ESP Lexus GX470 2003 Electrical Components / LEXUS 2003 GX470 (OM60979U) Owner's Guide

DRIVING TIPS
354
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.
Trailer towing tips
When towing a trailer, your vehicle will handle differently
than when not towing. The three main causes of
vehicletrailer accidents are driver error, excessive speed
and improper trailer loading. Keep these in mind when
towing:
 Before starting out, check the operation of the lights and all
vehicle −trailer connections. After driving a short distance,
stop and recheck the lights and connections. Practice
turning, stopping and backing with a trailer in an area away
from traffic until you learn the feel. 
Backing with a trailer is difficult and requires practice. Grip
the bottom of the steering whe el and move your hand to the
left to move the trailer to the left. Move your hand to the right
to move the trailer to the right. (This procedure is generally
opposite to that when backing without a trailer.) Also, just
turn the steering wheel a little at a time, avoiding sharp or
prolonged turning. Have someone guide you when backing
to reduce the risk of an accident.
 Because stopping distance may be increased,
vehicle −to−vehicle distance should be increased when
towing a trailer. For each 16 km/h (10 mph) of speed, allow
at least one vehicle and trailer length between you and the
vehicle ahead. Avoid sudden braking as you may skid,
resulting in jackknifing and loss of control. This is especially
true on wet or slippery surfaces.
 Avoid jerky starts or sudden acceleration.
 Avoid jerky steering and sharp turns. The trailer could hit
your vehicle in a tight turn. Slow down before making a turn
to avoid the need of sudden braking.
 Remember that when making a turn, the trailer wheels will
be closer than the vehicle wheels to the inside of the turn.
Therefore, compensate for this by making a larger than
normal turning radius with your vehicle.

IN CASE OF AN EMERGENCY
363
IF YOU CANNOT INCREASE THEENGINE SPEED
If the engine speed does not increase with the accelerator
pedal depressed down, there may be a problem somewhere
in your electronic throttle control system.
At this time, vibration may occur. However, if you depress the
accelerator pedal more firmly and slowly, you can drive your
vehicle at low speeds. Have your vehicle checked by your
Lexus dealer as soon as possible.
Even if the abnormality of the electronic throttle control system
is corrected during low speed driving, the system may not be
recovered until the engine is stopped and the ignition key is
turned to “ACC” or “LOCK” position.
CAUTION
Be especially careful to prevent erroneous pedal
operation.
IF YOUR VEHICLE OVERHEATS
If your engine coolant temperature gauge indicates
overheating, if you experience a loss of power, or if you
hear a loud knocking or pinging noise, the engine has
probably overheated.
When the engine overheats
Pull safely off the road, stop the vehicle and turn on your
emergency flashers. Put the transmission in “P” and apply the
parking brake.
A: If steam is coming from your engine:
Turn off the engine. Leave the hood closed until there is no sign
of steam or coolant. Your engine could have been seriously
damaged already. Call your Lexus dealer for assistance.
CAUTION
To help avoid personal injury, keep the hood closed until
there is no steam. Escaping steam or coolant is sign of
very high pressure.

IN CASE OF AN EMERGENCY
385
Automatic notifications
If an airbag deploys, an emergency signal is sent
automatically to the Lexus Link Call Center. In your vehicle, the
system announces “Placing an emergency call to the Lexus
Link Center.” In response to the signal, Lexus Link Advisor will
attempt to communicate with you first. If the Advisor cannot get
any response from you, the Advisor will locate your vehicle
through the GPS, call the nearest emergency services
provider, describe the situation and your location. If necessary,
the Advisor will transfer your call to the emergency services
operator.
If the theft deterrent system on your vehicle is activated,
the Lexus Link System on your vehicle will automatically call
the Lexus Link Call Center. The Advisor will attempt to contact
you to determine whether the alarm is valid.
If you report to the Lexus Link Call Center that your vehicle has
been stolen, the Advisor will locate, track and provide location
information to the appropriate law enforcement authority. To
protect subscriber privacy, the Lexus Link Call Center will not
provide the location of a vehicle to anyone other than a law
enforcement authority.
If you accidentally activate the vehicle alarm, push the
“UNLOCK” button on the wireless remote control key within 55
seconds after the alarm was set off, or insert the key into the
door keyhole or ignition switch. The Lexus Link System will
cancel the theft call.NOTICE
 Once the emergency button is pushed, an emergency
call cannot be cancelled.
 This system is only operational in GPS and analog
cellular coverage areas. Upon subscription
expiration, all Lexus Link services (i.e. automatic
notification, emergency call functions, service call
functions, door locking/unlocking function) are
deactivated.

IN CASE OF AN EMERGENCY
390
Audible voice prompts
The following table shows the voice responses from the Lexus Link System\
.Voice phrase: Explanation about Lexus Link System
This is the Lexus Link system. Integrating
global positioning satellite and wireless
communication technology into your
Lexus and providing enhanced safety,
security, and convenience. At the touch of
a button, or automatically in the event of
an accident, you are connected to a Lexus
Link Advisor who will assist you − 24 hours
a day, 7 days a week where GPS and
cellular coverage is available. The Lexus
Link System also has an audio recorder
allowing you to record reminders to
yourself or information from a Lexus Link
Advisor.
To contact a Lexus Link Advisor, press the
“SERVICES” button. The Lexus Link
System will inform the advisor of your
vehicle’s current location and your
identity. The advisors can handle a wide
variety of services, such as giving
directions to shops, gas stations, ATMs,
restaurants and roadside assistance with
location. Services available will depend
on the service package you selected.In an emergency, press the emergency
services button on your Lexus Link
console. It is marked with a red
ambulance. Upon receiving your call, the
advisor will assess the situation and, if
necessary, alert the nearest emergency
services provider. The emergency button
should only be used in life threatening
situations.
If your Lexus detects that an airbag
deployment may have occurred, the
Lexus Link System will automatically send
an emergency message to the Lexus Link
Call Center.
The system will also automatically contact
the call center if the security system alarm
goes off. An advisor will first contact you
to determine if the alarm is valid. Upon
your confirmation, the advisor will then
provide the vehicle location to the police.If you accidentally set off the alarm, press
the remote door unlock, or insert your key
in the door lock or ignition within 55
seconds. This will prevent the Lexus Link
System from placing a theft call.
The volume control lets you adjust the
volume level for Lexus Link calls, system
prompts, and memos. Press the plus key
to increase volume and the minus key to
decrease it.
To record a memo or a call, press the key
labeled “REC”. When you are finished
recording, press the “REC” button again.
To listen to the memo, press the “PLAY”
button. You can record one message up
to five minutes long. When you record a
new memo, all of the previous memos will
be erased.
For more detailed information on the use,
features and limitations of this system,
please consult your Lexus Link Owner’s
Manual.

IN CASE OF AN EMERGENCY
391
Voice phrase
Description
The Lexus Link System is
active.The system is operational
with the ignition on.
Placing an emergency call
to Lexus Link CenterEmergency call is placed.
Calling the Lexus Link
CenterService call is placed.
Lexus Link Call cancelledService call is cancelled.
Previous attempt to call the
Lexus Link Center was
unsuccessful.The attempt to call the
Lexus Link Center was
unsuccessful.
RecordingThe recording will start.
Recording completeThe recording is complete.
Recording time exceededThe recording memory is
now full.
Playback completeThe playback is complete.
Playback cancelledThe playback is cancelled.
A Lexus Link System error
has been detected. Please
contact your Lexus dealer.An error has been detected
with the Lexus Link System.
Contact your Lexus dealer.
Voice phraseDescription
The Lexus Link System is
not active. To activate your
Lexus Link System, press
the “SERVICES” button
now.Message notifies vehicle
occupants that the
subscription has expired.
Your Lexus Link
subscription has expired.
Services are not available.You operated a Lexus Link
button despite an expired
subscription. Your Lexus
Link subscription has
expired, push the “Services”
button a second time to
reactivate.
No cellular service
available. Unable to
contact the Call Center.In cellular coverage areas
without analog coverage,
you cannot use the Lexus
Link System. Unable to
contact the Lexus Link Call
Center until you have
cellular coverage.

MAINTENANCE
395
MAINTENANCE REQUIREMENTS
Your Lexus vehicle has been designed to have fewer
maintenance requirements with longer service intervals to
save both your time and money. However, each regular
maintenance as well as day−to−day care is more important
than ever before to ensure smooth, trouble −free, safe, and
economical driving.
It is the owner’s responsibility to make sure the specified
maintenance, including general maintenance services, is
performed. Note that both the new vehicle and emission
control system warranties specify that proper maintenance
and care must be performed. See the “Owner’s Guide”,
“Owner’s Manual Supplement” or “Warranty Booklet” for
complete warranty information.
General maintenance
General maintenance items are those day −to−day care
practices that are important to your vehicle for proper
operation. It is the owner’s responsibility to ensure that the
general maintenance items are performed regularly.
These checks or inspections can be done either by yourself or
your Lexus dealer.
Scheduled maintenance
The scheduled maintenance items listed in the “Owner’s
Manual Supplement / Scheduled Maintenance” are those
required to be serviced at regular intervals. For details of your maintenance schedule, read the “Owner’s
Manual Supplement / Scheduled Maintenance”.
It is recommended that only genuine Lexus parts be used
for maintenance or for the repair of the emission control
system.
The owner may elect to use nonLexus supplied parts for
replacement purposes without invalidating the emission
control system warranty. However, use of replacement
parts which are not of equivalent quality may impair the
effectiveness of the emission control systems.
You may also elect to have maintenance, replacement, or
repair of the emission control devices and system
performed by any automotive repair establishment or
individual without invalidating this warranty. See
“Owner’s Guide”, “Owner’s Manual Supplement” or
“Warranty Booklet” for complete warranty information.
Where to go for service?
Lexus
technicians are well −trained specialists and are kept up
to date with the latest service information through technical
bulletins, service tips, and in −dealership training programs.
They are well informed about the operation of all the systems
on your vehicle.
You can be confident that your Lexus dealer’s service
department performs the best job to meet the maintenance
requirements of your vehicle − reliably and economically.

INTRODUCTION
406
DOITYOURSELF SERVICEPRECAUTIONS
If you perform maintenance yourself, be sure to follow the
correct procedure given in this section.
You should be aware that improper or incomplete servicing
may result in operating problems.
Performing do −it−yourself maintenance during the warranty
period may affect your warranty coverage. Read the separate
Lexus Warranty statement for details and suggestions.
This Section gives instructions only for those items that are
relatively easy for an owner to perform. As explained in
Section 5, there are still a number of items that must be
performed by a qualified technician with special tools.
For information on tools and parts for do−it−yourself
maintenance, see “Parts and tools” on page 407.
Utmost care should be taken when working on your vehicle to
prevent accidental injury. Here are a few precautions that you
should be especially careful to observe:
CAUTION
 When the engine is running, keep hands, clothing,
and tools away from the moving fan and engine drive
belt. (Removing rings, watches, and ties is
advisable.)
 Right after driving, the engine compartment the
engine, radiator, exhaust manifold and power
steering fluid reservoir, etc. will be hot. So be
careful not to touch them. Oil, other fluids and spark
plugs may also be hot.
 If the engine is hot, do not remove the radiator cap or
loosen the drain plugs to prevent burning yourself.
 Do not smoke, cause sparks or allow open flames
around fuel or the battery. Their fumes are
flammable.
 Do not get under your vehicle with just the body jack
supporting it. Always use automotive jack stands or
other solid supports.
 Use eye protection whenever you work on or under
your vehicle where you may be exposed to flying or
falling material, fluid spray, etc.
 Be extremely cautious when working on the battery.
It contains poisonous and corrosive sulfuric acid.
 Warning: Battery posts, terminals and related
accessories contain lead and lead compounds,
chemicals known to the State of California to cause
cancer and reproductive harm. Wash hands after
handling.

CHASSIS
436Warning: The traction grade assigned to this tire is based on
braking (straight ahead) traction tests and does not include
cornering (turning) traction.
Temperature A, B, C − The temperature grades are A (the
highest), B, and C, representing the tire’s resistance to the
generation of heat and its ability to dissipate heat when tested
under controlled conditions on a specified indoor laboratory
test
wheel. Sustained high temperature can cause the material
of the tire to degenerate and reduce tire life, and excessive
temperature can lead to sudden tire failure. The grade C
corresponds to a level of performance which all passenger car
tires must meet under the Federal Motor Vehicle Safety
Standard No. 109. Grades B and A represent higher levels of
performance on the laboratory test wheel than the minimum
required by law.
Warning: The temperature grades for this tire are established
for a tire that is properly inflated and not overloaded. Excessive
speed, underinflation, or excessive loading, either separately
or in combination, can cause heat buildup and possible tire
failure.
Tire selection
When replacing a tire, use a tire of the same size and
construction, and the same or greater load capacity as the
originally installed tires. Also, all the tires must be the
same brand and have the same tread patterns.
Using any other size or type of tire may seriously affect
handling, ride, speedometer/odometer calibration, ground
clearance, and clearance between the body and tires or snow
chains.
CAUTION
Observe the following instructions. Otherwise, an
accident may occur resulting in death or serious
injuries.
 Do not mix radial, bias belted, or biasply tires on
your vehicle, as this may cause dangerous handling
characteristics resulting in loss of control.
 Do not use tires other than the manufacturer’s
recommended size, as this may cause dangerous
handling characteristics resulting in loss of control.
 Do not use tires of different brands, sizes,
construction or tread patterns, as this may cause
dangerous handling characteristics result ing in loss
of control.

BODY
460
PROTECTING YOUR VEHICLEFROM CORROSION
Proper care of your Lexus can help ensure long −term
corrosion prevention.
The most common causes of corrosion to your vehicle
are:
 The accumulation of road salt, dirt and moisture in
hard−to−reach areas under the vehicle.
 Chipping of paint or undercoating caused by minor
accidents or by stones and gravel.
The following conditions will cause or accelerate
corrosion of your vehicle, so it is important to keep your
vehicle, particularly the underside, as clean as possible
and to repair any damage to paint or protective coatings
as soon as possible.
 The presence of road salt or dust control chemicals, salt in
the air near the sea coast, industrial air pollution.
 High humidity, especially at temperatures just above
freezing point.
 Certain parts of your vehicle are wet or damp for an
extended period of time, even though other parts of the
vehicle are dry.
 Components of the vehicle which are prevented from
quick−drying due to lack of proper ventilation are exposed
to high ambient temperature. To help prevent corrosion on your Lexus, follow these
guidelines:
Keep your vehicle clean by regular washing.
In addition,
observe the following points.
 If you drive on salted roads in the winter or if you live near
the ocean, you should hose off the undercarriage at least
once a month to minimize corrosion.
 High pressure water or steam is effective for cleaning the
vehicle’s underside and wheel housings. Pay particular
attention to these areas as it is difficult to see all the mud and
dirt. It will do more harm than good to simply wet the mud
and debris without removing them. The lower edge of
doors, rocker panels and frame members have drain holes
which should not be allowed to clog with dirt as trapped
water in these areas can cause corrosion.
 Wash the underside of the vehicle thoroughly when winter
is over.
See “Washing and waxing” on page 461 for more tips.
Check the condition of your vehicle’ s paint and trim. If you
find any chips or scratches in the paint, touch them up
immediately to prevent corrosion from starting. If the chips or
scratches have gone through the bare metal, have a qualified
body shop make the repair.

BODY
462Fuel
filler door: Do not apply water (high −pressure car wash,
for example) at or near the fuel tank inlet with the fuel filler door
opened. If the water enters the air vent, you may experience
trouble with refueling or rough engine idling.
Plastic wheel ornaments: The plastic wheel ornaments are
damaged easily by organic substances. If any organic
substance splashes an ornament, be sure to wash it off with
water and check if the ornament is damaged.
CAUTION
Do not attach the heavily damaged plastic wheel
ornament. It may fly off the wheel and cause accidents
while the vehicle is moving.
Aluminum wheels: Use only a mild soap or neutral detergent.
Urethane bumpers and side moldings: Wash carefully. Do
not scrub with abrasive cleaners. The bumper and side
molding faces are soft.
Road tar: Remove with turpentine or cleaners that are marked
safe for painted surfaces.
NOTICE
Do not use organic substances (gasoline, kerosene,
benzine or strong solvents), which may be toxic or
cause damage.
3. Rinse thoroughly − dried soap can cause streaking. In hot
weather you may need to rinse each section right after you
wash it.
4. To prevent water spots, dry the vehicle using a clean soft
cotton towel. Do not rub or press hard − you might scratch the
paint.
Automatic car wash
NOTICE
Vehicles with Lexus link system: To prevent damage to
the antenna, make sure it is removed before driving
your vehicle through an automatic car wash.
Your vehicle may be washed in an automatic car wash, but
remember that the paint can be scratched by some type of
brushes, unfiltered washing water, or the washing process
itself. Scratching reduces paint durability and gloss, especially
on darker colors. The manager of the car wash should be able
to advise you whether the process is safe for the paint on your
vehicle.
Waxing your Lexus
Polishing and waxing is recommended to maintain the
original beauty of your Lexus’ finish.
Once a month or if the vehicle surface does not repel water
well, apply wax.
1. Always wash and dry the vehicle before you begin waxing,
even if you are using a combined cleaner and wax.