2003 TOYOTA TUNDRA ECU

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If your child restraint system has a top
strap, it should be anchored. (For the
installation of the top strap, see “—Using
a top strap” in this section.)
For the installation details, refer to the
instruction manual equipped with each
product.CAUTION
When using the lower anchorages
for the child restraint system, be
sure that there are no irregular ob-
jects around the anchorages or that
the seat belt is not caught.
Push and pull the child restraint
system in different directions to be
sure it is secure. Follow all the
installation instructions provided by
its manufacturer.
After securing the child restraint
system, never slide or recline the
seat.
Do not install a child restraint sys-
tem on the rear seat if it interferes
with the lock mechanism of the
front seats. This can cause death or
serious injury to the child and front
passenger in case of sudden brak-
ing or a collision.
To change the steering wheel angle,
hold the steering wheel, pull the lock
release lever toward you, tilt the steer-
ing wheel to the desired angle and re-
lease the lever.
When the steering wheel is in a low posi-
tion, it will spring up as you release the
lock release lever.
Tilt steering wheel

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NOTICE
Do not continue driving if the engine
drive belt is broken or loose.
(e) Low Engine Oil Pressure Warning
Light
This light warns that the engine oil pres-
sure is too low.
If it flickers or stays on while you are
driving, pull off the road to a safe place
and stop the engine immediately. Call a
Toyota dealer or qualified repair shop for
assistance.
The light may occasionally flicker when
the engine is idling or it may come on
briefly after a hard stop. There is no
cause for concern if it then goes out when
the engine is accelerated slightly.
The light may come on when the oil level
is extremely low. It is not designed to
indicate low oil level, and the oil level
must be checked using the level dipstick.
NOTICE
Do not drive the vehicle with the
warning light on—even for one block.
It may ruin the engine.
(f) Malfunction Indicator Lamp
This lamp comes on when the ignition
key is turned to the “ON” position and
goes off after the engine starts. This
means that the warning light system is
operating properly.
If the lamp remains on, or the lamp
comes on while driving, first check the
followings.
Empty fuel tank
If the fuel tank is empty, refuel immedi-
ately.
Loose fuel tank cap
If the fuel tank cap is loose, securely
tighten it.
These cases are temporary malfunctions.
The malfunction indicator lamp will go off
after taking several driving trips.
If the lamp will not go off even after the
several trips, contact your Toyota dealer
as soon as possible. If the fuel tank is not empty or the fuel
tank cap is not loose...
There is a problem somewhere in the
engine, emission control system, elec-
tronic throttle control system, automatic
transmission electrical system or warn-
ing light system itself.
Contact your Toyota dealer as soon as
possible to service the vehicle.
5VZ− FE engine—
If the engine speed does not increase with
the accelerator pedal depressed down to
about the middle position, there may be
a problem somewhere in your electronic
throttle control system.
At this time, if you depress the accelera-
tor pedal more firmly and slowly, you can
drive your vehicle at low speeds. Have
your vehicle checked by your Toyota deal-
er 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.

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Fourwheel drive models
5VZFE engine—
Front control lever in “H2” or
“H4” “2” 110 km/h (68 mph) . . . . . . . . .
“L” 60 km/h (37 mph) . . . . . . . . . .
Front control lever in “L4”
“2” 40 km/h (25 mph) . . . . . . . . . .
“L” 20 km/h (12 mph) . . . . . . . . . .
2UZFE engine—
“2WD” or “4HI” mode is selected “2” 120 km/h (75 mph) . . . . . . . . .
“L” 65 km/h (40 mph) . . . . . . . . . .
“4LO” mode is selected “2” 45 km/h (28 mph) . . . . . . . . . .
“L” 25 km/h (16 mph) . . . . . . . . . .
 Do not continue hill climbing or
hard towing for a long time in the
“2” or “L” position. This may cause
severe automatic transmission dam-
age from overheating. To prevent
such damage, “D” position should
be used in hill climbing or hard
towing.(f) Backing up
1. Bring the vehicle to a complete stop.
2. With the brake pedal held down with your foot, shift the selector lever to the
“R” position.
NOTICE
Never shift into reverse while the ve-
hicle is moving.
(g) Parking
1. Bring the vehicle to a complete stop.
2. With the brake pedal pressed down, fully depress the parking brake pedal
to apply the parking brake securely.
3. With the brake pedal pressed down, shift the selector lever to the “P” posi-
tion.
CAUTION
Never attempt to move the selector
lever into “P” position under any cir-
cumstances while the vehicle is mov-
ing. Serious mechanical damage and
loss of vehicle control may result.
(h) Good driving practice
If the transmission repeatedly shifts up
and down between third gear and over-
drive when climbing a gentle slope, the
overdrive should be turned off. Be sure
to turn the switch on immediately after-
ward.
When towing a trailer, in order to main-
tain engine braking efficiency, do not
use overdrive.
CAUTION
Always keep your foot on the brake
pedal while stopped with the engine
running. This prevents the vehicle
from creeping.
NOTICE
Always use the brake pedal or the
parking brake to hold the vehicle on
an upgrade. Do not attempt to hold
the vehicle using the accelerator ped-
al, as this can cause the transmission
to overheat.

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SHIFTING BETWEEN “H2” AND “H4”
To shift from “H2” to “H4”, reduce the
vehicle speed to less than 80 km/h (50
mph) and move the front drive control
lever.
If you have trouble shifting in cold weath-
er, reduce the vehicle speed or stop the
vehicle and reshift.
CAUTION
Never move the front drive control
lever if wheels are slipping. Stop the
slipping or spinning before shifting.
To shift from “H4” to “H2”, simply move
the front drive control lever.
This can be done at any speed.
If the indicator light does not go off when
you shift the transfer into “H2”, drive
straight ahead while accelerating or decel-
erating, or drive forward or backward in a
short distance.
SHIFTING BETWEEN “H4” AND “L4”
To shift between “H4” and “L4”, stop
the vehicle and put the transmission in
“N”. With the brake pedal depressed,
move the front drive control lever. SHIFTING BETWEEN “2WD” AND “4HI”
To shift from “2WD” to “4HI”,
reduce
the vehicle speed to less than 100 km/h
(62 mph) and push in the “2WD/4HI” but-
ton.
If the “4HI” (high speed four −wheel drive)
indicator light flashes when you push in
the “2WD/4HI” button, this reminds you
that the transfer mode is not securely in
“4HI” mode. Drive straight ahead while
accelerating or decelerating.
If the “4HI” (high speed four −wheel drive)
indicator light flashes and the buzzer
sounds when you push in the “2WD/4HI”
button, this reminds you that the transfer
mode is not in “4HI” mode. Stop the ve-
hicle or reduce the vehicle speed to less
than 100 km/h (62 mph). Push the button
to turn it off, then once again to turn it
back on.
CAUTION
Never push the “2WD/4HI” button if
the wheels are slipping. Stop the slip-
ping or spinning before shifting.
To shift from “4HI” to “2WD”, push the
“2WD/4HI” button again to turn it off.
This can be done at any speed.
If the “4HI” (high speed four −wheel drive)
indicator light flashes when you push the
“2WD/4HI” button again to return to “2WD”
mode, this reminds you that the transfer
mode is not securely in “2WD” mode.
Drive straight ahead while accelerating or
decelerating, or drive forward or backward
in a short distance.
(c) Shifting procedure
(lever type with automatic
transmission) (c) Shifting procedure
(button type)

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SHIFTING BETWEEN “4HI” AND “4LO”
To shift from “4HI” to “4LO”, stop the
vehicle and put the transmission into “N”.
With the brake pedal depressed, push the
“4LO” button. If the “2WD/4HI” button left
out, push in the “2WD/4HI” button to se-
lect the “4HI” mode.
If the “4LO” (low speed four −wheel drive)
indicator light flashes and the buzzer
sounds for 3 seconds when you push the
“4LO” button, this reminds you that the
transfer mode is not in “4LO” mode. Drive
forward or backward in a short distance,
then stop the vehicle completely, put the
transmission securely into “N” and push
the button again.
To shift from “4LO” to “4HI”, stop the
vehicle and put the transmission into “N”.
With the brake pedal depressed, push the
“4LO” button.
If the “4LO” (low speed four −wheel drive)
indicator light flashes and the buzzer
sounds for 3 seconds when you push the
“4LO” button, this reminds you that the
transfer mode is not in “4HI” mode. Drive
forward or backward in a short distance,
then stop the vehicle completely, put the
transmission securely into “N” and push
the button again. SHIFTING BETWEEN “2WD” AND “4LO”
To shift from “2WD” to “4LO”,
stop the
vehicle and put the transmission into “N”.
With the brake pedal depressed, push the
“2WD/4HI” button in to select the “4HI”
mode, then push the “4LO” button.
If the “4LO” (low speed four −wheel drive)
indicator light flashes and the buzzer
sounds for 3 seconds when you push the
“4LO” button, this reminds you that the
transfer mode is not in “4LO” mode. Drive
forward or backward in a short distance,
then stop the vehicle completely, put the
transmission securely into “N” and push
the button again.
To shift from “4LO” to “2WD”, stop the
vehicle and put the transmission into “N”.
With the brake pedal depressed, push the
“2WD/4HI” switch again to turn it off. 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.

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The auxiliary box is equipped with a
cassette tape holder.
To use the holder, raise the auxiliary box
lid while pushing the lock release button.
The plate for the cassette tape holder is
detachable. The cup holder is designed for holding
cups or drinkcans securely. To use
them, observe the following illustra-
tions.
CAUTION
Do not place anything else other
than cups or drinkcans in the cup
holder, as such items may be
thrown about and possibly injure
people in the vehicle during sudden
braking or in an accident.
To reduce the chance of injury in
case of an accident or a sudden
stop while driving, keep the cup
holder closed when it is not in use.
NOTICE
Type A only—As this holder is de-
signed for holding soft cups only, do
not place too heavy a cup, drinkcan
or bottle in it.
Cassette tape holder
Cup holders

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When stowing cargo and luggage in
the vehicle, observe the following:
 Put cargo and luggage in the rear
deck when at all possible. Be sure
all items are secured in place.
 Be careful to keep the vehicle bal-
anced. Locating the weight as far
forward as possible helps maintain
balance.
 For better fuel economy, do not
carry unneeded weight.
CAUTION
To prevent cargo and l uggage
from sliding forward during
braking, do not stack anything
behind the front seats higher
than the seatbacks (access cab
models). Keep cargo and lug-
gage low, as close to the floor
as possible.
 Never allow anyone to ride in
the rear deck. It is not designed
for passengers. They s hould
ride in their seats with their
seat belts properly fastened.
Otherwise, they are much more
likely to suffer serious bodily
injury, in the event of sudden
braking or a collision.
 Do not drive with objects left
on top of the instrument panel.
They may interfere with the
driver’s field of view. Or they
may move during sharp vehicle
acceleration or turning, and im-
pair the driver’s control of the
vehicle. In an accident they
may injure the vehicle occu-
pants.Cargo capacity depends on the to-
tal weight of the occupants.
(Cargo capacity) = (Total load capac-
ity) – (Total weight of occupants)
STEPS FOR DETERMINING
CORRECT LOAD LIMIT
1. Locate the statement “The com- bined weight of occupants and
cargo should never exceed XXX
pounds” on your vehicle’s placard.
2. Determine the combined weight of the driver and passengers that will
be riding in your vehicle.
3. Subtract the combined weight of the driver and passengers from
XXX kilograms or XXX pounds.
Cargo and luggage—
—Stowage precautions —Capacity and distribution

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Washing your vehicle or driving through
deep water may get the brakes wet. To
see whether they are wet, check that
there is no traffic near you, and then
press the pedal lightly. If you do not
feel a normal braking force, the brakes
are probably wet. To dry them, drive
the vehicle cautiously while lightly
pressing the brake pedal with the park-
ing brake applied. If they still do not
work safely, pull to the side of the road
and call a Toyota dealer for assistance.
Four−wheel drive models—Toyota rec-
ommends not using four −wheel drive on
dry hard− surfaced roads, because four −
wheel driving will cause unnecessary
noise and wear, and poor fuel econo-
my.
Four −wheel drive models—In cold tem-
peratures, noise may occur when driv-
ing in two −wheel drive before the trans-
fer is warmed up. Therefore, first drive
in four −wheel drive until the transfer is
warmed up.
CAUTION
Before driving off, make sure that
the parking brake is fully released
and the parking brake reminder
light is off.
Do not leave your vehicle unat-
tended while the engine is running.
Do not rest your foot on the brake
pedal while driving. It can cause
dangerous overheating, needless
wear, and poor fuel economy.
To drive down a long or steep hill,
reduce your speed and downshift.
Remember, if you ride the brakes
excessively, they may overheat and
not work properly.
Be careful when accelerating, up-
shifting, downshifting or braking on
a slippery surface. Sudden accelera-
tion or engine braking could cause
the vehicle to spin or skid.
Do not drive in excess of the speed
limit. Even if the legal speed limit
permits it, do not drive over 140
km/h (85 mph) unless your vehicle
has highspeed capability tires.
Driving over 140 km/h (85 mph) may
result in tire failure, loss of control
and possible injury. Be sure to con-
sult a tire dealer to determine
whether the tires on your vehicle
are highspeed capability tires or
not before driving at such speeds.
Do not continue normal driving
when the brakes are wet. If they are
wet, your vehicle will require a
longer stopping distance, and it
may pull to one side when the
brakes are applied. Also, the park-
ing brake will not hold the vehicle
securely.