2023 TOYOTA TUNDRA engine

3314-6. Driving tips
4
Driving
■Tire chain installation
Observe the following precautions when installing and removing chains:
● Install and remove tire chains in a safe location.
● Install tire chains on the rear tires. Do not install tire chains on the front tires.
● Install tire chains on rear tires as tightly as possible. Retighten chains after
driving 1/4  1/2 mile (0.5  1.0 km).
● Install tire chains following the instructions provided with the tire chains.
WARNING
■ Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehicle control and ca use death or
serious injury.
● Use tires of the specified size.
● Maintain the recommended level of air pressure.
● Do not drive in excess of 75 mph (120 km/h), regardless of the type of
snow tires being used.
● Use snow tires on all, not just some wheels.
● 4WD models: Do not mix tires of different makes, models, tread patterns
or treadwear.
■ Driving with tire chains
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in the vehicle being unable to be d riven safely,
and may cause death or serious injury.
● Do not drive in excess of the speed limit specified for the tir e chains being
used, or 30 mph (50 km/h), whichever is lower.
● Avoid driving on bumpy road surfaces or over potholes.
● Avoid sudden acceleration, abrupt steering, sudden braking and shifting
operations that cause sudden engine braking.
● Slow down sufficiently before entering a curve to ensure that vehicle con-
trol is maintained.

3364-6. Driving tips
NOTICE
■To prevent the water damage
Take all necessary safety measures to ensure that water damage to the
engine or other components does not occur.
● Water entering the engine air intake will cause severe engine damage.
● Water entering the automatic transmission will cause deterioration in shift
quality, locking up of your transmission accompanied by vibration, and ulti-
mately damage.
● Water can wash the grease from wheel bearings, causing rusting and pre-
mature failure, and may also enter the differentials, transmission and
transfer case, reducing the gear oil’s lubricating qualities.
■ When you drive through water
If driving through water, such as when crossing shallow streams , first check
the depth of the water and the bottom of the river bed for firm ness. Drive
slowly and avoid deep water.
■ Inspection after off-road driving
● Sand and mud that has accumulated in brake drums and around bra ke
discs may affect braking efficiency and may damage brake system compo-
nents.
● Always perform a maintenance inspection after each day of off-r oad driv-
ing that has taken you through rough terrain, sand, mud, or wat er. For
scheduled maintenance information, refer to the “Scheduled Main tenance
Guide” or “Owner’s Manual Supplement”.

3435-1. Using the air conditioning system
5
Interior features
WARNING
■To prevent the windshield from fogging up
● Do not use
during cool air operation in extremely humid weather. The
difference between the temperature of the outside air and that of the wind-
shield can cause the outer surface of the windshield to fog up, blocking
your vision.
■ To prevent burns
Do not touch the rear view mirror surfaces when the outside rea r view mirror
defoggers are on.
NOTICE
■ To prevent battery discharge
Do not leave the air conditioning system on longer than necessa ry when the
engine is stopped.
● Do not place anything on the instrument
panel which may cover the air outlets.
Otherwise, air flow may be obstructed,
preventing the windshield defoggers to
defog.

3505-1. Using the air conditioning system
■Ventilation and air conditioning odors
●To let fresh air in, set the air conditioning system to the outside air mode.
● During use, various odors from inside and outside the vehicle may enter into
and accumulate in the air conditioning system. This may then ca use odor to
be emitted from the vents.
● To reduce potential odors from occurring:
• It is recommended that the air conditioning system be set to o utside air
mode prior to turning the vehicle off.
• The start timing of the blower may be delayed for a short peri od of time
immediately after the air conditioning system is started in automatic
mode.
■ Air conditioning filter
P. 448
WARNING
■To prevent the windshield from fogging up
● Do not use
during cool air operation in extremely humid weather.
The difference between the temperature of the outside air and that of the
windshield can cause the outer surface of the windshield to fog up, block-
ing your vision.
■ To prevent burns
Do not touch the rear view mirror surfaces when the outside rea r view mirror
defoggers are on.
NOTICE
■ To prevent battery discharge
Do not leave the air conditioning system on longer than necessa ry when the
engine is stopped.
● Do not place anything on the instrument
panel which may cover the air outlets.
Otherwise, air flow may be obstructed,
preventing the windshield defoggers to
defog.

3515-1. Using the air conditioning system
5
Interior features
Seat heaters1
1: If equipped
WARNING
■Burns
● Use caution when seating the following persons in a seat with t he seat
heater on to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the physically chal- lenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs, cold remedies, etc.)
● Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature
of the seat and may lead to overheating.
● Do not use seat heater more than necessary. Doing so may cause minor
burns or overheating.
NOTICE
■ To prevent damage to the seat heaters
Do not put heavy objects that have an uneven surface on the sea t and do
not stick sharp objects (needles, nails, etc.) into the seat.
■ To prevent battery discharge
Turn the seat heaters off when the engine is not running.

3525-1. Using the air conditioning system
Turns the seat heaters on
Drivers side
Front passenger side
Each time the switch is pressed,
the operation condition changes as
follows.
Hi (3 segments lit)  Mid (2 seg-
ments lit)  Lo (1 segment lit) 
Off
The level indicator (amber) light up
during operation.
■ The seat heaters can be used when
Vehicles without a smart key system
The engine switch is in the “ON” position.
Vehicles with a smart key system
The engine switch is in IGNITION ON mode.
■ When not in use
Turn the seat heaters off by pressing the button. The indicator light turns off.
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2

3535-2. Using the interior lights
5
Interior features
Interior lights list
Front interior light/personal
lights　　　　　 ( P. 3 5 4 )
Rear interior light ( P. 3 5 4 )
Engine switch light (vehicles
with a wireless remote control
system) Engine switch light (vehicles
with a smart key system)
Center tray light
Cargo lamp (if equipped)
( P. 355)1
2
3
4
5
6

3555-2. Using the interior lights
5
Interior features
Off
Door position
The cargo lamp comes on when a
door is opened. They turn off when
the doors are closed.
On
■Illuminated entry system
Vehicles without a smart key system
The lights automatically turn on/off according to the engine sw itch position,
whether the doors are locked/unlocked, and whether the doors are opened/
closed.
Vehicles with a smart key system
The lights automatically turn on/off according to engine switch mode, the
presence of the electronic key, whether the doors are locked/un locked, and
whether the doors are opened/closed.
■ To prevent battery discharge
If the following lights remain on when the door is not fully closed and the main
switch is in the door position, the lights will go off automati cally after 20 min-
utes:
● Front personal lights
● Interior lights
● Cargo lamp (if equipped)
■ Customization that can be configured at Toyota dealer
Settings (e.g. the time elapsed before lights turn off) can be changed.
(Customizable features: P. 568)
Cargo lamp main switch (if equipped)
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2
3