belt LEXUS GS400 2000 Service Manual Online

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.

SR0DV±01
F02556
F02557
Stopper
R06091
SR±28
± STEERINGPOWER STEERING VANE PUMP (2JZ±GE)
2198 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
1. INSTALL PS VANE PUMP ASSEMBLY
(a) Torque the 2 bolts.
Torque: 58 N´m (590 kgf´cm, 43 ft´lbf)
(b) Connect the connector.
2. CONNECT PRESSURE FEED TUBE
Torque the union bolt over a new gasket.
HINT:
Make sure that the stopper of the tube is touching the PS vane
pump body, as shown, before torquing the bolt.
Torque: 49 N´m (500 kgf´cm, 36 ft´lbf)
3. CONNECT RETURN HOSE
Connect the hose with the clip.
4. INSTALL DRIVE BELT
Loosen the drive belt tension by turning the drive belt tensioner
clockwise, and install the belt.
5. INSTALL ENGINE UNDER COVER
Tighten the 16 bolts.
6. BLEED POWER STEERING SYSTEM
(See page SR±3)

RS01Z±02
H02570
H02571Spiral Cable
H02572
H02573
H03446
RS±2
± SUPPLEMENTAL RESTRAINT SYSTEMSRS AIRBAG
2233 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
OPERATION
1. STEERING WHEEL PAD (with AIRBAG)
The inflater and bag of the SRS are stored in the steering wheel
pad and cannot be disassembled. The inflater contains a squib,
igniter charge, gas generant, etc., and inflates the bag when
instructed by the airbag sensor assembly.
2. SPIRAL CABLE (in COMBINATION SWITCH)
A spiral cable is used as an electrical joint from the vehicle body
side to the steering wheel.
3. FRONT PASSENGER AIRBAG ASSEMBLY
The inflater and bag of the SRS are stored in the front passen-
ger airbag assembly and cannot be disassembled. The inflater
contains a squib, igniter charge, gas generant, etc., and inflates
the bag when instructed by the airbag sensor assembly.
4. SIDE AIRBAG ASSEMBLY
The inflater and bag of the SRS side airbag are stored in the
side airbag assembly and cannot be disassembled. The inflater
contains a squib, igniter charge, gas generant, etc., and inflates
the bag when instructed by the side airbag sensor assembly.
5. SEAT BELT PRETENSIONER
The seat belt pretensioner system is a component of the front
seat outer belt. The pretensioner contains a squib, gas gener-
ant, wire, piston, etc., and operates in the event of a frontal colli-
sion.

RS07J±02
H11866
Seatback CoverFront Seatback Board
Seat Cushion Assembly
Seat Adjuster
Front Seat Inner
Cushion Cover
Seat Track CoverSeat Track Cover
Reclining Adjuster
Inside Cover LH
Front Seat Cushion ShieldFront Seat Outer Belt
Seat Belt Anchor
Cover Cap Power Seat
Switch KnobSide Airbag Assembly
: Specified torque
N´m (kgf´cm, ft´lbf)

Non±reusable part
Hog Ring
61 (622, 45)
61 (622, 45)
19 (194, 14)
37 (375, 27)
37 (375, 27)
42 (430, 31)
37 (375, 27)37 (375, 27)
19 (194, 14)
19 (194, 14)
Headrest Support Headrest
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
RS±39
2270 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
SIDE AIRBAG ASSEMBLY
COMPONENTS

RS0JC±01
N20339
H03709
RS±40
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
2271 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
NOTICE:

If the wiring connector of the SRS is disconnected
and the ignition switch is in ON or ACC position, DTCs
will be recorded.

Never use the airbag parts from another vehicle.
When replacing parts, replace them with new parts.
1. REMOVE FRONT SEAT OUTER BELT FLOOR AN-
CHOR
(a) Using a screwdriver, remove the seat belt anchor cover
cap.
HINT:
Tape the screwdriver tip before use.
(b) Remove the front seat outer belt floor anchor.
2. REMOVE FRONT SEAT
(a) Using a screwdriver, remove the 4 seat track covers.
HINT:
Tape the screwdriver tip before use.
(b) Remove the 4 bolts, then disconnect the airbag connec-
tor.
NOTICE:
When handling the airbag connector, take care not to dam-
age the airbag wire harness.
(c) Remove the front seat.
3. REMOVE HEADREST
4. REMOVE POWER SEAT SWITCH KNOBS
5. REMOVE FRONT SEAT CUSHION SHIELD
6. REMOVE FRONT SEAT INNER CUSHION COVER
7. REMOVE SIDE AIRBAG ASSEMBLY WIRE HARNESS
(a) Remove the connector from the bracket.
(b) Remove the 5 clamps and wire harness from the seat
cushion frame
8. REMOVE SEAT CUSHION ASSEMBLY
(a) Remove the wire harness from the seat cushion asseml-
by.
(b) Remove the 4 bolts and seat cushion assemlby from the
seat adjuster.

N20339
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG ASSEMBLY
RS±51
2282 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
9. INSTALL FRONT SEAT OUTER BELT FLOOR AN-
CHOR
(a) Install the front seat outer belt floor anchor.
Torque: 42 N´m (430 kgf´cm, 31 ft´lbf)
(b) Install the seat belt anchor cover cap.

RS07Z±01
H02617
Center Pillar Lower Garnish
Front Door Scuff Plate
Rear Door Scuff Plate
Side Airbag
Sensor Assembly
Front Seat
Outer Belt Retractor
41 (420, 30)
7.4 (75, 65 in.´lbf)
20 (200, 14)
: Specified torqueN´m (kgf´cm, ft´lbf)
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG SENSOR ASSEMBLY
RS±63
2294 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
SIDE AIRBAG SENSOR ASSEMBLY
COMPONENTS

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)

RS083±01
H02619
± SUPPLEMENTAL RESTRAINT SYSTEMSIDE AIRBAG SENSOR ASSEMBLY
RS±67
2298 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INSTALLATION
NOTICE:

Never use SRS parts from another vehicle. When re-
placing parts, replace them with new ones.

Never reuse the side airbag sensor assembly in-
volved in a collision when the airbag has deployed.

Never repair a sensor in order to reuse it.
1. INSTALL SIDE AIRBAG SENSOR
(a) Using a torx wrench, install the side airbag assembly with
4 screws.
Torx wrench: T40 (Part No.09042±00020 or locally
manufactured tool)
Torque: 20 N´m (200 kgf´cm, 14 ft´lbf)
(b) Connect the connector.
NOTICE:

Make sure the sensor assembly is installed to the
specified torque.

If the sensor assembly has been dropped, or there are
cracks, dents or other defects in the case, bracket or
connector, replace the sensor assembly with a new
one.

When installing the sensor assembly, take care that
the SRS wiring does not interfere with other parts and
is not pinched between other parts.

After installation, shake the sensor assembly to
check that there is no looseness.
2. INSTALL FRONT SEAT OUTER BELT RETRACTOR
(See page BO±132)
(a) Install the retractor with 2 bolts.
HINT:
After tightening the upper bolt, tighten the lower bolt.
Torque:
Upper bolt: 7.4 N´m (75 kgf´cm, 65 in.´lbf)
Lower bolt: 41 N´m (420 kgf´cm, 30 ft´lbf)
(b) w/ Seat Belt Warning:
Connect the retractor switch connector.
(c) w/ Seat Belt Pretensioner:
Connect the pretensioner connector.
3. INSTALL THESE PARTS:
(a) Center pillar lower garnish
(b) Rear door scuff plate
(c) Front door scuff plate