ABS LEXUS GS400 2000 Service Owner's Guide

SS0FE±01
± SERVICE SPECIFICATIONSSUSPENSION AND AXLE
SS±53
209 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TORQUE SPECIFICATION
Part tightenN´mkgf´cmft´lbf
FRONT
Hub nut1031,05076
Brake caliper x Steering knuckle11 81,20087
ABS speed sensor x Steering knuckle7.88069 in.´lbf
Steering knuckle x Upper suspension arm8789064
Lower ball joint x Steering knuckle11 31,15083
Brake dust cover x Steering knuckle8.38574 in.´lbf
ABS speed sensor wire harness x Shock absorber5.05548 in.´lbf
Stabilizer bar x Stabilizer bar link5556041
Shock absorber bracket x Shock absorber1571,60011 6
Piston rod x Suspension support No.22728020
Suspension support No.1 x Body5657041
Upper suspension arm x Body5354039
Stabilizer bar link x No.2 lower suspension arm11 31,15083
Height control link x Shock absorber bracket5.45548 in.´lbf
No.2 lower suspension arm x No.1 lower suspension arm2452,500180
No.2 lower suspension arm x Lower ball joint1621,65011 9
Strut bar bracket x Body A
B58
152590
1,55043
11 2
No.2 lower suspension arm x Body9597070
Shock absorber bracket x No.2 lower suspension arm2525018
Tie rod end x Lower ball joint8789064
Stabilizer bar bracket x Body2829021
Tie rod end lock nut5657041
Axle hub lock nut1992,030147

SS±54
± SERVICE SPECIFICATIONSSUSPENSION AND AXLE
210 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)Part tighten
N´mkgf´cmft´lbf
REAR
Hub nut1031,05076
Brake caliper x Axle carrier1041,06577
Axle carrier x Upper suspension arm1081,10080
Backing plate x Axle carrier5960043
Drive shaft x Axle hub2892,950213
No.2 lower suspension arm x Axle carrier11 01,12081
No.1 lower suspension arm x Axle carrier7576555
Drive shaft x Differential side gear shaft6869550
Differential drain plug4950039
Differential filler plug4950039
Differential mounting boltFront
Rear123
1421,250
1,45090
105
Ring gear set boltSee page SA±73
Companion flange lock nutSee page SA±73
Differential carrier retainer set bolt2222516
Differential carrier cover set bolt4747534
Breather plug2121015
Suspension support x Body Upper side
Lower side64
18650
18547
13
Piston rod x Suspension support2728020
Upper suspension arm x Body8890065
No.1 lower suspension arm x Body7576555
No.2 lower suspension arm x Stabilizer bar link x Height control sensor link3030522
No.2 lower suspension arm x Shock absorber11 01,12081
No.2 lower suspension arm x Body11 01,12081
ABS speed sensor wire harness x Toe control link5.45548 in.´lbf
Toe control link x Axle carrier5960044
Toe control link x Body5960044
Stabilizer bar x Stabilizer bar link6566048
Stabilizer bar bracket x Body1818513
ABS speed sensor x Axle carrier7.88069 in.´lbf
Parking brake cable x Backing plate7.88069 in.´lbf
Suspension member brace x Body5051037
Differential x Propeller shaft7980558
Oil deflector x Differential carrier cover7.07062 in.´lbf

RS07Q±01
H02616
± SUPPLEMENTAL RESTRAINT SYSTEMAIRBAG SENSOR ASSEMBLY
RS±53
2284 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
NOTICE:
Do not open the cover or the case of the ECU and various
computers unless absolutely necessary.
(If the IC terminals are touched, the IC may be destroyed by
static electricity.)
1. REMOVE THESE PARTS:
(See page BO±91)
(a) Finish plate
(b) End Pad
(c) No.1 under cover
(d) Hood lock release lever
(e) No.1 safety pad
(f) No.2 under cover
(g) Glove compartment finish plate
(h) Glove compartment panel assembly
(i) Front ash receptacle
(j) Cluster finish panel
(k) Console box carpet
(l) Accessary socket
(m) Accessary case
(n) Lower rear console box
(o) Rear console armrest
(p) Console box register
(q) Console box
(r) No.3 console box mounting bracket
(s) No.1 console box duct
2. REMOVE AIRBAG SENSOR ASSEMBLY
(a) Disconnect the airbag sensor connectors.
NOTICE:
Remove the connectors with the sensor assembly
installed.
(b) Using a torx wrench, remove the 3 screws and airbag sen-
sor assembly.
Torx wrench: T40 (Part No.09042±00020 or locally
manufactured tool)

RS080±01
H02619
H02620
RS±64
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG SENSOR ASSEMBLY
2295 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
NOTICE:
Do not open the cover or the case of the ECU and various
computers unless absolutely necessary.
(If the IC terminals are touched, the IC may be destroyed by
static electricity.)
1. REMOVE THESE PARTS:
(a) Front door scuff plate
(b) Rear door scuff plate
(c) Center pillar lower garnish
2. REMOVE FRONT SEAT OUTER BELT RETRACTOR
(See page BO±124)
(a) w/ Seat Belt Pretensioner:
Disconnect the pretensioner connector.
(b) w/ Seat Belt Warning:
Disconnect the retractor switch connector.
(c) Remove the 2 bolts and retractor.
3. REMOVE SIDE AIRBAG SENSOR ASSEMBLY
(a) Disconnect the connector.
NOTICE:
Remove the connector with the sensor assembly installed.
(b) Using a torx wrench, remove the 4 screws and side airbag
sensor assembly.
Torx wrench: T40 (Part No.09042±00020 or locally
manufactured tool)

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

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.

SA0R7±05
R05806
R11093
SST
R11078
SST SA±12
± SUSPENSION AND AXLEFRONT AXLE HUB
2012 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE FRONT HUB GREASE CAP
Using a screwdriver, remove the grease cap from the steering
knuckle.
2. REMOVE FRONT AXLE HUB LOCK NUT AND ABS
SPEED SENSOR ROTOR
(a) Clamp the axle hub in a soft jaw vise.
HINT:
Close vise until it holds hub bolt. Do not tighten further.
(b) Using a chisel and hammer, loosen the staked part of the
lock nut.
(c) Using a 36 mm socket wrench, remove the lock nut.
(d) Remove the ABS speed sensor rotor.
NOTICE:
Take care not to scratch the serrations of the sensor rotor.
3. REMOVE AXLE HUB FROM STEERING KNUCKLE
(a) Remove the 4 bolts and shift the brake dust cover toward
the outside.
(b) Using SST, remove the axle hub from the steering
knuckle.
SST 09950±40011 (09951±04020, 09952±04010,
09953±04020, 09954±04010, 09955±04051,
09957±04010, 09958±04011)
4. REMOVE INNER RACE (OUTSIDE) FROM AXLE HUB
Using SST, remove the inner race from the axle hub.
SST 09950±40011 (09951±04020, 09952±04010,
09953±04020, 09954±04010, 09955±04061,
09957±04010, 09958±04011)

SA0R8±01
W00274
SST
SST
R06214
SST
R08018
SST
SST SA±14
± SUSPENSION AND AXLEFRONT AXLE HUB
2014 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REASSEMBLY
1. INSTALL BEARING
(a) Using SST and a press, install a new bearing to steering
knuckle.
SST 09309±36010, 09950±60020 (09951±00720),
09950±70010 (09951±07150)
NOTICE:
If the inner race and balls come loose from the bearing out-
er race, make sure to install them on the same side as be-
fore.
(b) Using snap ring pliers, install a new snap ring.
2. INSTALL OIL SEAL
(a) Install the inner race (outside).
(b) Using SST and a hammer, install a new oil seal until it is
flush with the end surface of the steering knuckle.
SST 09608±32010
(c) Coat MP grease to the oil seal lip.
3. INSTALL AXLE HUB TO STEERING KNUCKLE
(a) Install the brake dust cover to the steering knuckle with
the 4 bolts.
Torque: 8.3 N´m (85 kgf´cm, 74 in.´lbf)
(b) Using SST and a press, install the axle hub to the steering
knuckle.
SST 09316±60011 (09316±00011, 09316±00071),
09608±32010
4. INSTALL ABS SPEED SENSOR ROTOR
NOTICE:
Do not scratch the serrations of the sensor rotor.
5. INSTALL AXLE HUB LOCK NUT
(a) Install a new axle hub lock nut.
Torque: 199 N´m (2,030 kgf´cm, 147 ft´lbf)
(b) Using a chisel and hammer, stake the lock nut.
6. INSTALL FRONT HUB GREASE CAP
Using a screwdriver and hammer, install the grease cap to the
steering knuckle.