LEXUS GS400 2000 Service Repair Manual

ST04Y±01
B02010
Clamp Bracket
Starter
Starter ConnectorStarter Wire
Engine Wire
ST±2
± STARTING (2JZ±GE)STARTER
1620 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
STARTER
COMPONENTS

B01640
Starter Clutch Assembly
Magnetic Switch AssemblyReturn SpringStarter Housing
Idler Gear
Steel Ball

O±Ring
Armature
Front Bearing

Rear Bearing
Field Frame (Field Coil)
Dust Protector

Non±reusable part
Brush Holder

O±Ring
End CoverBearing
B01641

Terminal C Kit Part

Terminal 30 Kit Part

Non±reusable partTerminal Insulator
Wave Washer
Terminal Insulator
O±RingContact Plate
Terminal
Bolt
17 (170, 12)
End Cover
GasketPlunger
Lead
Terminal
O±RingPacking
Terminal Insulator
Wave Washer
17 (170, 12)
Terminal Bolt
Contact Plate
Terminal Insulator
Insulation Paper
N´m (kgf´cm, ft´lbf) : Specified torqueMagnetic Switch Assembly
± STARTING (2JZ±GE)STARTER
ST±3
1621 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

ST04Z±01
B01960
B01981
Clamp
Bracket
ST±4
± STARTING (2JZ±GE)STARTER
1622 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
REMOVE STARTER
(a) Remove the rubber cap and nut, and disconnect the start-
er wire.
(b) Disconnect the starter connector.
(c) Remove the 2 bolts and starter.
Torque: 37 N´m (380 kgf´cm, 27 ft´lbf)
HINT:
At time of the installation, place refer to the following item.
When installing the upper bolt, tighten it together with the clamp
bracket.

ST050±01
B02814
B01647
B01959
B01970
(1)
(2)(3)(4)
(5)
ST0948
Magnetic Finger
± STARTING (2JZ±GE)STARTER
ST±5
1623 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
DISASSEMBLY
1. REMOVE DUST PROTECTOR
2. REMOVE FIELD FRAME AND ARMATURE
(a) Remove the nut, and disconnect the lead wire from the
magnetic switch terminal.
Torque: 5.9 N´m (60 kgf´cm, 52 in.´lbf)
(b) Remove the 2 through bolts.
Torque: 5.9 N´m (60 kgf´cm, 52 in.´lbf)
(c) Pull out the field frame together with the armature.
HINT:
Align the protrusion of the field frame with the groove of the
magnetic switch.
(d) Remove the O±ring from the field frame.
HINT:
At the time of installation, please refer to the following items.
Use a new O±ring.
3. REMOVE STARTER HOUSING, CLUTCH ASSEMBLY
AND GEAR
(a) Remove the 2 bolts.
Torque: 5.9 N´m (60 kgf´cm, 52 in.´lbf)
(b) Remove these parts from the magnetic switch:
(1) Starter housing
(2) Return spring
(3) Idler gear
(4) Bearing
(5) Clutch assembly
4. REMOVE STEEL BALL
Using a magnetic finger, remove the steel ball from the clutch
shaft hole.

B01645
P10568
ST±6
± STARTING (2JZ±GE)STARTER
1624 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
5. REMOVE BRUSH HOLDER
(a) Remove the 2 screws and end cover from the field frame.
Torque: 1.5 N´m (15 kgf´cm, 13 in.´lbf)
(b) Remove the O±ring from the field frame.
HINT:
At the time of installation, please refer to the following items.
Use a new O±ring.
(c) Using a screwdriver, hold the spring back and disconnect
the brush from the brush holder. Disconnect the 4
brushes, and remove the brush holder.
NOTICE:
Check that the positive (+) lead wires are not grounded.
6. REMOVE ARMATURE FROM FIELD FRAME

ST051±01
P10584
Ohmmeter
Continuity
P10585
Ohmmeter
No Continuity
P10586
P10587
ST0040
± STARTING (2JZ±GE)STARTER
ST±7
1625 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
1. INSPECT ARMATURE COIL
(a) Check the commutator for open circuit.
Using an ohmmeter, check that there is continuity be-
tween the segments of the commutator.
If there is no continuity between any segment, replace the ar-
mature.
(b) Check the commutator for ground.
Using an ohmmeter, check that there is no continuity be-
tween the commutator and armature coil core.
If there is no continuity, replace the armature.
2. INSPECT COMMUTATOR
(a) Check the commutator for the dirty and burnt surfaces.
If the surface is dirty or burnt, correct it with sandpaper (No.400)
or on a table.
(b) Check for the commutator circle runout.
(1) Place the commutator on V±blocks.
(2) Using a dial gauge, measure the circle runout.
Maximum circle runout: 0.05 mm (0.0020 in.)
If the circle runout is greater than maximum, correct it on a lathe.
(c) Using a vernier caliper, measure the commutator diame-
ter.
Standard diameter: 30.0 mm (1.181 in.)
Minimum diameter: 29.0 mm (1.412 in.)
If the diameter is less than minimum, replace the armature.
(d) Check that the undercut depth is clean and free of foreign
materials. Smooth out the edge.
Standard undercut depth: 0.6 mm (0.024 in.)
Minimum undercut depth: 0.2 mm (0.008 in.)
If the undercut depth is less than minimum, correct it with a
hacksaw blade.

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)