LEXUS GS400 2000 Service Repair Manual

RS084±01
H02621
Combination Meter
(Warning Light)
Steering Wheel Pad
(with Airbag)
Spiral CableRH Front Airbag SensorFront Passenger Airbag Assembly
RH Side Airbag
Assembly
RH Side Airbag
Sensor Assembly
RH Seat Belt
Pretensioner
Airbag Sensor Assembly LH Side Airbag
Assembly LH Seat Belt
Pretensioner LH Side Airbag
Sensor Assembly LH Front Airbag
Sensor
RS±68
± SUPPLEMENTAL RESTRAINT SYSTEMWIRE HARNESS AND CONNECTOR
2299 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
WIRE HARNESS AND CONNECTOR
LOCATION

RS085±01
± SUPPLEMENTAL RESTRAINT SYSTEMWIRE HARNESS AND CONNECTOR
RS±69
2300 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
HINT:
The SRS wire harness is integrated with the instrument panel wire harness assembly. The wires for the SRS
wire harness are encased in a yellow corrugated tube and all the connectors in the system are a standard
yellow color.
1. VEHICLE NOT INVOLVED IN COLLISION
Do a diagnostic system check.
(See page DI±552)
2. VEHICLE INVOLVED IN COLLISION
(a) Do a diagnostic system check.
(See page DI±552)
(b) Check breaks in all wires of the SRS wire harness, and exposed conductors.
(c) Check to see if the SRS wire harness connectors are cracked or chipped.

RS086±01
RS±70
± SUPPLEMENTAL RESTRAINT SYSTEMWIRE HARNESS AND CONNECTOR
2301 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REPLACEMENT
In the following cases,replace the wire harness or connector.

If any part of the SRS wire harness or any connector has been found to be faulty in troubleshoot-
ing.

If any part of the SRS wire harness or any connector has been found to be faulty during the check
in items. (See page RS±69)
CAUTION:
If the wire harness used in the SRS is damaged, replace the whole wire harness assembly.

SA0R1±03
± SUSPENSION AND AXLETROUBLESHOOTING
SA±1
2001 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TROUBLESHOOTING
PROBLEM SYMPTOMS TABLE
Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely
cause of the problem. Check each part in order. If necessary, replace these parts.
SymptomSuspect AreaSee page
Wander/pulls
5. Tires (Worn or improperly inflated)
6. Wheel alignment (Incorrect)
7. Steering linkage (Loosen or worn)
8. Hub bearings (Loosen or worn)
9. Steering gear (Out of adjustment or broken)
10.Suspension parts (Worn out)SA±2
SA±4
SA±7
±
SA±9
SA±43
±
±
Bottoming
1. Vehicle (Overloaded)
2. Spring (Weak)
3. Shock absorber (Worn out)±
SA±17
SA±86
SA±21
SA±89
Sways/pitches
1. Tires (Worn or improperly inflated)
2. Stabilizer bar (Bent or broken)
3. Shock absorber (Worn out)SA±2
SA±39
SA±105
SA±21
SA±89
Front wheel shimmy
1. Tires (Worn or improperly inflated)
2. Wheels (Out of balance)
3. Shock absorber (Worn out)
4. Wheel alignment (Incorrect)
5. Ball joints (Worn)
6. Hub bearings (Loosen or worn)
7. Steering linkage (Loosen or worn)
8. Steering gear (Out of adjustment or broken)SA±2
SA±2
SA±21
SA±4
SA±34
SA±9
±
±
Abnormal tire wear
1. Tires (Improperly inflated)
2. Wheel alignment (Incorrect)
3. Suspension parts (Worn out)
4. Shock absorber (Worn out)SA±2
SA±4
SA±7
±
SA±21
SA±89
Noise in rear differential
1. Oil level (Low or wrong grade)
2. Excessive backlash between pinion and ring gear
3. Ring, pinion or side gears (Worn or chipped)
4. Pinion shaft bearing (Worn)
5. Side bearing (Worn)SA±61
SA±63
SA±63
SA±63
SA±63
Oil leak from rear differential
1. Oil level (Too high or wrong grade)
2. Drive pinion oil seal (Worn or damaged)
3. Side gear oil seal (Worn or damaged)
4. Companion flange (Loose or damaged)
5. Side gear shaft (Damaged)SA±61
SA±63
SA±60
SA±67
SA±63

SA0R6±01
F02311
R11097
F02313
SST
SA±10
± SUSPENSION AND AXLEFRONT AXLE HUB
2010 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE FRONT WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
2. REMOVE FRONT BRAKE CALIPER AND DISC
(a) Remove the 2 bolts and brake caliper from the steering
knuckle.
Torque: 118 N´m (1,200 kgf´cm, 87 ft´lbf)
(b) Support the brake caliper securely.
(c) Remove the disc.
3. CHECK BEARING BACKLASH AND AXLE HUB
DEVIATION
(a) Using a dial indicator near the center of the axle hub and
check the backlash in the bearing shaft direction.
Maximum: 0.05 mm (0.0020 in.)
If the blacklash exceeds the maximum, replace the bearing.
(b) Using a dial indicator, check the deviation at the surface
of the axle hub outside the hub bolt.
Maximum: 0.05 mm (0.0020 in.)
If the deviation exceeds the maximum, replace the axle hub.
4. REMOVE ABS SPEED SENSOR
Remove the bolt and ABS speed sensor.
Torque: 7.8 N´m (80 kgf´cm, 69 in.´lbf)
5. REMOVE STEERING KNUCKLE
(a) Remove the upper side of the clip and nut.
Torque: 87 N´m (890 kgf´cm, 64 ft´lbf)
(b) Using SST, remove the steering knuckle from the upper
suspension arm.
SST 09610±20012

F02314
± SUSPENSION AND AXLEFRONT AXLE HUB
SA±11
2011 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(c) Remove the 2 bolts and steering knuckle from the lower
ball joint.
Torque: 113 N´m (1,150 kgf´cm, 83 ft´lbf)

SA0SV±01
SA±100
± SUSPENSION AND AXLEREAR LOWER SUSPENSION ARM
2100 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
Installation is in the reverse order of removal (See page SA±98).
AFTER INSTALLATION, CHECK REAR WHEEL ALIGNMENT (See page SA±7)

SA0SW±01
F03427
ABS Speed Sensor
Wire HarnessToe Control
LinkFender Apron Seal
N´m (kgf´cm, ft´lbf)
: Specified torque
49 (500, 36)
5.4 (55, 48 in.´lbf)
59 (600, 44)
± SUSPENSION AND AXLETOE CONTROL LINK
SA±101
2101 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TOE CONTROL LINK
COMPONENTS

SA0SX±01
F02390
SST
F02391
Matchmarks SA±102
± SUSPENSION AND AXLETOE CONTROL LINK
2102 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE REAR WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
2. REMOVE REAR FENDER APRON SEAL
3. DISCONNECT ABS SPEED SENSOR WIRE HARNESS
FROM TOE CONTROL LINK
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
4. REMOVE TOE CONTROL LINK
(a) Remove the nut.
Torque: 59 N´m (600 kgf´cm, 44 ft´lbf)
HINT:
At the time of installation, after stabilizing the suspension,
torque the nut.
(b) Using SST, disconnect the toe control link from the axle
carrier.
SST 09610±20012
NOTICE:
Be careful not to damage the dust cover.
(c) Place the matchmarks on the adjusting cam and suspen-
sion member.
(d) Remove the nut, adjusting cam No.2, adjusting cam No.1
and the toe control link.
Torque: 49 N´m (500 kgf´cm, 36 ft´lbf)
HINT:
At the time of installation, after stabilizing the suspension,
torque the nut.

SA0SY±01
F01992
± SUSPENSION AND AXLETOE CONTROL LINK
SA±103
2103 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
INSPECT BALL JOINT FOR ROTATION CONDITION
(a) As shown, flip the ball joint stud back and forth 5 times,
before installing the nut.
(b) Using a torque wrench, turn the nut continuously one turn
per 2 ± 4 seconds and take the torque reading on the 5th
turn.
Turning torque:
1.0 ± 2.5 N´m (10 ± 25 kgf´cm, 9 ± 22 in.´lbf)