2000 LEXUS GS400 Service Repair Manual

P10588
Ohmmeter
Continuity
P10589
Ohmmeter
No Continuity
Z07019
Brush Holder Side
Field Frame Side
Length
Length
ST0019
ST±8
± STARTING (2JZ±GE)STARTER
1626 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
3. INSPECT FIELD COIL
(a) Check the field coil for open circuit.
Using an ohmmeter, check that there is continuity be-
tween the lead wire and field coil brush lead.
If there is no continuity, replace the field frame.
(b) Check the field coil for ground.
Using an ohmmeter, check that there is no continuity be-
tween the field coil end and field frame.
If there is continuity, replace the field frame.
4. INSPECT BRUSHES
Using a vernier caliper, measure the brush length.
Standard length: 15.5 mm (0.610 in.)
Minimum length: 10.0 mm (0.394 in.)
If the length is less than minimum, replace the brush holder and
field frame.
5. INSPECT BRUSH SPRINGS
Check the brush spring load. Take the pull scale reading the
instant the brush spring separates from the brush.
Standard spring installed load:
17.6 ± 23.5 N (1.8 ± 2.4 kgf, 3.9 ± 5.3 lbf)
Minimum spring installed load:
11.8 N (1.2 kgf, 2.6 lbf)
If the installed load is less than minimum, replace the brush
springs.

P10592
Ohmmeter
No Continuity
P10821
Free
LOCK
B01968
Ohmmeter
Continuity
Terminal CTerminal 50
B01969
Ohmmeter
Continuity
Terminal 50
± STARTING (2JZ±GE)STARTER
ST±9
1627 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
6. INSPECT BRUSH HOLDER
Check the brush holder insulator. Using an ohmmeter, check
that there is no continuity between the positive (+) and negative
(±) brush holders.
If there is continuity, repair or replace the brush holder.
7. INSPECT CLUTCH AND GEAR
(a) Check the gear teeth on the pinion gear, idle gear and the
clutch assembly for wear or damage.
If damaged, replace the gear or clutch assembly.
If damaged, also check the drive plate ring gear for wear or
damage.
(b) Check the clutch pinion gear.
Rotate the pinion gear counterclockwise, and check that
it turns freely. Try to rotate the pinion gear clockwise and
check that it locks.
If necessary, replace the clutch assembly.
8. INSPECT MAGNETIC SWITCH
(a) Check the pull ±in coil for open circuit.
Using an ohmmeter, check that there is continuity be-
tween terminals 50 and C.
If there is no continuity, check and replace the magnetic switch.
(b) Check the hold±in coil for open circuit.
Using an ohmmeter, check that there is continuity be-
tween terminal 50 and the switch body.
If there is no continuity, replace the magnetic switch.
9. INSPECT BEARING
Turn the bearing by hand and while apply inward force.
If resistance is felt or bearing sticks, replace the bearing.
(See page ST±10)

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.