wheel size LEXUS RX330 2006 Owners Manual

OCCUPANT RESTRAINT SYSTEMS
167
The front seat belt pretensioner system mainly consists of the
above components, and their locations are shown in the
illustration.
The front seat belt pretensioners are controlled by the airbag
sensor assembly. The airbag sensor assembly consists of a
safing sensor and airbag sensor.
When the front seat belt pretensioners are activated, an
operating
noise may be heard and a small amount of non −toxic
gas may be released. This does not indicate that a fire is
occurring. This gas is normally harmless.
Once the front seat belt pretensioners have been activated, the
seat belt retractors remain locked.
CAUTION
 Do not modify, remove, strike or open the seat belt
pretensioner assemblies, airbag sensor or
surrounding area or wiring. Failure to follow these
instruction may prevent the seat belt pretensioners
from activating correctly, cause sudden operation of
the system or disable the system, which could result
in death or serious injury. Consult your Lexus dealer
about any repair and modification.
 Do not modify or change the suspension system.
Such changes may cause the curtain shield airbags
to inflate accidentally, which could result in death or
serious injury . Consult your Lexus dealer about any
repair and modification.
 Do not use tires or wheels other than the
manufacture’s recommended size. Such a use may
cause the curtain shield airbags and seat belt
pretensioners to inflate accidentally, which could
result in death or serious injury. For details, see
“Checking and replacing tires” on page 585.
 Do not place luggage heavier than specified on the
roof luggage carrier. Such luggage may cause the
curtain shield airbags and seat belt pretensioners to
inflate accidentally, which could result in death or
serious injury. For details, see “Roof luggage
carrier” on page 136.

OCCUPANT RESTRAINT SYSTEMS
189
Do not attach a microphone or any other device or
object around the area where the curtain shield
airbag activates such as on the windshield glass,
side door glass, front and rear pillars, roof side rail
and assist grips. When the curtain shield airbag
inflates, the microphone or other device or object will
be thrown away with great force or the curtain shield
airbag may not activate correctly, resulting in death
or serious injury.
 Do not hook a hanger , heavy or sharp pointed objects
on the coat hook. If the curtain shield airbag inflates,
those items will be thrown away with great force or
the curtain shield airbag may not activate correctly,
resulting in death or serious injury. When you hang
clothes, hang them on the coat hook directly.
 Do not use seat accessories which cover the parts
where the side airbags inflate. Such accessories may
prevent the side airbags from activating correctly,
causing death or serious injury.
 Do not modify or replace the seats or upholstery of
the seats with side airbags. Such changes may
prevent the side airbag system from activating
correctly, disable the system or cause the side
airbags to inflate accidentally, resulting in death or
serious injury.
 Do not disassemble or repair the front and rear pillars
and roof side rail containing the curtain shield
airbags. Such changes may disable the system or
cause the curtain shield airbags to inflate
accidentally, resulting in death or serious injury.
 Do not modify or change the suspension system.
Such changes may cause the curtain shield airbags
to inflate accidentally, which could result in death or
serious injury . Consult your Lexus dealer about any
repair and modification.
 Do not use tires or wheels other than the
manufacture’s recommended size. Such a use may
cause the curtain shield airbags and seat belt
pretensioners to inflate accidentally, which could
result in death or serious injury. For details, see
“Checking and replacing tires” on page 585.

STARTING AND DRIVING
456
CAUTION
Do not rely excessively on the vehicle stability
control system. Even if the vehicle stability control
system is operating, you must always drive carefully
and attentively to avoid serious injury. Reckless
driving will result in an unexpected accident. If the
slip indicator light blinks, sounding an alarm, special
care should be taken while driving.
 Only use tires of specified size. The size,
manufacturer, brand and tread pattern for all 4 tires
should be the same. If you use the tires other than
specified, or different type or size, the vehicle
stability control system may not function correctly.
When replacing the tires or wheels, contact your
Lexus dealer.
 In situations where the road surface is covered with
ice or snow, your vehicle should be fitted with snow
tires or tire chains.
 Slip indicator light
If the vehicle is going to skid during driving, the slip indicator
light blinks and an alarm sounds intermittently. Special care
should be taken while driving.
The slip indicator light comes on for a few seconds when the
ignition key is turned to “ON”. If the indicator light does not
come on when the ignition is turned on, contact your Lexus
dealer.

STARTING AND DRIVING
460
Antilock brake system is not designed to shorten the
stopping distance: Always drive at a moderate speed
and maintain a safe distance from the vehicle in front of
you. Compared with vehicles without an antilock
brake system, your vehicle may require a longer
stopping distance in the following cases:
Driving on rough, gravel or snowcovered roads.
 Driving with tire chains installed.
 Driving over the steps such as the joints on the road.
 Driving on roads where the road surface is pitted or
has other differences in surface height.
Install all 4 tires of specified size at appropriate
pressure: The antilock brake system detects vehicle
speeds u sing the speed sensors for respective wheels’
turning speeds. The use of tires other than specified
may fail to detect the accurate turning speed resulting
in a longer stopping distance.“ABS” warning light
1U.S.A.2Canada
The light comes on when the ignition key is turned to the “ON”
position. If the anti−lock brake system and the brake assist
system work properly, the light turns off after a few seconds.
Thereafter, if either of the systems malfunctions, the light
comes on again.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti −lock brake system, the brake
assist system, the traction control system and the vehicle
stability control system do not operate, but the brake system
still operates conventionally.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti−lock brake system does not
operate so that the wheels could lock up during a sudden
braking or braking on slippery road surfaces.

STARTING AND DRIVING
463
Low tire pressure warning light
This light comes on when the ignition key is turned to the “ON”
position. It goes off after a few seconds. This indicates that the
tire pressure warning system is functioning properly.
If the low tire pressure warning light comes on or blinks
while driving, do the following.
 If the warning light comes on: The tire pressure is critically
low. Adjust the tire inflation pressure to the specified level
as soon as possible. (See “Tires and wheels” on page 566.)
Once the ignition switch is turned off, the warning light also
goes off. If the light comes on again when the vehicle is started
after adjusting tire inflation pressure to the specified level, have
the system checked at your Lexus dealer. If you have a flat tire, replace it with the spare tire. For details,
see “If you have a flat tire” on page 500.

If the warning light blinks once every second: The low
tire pressure warning system may be malfunctioning.
Contact your Lexus dealer.
 If the warning light blinks twice every second: The low
tire pressure warning system needs to be initialized. Reset
the system with the tire pressure warning system reset
switch. (To reset the system, see “Tire pressure warning
system reset switch”.)
The tire pressure warning system does not function
properly under certain circumstances. In the following
cases, the low tire pressure warning light may not come
on even if the tire inflation pressure is low, or it may come
on when the tire inflation pressure is actually normal.
 A compact spare tire, snow tires, or tire chains are used.
 The tire inflation pressure is excessively higher than
specified, or tire inflation pressure suddenly drops due to
bursting or other causes.
 The vehicle is driven on a slippery road surface such as
rough or frozen roads.
 The vehicle speed is less than 30 km/h (19 mph) or more
than 100 km/h (62 mph), and the driving duration is less than
5 minutes.
 The tires differ in tread pattern or manufacturer.
 The tires are not the specified size.

CHASSIS
566
— TIRES AND WHEELS (type A)Tire size
225/65R17 101S
Tire inflation pressure Recommended cold tire inflation
pressure
Front 210 kPa (2.1 kgf/cm2 or bar, 30 psi)
Rear 210 kPa (2.1 kgf/cm2 or bar, 30 psi)
Spare 210 kPa (2.1 kgf/cm2 or bar, 30 psi)
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add 10
kPa (0.1 kgf/cm
2 or bar, 1.5 psi) to the front tires and rear
tires, but never exceed the maximum cold tire pressure
molded on the tire sidewall.
Wheel size17  6 1/2 J
Wheel nut torque103 N·m (10.5 kgf·m, 76 ft·lbf)
NOTE:
For complete information on tires (e.g. replacing tires or replacing wh\
eels), see “Checking tire inflation pressure”
through “Aluminum wheel precautions” on pages 570 through 591.

CHASSIS
567
— TIRES AND WHEELS (type B)Tire size
P235/55R18 99V
Tire inflation pressure Recommended cold tire inflation
pressure
Front 210 kPa (2.1 kgf/cm2 or bar, 30 psi)
Rear 210 kPa (2.1 kgf/cm2 or bar, 30 psi)
Spare 210 kPa (2.1 kgf/cm2 or bar, 30 psi)
Wheel size18 x 7 JJ
Wheel nut torque103 N·m (10.5 kgf·m, 76 ft·lbf)
NOTE:
For complete information on tires (e.g. replacing tires or replacing wh\
eels), see “Checking tire inflation pressure”
through “Aluminum wheel precautions” on pages 570 through 591.

CHASSIS
575
DOT and Tire Identification Number (TIN)
The illustration indicates typical DOT and Tire
Identification Number (TIN).
1“DOT” symbol
2Tire Identification Number (TIN)
3Tire manufacturer’s identification mark
4Tire size code
5Manufacturer’s optional tire type code
(3 or 4 letters)
6Manufacturing week
7Manufacturing year
The “DOT” symbol certifies that the tire conforms to
applicable Federal Motor Vehicle Safety Standards.
Tire size
 The illustration indicates typical tire size.
1Tire use (P=Passenger car, T=Temporary
use)
2Section width (in millimeters)
3Aspect ratio (tire height to section width)
4Tire construction code
(R=Radial, D=Diagonal)
5Wheel diameter (in inches)
6Load index (2 digits or 3 digits)
7Speed symbol (alphabet with one letter)

CHASSIS
580
Tire related termMeaning
Normal occupant
weight68 kg (150 lb.) times the number of occupants specified in the second \
column of
Table 1 that follows
Occupant distributiondistribution of occupants in a vehicle as specified in the third column \
of Table 1
that follows
Production options
weightthe combined weight of those installed regular production options weighi\
ng over
2.3 kg (5 lb.) in excess of those standard items which they replace, n\
ot
previously considered in curb weight or accessory weight, including heav\
y duty
brakes, ride levelers, roof rack, heavy duty battery, and special trim
Recommended
inflation pressurecold tire inflation pressure recommended by a manufacturer
Rima metal support for a tire or a tire and tube assembly upon which the ti\
re beads
are seated
Rim diameter (Wheel
diameter)nominal diameter of the bead seat
Rim size designationrim diameter and width
Rim type designationthe industry of manufacturer’s designation for a rim by style or code
Rim widthnominal distance between rim flanges

CHASSIS
583
TYPES OF TIRES
Determine what kind of tires your vehicle is originally
equipped with.
1. Summer tires
Summer tires are high−speed capability tires best
suited to highway driving under dry conditions.
Since summer tires do not have the same traction
performance as snow tires, summer tires are
inadequate for driving on snow−covered or icy roads.
For driving on snow −covered or icy roads, we
recommend using snow tires. If installing snow tires,
be sure to replace all four tires.
2. All season tires
All season tires are designed to provide better traction
in snow and to be adequate for driving in most winter
conditions, as well as for use all year round. All season tires, however, do not have adequate
traction performance compared with snow tires in
heavy or loose snow. Also, all season tires fall short
in acceleration and handling performance compared
with summer tires in highway driving.
The details about how to distinguish summer tires
from all season tires are described on page 573.
CAUTION

Do not mix summer and all season tires on
your vehicle as this can cause dangerous
handling characteristics, resulting in loss of
control.
 Do not use tires other than the manufacturer’s
designated tires, and never mix tires or
wheels of the sizes different from the
originals.