tires TOYOTA TUNDRA 2004 1.G Owners Manual

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Installation of a mobile
twoway radio system
As the installation of a mobile two −way radio system in
your vehicle could affect electronic systems such as fol-
lows, be sure to check with your Toyota dealer for precau-
tionary measures or special instructions regarding installa-
tion.
 Multiport fuel injection system/sequential multiport
fuel injection system
 Electronic throttle control system
 SRS airbag system
 Seat belt pretensioner system
 Anti −lock brake system
 Traction control system
 “AUTO LSD” system
 Vehicle stability control system
 Cruise control system
Tires and loading on your
To y o t a
Underinflated or overinflated tire pressure and the
excess load may result in the deterioration of
steering ability and braking ability, leading to an
accident. Check the tire inflation pressure periodi-
cally and be sure to keep the load limits given in
this Owner ’s Manual. For details about tire inflation
pressure and load limits, see “Checking tire infla-
tion pressure” in Section 7−2 and “Vehicle load
limits” in Section 2.

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If the “4LO” (low speed four −wheel drive)
indicator light flashes and the buzzer
sounds when you push the “2WD/4HI” but-
ton, this reminds you that the transfer
mode is not in “2WD” mode. Push the
“2WD/4HI” button in to return to “4LO”
mode, drive forward or backward in a
short distance, then stop the vehicle com-
pletely, put the transmission securely into
“N” and push the “2WD/4HI” button once
again.
If the “4LO” (low speed four −wheel drive)
indicator light flashes when you push the
“2WD/4HI” button, this reminds you that
the transfer mode is not in “2WD” mode.
Drive straight ahead while accelerating or
decelerating, or drive forward or backward
in a short distance. The traction control system automatical-
ly helps prevent the spinning of rear
wheels (twowheel drive models) or 4
wheels (fourwheel drive models) when
the vehicle is started or accelerated on
slippery road surfaces.
When the ignition key is turned to “ON”,
the system automatically turns on.
CAUTION
Under certain slippery road condi-
tions, full traction of the vehicle and
power to the rear wheels (twowheel
drive models) or 4 wheels (fourwheel
drive models) cannot be maintained,
even though the traction control sys-
tem is in operation. Do not drive the
vehicle under any speed or maneuver-
ing conditions which may cause the
vehicle to lose traction control. In si-
tuations where the road surface is
covered with ice or snow, your ve-
hicle should be fitted with snow tires
or tire chains. Always drive at an ap-
propriate and cautious speed for the
present road conditions.
Ty p e A
Ty p e B
Traction control system

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NOTICE
Do not drive with the “AUTO LSD”
switch continuously turned on.
The vehicle stability control system
helps provide integrated control of the
systems such as antilock brake sys-
tem, traction control, engine control,
etc. This system automatically controls
the output of the brakes or engine to
help prevent the vehicle from skidding
when cornering on a slippery road sur-
face or operating steering wheel abrupt-
ly.
The vehicle stability control activates
when the vehicle speed is more than 15
km/h (9 mph).
You may hear a sound in the engine
compartment for a few seconds when the
engine is started or just after the vehicle
begins to move. This means that the sys-
tem is in the self −check mode, but does
not indicate a malfunction.CAUTION
Do not rely excessively on the ve-
hicle stability control system. Even
if the vehicle stability control sys-
tem is operating, you must always
drive carefully and attentively to
avoid serious injury. Reckless driv-
ing will result in an unexpected ac-
cident. If the slip indicator light
blinks and an alarm sounds, 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 Toyota dealer. (See
“Checking and replacing tires” in
Section 72.)
Vehicle stability control
system

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INFORMATION BEFORE DRIVING YOUR
TOYOTA
Information before driving your Toyota
Off−road vehicle precautions 318
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Break −in period 319
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Fuel 319
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. . . . . . . . . . . . . . . . . . .
Fuel pump shut off system 321
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation in foreign countries 321
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Three −way catalytic converters 322
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine exhaust cautions 323
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Facts about engine oil consumption 324
. . . . . . . . . . . . . . . . . . . . . . . . . .
Twin ground electrode spark plugs 325
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake system 325
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Brake pad wear limit indicators 331
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear step bumper 332
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. . . . . .
StepSide bed 332
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. . . . . . . . . .
Limited −slip differential 332
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. .
Your Toyota’s identification 333
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft prevention labels 334
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. .
Suspension and chassis 334
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Tire information 335
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. . . . . . . . .
Vehicle load limits 343
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . .
Cargo and luggage 344
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. . . . .
Types of tires 346
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. . . . . . . . . . .
SECTION 2

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When the antilock brake system is ac-
tivated, the following conditions may
occur. They do not indicate a malfunc-
tion of the system:
You may hear the anti −lock brake sys-
tem operating and feel the brake pedal
pulsating and the vibrations of the ve-
hicle body and steering wheel. You
may also hear the motor sound in the
engine compartment even after the ve-
hicle is stopped.
At the end of the anti −lock brake sys-
tem activation, the brake pedal may
move a little forward.
CAUTION
Do not overestimate the antilock
brake system: Although the antilock
brake system assists in providing ve-
hicle control, it is still important to
drive with all due care and maintain
a moderate speed and safe distance
from the vehicle in front of you, be-
cause there are limits to the vehicle
stability and effectiveness of steering
wheel operation even with the anti
lock brake system on.
If tire grip performance exceeds its
capability, or if hydroplaning occurs
during high speed driving in the rain,
the antilock brake system does not
provide vehicle control.
Antilock brake system is not de-
signed to shorten the stopping dis-
tance: 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 dis-
tance in the following cases:
Driving on rough, gravel or snow
covered 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 differ-
ences in surface height.
Install all 4 tires of specified size at
appropriate pressure: The antilock
brake system detects vehicle speeds
using the speed sensors for respec-
tive wheels’ turning speeds. The use
of tires other than specified may fail
to detect the accurate turning speed
resulting in a longer stopping dis-
tance.

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Depressing the brake pedal on slippery
road surfaces such as on a manhole cov-
er, a steel plate at a construction site,
joints in a bridge, etc. on a rainy day
tends to activate the anti −lock brake sys-
tem.
You may hear a click or motor sound in
the engine compartment for a few seconds
when the engine is started or just after
the vehicle begins to move. This means
that the anti −lock brake system is in the
self − check mode, and does not indicate
a malfunction.
When the antilock brake system is ac-
tivated, the following conditions may
occur. They do not indicate a malfunc-
tion of the system:
You may hear the anti −lock brake sys-
tem operating and feel the brake pedal
pulsating and the vibrations of the ve-
hicle body and steering wheel. You
may also hear the motor sound in the
engine compartment even after the ve-
hicle is stopped.
At the end of the anti −lock brake sys-
tem activation, the brake pedal may
move a little forward.
CAUTION
Do not overestimate the antilock
brake system: Although the antilock
brake system assists in providing ve-
hicle control, it is still important to
drive with all due care and maintain
a moderate speed and safe distance
from the vehicle in front of you, be-
cause there are limits to the vehicle
stability and effectiveness of steering
wheel operation even with the anti
lock brake system on .
If tires grip performance exceeds its
capability, or if hydroplaning occurs
during high speed driving in the rain,
the antilock brake system does not
provide vehicle control.
Antilock brake system is not de-
signed to shorten the stopping dis-
tance: 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 dis-
tance in the following cases:
Driving on rough, gravel or snow
covered 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 differ-
ences in surface height.
Install all 4 tires of specified size at
appropriate pressure: The antilock
brake system detects vehicle speeds
using the speed sensors for respec-
tive wheels’ turning speed. The use
of tires other than specified may fail
to detect the accurate turning speed
resulting in a longer stopping dis-
tance.

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The rear step bumper is for rear end
protection and easier stepup loading.
CAUTION
Do not allow more than one person
to get on the rear step bumper at
a time. It is designed for only one
person.
Never drive the vehicle with anyone
on the rear step bumper.
The side step is for easier stepup
loading.
CAUTION
For models equipped with a StepSide
bed:
Do not allow more than one person
to get on the side step. Do not
exceed the maximum weight limit of
136 kg (300 lb.) on the side step.
Never drive the vehicle with anyone
on the side steps.
Do not stand on the side steps
while the vehicle is moving.
Some Toyotas are equipped with a lim-
ited−slip differential. If one of the rear
wheels begins to spin, the limited −slip dif-
ferential is designed to aid traction by
automatically transmitting driving force to
the other rear wheel. If you are not sure
whether your vehicle is equipped with one,
you can ask your Toyota dealer.
CAUTION
Do not start or run the engine while
your vehicle is supported by a jack.
The vehicle could be driven off the
jack and could pose a danger or re-
sult in serious injury.
NOTICE
Use only a spare tire of the same
size, construction and load capacity
as the original tires on your Toyota
because damage to the limitedslip
differential could possibly occur with
another tire type.
Rear step bumper StepSide bedLimitedslip differential

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This illustration indicates typical tire
symbols.
1. Tire size— F or det ails, see “— Ti re
size” in this Section.
2. DOT and Tire Identification Number (TIN)— For details, see
“—DOT and Tire Identification
Number (TIN)” in this Section.
3. Uniform tire quality grading— For details, see “Uniform tire quali-
ty grading” that follows
4. The location of the tread wear indicators— For details, see
“Checking and replacing tires” in
Section 7 −2.
5. Tire ply composition and mate- rials— Plies mean a layer of rub-
ber −coated parallel cords. Cords
mean the strands forming the plies
in the tire.
6. Radial tires or biasply tires— A
radial tire has “RADIAL” on the
sidewall. The tire not marked with
“RADIAL” is a bias −ply tir e.
Tire information—
—Tire symbols

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7. “TUBELESS” or “TUBE
TYPE”— A tubeless tire does not
have a tube inside the tire and air
is directly filled in the tire. A tube
type tire has a tube inside the tire
and the tube maintains the air
pressure.
8. Load limit at maximum cold tire inflation pressure— For details,
see “Checking and replacing tires”
in Section 7 −2.
9. Maximum cold tire inflation pressure— This means the pres-
sure to which a tire may be in-
flated. For details about recom-
mended cold tire inflation
pressure, see “Tires” in Section 8.
10.Summer tire or all season tire— An all season tire has “M+S”
on the sidewall. The tire not
marked with “M+S” is a summer
tire. For details, see “Types of
tires” in this Section.
This illustration indicates typical DOT
and Tire Identification Number (TIN).
1. “DOT” symbol
2. Tire Identification Number (TIN)
3. Tire manufacturer ’s identification mark
4. Tire size code
5. Manufacturer ’s optional tire type code
6. Manufacturing week
7. Manufacturing year The “DOT” symbol certifies that the
tire conforms to applicable Federal
Motor Vehicle Safety Standards.
—DOT and Tire Identification
Number (TIN)

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This information has been prepared
in accordance with regulations issued
by the National Highway Traffic Safe-
ty Administration of the U.S. Depart-
ment of Transportation. It provides
the purchasers and/or prospective
purchasers of Toyota vehicles with in-
formation on uniform tire quality grad-
ing.
Your Toyota dealer will help answer
any questions you may have as you
read this information.
DOT quality grades—All passenger
vehicle tires must conform to Fed-
eral Safety Requirements in addi-
tion to these grades. Quality
grades can be found where appli-
cable on the tire sidewall between
tread shoulder and maximum sec-
tion width. For example: Treadwear
200 Traction AA Temperature A Treadwear—
The treadwear grade is
a comparative rating based on the
wear rate of the tire when tested un-
der controlled conditions on a speci-
fied government test course. For ex-
ample, a tire graded 150 would wear
one and a half (1 −1/2) times as well
on the government course as a tire
graded 100. The relative performance
of tires depends upon the actual
conditions of their use, however, and
may depart significantly from the
norm due to variations in driving hab-
its, service practices and differences
in road characteristics and climate. Traction AA, A, B, C—
The traction
grades, from highest to lowest, are
AA, A, B, and C, and they represent
the tire’s ability to stop on wet pave-
ment as measured under controlled
conditions on specified government
test surfaces of asphalt and concrete.
A tire marked C may have poor trac-
tion performance.
Warning: The traction grade assigned
to this tire is based on braking
(straight ahead) traction tests and
does not include cornering (turning)
traction.
—Uniform tire quality grading