Engine:
Vane pump rotating torqueMaximum0.25 N´m (2.5 kgf´cm, 2.2 in.´lbf)
Oil clearance between pump shaft and bushing STD0.03 ± 0.05 mm (0.0012 ± 0.0020 in.)
Oil clearance between pump shaft and bushingMaximum0.07 mm (0.0028 in.)
Vane plate heightMinimum8.6 mm (0.339 in.)
Vane plate thickness Minimum1.40 mm (0.0551 in.)
Vane plate lengthMinimum14.99 mm (0.5902 in.)
Clearance between the rotor groove and plateMaximum0.033 mm (0.0013 in.)
Vane plate length Pump rotor and cam ring mark
NONE14.999 ± 15.001 mm (0.59051 ± 0.59059 in.)
114.997 ± 14.999 mm (0.59043 ± 0.59051 in.)
214.995 ± 14.997 mm (0.59035 ± 0.59043 in.)
314.993 ± 14.995 mm (0.59027 ± 0.59035 in.)
414.991 ± 14.993 mm (0.59020 ± 0.59027 in.)
Spring free lengthMinimum33.2 mm (1.307 in.)
1UZ±FE Engine:
Vane pump rotating torqueMaximum0.25 N´m (2.5 kgf´cm, 2.2 in.´lbf)
Oil clearance between pump shaft and bushing STD0.03 ± 0.05 mm (0.0012 ± 0.0020 in.)
Oil clearance between pump shaft and bushingMaximum0.07 mm (0.0028 in.)
Vane plate heightMinimum8.0 mm (0.315 in.)
Vane plate thickness Minimum1.77 mm (0.0697 in.)
Vane plate lengthMinimum14.97 mm (0.5894 in.)
Clearance between the rotor groove and plateMaximum0.035 mm (0.0014 in.)
Vane plate length Pump rotor and cam ring mark
NONE14.996 ± 14.998 mm (0.59039 ± 0.59047 in.)
114.994 ± 14.996 mm (0.59032 ± 0.59039 in.)
214.992 ± 14.994 mm (0.59024 ± 0.59032 in.)
314.990 ± 14.992 mm (0.59016 ± 0.59024 in.)
414.988 ± 14.990 mm (0.59008 ± 0.59016 in.)
Spring free lengthMinimum36.0 mm (1.42 in.)
POWER STEERING GEAR
Steering rack runout Maximum0.30 mm (0.0118 in.)
Total preload (Control valve rotating torque)0.5 ± 1.7 N´m (4.7 ± 17.2 kgf´cm, 4.1 ± 14.9 in.´lbf)
PROGRESSIVE POWER STEERING (PPS)
PPS solenoid valve resistance6 ± 11 W

SS0F4±03
SS±58
± SERVICE SPECIFICATIONSSTEERING
214 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TORQUE SPECIFICATION
Part tightenedN´mkgf´cmft´lbf
STEERING COLUMN
Steering wheel pad set screw (Torx screw)8.89078 in.´lbf
Steering wheel set nut3536026
Intermediate shaft assembly x Control valve shaft3536026
No.2 intermediate shaft assembly x Intermediate shaft assembly3536026
Column assembly set nut2526019
No.2 intermediate shaft assembly x Main shaft3536026
Column tube support set bolt2020415
Tilt slider assembly set bolt2323017
POWER STEERING VANE PUMP
2JZ±GE Engine:
Union bolt4950036
Pump assembly set bolt5859043
Vane pump pulley set nut4344032
Front housing x Rear housing2424017
Oil reservoir set bolt Front131309
Rear2424017
Solenoid valve x Front housing51 (69)524 (700)38 (51)
1UZ±FE Engine:
Union bolt4950036
Pump assembly set bolt4344032
Pump assembly set nut4344032
Vane pump pulley set nut4344032
Front housing x Rear bracket3940029
Suction port union set bolt131309
Air control valve2930022
Solenoid valve x Front housing51 (69)524 (700)38 (51)
POWER STEERING GEAR
Intermediate shaft assembly x Control valve shaft3536026
Pressure feed and return tube set union bolt4243031
PS gear assembly set bolt6566048
Tube clamp set bolt55548 in.´lbf
Turn pressure tube20 (25)203 (250)15 (18)
Tie rod end Lock nut5556041
Rack end x Steering rack76 (103)770 (1,050)56 (76)
Rack guide spring cap lock nut51 (69)521 (700)38 (51)
Rack guide spring cap2525018
Control valve assembly set bolt1818513
Bearing guide nut2525018
Cylinder end stopper5960043
( ): For use without SST

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.