suspension LEXUS RX330 2006 Owner's Manual

IN CASE OF AN EMERGENCY
501
CAUTION
When jacking, be sure to observe the following
to reduce the possibility of personal injury:
Follow jacking instructions.
 Do not put any part of your body under a
vehicle supported by a jack. Otherwise,
personal injury may occur.
 Do not start or run the engine while your
vehicle is supported by the jack.
 Stop the vehicle on a level firm ground, firmly
set the parking brake and put the
transmission in “P”. Block the wheel
diagonally opposite to the one being changed
if necessary.
Make sure to set the jack properly in the jack
point. Raising the vehicle with jack
improperly positioned will damage the vehicle
or may allow the vehicle to fall off the jack
and cause personal injury.
 Never get under the vehicle when the vehicle
is supported by the jack alone.
 Use the jack only for lifting your vehicle
during wheel changing.
 Do not raise the vehicle with someone in the
vehicle.
 When raising the vehicle, do not place any
objects on top of or underneath the jack.
 Raise the vehicle only high enough to remove
and change the tire.
 Vehicles with electronically modulated air
suspension: When jacking up, be sure to turn
off the height control and stop the engine.
Otherwise, the vehicle height may change in
the automatic leveling function, resulting in
an unexpected accident. For details, see
page 446.

IN CASE OF AN EMERGENCY
516TOWING PRECAUTIONS:
Use a safety chain system for all towing, and abide by the
state/provincial and local laws. The wheels and axle on the
ground must be in good condition. If they are damaged, use
a towing dolly.
CAUTION
Vehicles with electronically modulated air suspension:
When
your vehicle is towed, put the vehicle height in the
“N” (normal) mode and push the height control switch
to turn off the electronically modulated air suspension.
Otherwise, the vehicle height may be changed in the
automatic leveling function, resulting in an unexpected
accident. For details, see “Electronically modulated air
suspension” on page 437.
(a) Towing with a wheel lift type truck
 From front
 Twowheel drive models
Release the parking brake.
NOTICE
When lifting wheels, take care to ensure adequate
ground clearance for towing at the opposite end of the
raised vehicle. Otherwise, the bumper and/or
underbody of the towed vehicle will be damaged during
towing.

MAINTENANCE
532
Tire inflation pressure
Check the pressure with a gauge every two weeks,
or at least once a month and adjust as shown on the
tire and loading information label. See page 570 for
additional information.
Tire surface
Check the tires carefully for cuts, damage or
excessive wear. See page 585 for additional
information.
Tire rotation
Rotate the tires according to the maintenance
schedule. (For scheduled maintenance information,
please refer to the “Owner’s Manual Supplement /
Scheduled Maintenance”.) See “Rotating tires” on
page 584.DOES YOUR VEHICLE NEEDREPAIRING?
Be on the alert for changes in performance and sounds, and
visual tip −offs that indicate service is needed. Some important
clues are:
 Engine missing, stumbling, or pinging
 Appreciable loss of power
 Strange engine noises
 A fluid leak under the vehicle (However, water dripping from
the air conditioning after use is normal.)
 Change in exhaust sound (This may indicate a dangerous
carbon monoxide leak. Drive with the windows open and
have the exhaust system checked immediately.)
 Flat−looking tires, excessive tire squeal when cornering,
uneven tire wear
 Vehicle pulls to one side when driving straight on a level
road
 Strange noises related to suspension movement
 Loss of brake effectiveness, spongy feeling brake pedal,
pedal almost touches floors, vehicle pulls to one side when
braking
 Engine coolant temperature continually higher than normal
If you notice any of these clues, take your vehicle to your Lexus
dealer as soon as possible. It probably needs adjustment or
repair.

INTRODUCTION
546
When raising the vehicle, do not place any objects on
top of or underneath the jack.
 Vehicles with electronically modulated air
suspension: When jacking up, be sure to turn off the
height control and stop the engine. Otherwise, the
vehicle height may change in the automatic leveling
function, resulting in an unexpected accident. For
details, see page 446.
NOTICE
Make sure to place the jack correctly, or your vehicle
may be damaged.

SECTION 6 – 3
563
SERVICE PROCEDURES AND
SPECIFICATIONS
Chassis
Specifications564
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . .
Checking brake fluid 568
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
.
Checking power steering fluid 569
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking tire inflation pressure 570
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Information 573
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . .
Types of tires 583
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . .
Rotating tires 584
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . . . . . .
Checking and replacing tires 585
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing snow tires and chains 587
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing wheels 590
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .\
. . .
Aluminum wheel precautions 591
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension and chassis 591
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHASSIS
589
Regulations regarding the use of tire chains vary
according to location or type of road. Always check local
regulations before installing chains.
NOTICE
If the wrong combination of tire and chain is used, the
chains could damage the vehicle body.
Chain installation
Install the chains on the front tires as tightly as possible.
Do not use tire chains on the rear tires. Retighten chains
after driving 0.5 — 1.0 km (1/4 — 1/2 mile).
When installing chains on your tires, carefully follow the
instructions of the chain manufacturer.
CAUTION

Do not exceed 50 km/h (30 mph) or the chain
manufacturer’s recommended speed limit,
whichever is lower.
 Drive carefully avoiding bumps, holes, and sharp
turns, which may cause the vehicle to bounce.
 Avoid sharp turns or lockedwheel braking, as use of
chains may adversely affect vehicle handling.
 When driving with chains installed, be sure to drive
carefully. Slow down before entering curves to avoid
losing control of the vehicle. Otherwise an accident
may occur.
 Vehicles with electronically modulated air
suspension: When installing the tire chains, be sure
to turn off the height control and stop the engine.
Otherwise, the vehicle height may change in the
automatic leveling function, resulting in an
unexpected accident. For details, see page 446.
If the chains are installed, the tire pressure warning
system may not operate properly. See “Tire pressure
warning system” on page 462.

CHASSIS
591
ALUMINUM WHEEL PRECAUTIONS
When installing aluminum wheels, check that the wheel nuts
are tight after driving your vehicle the first 1600 km (1000
miles).
 If you have rotated, repaired, or changed your tires, check
that the wheel nuts are still tight after driving 1600 km (1000
miles).
 When using tire chains, be careful not to damage the
aluminum wheels.
 Use only Lexus wheel nuts and wrench designed for your
aluminum wheels.
 When balancing your wheels, use only Lexus balance
weights or equivalent and a plastic or rubber hammer.
 As with any wheel, periodically check your aluminum
wheels for damage. If damaged, replace immediately.
SUSPENSION AND CHASSIS
CAUTION
Do not modify the suspension/chassis with lift kits,
spacers, springs, etc. It can cause dangerous handling
characteristics, resulting in loss of control.

ELECTRICAL COMPONENTS
594
SPECIFICATIONS
— FUSE LOCATIONS
1Engine compartment
2 3 Driver’s side instrument panel— FUSES

Engine compartment
(with electronically modulated air suspension)

ELECTRICAL COMPONENTS
595
Engine compartment
(without electronically modulated air suspension)
64RY043
Driver’s side instrument panel

ELECTRICAL COMPONENTS
596
No.FUSEAMPERECIRCUIT
1 AIRSUS60Electronically modulated air
suspension
2 INPJ/B100
All components in “HEATER”,
“H−LP CLN”, “TAIL”, “PANEL”,
“FR FOG”, “CIG”, “RADIO NO.
2”, “ECU− ACC”, “PWR OUTLET
NO. 1”, “GAUGE NO. 1”,
“ECU− IG NO. 1”,“ FR WIP”, “RR
WIP”, “WASHER”, “SEAT HTR”,
“ECU− IG NO. 2”, “P/SEAT”,
“PWR”, “TI&TE”, “RR DOOR
LH”, “RR DOOR RH”, “MPX− B”,
“AM1”, “DOOR NO. 2”, “STOP”,
“OBD”, “FUEL OPN”, “AIRSUS”
(7.5 A), “S/ROOF”, “FR DEF”
and “RR FOG” fuses
No.FUSEAMPERECIRCUIT
3 ALT140
All components in “INP −J/B”,
“AIRSUS” (60 A), “ABS NO. 1”,
“ABS NO. 2”, “RDI FAN”, “RR
DEF”, “HEATER”, “PBD”, “H −LP
CLN/MSB”, “H− LP CLN”, “PWR
OUTLET NO. 2”, “TOWING”,
“TAIL”, “PANEL”, “FR FOG”,
“CIG”, “RADIO NO. 2”,
“ECU− ACC”, “PWR OUTLET
NO. 1”, “GAUGE NO. 1”,
“ECU− IG NO. 1”, “FR WIP”, “RR
WIP”, “WASHER”, “HEATER”,
“SEAT HTR”, “ECU −IG NO. 2”,
“P/SEAT”, “PWR”, “TI&TE”, “RR
DOOR LH”, “RR DOOR RH”,
“MPX− B”, “AM1”, “DOOR NO.
2”, “STOP”, “OBD”, “FUEL
OPN”, “AIRSUS” (7.5 A),
“S/ROOF”, “FR DEF” and “RR
FOG” fuses
4 PBD30Power back door
5 HLP
CLN/MSB30Headlight cleaner
6 HLP CLN30Headlight cleaner