2021 TOYOTA TUNDRA engine

1403-2. Opening, closing and locking the doors
AlarmSituationCorrection procedure
Exterior alarm sounds
once for 5 seconds An attempt was made
to lock the vehicle while
a door was open.
Close all of the doors
and lock the doors
again.
An attempt was made
to lock the doors using
the smart key system
while the electronic key
was still inside the vehi-
cle. Retrieve the electronic
key from the vehicle
and lock the doors
again.
An attempt was made
to lock either front door
by opening a door and
putting the inside lock
button into the lock
position, then closing
the door by pulling on
the outside door handle
with the electronic key
still inside the vehicle.
Interior alarm sounds
continuously An attempt was made
to open the door and
exit the vehicle when
the shift lever was not
in P.
Shift the shift lever to P.
The engine switch was
turned to ACC while the
driver’s door was open
(or the driver’s door
was opened while the
engine switch was in
ACC). Turn the engine switch
off and close the
driver’s door.

1423-2. Opening, closing and locking the doors
■Conditions affecting operation
The smart key system uses weak radio waves. In the following si tuations, the
communication between the electronic key and the vehicle may be affected,
preventing the smart key system, wireless remote control and en gine immobi-
lizer system from operating properly. (Ways of coping: P. 523)
● When the electronic key battery is depleted
● Near a TV tower, electric power plant, gas station, radio stati on, large dis-
play, airport or other facility that generates strong radio wav es or electrical
noise
● When carrying a portable radio, cellular phone, cordless phone or other
wireless communication device
● When the electronic key is in contact with, or is covered by th e following
metallic objects
• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil inside
• Metallic wallets or bags
• Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
● When multiple electronic keys are in the vicinity
● When other wireless keys (that emit radio waves) are being used nearby
● When carrying the electronic key together with the following devices that
emit radio waves
• Another vehicle’s electronic key or a wireless key that emits radio waves
• Personal computers or personal digital assistants (PDAs)
• Digital audio players
• Portable game systems
● If window tint with a metallic content or metallic objects are attached to the
back window
● When the electronic key is placed near a battery charger or ele ctronic
devices
■ Note for the entry function
●Even when the electronic key is within the effective range (detection areas),
the system may not operate properly in the following cases:
• The electronic key is too close to the window or outside door handle, near
the ground, or in a high place when the doors are locked or unl ocked.
• The electronic key is on the instrument panel or floor, or in the console
box or glove box when the engine is started or engine switch mo des are
changed.

1433-2. Opening, closing and locking the doors
3
Operation of each component
●Do not leave the electronic key on top of the instrument panel or near the
door pockets when exiting the vehicle. Depending on the radio w ave recep-
tion conditions, it may be detected by the antenna outside the cabin and the
door will become lockable from the outside, possibly trapping the electronic
key inside the vehicle.
● As long as the electronic key is within the effective range, th e doors may be
locked or unlocked by anyone. However, only the doors detecting the elec-
tronic key can be used to unlock the vehicle.
● Even if the electronic key is not inside the vehicle, it may be possible to start
the engine if the electronic key is near the window.
● The doors may unlock or lock if a large amount of water splashes on the
door handle, such as in the rain or in a car wash, when the electronic key is
within the effective range. (The doors will automatically be lo cked after
approximately 60 seconds if the doors are not opened and closed.)
● If the wireless remote control is used to lock the doors when t he electronic
key is near the vehicle, there is a possibility that the door m ay not be
unlocked by the entry function. (Use the wireless remote contro l to unlock
the doors.)
● Touching the door lock or unlock sensor while wearing gloves ma y prevent
lock or unlock operation. Remove the gloves and touch the lock sensor
again.
● When the lock operation is performed using the lock sensor, rec ognition sig-
nals will be shown up to two consecutive times. After this, no recognition
signals will be given.
● If the door handle becomes wet while the electronic key is with in the effec-
tive range, the door may lock and unlock repeatedly. In this case, follow the
following correction procedures to wash the vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more awa y from the
vehicle. (Take care to ensure that the key is not stolen.)
• Set the electronic key to battery-saving mode to disable the s mart key
system. ( P. 141)
● If the electronic key is inside the vehicle and a door handle b ecomes wet
during a car wash, a message may be shown on the multi-informat ion dis-
play and a buzzer will sound outside the vehicle. To turn off t he alarm, lock
all the doors.
● The lock sensor may not work properly if it comes into contact with ice,
snow, mud, etc. Clean the lock sensor and attempt to operate it again, or
use the lock sensor on the lower part of the door handle.

1443-2. Opening, closing and locking the doors
●If there is another electronic key in the detection area, it ma y take slightly
longer to unlock the doors after the door handle is gripped.
● A sudden handle operation or a handle operation immediately aft er entering
the effective range may prevent the doors from being unlocked. Touch the
door unlock sensor and check that the doors are unlocked before pulling the
door handle again.
● Fingernails may scrape against the door during operation of the door han-
dle. Be careful not to injure fingernails or damage the surface of the door.
■ Note for the unlocking function
●Gripping the door handle when wearing a glove may not unlock th e door.
● A sudden approach to the effective range or door handle may prevent the
doors from being unlocked. In this case, return the door handle to the origi-
nal position and check that the doors unlock before pulling the door handle
again.
● If there is another electronic key in the detection area, it ma y take slightly
longer to unlock the doors after the door handle is gripped.
■ When the vehicle is not driven for extended periods
●To prevent theft of the vehicle, do not leave the electronic ke y within 6 ft.
(2 m) of the vehicle.
● The smart key system can be deactivated in advance. ( P. 564)
■ To operate the system properly
●Make sure to carry the electronic key when operating the system. Do not get
the electronic key too close to the vehicle when operating the system from
the outside of the vehicle.
● Depending on the position and holding condition of the electron ic key, the
key may not be detected correctly and the system may not operat e properly.
(The alarm may go off accidentally, or the door lock prevention function may
not operate.)
■ If the smart key system does not operate properly
●Locking and unlocking the doors: Use the mechanical key. ( P. 523)
● Starting the engine: P. 523

1453-2. Opening, closing and locking the doors
3
Operation of each component
■Customization
Settings (e. g. smart key system) can be changed.
(Customizable features: P. 564)
■ If the smart key system has been d eactivated in a customized setting
● Locking and unlocking the doors:
Use the wireless remote control or mechanical key. ( P. 128, 523)
● Starting the engine and changing engine switch modes: P. 523
● Stopping the engine: P. 220s
■ Certification for the smart key system
For vehicles sold in U.S.A. and New Caledonia
FCC ID: HYQ23ABL
FCC ID: HYQ14FBA
NOTE:
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause har mful interfer-
ence, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
FCC WARNING:
Changes or modifications not expressly approved by the party re sponsible for
compliance could void the user’s authority to operate the equip ment.
For vehicles sold in Canada
NOTE:
This device complies with Industry Canada’s licence-exempt RSSs . Opera-
tion is subject to the following two conditions:
(1) This device may not cause interference; and
(2) This device must accept any interference, including interference that may
cause undesired operation of the device.
NOTE:
Le présent appareil est conforme aux CNR d’Industrie Canada app licables
aux appareils radio exempts de licence. L’exploitation est auto risée aux deux
conditions suivantes:
(1) I’appareil ne doit pas produire de brouillage;
(2) l’utilisateur de I’appareil doit accepter tout brouillage radioélectrique subi,
même si le brouillage est susceptible d’en compromettre le fonctionnement.

1523-3. Adjusting the seats
Driving position memor y (driver’s seat)
The driver’s seat and steering wheel are automatically adjusted to
allow the driver to enter and exit the vehicle easily.
When all of the following have
been performed, the driver’s seat
and steering wheel are automati-
cally adjusted to a position that
allows driver to enter and exit the
vehicle easily. • The shift lever has been shifted to P.
• The key has been remov ed from the engine switch.
• The driver’s seat belt has been unfastened.
When any of the following has be en performed, the driver’s seat and
steering wheel automatically ret urn to their original positions.
• The key has been insert ed into the engine switch.
• The driver’s seat b elt has been fastened.
■Operation of the power easy access system
When exiting the vehicle, the power easy access system may not operate if
the seat is already close to the rearmost position, etc.
■ Customization
The seat movement amount settings of the power easy access syst em can
be customized. (Customizable features: P. 564)
: If equipped
This feature automatically adjusts the driver’s seat, steering
wheel and outside rear view mirrors to make entering and exit-
ing the vehicle easier or to suit your preferences.
Power easy access system

1533-3. Adjusting the seats
3
Operation of each component
Your preferred driving position (the position of the driver’s seat, steer-
ing wheel and outside rear view mirrors) can be recorded and re called
by pressing a button.
Two different driving positions can be recorded into memory.
■Recording procedure
Check that the shift lever is in P.
Turn the engine switch to ON.
Adjust the driver’s seat, steerin g wheel, and outside rear view
mirrors to the desired positions.
While pressing the “SET”
button, or within 3 seconds
after the “SET” button is
pressed, press button “1” or
“2” until the buzzer sounds.
If the selected button has
already been preset, the previ-
ously recorded position will be
overwritten.
■
Recall procedure
Check that the shift lever is in P.
Turn the engine switch to ON.
Press one of the buttons for
the driving position you want
to recall until the buzzer
sounds.
Driving position memory
1
2
3
4
1
2
3

1543-3. Adjusting the seats
■To stop the position recall operation part-way through
Perform any of the following:
●Press the “SET” button.
● Press button “1” or “2”.
● Operate any of the seat adjustment switches (only cancels seat position
recall).
● Operate the tilt and telescopic steering control switch (only cancels steering
wheel position recall).
■ Seat positions that can be memorized ( P. 147)
The adjusted seat positions can be recorded except for lumbar s upport posi-
tions.
■ Operating the driving position me mory after the key is removed from the
engine switch
Recorded seat positions (except the steering wheel position) can be activated
up to 30 seconds after the driver’s door is opened, even if the key is removed
from the engine switch.
■ In order to correctly use the dr iving position memory function
If a seat position is already in the furthest possible position and the seat is
operated in the same direction, the recorded position may be sl ightly different
when it is recalled.