TOYOTA TUNDRA HYBRID 2023 Owners Manual

4836-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
6
Maintenance and care
ing it.
7 Install the air intake vent
cover.
1 Insert the tab of the cover as
shown in the illustration.
2 Push the cover to engage the
2 claws.
If “Maintenance Required for
Traction Battery Cooling Parts
See Owner’s Manual” was
displayed on the multi-infor-
mation display
8 Start the hybrid system and
check that the warning mes-
sage is no longer displayed.
It may take approximately 20 min-
utes after the hybrid system is
started until the warning message
disappears.
If the warning message does not
disappear after some time, have
the vehicle inspected by your Toy-
ota dealer.
■If the dust or sand on the filter
cannot be removed
It is recommended to use a vacuum
cleaner with plastic brushes.
WARNING
■When cleaning the air intake
vent
●Do not use water or other liq-
uids to clean the air intake vent.
If water is applied to the hybrid
battery (traction battery) or
other components, a malfunc-
tion or fire may occur.
●Before cleaning the air intake
vent, make sure to turn the
power switch off to stop the
hybrid system.
●Do not put a han d or leg in the
air intake vent. If it is caught in a
cooling fan, or if it touches a
high voltage part that results in
an electric shock, death or seri-
ous injuries may result.
●Do not touch the service plug
located near the air intake vent.
(  P. 7 7 )
NOTICE
■When cleaning the air intake
vent
Do not use an ai r blow gun, etc.
Dust may be blown out, possibly
causing a malfunction or output
restriction of the hybrid battery
(traction battery).

4846-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
■If the electronic key battery is
depleted
The following symptoms may occur:
●The smart key system and wire-
less remote control will not func-
tion properly.
●The operational range will be
reduced.
 Flathead screwdriver
 Small flathead screwdriver
 Lithium battery CR2450
■Use a CR2450 lithium battery
●Batteries can be purchased at
your Toyota dealer, local electrical
appliance shops or camera stores.
●Replace only with the same or
equivalent type recommended by
the manufacturer.
●Dispose of used batteries accord-
ing to local laws.
NOTICE
■To prevent damage to the
vehicle
Observe the following precau-
tions:
●Do not allow water or foreign
matter to enter t he air intake
vent.
●Make sure to reinstall the filter
and cover to their original posi-
tions after cleaning.
●Do not install anything to the air
intake vent other than the exclu-
sive filter for this vehicle or use
the vehicle without the filter
installed.
■To prevent damage to the fil-
ter
Observe the following precau-
tions.
If the filter is damaged, have it
replaced with a new filter by your
Toyota dealer.
●Do not use an air blow gun, etc.
●Do not press hard a vacuum
cleaner, etc. against the filter.
●Do not use a hard brush, such
as a metal brush.
●Do not break the fold of the fil-
t er.
Electronic key batter y
Replace the battery with a
new one if it is depleted.
As the key may be damaged
if the following procedure is
not performed properly, it is
recommended that key bat-
tery replacement be per-
formed by your Toyota
dealer.
Items to prepare

4856-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
6
Maintenance and care
1 Take out the mechanical key.
2 Remove the cover.
To prevent damage to the key,
cover the tip of the flathead screw-
driver with a tape.
3Remove the depleted battery.
Insert a new battery with the “+” ter-
minal facing up.
Replacing the batteryWARNING
■Removed battery and other
parts
These parts are small and if swal-
lowed by a child, they can cause
choking. Keep away from chil-
dren. Failure to do so could result
in death or serious injury.
■Battery precautions
Observe the following precau-
tions.
Failure to do so may result in
death or serious injury.
●Do not swallow the battery.
Doing so may cause chemical
burns.
●A coin battery or button battery
is used in the electronic key. If a
battery is swa llowed, it may
cause severe chemical burns in
as little as 2 hours and may
result in death or serious injury.
●Keep away new and removed
batteries from children.
●If the cover cannot be firmly
closed, stop using the electronic
key and stow the key in the
place where children cannot
reach, and then contact your
Toyota dealer.
●If you accidentally swallow a
battery or put a battery into a
part of your b ody, get emer-
gency medical attention imme-
diately.
■To prevent battery explosion
or leakage of flammable liq-
uid or gas
●Replace the battery with a new
battery of the same type. If a
wrong type of battery is used, it
may explode.

4866-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
1Turn the power switch off.
2 Open the fuse box cover.
Engine compartment: type A
fuse box
Push the tabs in and lift the lid off.
Engine compartment: type B
fuse box
Push the tabs in and lift the lid off.
WARNING
●Do not expose batteries to
extremely low pressure due to
high altitude or extremely high
temperatures.
●Do not burn, bre ak or cut a bat-
tery.
NOTICE
■When replacing the battery
Use a flathead screwdriver of
appropriate size. Applying exces-
sive force may deform or damage
the cover.
■For normal operation after
replacing the battery
Observe the following precautions
to prevent accidents:
●Always work with dry hands.
Moisture may cau se the battery
to rust.
●Do not touch or move any other
component inside the remote
control.
●Do not bend either of the battery
terminals.
Checking a nd replac-
ing fuses
If any of the electrical com-
ponents do not operate, a
fuse may have blown. If this
happens, check and replace
the fuses as necessary.
Checking and replacing
fuses

4876-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
6
Maintenance and care
Passenger’ side instrument
panel
Remove the cover.
Vehicles with footwell lights:
Remove the footwe ll lights connec-
tor.
Remove the lid.
Make sure to push the claw when
removing/installing the lid.
Under the right-hand rear seat
Lift the rear seat cushion. ( P.135)
Remove the cover.
3 Remove the fuse with the
pullout tool.
Only type A fuse can be

4886-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
removed using the pullout
tool.
4 Check if the fuse is blown.
Type A and B:
Replace the blown fuse with a new
fuse of an appropriate amperage
rating. The amperage rating can be
found on the fuse box lid.
Type C and D:
Contact your Toyota dealer.
Ty p e A
Normal fuse
Blown fuse
Ty p e B Normal fuse
Blown fuse
Type C
Normal fuse
Blown fuse
Type D
Normal fuse
Blown fuse
■After a fuse is replaced
●When installing the lid, make sure
that the tab is ins talled securely.
●If the lights do not turn on even
after the fuse has been replaced,
a bulb may need replacement.
●If the replaced fuse blows again,
have the vehicle inspected by
your Toyota dealer.
■If there is an ove rload in a cir-
cuit
The fuses are designed to blow, pro-

4896-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
6
Maintenance and care
tecting the wiring harness from
damage.
■When replacing light bulbs
Toyota recommends that you use
genuine Toyota products designed
for this vehicle.
Because certain bulbs are con-
nected to circuits designed to pre-
vent overload, non-genuine parts or
parts not designed for this vehicle
may be unusable.
Check the wattage of the light
bulb to be replaced. ( P.548)
Front turn signal/parking
lights (bulb type)
WARNING
■To prevent system break-
downs and vehicle fire
Observe the following precau-
tions.
Failure to do so may cause dam-
age to the vehicle, and possibly a
fire or injury.
●Never use a fuse of a higher
amperage rating than that indi-
cated, or use any other object in
place of a fuse.
●Always use a genuine Toyota
fuse or equivalent.
Never replace a fuse with a
wire, even as a temporary fix.
●Do not modify the fuses or fuse
boxes.
NOTICE
■Before replacing fuses
Have the cause of electrical over-
load determined and repaired by
your Toyota dealer as soon as
possible.
Light bulbs
You may replace the follow-
ing bulb by yourself. If nec-
essary bulb replacement
seems difficult to perform,
contact your Toyota dealer.
For more information about
replacing other lights, con-
tact your Toyota dealer.
Preparing for light bulb
replacement
Bulb location

4906-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
■Lights that need to be
replaced by your Toyota
dealer
 Headlights
 Daytime running lights
 Front turn signal/parking lights
(LED type)
 Front fog lights
 Side marker lights
 Side turn signal lights
 Trailering light (if equipped)
 Tail lights
 Stop lights
 Back-up light
 Rear turn signal lights
 High mounted stoplight/cargo
lamp
 Trailer hitch light (if equipped)
 Bed lamp (if equipped)
 Auxiliary lights (if equipped)
 Light bar (if equipped)
 Arch molding marker lights (if
equipped)
■When replacing the light bulbs
Confirm that they are properly
engaged with the bulb base and that
there is no light leakage.
■LED Lights
The lights other th an front turn sig-
nal/parking lights (bulb type) consist
of a number of LEDs. If any of the
LEDs burn out, take your vehicle to
your Toyota dealer to have the light
replaced.
■Condensation build-up on the
inside of the lens
Temporary condensation build-up
on the inside of t he headlight lens
does not indicate a malfunction.
Contact your Toyota dealer for more
information in t he following situa-
tions:
●Large drops of water have built up
on the inside of the lens.
●Water has built up inside the
headlight.
■When replacing light bulbs
 P.489
■Front turn signal/parking
lights (bulb type)
1 To allow enough working
space, turn the steering
wheel to the opposite side of
the bulb to be replaced.
Remove the screws, and
remove the fender liner.
Turn the steering wheel to the left
when replacing the right side light
bulb, and turn the steering wheel to
the right when replacing the left
side light bulb.
Replacing light bulb

4916-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
6
Maintenance and care
2 Open the fender liner and
turn the bulb base counter-
clockwise.
3 Remove the light bulb.
4 Install a new light bulb and
turn the bulb base clockwise. 5
Reinstall the fender liner and
install the screws.
WARNING
■Replacing light bulbs
●Turn off the lights. Do not
attempt to replace the bulb
immediately after turning off the
lights. The bulbs become very
hot and may cause burns.
●Do not touch the glass portion
of the light bulb with bare
hands.
When it is unavoidable to hold
the glass portion, use and hold
with a clean dry cloth to avoid
getting moisture and oils on the
bulb. Also, if the bulb is
scratched or dropped, it may
blow out or crack.
●Fully install light bulbs and any
parts used to secure them. Fail-
ure to do so may result in heat
damage, fire, or water entering
the light unit. This may damage
the lights or cause condensa-
tion to build up on the lens.

4926-3. Do-it-yourself maintenance
Owners Manual_USA_M0C052_en
WARNING
●Do not attempt to repair or dis-
assemble light bulbs, connec-
tors, electric circuits or
component parts.
Doing so may result in death or
serious injury due to electric
shock.
■To prevent damage or fire
Make sure bulbs are fully seated
and locked.