2000 LEXUS GS400 power steering

SR0DP±01
F02563
F02562
A
B
Matchmarks
± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMNSR±17
2187 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. INSTALL DUST COVER
2. INSTALL INTERMEDIATE SHAFT ASSEMBLY
Temporarily tighten the bolt A.
3. INSTALL STEERING COLUMN ASSEMBLY
(a) Torque the 4 column assembly set nuts.
Torque: 25 N´m (260 kgf´cm, 19 ft´lbf)
(b) Tighten the hole cover clamp.
(c) Install the brake pedal return spring.
(d) Connect the connectors.
4. CONNECT INTERMEDIATE SHAFT ASSEMBLY
(a) Align the matchmarks on the intermediate shaft and con-
trol valve shaft.
(b) Torque the bolt B.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
(c) Torque the bolt A.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
5. INSTALL HEATER TO REGISTER DUCT NO.7
6. INSTALL NO.1 SAFETY PAD
(a) Install the 4 pad set bolts and screw.
(b) Install the 2 screws and connect the hood lock release le-
ver to the panel.
7. INSTALL FINISH PLATE AND END PAD
8. INSTALL NO.1 UNDER COVER
(a) Connect the connectors.
(b) Connect the OBD II.
(c) Tighten the 3 screws.
9. INSTALL SPIRAL CABLE
(See page BE±34)
10. INSTALL COMBINATION SWITCH WITH SPIRAL
CABLE
(a) Tighten the 3 screws.
(b) Connect the airbag connector.
(c) Connect the 4 connectors.
11. INSTALL UPPER AND LOWER COLUMN COVERS
Tighten the 3 screws.

F02564Mark
F03676
Torx ScrewScrew Case
SR±18± STEERINGPOWER TILT AND POWER TELESCOPIC STEERING
COLUMN
2188 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
12. CENTER SPIRAL CABLE
(a) Check that the front wheels are facing straight ahead.
(b) Turn the cable counterclockwise by hand until it becomes
harder to turn the cable.
(c) Then rotate the cable clockwise about 3 turns to align the
mark.
HINT:
The cable will rotate about 3 turns to either left or right of the
center.
13. INSTALL STEERING WHEEL
(a) Align the matchmarks on the wheel and main shaft.
(b) Torque the wheel set nut.
Torque: 35 N´m (360 kgf´cm, 26 ft´lbf)
(c) Connect the connector.
14. INSTALL STEERING WHEEL PAD
NOTICE:

Make sure the wheel pad is installed to the specified
torque.

If the wheel pad has been dropped, or there are
cracks, dents or other defects in the case or connec-
tor, replace the wheel pad with a new one.

When installing the wheel pad, take care that the wir-
ings do not interfere with other parts and are not
pinched between other parts.
(a) Connect the airbag connector.
(b) Install the pad after confirming that the circumference
groove of the torx screw is caught on the screw case.
(c) Using a torx socket wrench, torque the 2 screws.
Torque: 8.8 N´m (90 kgf´cm, 78 in.´lbf)
(d) Install the steering wheel lower No.2 and No.3 covers.
15. CHECK STEERING WHEEL CENTER POINT

F02555
Engine Under Cover
x16 Drive BeltPS Vane pump
AssemblyClip
Return Hose
Pressure Feed Tube
Union Bolt

Gasket
58 (590, 43)
49 (500, 36)
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable part
SR0DQ±01
± STEERINGPOWER STEERING VANE PUMP (2JZ±GE)
SR±19
2189 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
POWER STEERING VANE PUMP (2JZ±GE)
COMPONENTS

F02549
Vane Pump Pulley
Vane Pump Shaft
Front HousingSpringFlow Control
Valve
Rear Housing Ware Washer
Cam Ring
x10
Vane Pump RotorVane PlateSide Plate
Gasket

Bearing

Snap Ring
Snap Ring
Oil Seal
O±Ring



O±Ring

Straight PinSolenoid Valve Oil Reservoir

O±Ring
13 (130, 9)
24 (240, 17)
43 (440, 32)
69 (700, 51)
*51 (524, 38)
24 (240, 17)
N´m (kgf´cm, ft´lbf) : Specified torque

Non±reusable part
Power steering fluid
* For use with SST SR±20
± STEERINGPOWER STEERING VANE PUMP (2JZ±GE)
2190 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)

SR0DF±03
SR±2
± STEERINGTROUBLESHOOTING
2172 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 the order shown. If necessary, repair or replace these parts.
SymptomSuspect AreaSee page
Hard steering
3. Tires (Improperly inflated)
4. Power steering fluid level (Low)
5. Drive belt (Loose)
6. Front wheel alignment (Incorrect)
7. Steering system joints (Worn)
8. Suspension arm ball joints (Worn)
9. Steering column (Binding)
10.Power steering gear
11. PPS systemSA±2
SR±4
±
SA±4
±
SA±27
SA±37
±
SR±42
SR±59
Poor return
1. Tires (Improperly inflated)
2. Front wheel alignment (Incorrect)
3. Steering column (Binding)
4. Power steering gearSA±2
SA±4
±
SR±42
Excessive play
1. Steering system joints (Worn)
2. Suspension arm ball joints (Worn)
3. Intermediate shaft, Universal joint, Sliding yoke (Worn)
4. Front wheel bearing (Worn)
5. Power steering gear
6. PPS system±
SA±27
SA±37
±
SA±10
SR±42
SR±59
Abnormal noise
1. Power steering fluid level (Low)
2. Steering system joints (Worn)
3. Power steering gearSR±4
±
SR±42
HINT:
When the problem occurs on the power tilt and telescopic steering system, refer to the DI section.
(See page DI±517)

SR0DR±01
R06091
F02556
± STEERINGPOWER STEERING VANE PUMP (2JZ±GE)
SR±21
2191 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE ENGINE UNDER COVER
Remove the 16 bolts.
2. REMOVE DRIVE BELT
Loosen the drive bolt tension by turning the drive belt tensioner
clockwise, and remove the belt.
3. REMOVE RETURN HOSE
Remove the clip and disconnect the hose.
4. REMOVE PRESSURE FEED TUBE
Remove the union bolt and gasket.
5. REMOVE PS VANE PUMP ASSEMBLY
(a) Disconnect the connector.
(b) Remove the 2 bolts.

SR0DS±01
F02544
F02545
SST
F02547SST
W01277
Vane Pump Press
Vinyl Tape
Front Housing
Oil Seal
Bearing Shaft
SR±22
± STEERINGPOWER STEERING VANE PUMP (2JZ±GE)
2192 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
NOTICE:
When using a vise, do not overtighten it.
1. MEASURE PS VANE PUMP ROTATING TORQUE
(a) Check that the pump rotates smoothly without abnormal
noise.
(b) Using a torque wrench, check the pump rotating torque.
Rotating torque:
0.25 N´m (2.5 kgf´cm, 2.2 in.´lbf) or less
2. REMOVE VANE PUMP PULLEY
Using SST to stop the pulley rotating, remove the pulley set nut.
SST 09960±10010 (09962±01000, 09963±01000)
3. REMOVE OIL RESERVOIR
(a) Remove the 3 bolts and oil reservoir.
(b) Remove the O±ring from the oil reservoir.
4. REMOVE SOLENOID VALVE
(a) Using SST, remove the valve.
SST 09922±10010
NOTICE:
Use SST 09922±10010 in the direction shown in the illustra-
tion.
(b) Remove the O±ring from the valve.
5. REMOVE FLOW CONTROL VALVE AND SPRING
6. REMOVE REAR HOUSING
(a) Remove the 2 bolts.
(b) Remove the 2 O±rings from the housing.
7. REMOVE WAVE WASHER
8. REMOVE SIDE PLATE
9. REMOVE CAM RING, 10 VANE PLATES AND VANE
PUMP ROTOR
NOTICE:
Be careful not to drop the plate.
10. REMOVE STRAIGHT PINS
Remove the 2 pins from the front housing.
11. REMOVE GASKET
12. REMOVE VANE PUMP SHAFT WITH BEARING
(a) Using snap ring pliers, remove the snap ring from the front
housing.
(b) Wind vinyl tape on the serrated part of the vane pump
shaft.
(c) Press out the shaft with the bearing.
NOTICE:
Be careful not to damage the oil seal lip.

SR0DT±01
W01278
Vane Pump Shaft
Front Housing
Bushing
N00372
HeightThickness
Length
R10282
Feeler Gauge
± STEERINGPOWER STEERING VANE PUMP (2JZ±GE)
SR±23
2193 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSPECTION
NOTICE:
When using a vise, do not overtighten it.
1. CHECK OIL CLEARANCE BETWEEN VANE PUMP
SHAFT AND BUSHING
Using a micrometer and caliper gauge, measure the oil clear-
ance.
Standard clearance:
0.03 ± 0.05 mm (0.0012 ± 0.0020 in.)
Maximum clearance: 0.07 mm (0.0028 in.)
If it is more than the maximum, replace the shaft and front hous-
ing.
2. INSPECT VANE PUMP ROTOR AND VANE PLATES
(a) Using a micrometer, measure the height, thickness and
length of the 10 plates.
Minimum height: 8.6 mm (0.339 in.)
Minimum thickness: 1.40 mm (0.0551 in.)
Minimum length: 14.99 mm (0.5902 in.)
(b) Using a feeler gauge, measure the clearance between
the rotor groove and plate.
Maximum clearance: 0.033 mm (0.0013 in.)