2023 TOYOTA TUNDRA HYBRID air conditioning

4TABLE OF CONTENTS
Owners Manual_USA_M0C052_en
Driving assist systems ..374
Trailer brake controller .. 380
Trailer Backup Guide .... 383
Active front spoiler ........ 388
4-6. Driving tips Hybrid Electric Vehicle driving tips............................... 390
Off-road precautions ..... 392
Winter driving tips ......... 395
5-1. Using the air conditioning
system and defogger
Automatic air conditioning system ......................... 400
Heated steering wheel/seat heaters/seat ventilators 407
5-2. Using the interior lights Interior lights list ............ 410
5-3. Using the storage features List of storage features . 413
Luggage compartment fea- tures ............................ 417
5-4. Using the other interior fea- tures
Other interior features ... 420
Garage door opener...... 433
6-1. Maintenance and care Cleaning and protecting the vehicle exterior ............ 442
Cleaning and protecting the vehicle interior ............. 445
6-2. Maintenance Maintenance requirements
.................................... 448
General maintenance .... 449
Emission inspection and maintenance (I/M) programs.................................... 452
6-3. Do-it-yourself maintenance Do-it-yourself service precau-tions ............................. 454
Hood .............................. 456
Engine compartment ..... 457
12-volt battery................ 463
Tires .............................. 466
Tire inflation pressure .... 476
Wheels .......................... 478
Air conditioning filter ...... 479
Cleaning the hybrid battery (traction battery) air intake
vents ............................ 481
Electronic key battery .... 484
Checking and replacing fuses .................................... 486
Light bulbs ..................... 489
7-1. Essential information Emergency flashers....... 494
If your vehicle has to be stopped in an emergency.................................... 494
If the vehicle is submerged or water on the road is rising.................................... 495
7-2. Steps to take in an emer- gency
If your vehicle needs to be towed ........................... 497
5Interior features
6Maintenance and care
7When trouble arises

18Pictorial index
Owners Manual_USA_M0C052_en
Power switch ................................................... ................... P.195
Starting the hybrid system/changing the modes .................. P. 1 9 5
Emergency stop of the hybrid system ............................ ...... P.494
When the hybrid system will not start .......................... ........ P.524
Warning messages ............................................... ............... P.511
Multimedia system
*2
Air conditioning system ............................. ....................... P.400
Usage................................................................................... P.400
Back window defogger ........................................... .............. P.401
Shift lever.................................................... ........................ P.200
Changing the shift position.................................... ............... P.201
Precautions for towing .. ....................................... ................ P.497
When the shift lever does not move............................. ........ P.201
Tilt and telescopic st eering control switch
*1/tilt and telescopic
steering lock release lever
*1P.143
Adjustment ..................................................... ...................... P.143
Driving position memory
*1.................................................... P.137
Hood lock release lever ........................................ ............. P.456
*1: If equipped
*2: Refer to “MULTIMEDIA OWNER’S MANUAL”.

761-4. Hybrid system
Owners Manual_USA_M0C052_enThe illustration is an example fo
r explanation and may differ from the actual
item.
Warning label
Service plug
Hybrid battery (traction battery)
High voltage cables (orange)
Electric motor (traction motor)
Air conditioning compressor
Power control unit
■Running out of fuel When the vehicle has run out of fuel
and the hybrid s
ystem cannot be
Hybrid system precautions
Take care when handling the hybrid system, as it is a high
voltage system (about 288 V at maximum) as well as contains
parts that become extremely hot when the hybrid system is
operating. Obey the warning labels attached to the vehicle.
System components

1934-1. Before driving
Owners Manual_USA_M0C052_en
4
Driving
brakes too frequently. This
could cause the brakes to
overheat and result in
reduced braking efficiency.
 Due to the added load of the
trailer, your vehicle’s hybrid
system may overheat on hot
days (at temperatures over
85°F [30°C]) when driving up
a long or steep grade. If the
engine coolant temperature
gauge indicates overheating,
immediately turn off the air
conditioning (if in use), pull
your vehicle off the road and
stop in a safe spot. ( P.535)
 Always place wheel blocks
under both the vehicle’s and
the trailer’s wheels when
parking. Apply the parking
brake firmly, and put the
transmission in P. Avoid park-
ing on a slope, but if unavoid-
able, do so only after
performing the following:
1 Apply the brakes and keep
them applied.
2 Have someone place wheel
blocks under both the vehi-
cle’s and trailer’s wheels.
3 When the wheel blocks are in
place, release the brakes
slowly until the blocks absorb
the load.
4 Apply the parking brake
firmly.
5 Shift into P and turn off the
hybrid system. 
When restarting after parking
on a slope:
1 With the transmission in P,
start the hybrid system. Be
sure to keep the brake pedal
pressed.
2 Shift into a forward gear. If
reversing, shift into R.
3 If the parking brake is in man-
ual mode, release the park-
ing brake. ( P.205)
4 Release the brake pedal, and
slowly pull or back away from
the wheel blocks. Stop and
apply the brakes.
5 Have someone retrieve the
blocks.
■Break-in schedule
If your vehicle is new or equipped
with any new power train compo-
nents (such as an engine, transmis-
sion, transfer [4WD models], rear
differential or wheel bearing), Toyota
recommends that y ou do not tow a
trailer until the vehicle has been
driven for over 500 miles (800 km).
After the vehicle has been driven for
over 500 miles (800 km), you can
start towing. However, for the next
500 miles (800 km), drive the vehi-
cle at a speed of less than 50 mph
(80 km/h) when towing a trailer, and
avoid full throttle acceleration.
■Maintenance
●If you tow a trailer, your vehicle
will require more fr equent mainte-
nance due to the additional load.
(See “Owner’s Warranty Informa-
tion Booklet” or “Scheduled Main-
tenance Guide” / “Owner’s Manual
Supplement”.)
●Retighten the fixing bolts of the
towing ball and bracket after

2284-5. Using the driving support systems
Owners Manual_USA_M0C052_en
■If a warning message is displayed on the multi-information display
A system may be tempor arily unavailable or there may be a malfu nction in
the system.
●In the following situations, perform the actions specified in t he table. When
the normal operating conditions are detected, the message will disappear
and the system will be come operational.
If the message does not disapp ear, contact your Toyota dealer.
●In the following situations, if the situation has changed (or the vehicle has
been driven for some time) and the normal operating conditions are
detected, the message will disappear and the system will become opera-
tional.
If the message does not disappea r, contact your Toyota dealer.
SituationActions
When the area around a camera is
covered with dirt, moisture (fogged
up, covered with condensation, ice,
etc.), or other foreign matterUsing the wiper and A/C function,
remove the dirt and other attached
matter. ( P.401)
When the temperature around the
front camera is outside of the opera-
tional range, such as when the vehi-
cle is in the sun or in an extremely
cold environment
If the front camera is hot, such as
after the vehicle had been parked in
the sun, use the air conditioning sys-
tem to decrease the temperature
around the front camera.
If a sunshade was used when the
vehicle was parked, depending on its
type, the sunlight reflected from the
surface of the sunshade may cause
the temperature of the front camera
to become excessively high.
If the front camera is cold, such after
the vehicle is parked in an extremely
cold environment, use the air condi-
tioning system to increase the tem-
perature around the front camera.
The area in front o f the front camera
is obstructed, such as when the
hood is open or a sticker is attached
to the part of the win dshield in front
of the front camera.
Close the hood, rem ove the sticker,
etc., to clear the obstruction.
When “Pre-Collisio n System Radar
In Self Calibration Unavailable See
Owner’s Manual” is displayed.Check whether there is attached
materials on the radar sensor and
radar sensor cover, and if there is,
remove it.

2774-5. Using the driving support systems
Owners Manual_USA_M0C052_en
4
Driving
over the sensor surface, such as in
a heavy rain. When the system
determines that it is normal, the sys-
tem will return to normal.
■Sensor detection information
●The sensor’s detection areas are
limited to the areas around the
vehicle’ front and rear bumpers.
●The following situations may occur
during use.
• Depending on the shape of the
object and other factors, the
detection distance may shorten, or
detection may be impossible.
• Detection may be impossible if static objects draw too close to the
sensor.
• There will be a short delay
between static object detection
and display (warning buzzer
sounds). Even at low speeds,
there is a possibilit y that the object
will come within 11.9 in. (30 cm)
before the display is shown and
the warning buzzer sounds.
• It might be difficult to hear the
buzzer due to the volume of the
audio system or air flow noise of
the air conditioning system.
• It may be difficult to hear the sound of this system due to the
buzzers of other systems.
■Objects which the system may
not be properly detected
The shape of the object may pre-
vent the sensor from detecting it.
Pay particular attention to the follow-
ing objects:
●Wires, fences, ropes, etc.
●Cotton, snow and other materials
that absorb sound waves
●Sharply-angled objects
●Low objects
●Tall objects with upper sections
projecting outwards in the direc-
tion of your vehicle
■Situations in which the system
may not operate properly
Certain vehicle conditions and the surrounding environment may affect
the ability of a sensor to correctly
detect objects. Part
icular instances
where this may occur are listed
below.
●There is dirt, snow, water drops or
ice on a sensor. (Cleaning the
sensors will resolve this problem.)
●A sensor is froz en. (Thawing the
area will resolve this problem.)
In especially cold weather, if a
sensor is frozen the sensor dis-
play may be displayed abnormally,
or objects, such as a wall, may not
be detected.
●When a sensor or the area around
a sensor is extremely hot or cold.
●On an extremely bumpy road, on
an incline, on gravel, or on grass.
●When vehicle horns, vehicle
detectors, motorcycle engines, air
brakes of large vehicles, the clear-
ance sonar of ot her vehicles or
other devices which produce ultra-
sonic waves are near the vehicle
●A sensor is coated with a sheet of
spray or heavy rain.
●If objects draw too close to the
sensor.
●When a pedestrian is wearing
clothing that does not reflect ultra-
sonic waves (ex. skirts with gath-
ers or frills).
●When objects that are not perpen-
dicular to the ground, not perpen-
dicular to the vehicle traveling
direction, uneven, or waving are in
the detection range.
●Strong wind is blowing
●When driving in inclement weather

2864-5. Using the driving support systems
Owners Manual_USA_M0C052_en
●When a vehicle turns into the
detection area
■Situations in which the system
may operate even if there is no
possibility of a collision
Instances of the RCTA function
unnecessary detec ting a vehicle
and/or object may increase in the
following situations:
●When the parking space faces a
street and vehicles are being
driven on the street
●When the distanc e between your
vehicle and metal objects, such as
a guardrail, wall, sigh, or parked
vehicle, which may reflect electri-
cal waves toward the rear of the
vehicle, is short
●When equipment that may
obstruct a sensor is installed, such
as a towing eyelet, bumper pro-
tector (an additional trim strip,
etc.), bicycle car rier, or snow plow
●When a vehicle passes by the
side of your vehicle
●When a detected vehicle turns
while approaching the vehicle
●When there are spinning objects
near your vehicle such as the fan
of an air conditioning unit
●When water is splashed or
sprayed toward the rear bumper,
such as from a sprinkler
●Moving objects (f lags, exhaust
fumes, large rain droplets or
snowflakes, rain water on the road
surface, etc.)
●When the distance between your
vehicle and a guardrail, wall, etc.,
that enters the detection area is
short
●Gratings and gutters

3594-5. Using the driving support systems
Owners Manual_USA_M0C052_en
4
Driving
fuel economy through moderate
throttle characteri stics and by con-
trolling the operation of the air con-
ditioning system (heating/cooling).
The “ECO” indicator comes on.
• “SPORT S” mode
Assists accelerati on response by
controlling the transmission, engine
and steering. Suitable for when pre-
cise handling is desirable, for
example when driving on mountain
roads. The “SPORT S” indicator
comes on.
• “SPORT S+” mode
Helps to ensure th e controllability
and stability of the vehicle by inte-
grally controlling the steering wheel
and suspensions as well as the
transmission and engine, making it
suitable for sporty driving. The
“SPORT S+” indicator comes on.
• “CUSTOM” mode
Allows you to drive with the power
train, chassis and air conditioning
system functions set to your pre-
ferred settings. Custom mode set-
tings can only be changed on the
drive mode customization display of
multimedia system. The “CUSTOM”
indicator comes on.
■The driving mode select switch
can be operated when
The front-wheel dri ve control switch
is in “2H” and “4H”.
■Operation of the air condition-
ing system in Eco mode
Eco mode controls the heating/cool-
ing operations and fan speed of the
air conditioning system to enhance
fuel efficiency. To improve air condi-
tioning performance, perform the
following operations:
●Adjust the fan speed ( P.400)
●Turn off Eco drive mode ( P.358)
■Automatic deactivation of driv-
ing modes:
Driving mode is deactivated or the
driving mode will be changed to nor-
mal mode in the following condi-
tions:
●After turning the power switch off
and then turning it to on
●When the front-wheel drive control
switch is in “4L” (4WD models
only)
●When the Multi-terrain Select is
turned on (if equipped)
●When the Downhill assist control
system is turned on (if equipped)
●When the “TOW HAUL” mode or
“TOW+” mode is turned on (if
equipped)
■Customization
The Custom mode can be changed.
(Customizable features: P.570)