2023 TOYOTA TUNDRA HYBRID service

771-4. Hybrid system
Owners Manual_USA_M0C052_en
1
For safety and security
started, refuel th e vehicle with at
least enough gasoline to make the
low fuel level warning light ( P.507)
go off. If there is only a small
amount of fuel, th e hybrid system
may not be able to start. (The stan-
dard amount of fuel is about 21.9 L
[5.8 gal., 4.8 Imp. gal.] when the
vehicle is on a level surface. This
value may vary whe n the vehicle is
on a slope. Add extra fuel when the
vehicle is inclined.)
■Electromagnetic waves
●High voltage parts and cables on
Hybrid Electric Vehicles incorpo-
rate electromagnetic shielding,
and therefore emi t approximately
the same amount of electromag-
netic waves as conventional gaso-
line powered vehicles or home
electronic appliances.
●Your vehicle may cause sound
interference in so me third party-
produced radio parts.
■Hybrid battery (tr action battery)
The hybrid battery (traction battery)
has a limited service life. The lifes-
pan of the hybrid battery (traction
battery) can change in accordance
with driving style and driving condi-
tions.
■Starting the hybrid system in an
extremely cold environment
When the hybrid battery (traction
battery) is extremely cold (below
approximately -31°F [-35°C]) under
the influence of t he outside tem-
perature, it may no t be possible to
start the hybrid system. In this case,
try to start the hybrid system again
after the temperature of the hybrid
battery increases due to the outside
temperature increase etc.
WARNING
■High voltage precautions
This vehicle has high voltage DC
and AC systems as well as a 12-
volt system. DC and AC high volt-
age is very dangerous and can
cause severe burns and electric
shock that may result in death or
serious injury.
●Never touch, disassemble,
remove or replace the high volt-
age parts, cables or their con-
nectors.
●The hybrid system will become
hot after starting as the system
uses high voltage. Be careful of
both the high voltage and the
high temperature, and always
obey the warning labels
attached to the vehicle.
●Never try to open the service
plug access hole located under
the right side o f the rear seat.
The service plug is used only
when the vehicle is serviced
and is subject to high voltage.
■Road accident cautions
Observe the following precautions
to reduce the risk of death or seri-
ous injury:
●Stop the vehicle in a safe place
to prevent subsequent acci-
dents. While depressing the
brake pedal, apply the parking
brake and shift the shift lever to
P to stop the hybrid system.
Then, slowly release the brake
pedal

1864-1. Before driving
Owners Manual_USA_M0C052_en
Certification Label. (P.541)
 If the gross trailer weight is
over the unbraked TWR,
trailer service brakes are
required.
 If the gross trailer weight is
over 2000 lb. (907 kg), a sway control device with sufficient
capacity is required.
 If the gross trailer weight is
over 5000 lb. (2268 kg), a
weight distributing hitch with
sufficient capacity is required.
Confirm that the gross trailer we ight, gross combination weight,
gross vehicle weight, gross axle weight and tongue weight are all
within the limits.
■GCWR* and TWR*
*1: The model code is indicated o n the Certification Label. (P.541)
■Unbraked TWR*
1000 lb. (453 kg)
*: These models meet the tow-vehicle trailering requirement of SA E Interna-
tional per SAE J2807.
GCWR, TWR, Unbraked TWR, Fifth wheel and Goose-
neck towing TWR
Model code*1GCWRTWR
VXKH70L-PSVLZA17770 lb. (8030 kg)11450 lb. (5190 kg)
VXKH70L-PSVZZA17770 lb. (8030 kg)11380 lb. (5160 kg)
VXKH71L-PRVLZA17770 lb. (8030 kg)11350 lb. (5145 kg)
VXKH71L-PRVZZA17770 lb. (8030 kg)11290 lb. (5120 kg)
VXKH75L-PSVLZA17770 lb. (8030 kg)11170 lb. (5065 kg)
VXKH75L-PSVUZA17000 lb. (7710 kg)10340 lb. (4690 kg)
VXKH75L-PSVZZA17600 lb. (7980 kg)11020 lb. (4995 kg)
VXKH76L-PRVLZA17770 lb. (8030 kg)11040 lb. (5005 kg)
VXKH76L-PRVZZA17770 lb. (8030 kg)10960 lb. (4970 kg)

3874-5. Using the driving support systems
Owners Manual_USA_M0C052_en
4
Driving
*: If equipped
■Automatic operating conditions
●The active front sp oiler will acti-
vate automatically as follows
according:
Always observe the legal speed limit
when driving on public roads.
●Automatically operates when the
outside temperature is 40°F (5°C)
and above.
●Automatically stows when in Tow
mode.
●Automatically stows when in “4H”
mode or “4L” mode. (If equipped)
When there is a malfunction in the
system, avoid high speed driving
and have the vehicl e inspected by
your Toyota dealer.
It is necessary to deploy the
Active front spoiler to remove
the engine under cover for main-
tenance.
■Lowering the active front
spoiler to the service posi-
tion
Within approximately 45 sec-
onds of turning the power switch
off, move the wiper lever to the
*1 or *2 position and
hold it for approximately 2 sec-
onds or more.
The active front spoiler will
move to the service position.
*1: U.S.A.
*2: Canada
Active front spoiler*
The equipped active front
spoiler operates automati-
cally while the vehicle is
being driven. This active
front spoiler enhances aero-
dynamic performance espe-
cially at high speeds,
contributing to a more sta-
ble ride.
ConditionsSpeed mph (km/h)
DeployOver 37 (60)
RetractUnder 25 (40)
NOTICE
■To prevent s ystem damage
●Do not attach any accessories
or other foreign objects to the
active front spoiler.
●Do not modify or disassemble
the active front spoiler.
●Do not subject the active front
spoiler to severe impacts.
Manually deploying the
active front spoiler

3924-6. Driving tips
Owners Manual_USA_M0C052_en
off-road vehicles:
Drive your vehicle only in
areas where off-road vehicles
are permitted to travel.
 Respect private property. Get
owner’s permission before
entering private property.
 Do not enter areas that are
closed. Honor gates, barriers
and signs that restrict travel.
 Stay on established roads.
When conditions are wet,
driving techniques should be
changed or travel delayed to
prevent damage to roads.
■Additional information for
off-road driving
For owners in U.S. mainland,
Hawaii and Puerto Rico:
To obtain additional information
pertaining to driving your vehicle
off-road, consult the following
organizations.
 State and Local Parks and
Recreation Departments
 State Motor Vehicle Bureau
 Recreational Vehicle Clubs
 U.S. Forest Service and
Bureau of Land Management
WARNING
■Off-road driving precautions
Always observe the following pre-
cautions to minimize the risk of
death, serious injury or damage to
your vehicle:
●Drive carefully when off the
road. Do not take unnecessary
risks by driving in dangerous
places.
●Do not grip the steering wheel
spokes when driving off-road. A
bad bump could jerk the wheel
and injure your hands. Keep
both hands and especially your
thumbs on the ou tside of the
rim.
●Always check your brakes for
effectiveness immediately after
driving in sand, mud, water or
snow.
●After driving through tall grass,
mud, rock, sand, rivers, etc.,
check that there is no grass,
bush, paper, rags, stone, sand,
etc. adhering or trapped on the
underbody. Clear off any such
matter from the underbody. If
the vehicle is used with these
materials trapped or adhering to
the underbody, a breakdown or
fire could occur.
●In a rollover crash, an unbelted
person is significantly more
likely to die than a person wear-
ing a seat belt. Therefore, the
driver and all passengers
should fasten their seat belts
whenever the vehicle is moving.
●When driving off-road or in rug-
ged terrain, do not drive at
excessive speeds, jump, make
sharp turns, strike objects, etc.
This may cause loss of control
or vehicle rollover causing
death or serious injury. You are
also risking expensive damage
to your vehicle’s suspension
and chassis.

3944-6. Driving tips
Owners Manual_USA_M0C052_en
Use fluids that are appropriate
to the prevailing outside tem-
peratures.
• Engine oil
• Engine/power control unit coolant
• Washer fluid
Have a service technician
inspect the condition of the
12-volt battery.
 Have the vehicle fitted with
four snow tires or purchase a
set of tire chains for the rear
tires
*.
*: Tire chains cannot be mounted
on 285/65R18 tires.
Ensure that all tires are the same
size and brand, and that chains
match the size of the tires.
Winter driving tips
Carry out the necessary
preparations and inspec-
tions before driving the
vehicle in winter. Always
drive the vehicle in a man-
ner appropriate to the pre-
vailing weather conditions.
Preparation for winter
WARNING
■Driving with snow tires
Observe the following precautions
to reduce the risk of accidents.
Failure to do so m ay result in a
loss of vehicle control and cause
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 (vehi-
cles without 285/65R18 tires)
Observe the following precautions
to reduce the risk of accidents.
Failure to do so may result in the
vehicle being unable to be driven
safely, and may cause death or
serious injury.
●Do not drive in excess of the
speed limit specifi ed for the tire
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 brak-
ing and shifting operations that
cause sudden engine braking.
●Slow down sufficiently before
entering a curve to ensure that
vehicle control is maintained.
●Do not use LTA (Lane Tracing
Assist) (if equipped) system.

4035-1. Using the air conditioning system and defogger
Owners Manual_USA_M0C052_en
5
Interior features
■Air conditioning system refrig-
erant
●A label regarding the refrigerant of
the air conditioning system is
attached to the ho od at the loca-
tion shown in the f ollowing illustra-
tion.
●The meaning of each symbol on
the label are as follows:
■Customization
Some functions can be customized.
(Customizable features: P.569)
1 Operate the “AUTO” toggle.
2 Adjust the temperature set-
ting.
3 To stop the operation, press
the “OFF” switch.
If the fan speed setting or air
Caution
Air conditioning sys-
tem
Air conditioning sys-
tem lubricant type
Requires registered
technician to service
air conditioning sys-
tem
Flammable refrigerant
WARNING
■To prevent the windshield
from fogging up
Do not use the windshield defog-
ger switch during cool air opera-
tion in extremely humid weather.
The difference between the tem-
perature of the outside air and
that of the windshield can cause
the outer surface of the wind-
shield to fog up, blocking your
vision.
■When the outside rear view
mirror defoggers are operat-
ing
Do not touch the rear view mirror
surfaces when the outside rear
view mirror def oggers are on.
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the air conditioning
system on longer than necessary
when the hybrid system is off.
■When repairing/replacing
parts of the air conditioning
system
Have repair/replacement per-
formed by your Toyota dealer.
When a part of the air conditioning
system, such as the evaporator, is
to be replaced, it must be
replaced with a new one.
Using automatic mode

441
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6
Maintenance and care
Maintenance and care
6-1. Maintenance and careCleaning 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) pro-
grams ........................ 452
6-3. Do-it-yourself mainte- nance
Do-it-yourself service pre- cautions ..................... 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

4486-2. Maintenance
Owners Manual_USA_M0C052_en
6-2.Maintenance
■Repair and replacement
It is recommended that genuine
Toyota parts be used for repairs to
ensure performanc e of each sys-
tem. If non-Toyota parts are used in
replacement or if a repair shop other
than a Toyota dealer performs
repairs, confirm the warranty cover-
age.
■Allow inspection and repairs to
be performed by a Toyota
dealer
●Toyota technicians are well-
trained specialists and are kept up
to date with the latest service
information. They are well
informed about the operation of all
systems on your vehicle.
●Keep a copy of the repair order. It
proves that the maintenance that
has been performed is under war-
ranty coverage. If any problem
should arise while your vehicle is
under warranty, your Toyota
dealer will promptly take care of it.
General maintenance should be
performed on a daily basis. This
can be done by yourself or by a
Toyota dealer.
Scheduled maintenance should
be performed at specified inter-
vals according to the mainte-
nance schedule.
For details about maintenance
items and schedules, refer to the
“Scheduled Maintenance Guide” or
“Owner’s Manual Supplement”.
Maintenance require-
ments
To ensure safe and econom-
ical driving, day-to-day care
and regular maintenance
are essential. It is the
owner’s responsibility to
perform regular checks.
Toyota recommends the
maintenance below.
WARNING
■If your vehicle is not properly
maintained
Improper maintenance could
result in serious damage to the
vehicle and possible death or seri-
ous injury.
■Handling of the 12-volt bat-
tery
●Engine exhaust, some of its
constituents, and a wide variety
of automobile components con-
tain or emit chemicals known to
the State of California to cause
cancer and birth defects and
other reproductive harm. Work
in a well ventilated area.
●Oils, fuels and fluids contained
in vehicles as well as waste pro-
duced by component wear con-
tain or emit chemicals known to
the State of California to cause
cancer and birth defects or
other reproductive harm. Avoid
exposure and wash any
affected area immediately.
●12-volt battery posts, terminals
and related accessories con-
tain lead and lead compounds
which are known to cause brain
damage. Wash your hands after
handling. ( P.463)
General maintenance
Scheduled maintenance