2020 TOYOTA TUNDRA ECU

1283-2. Opening, closing and locking the doors
◆Wireless remote control (if equipped)Locks all the doors
Check that the door is securely locked.
Unlocks all the doors
Pressing the button unlocks the driver’s door. Pressing the button again
within 3 seconds unlocks the other doors.
◆Smart key system (if equipped)
Carry the electronic key to enable this function.
Grip the driver’s door handle
to unlock the door. Grip the
passenger’s door handle to
unlock all the doors.
Make sure to touch the sensor
on the back of the handle.
The doors cannot be unlocked
for 3 seconds after the doors are
locked.
Touch the lock sensor (the indent ation on the side of the door
handle) to lock the doors.
Check that the door is securely locked.
Vehicles without a smart key
systemVehicles with a smart key sys-
tem
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1293-2. Opening, closing and locking the doors
3
Operation of each component
■Operation signals (vehicles with a wireless remote control or s mart key
system)
A buzzer sounds and the emergency flashers flash to indicate th at the doors
have been locked/unlocked. (Locked: once; Unlocked: twice)
■ When the door cannot be locked by the lock sensor on the surface of the
door handle (vehicles with a smart key system)
■ Door lock buzzer (vehicles with a wireless remote control or sm art key
system)
If an attempt to lock the doors is made when a door is not full y closed, a
buzzer sounds continuously for 5 seconds. Fully close the door to stop the
buzzer, and lock the vehicle once more.
■ Security feature (vehicles with a wireless remote control or sm art key
system)
If a door is not opened within approximately 60 seconds after t he vehicle is
unlocked, the security feature automatically locks the vehicle again.
■ Alarm (if equipped)
Using the wireless remote control to lock the doors will set th e alarm system.
( P. 95)
■ If the smart key system or the wireless remote control does not operate
properly (if equipped)
Use the mechanical key to lock and unlock the doors. ( P. 521)
Replace the battery with a new one if it is depleted. ( P. 449)
When the door cannot be locked even if
the lock sensor on the surface of the door
handle is touched by a finger, touch the
lock sensor with the palm.
When gloves are being worn, remove the
gloves.

1333-2. Opening, closing and locking the doors
3
Operation of each component
Tailgate
Unlock the tailgate
Lock the tailgate
Pull the handle
Open the tailgate slowly
The support cables will hold the
tailgate horizontal.
Lift and close the tailgate
After closing the tailgate, try pulling
it toward you to make sure it is
securely locked.
The tailgate can be opened using the tailgate handle. The tail-
gate can be locked/ unlocked using a key.
Locking/unlocking the tailgate
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Opening/closing the tailgate
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1373-2. Opening, closing and locking the doors
3
Operation of each component
For rear end protection and easier
step-up loading.
To get on the rear step bumper,
use the shaded area in the illustra-
tion.
Rear step bumper
WARNING
■Before removing the tailgate
Disconnect the wire harness between the back-up camera and the vehicle.
Failure to do so may result in serious personal injury or damage to the vehi-
cle components.
■ Caution while driving
Observe the following precautions.
Failure to do so may result in death or serious personal injury .
● Do not drive with the tailgate open.
● Do not allow others to get on the rear step bumper.
NOTICE
■To prevent damage to the tailgate wire harness
Do not pull out all of the tailgate wire harness before opening the tailgate.
■ To prevent damage to the camera lens
Store the removed tailgate with the back-up camera lens facing upward.
■ After closing the tailgate
Try pulling it toward you to make sure it is securely locked.
■ To prevent damage to the rear step bumper
Do not allow more than one person to get on the rear step bumpe r at a time.

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.

1513-3. Adjusting the seats
3
Operation of each component
WARNING
■When raising the bottom cushion
Observe the following precautions.
Failure to do so may result in death or serious injury.
● Do not raise the bottom cushion while driving.
● Stop the vehicle on level ground, set the parking brake and shi ft the shift
lever to P.
■ When bottom cushion is raised
Do not allow passengers to sit on raised bottom cushion or plac e anything
on storage box (Double Cab models) while driving.
■ When returning the seats to their original position
Observe the following precautions.
Failure to do so may result in death or serious injury.
● Be careful not to get your hands or feet pinched in the seat.
● Make sure the bottom cushions are securely locked.
● Check that the seat belts are not twisted or caught in the seat .
● Arrange the seat belts in the proper positions for ready use.
● Make sure that there are no objects under the seat cushion or on the load-
ing floor.
NOTICE
■Before raising the bottom cushion
● Make sure that there are no objects, such as cushions, on the seat cush-
ion.
● The seat belts must be stowed.

1613-4. Adjusting the steering wheel and mirrors
3
Operation of each component
Steering wheel
Hold the steering wheel and
push the lever down.
Vehicles with front bench type seat
Adjust to the ideal position by
moving the steering wheel.
After adjustment, pull the lever up
to secure the steering wheel.
Vehicles with front separate type seats
Adjust to the ideal position by
moving the steering wheel hori-
zontally and vertically.
After adjustment, pull the lever up
to secure the steering wheel.
Adjustment procedure (manually adjustable type)
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1623-4. Adjusting the steering wheel and mirrors
Operating the switch moves the steering wheel in the following direc-
tions:
Up
Down
Toward the driver
Away from the driver
To sound the horn, press on or
close to the mark.
■ After adjusting the steering wheel (manual adjustable type)
Make sure that the steering wheel is securely locked.
The horn may not sound if the steer ing wheel is not securely locked.
( P. 161)
Adjustment procedure (power-adjustable type)
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Horn