2006 LEXUS RX330 suspension

DRIVING TIPS
473
After driving through tall grass, mud, rock, sand,
rivers, etc., check that there is no grass, bush, paper,
rags, stone, sand, etc. adhering or trapped on the
underbody. Clear off any such matter from the
underbody. If the vehicle is used with these materials
trapped or adhering to the underbody, a breakdown
or fire could occur.
 In a rollover crash, an unbelted person is
significantly more likely to die than a person wearing
a seat belt. Therefore, the driver and all passengers
should fasten their seat belts whenever the vehicle is
moving.
 When driving offroad or in rugged terrain, do not
drive at excessive speeds, jump, make sharp turns,
strike objects, etc. This may cause loss of control or
vehicle rollover causing death or serious injury. You
are also risking expensive damage to your vehicle’s
suspension and chassis.NOTICE
 If driving through water, such as when crossing
shallow streams, first check the depth of the water
and the bottom of the river bed for firmness. Drive
slowly and avoid deep water.
 Take all necessary safety measures to ensure that
water damage to the engine or other components
does not occur.
Water entering the engine air intake will cause severe
engine damage.
Water can wash the grease from wheel bearings,
causing rusting and premature failure, and may also
enter the differentials, transmission and transfer
case, reducing the gear oil’s lubricating qualities.
 Sand and mud that has accumulated in brake drums
and around brake discs may affect braking ef ficiency
and may damage brake system components.
 Always perform a maintenance inspection after each
day of offroad driving that has taken you through
rough terrain, sand, mud, or water. For scheduled
maintenance information, refer to the “Owner’s
Manual Supplement / Scheduled Maintenance”.

DRIVING TIPS
476
TRAILER TOWING
Your vehicle is designed primarily as a passenger−and−load
carrying vehicle. T owing a trailer will have an adverse ef fect on
handling, performance, braking, durability and driving
economy (fuel consumption, etc.). Y our safety and satisfaction
depend on the proper use of correct equipment and cautious
driving habits. For your safety and the safety of others, you
must not overload your vehicle or trailer. Lexus warranties do
not apply to damage or malfunction caused by towing a trailer
for commercial purposes. Ask your local Lexus dealer for
further details before towing.
CAUTION
Vehicles with electronically modulated air suspension:
When disconnecting a trailer, put the vehicle height in
the “LO” 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 unexpected
accident. For details see “Electronically modulated air
suspension” on page 437.
NOTICE
When towing a trailer, be sure to consult your Lexus
dealer for further information on additional
requirements such as a towing kit, etc.

DRIVING TIPS
483
Trailer lights
 Socket for trailer lights
Your vehicle is equipped with a wire harness stored in the rear
end underbody. Models with tow hitch receiver are fitted with
a socket for trailer lights under the rear bumper. Use either of
them to connect and operate the trailer lights. However, the
trailer lights must comply with federal, state/provincial and
local regulations. See your local recreational vehicle dealer or
rental agency for the correct type of wiring and relays for your
trailer. Check for correct operation of the turn signals and stop
lights each time you hitch up. Direct splicing may damage your
vehicle’s electrical system and cause a malfunction of your
lights.
Breakin schedule
 Lexus recommends that you do not tow a trailer with a new
vehicle or a vehicle with any new power train component
(engine, transmission, differential, wheel bearing, etc.) for
the first 800 km (500 miles) of driving.
Maintenance
 If you tow a trailer, your vehicle will require more frequent
maintenance due to the additional load. For this
information, please refer to the scheduled maintenance
information in the “Owner’s Manual Supplement /
Scheduled Maintenance”.
 Retighten all fixing bolts of the towing ball and bracket after
approximately 1000 km (600 miles) of trailer driving.
Connecting a trailer (models with
electronically modulated air suspension)
Stop your vehicle and a trailer in line and perform the following:
1. Put the electronically modulated air suspension in the “LO”
mode. Turn the ignition switch off or push the height control
switch to turn off the electronically modulated air suspension.
2. Connect a trailer.
3. Turn the ignition switch on or push the height control switch
to turn on the electronically modulated air suspension. Select
the “N” (normal) mode with the height select switch.

DRIVING TIPS
484
Disconnecting a trailer (models with
electronically modulated air suspension)
Stop your vehicle and trailer so they are in line and perform the
following:
1. Place the electronically modulated air suspension in “LO”
mode. (Make sure the vehicle height is in “LO” mode by
pushing the height select switch on the “
” [lower] side.)
2. Push the height control switch to turn off the electronically
modulated air suspension. The height control “OFF” indicator
light will come on.
3. Turn the ignition switch off.
4. Set the supporting leg of the trailer on the ground and raise
the hitch by 100 mm (4 in.).
5. Turn the ignition switch on.
6. Push the height control switch to turn on the electronically
modulated air suspension. The height control “OFF” indicator
will go out.
7. Wait for about one minute until vehicle height is stabilized by
the automatic leveling function.
8. Make sure the hitch is disconnected. If not, raise the hitch
higher and repeat steps 2 through 7.
Pretowing safety check
 Check that your vehicle remains level when a loaded or
unloaded trailer is hitched. Do not drive if the vehicle has an
abnormal nose −up or nose− down condition, and check for
improper tongue load, overload, worn suspension or other
possible causes.
 Make sure the trailer cargo is securely loaded so that it
cannot shift.
 Check that your rear view mirrors conform to any federal,
state/provincial or local regulations. If they do not, install
required rear view mirrors appropriate for towing purposes.

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.