2004 TOYOTA TUNDRA ECU

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2004 TUNDRA from Sep. ’03 Prod. (OM34426U)
Important information about your Toyota
Occupant restraint systems
Toyota encourages you and your family to take the time to
read Section 1 −3 of this Owner’s Manual carefully. In
terms of helping you understand how you can receive the
maximum benefit of the occupant restraint systems this
vehicle provides, Section 1 −3 of this Owner ’s Manual is
the most important Section for you and your family to
read.
Section 1 −3 describes the function and operation concern-
ing seats, seat belts, SRS airbags and child restraint sys-
tems of this vehicle and some potential hazards you
should be aware of. These systems work together along
with the overall structure of this vehicle in order to provide
occupant restraint in the event of a crash. The effect of
each system is enhanced when it is used properly and
together with other systems. No single occupant restraint
system can, by itself, provide you or your family with the
equal level of restraint which these systems can provide
when used together. That is why it is important for you and
your family to understand the purpose and proper use of
each of these systems and how they relate to each other.
The purpose of all occupant restraint systems is to help
reduce the possibility of death or serious injury in the
event of a collision. None of these systems, either individ-
ually or together, can ensure that there is no injury in the
event of collision. However, the more you know about
these systems and how to use them properly, the greater
your chances become of surviving an accident without
death or serious injury.
Seat belts provide the primary restraint to all occupants of
the vehicle, and every occupant of the vehicle should wear
seat belts properly at all times. Children should always be
secured in child restraint systems that are appropriate for
their age and size. SRS (Supplemental Restraint System)
airbags are, as their names imply, designed to work with,
and be supplemental to, seat belts and are not substitutes
for them. SRS airbags can be very effective in reducing
the risk of head and chest injuries by preventing contact of
the head and chest with interior portions of the vehicle.

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2004 TUNDRA from Sep. ’03 Prod. (OM34426U)
For easy access to the rear seat, open
the access door (rear door).
To open: First, open the front door widely.
Then pull the outside handle or inside le-
ver of the access door.
If you try to open the front and rear doors
simultaneously, they will not open.
To close: First, close the access door
completely. Then close the front door.
You can open and close the access door
only when the front door is widely opened.
NOTICE
The front door and access door could
be damaged if they hit each other
when being opened or closed. Be
sure to follow the above instructions.
Locking operation
Unlocking operation
The wireless remote control system is
designed to lock or unlock all the
doors or activate the “PANIC” mode
from a distance within approximately 1
m (3 ft.) of the vehicle.
LOCKING AND UNLOCKING THE
DOORS
To lock and unlock all the doors, push
the switches slowly and securely.
To lock: Push the “LOCK” switch. All the
doors are locked simultaneously. At this
time one beep will be heard, and the tail
lights and front side marker lights will
flash once.
Check to see that the doors are securely
locked.
If any door is not securely closed, locking
cannot be performed by the “LOCK”
switch and a beep will sound continuously
for 5 seconds. However, if the key is in
the ignition, a beep will not sound.
To stop the beep, close all the doors se-
curely or push the “UNLOCK” switch.
Wireless remote control
(standard and access cab
models for U.S.A. only)

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2004 TUNDRA from Sep. ’03 Prod. (OM34426U)
2. Remove the rubber gasket and set it
aside.3. Remove the discharged transmitter bat-tery.
NOTICE
Do not bend the terminals.
4. Put a new transmitter battery with posi-tive (+) side up.
Place the rubber gasket back on the
transmitter. Then close the transmitter
case securely.
NOTICE
 Make sure the positive side and
negative side of the transmitter bat-
tery are faced correctly.
 Do not replace the battery with wet
hands. Water may cause unexpected
rust.

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2004 TUNDRA from Sep. ’03 Prod. (OM34426U)
Do not touch or move any compo-
nents inside of the transmitter, or
it may interfere with proper opera-
tion.
 Be careful not to bend the electrode
of the transmitter battery insertion
and that dust or oils do not adhere
to the transmitter case.
 Close the transmitter case securely.
After replacing the battery, check that the
transmitter operates properly. If the trans-
mitter still does not operate properly, con-
tact your Toyota dealer.
Locking operation
Unlocking operation
The wireless remote control system is
designed to lock or unlock all the
doors or activate the “PANIC” mode
from a distance within approximately 1
m (3 ft.) of the vehicle.
LOCKING AND UNLOCKING THE
DOORS
To lock and unlock all the doors, push
the switches slowly and securely.
To lock: Push the “LOCK” switch. All the
doors are locked simultaneously. At this
time one beep will be heard, and the
parking lights and tail lights flash once.
Check to see that all the doors are se-
curely locked.
If any of the doors is not securely closed,
locking cannot be performed by the
“LOCK” switch and a beep will sound con-
tinuously for 10 seconds. However, if the
key is in the ignition, a beep will not
sound.
To stop the beep, close all the doors se-
curely or push the “UNLOCK” switch.
The beep can be disabled. For details,
contact your Toyota dealer.
Wireless remote control
(double cab models)

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2004 TUNDRA from Sep. ’03 Prod. (OM34426U)
2. Remove the discharged transmitter bat-
tery.
NOTICE
Do not bend the terminals.
3. Put a new transmitter battery with posi-tive (+) side up.
Close the transmitter case securely.
NOTICE
 Make sure the positive side and
negative side of the transmitter bat-
tery are faced correctly.
 Do not replace the battery with wet
hands. Water may cause unexpected
rust.
 Do not touch or move any compo-
nents inside of the transmitter, or
it may interfere with proper opera-
tion.
Be careful not to bend the electrode
of the transmitter battery insertion
and that dust or oils do not adhere
to the transmitter case.
 Close the transmitter case securely.
After replacing the battery, check that the
transmitter operates properly. If the trans-
mitter still does not operate properly, con-
tact your Toyota dealer.

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2004 TUNDRA from Sep. ’03 Prod. (OM34426U)
If you push in the window lock switch on
the driver ’s door, the rear window cannot
be operated.
CAUTION
To avoid serious personal injury, you
must do the following.
Before you close the power rear
window, always make sure there is
nobody around the power rear win-
dow. You must also make sure the
heads, hands and other parts of the
bodies of all occupants are kept
completely inside the vehicle. If
someone’s neck, head or hands get
caught in a closing window, it
could result in a serious injury.
When anyone closes the power rear
window, make sure he or she oper-
ates the window safely.
When small children are in the ve-
hicle, never let them use the power
rear window switch without supervi-
sion.
Be sure to remove the ignition key
when you leave your vehicle.
Never leave anyone (particularly a
small child) alone in your vehicle,
especially with the ignition key still
inserted. Otherwise, he/she could
use the power back window switch
and get trapped in a window. Unat-
tended person (particularly a small
child) can be involved in a serious
accident.
Keep the rear window closed while
driving. This not only keeps the
luggage from being thrown out but
also prevents exhaust gases from
entering the vehicle.
OPENING
To open the tailgate, pull the handle up.
The support cables will hold the tailgate
horizontal.
See “—Stowage precautions” in Section 2
for precautions when loading luggage.
After closing the tailgate, try pulling and
pushing it to make sure it is securely
closed.
NOTICE
Avoid driving with the tailgate open.
Tailgate

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2004 TUNDRA from Sep. ’03 Prod. (OM34426U)
Support cable bracket
REMOVAL
1. Open the tailgate to the angle where you can release the brackets on the
support cables from the lugs on
both sides.
To release the support cable bracket, lift
it up and slide it off.2. Tilt the tailgate to about 30 ° from
vertical and pull up the right side of
the tailgate to unhook the right side.3. Slide the tailgate a little to the right to unhook the left side.
To attach the tailgate, follow the removal
procedure in reverse order.
After closing the tailgate, try pulling it to-
ward you to make sure it is securely
closed.
We recommend you keep the tailgate
closed when not in use.
NOTICE
Make sure the support brackets are
securely latched on both side panels
when installing the tailgate.

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2004 TUNDRA from Sep. ’03 Prod. (OM34426U)
LOCKING AND UNLOCKING WITH KEY
Insert the key into the keyhole and turn
it to lock or unlock the tailgate.
To lock: Turn the key clockwise.
To unlock: Turn the key counterclockwise.To open the hood:
1. Pull the hood lock release lever. The hood will spring up slightly.
CAUTION
Before driving, be sure that the hood
is closed and securely locked. Other-
wise, the hood may open unexpected-
ly while driving and an accident may
occur.
2. In front of the vehicle, pull up theauxiliary catch l ever and lift the
hood.
Before closing the hood, check to see that
you have not forgotten any tools, rags,
etc. Then lower the hood and make sure
it locks into place. If necessary, press
down gently on the front edge to lock it.
Hood