Toyota Tundra (2023 year). Manual in english - page 29

• FMVSS No.116

DOT 3 or SAE
J1703 brake fluid
FMVSS No.116
DOT 4 or SAE
J1704 brake fluid

• Rag or paper

towel

• Funnel (used

only for adding
brake fluid)

Engine cool-
ant/intercooler
coolant level
(



• “Toyota Super

Long Life Cool-
ant” or a similar
high quality eth-
ylene glycol-
based non-sili-
cate, nonamine,
non-nitrite and
non-borate cool-
ant with longlife
hybrid organic
acid technology
For the U.S.A.:
“Toyota Super
Long Life Cool-
ant” is pre-mixed
with 50% cool-
ant and 50%
deionized water.
For Canada:
“Toyota Super
Long Life Cool-
ant” is pre-mixed
with 55% cool-
ant and 45%
deionized water.

• Funnel (used

only for adding
coolant)

Engine oil level
(



P.470)

• “Toyota Genuine

Motor Oil” or
equivalent

• Rag or paper

towel

• Funnel (used

only for adding
engine oil)

Fuses
(



P.494)

• Fuse with same

amperage rating
as original

Items

Parts and tools

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6-3. Do-it-yourself maintenance

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Light bulbs
(

P.499)

• Bulb with same

number and
wattage rating as
original

• Phillips-head

screwdriver

• Wrench

Radiator and
condenser
(



Tire inflation
pressure
(

P.487)

• Tire pressure

gauge

• Compressed air

source

Washer fluid
(

P.476)

• Water or washer

fluid containing
antifreeze (for
winter use)

• Funnel (used

only for adding
water or washer
fluid)

WARNING

The engine compartment contains

many mechanisms and fluids that

may move suddenly, become hot,

or become electrically energized.

To avoid death or serious injury,

observe the following precautions.

■

When working on the engine

compartment

●

Keep hands, clothing and tools

away from the moving fan and

engine.

●

Be careful not to touch the

engine, inverter, radiator,

exhaust manifold, etc., right

after driving as they may be hot.

Oil and other fluids may also be

hot.

Items

Parts and tools

●

Do not leave anything that may

burn easily, such as paper and

rags, in the engine compart-

ment.

●

Do not smoke, cause sparks or

expose an open flame to gaso-

line or the battery. Gasoline and

battery fumes are flammable.

●

Be extremely cautious when

working on the battery. It con-

tains poisonous and corrosive

sulfuric acid.

■

When working near the elec-

tric cooling fan or radiator

grille

Be sure the engine switch is off.

With the engine switch in ON, the

electric cooling fan may automati-

cally start to run if the air condi-

tioning is on and/or the coolant

temperature is high. (



■

Safety glasses

Wear safety glasses to prevent

flying or falling material, fluid

spray, etc., from getting in your

eyes.

NOTICE

■

If you remove the air cleaner

filter

Driving with the air cleaner filter

removed may cause excessive

engine wear due to dirt in the air.

469

6-3. Do-it-yourself maintenance

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Fuse boxes (

Battery (

Intercooler coolant reservoir (

Engine coolant reservoir (



Engine oil filler cap (

P.470)

Engine oil level dipstick (

P.470)

Brake fluid reservoir (



Intercooler radiators (



Engine radiator (



Condenser (



Cooling fan (



Washer fluid tank (



P.476)

Engine compartment

Components

470

6-3. Do-it-yourself maintenance

With the engine at operating
temperature and turned off,
check the oil level on the dip-
stick.

■

Checking the engine oil

Park the vehicle on level
ground. After warming up the
engine and turning off the
engine, wait more than 5
minutes for the oil to drain
back into the bottom of the
engine.

Holding a rag under the end,
pull the dipstick out.

Wipe the dipstick clean.

Reinsert the dipstick fully with
its protruding areas ( in the

illustration) pointing towards
engine.

Holding a rag under the end,
pull the dipstick out and
check the oil level.

Low

Normal

Excessive

Wipe the dipstick and reinsert
it fully.

■

Checking the oil type and
preparing the items needed

Make sure to check the oil type
and prepare the items needed
before adding oil.



Engine oil selection



P.549



Oil quantity (Low



Full)

1.6 qt. (1.5 L, 1.3 Imp.qt.)

Checking and adding the
engine oil

471

6-3. Do-it-yourself maintenance

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

Items

Clean funnel

■

Adding engine oil

If the oil level is below or near
the low level mark, add engine
oil of the same type as that
already in the engine.

Remove the oil filler cap by
turning it counterclockwise.

Add engine oil slowly, check-
ing the dipstick.

Install the oil filler cap by
turning it clockwise.

■

Engine oil consumption

A certain amount of engine oil will

be consumed while driving. In the

following situations, oil consump-

tion may increase, and engine oil

may need to be refilled in between

oil maintenance intervals.

●

When the engine is new, for

example directly after purchasing

the vehicle or after replacing the

engine

●

If low quality oil or oil of an inap-

propriate viscosity is used

●

When driving at high engine

speeds or with a heavy load,

when towing, or when driving

while accelerating or decelerating

frequently

●

When leaving the engine idling for

a long time, or when driving fre-

quently through heavy traffic

■

After changing the engine oil

The engine oil maintenance data

should be reset. Perform the follow-

ing procedures:

Press

of the meter

control switches and select

Press

of the meter

control switches, select the
“Vehicle Settings” and then press

Press

of the meter

control switches, select the “Oil
Maintenance” and then press

Select the “Yes” and push

“Reset Complete” is displayed
on the multi-information display.

WARNING

■

Used engine oil

●

Used engine oil contains poten-

tially harmful contaminants

which may cause skin disorders

such as inflammation and skin

cancer, so care should be taken

to avoid prolonged and

repeated contact. To remove

used engine oil from your skin,

wash thoroughly with soap and

water.

●

Dispose of used oil and filters

only in a safe and acceptable

manner. Do not dispose of used

oil and filters in household trash,

in sewers or onto the ground.

Call your Toyota dealer, service

station or auto parts store for

information concerning recy-

cling or disposal.

●

Do not leave used engine oil

within the reach of children.

472

6-3. Do-it-yourself maintenance

The coolant level is satisfactory
if it is between the “F” and “L”
lines on the reservoir when the
engine is cold.



Engine coolant

Engine coolant reservoir cap

“F” line

“L” line

If the level is on or below the “L”
line, add coolant up to the “F” line.

(



P.541)



Intercooler coolant

Intercooler coolant reservoir
cap

“F” line

“L” line

If the level is on or below the “L”
line, add coolant up to the “F” line.
(



P.541)

■

Coolant selection

Only use “Toyota Super Long Life

Coolant” or a similar high quality

ethylene glycol based non-silicate,

non-amine, non-nitrite, and non-

borate coolant with long-life hybrid

organic acid technology.
U.S.A.:“Toyota Super Long Life

Coolant” is a mixture of 50% coolant

and 50% deionized water.
(Minimum temperature: -31°F [-

35°C])
Canada: “Toyota Super Long Life

Coolant” is a mixture of 55% coolant

and 45% deionized water.
(Minimum temperature: -44°F [-

42°C])
For more details about coolant, con-

tact your Toyota dealer.

■

If the coolant level drops within

a short time of replenishing

Visually check the radiator, hoses,

engine coolant reservoir cap, inter-

coolant reservoir cap, drain cock

NOTICE

■

To prevent serious engine

damage

Check the oil level on a regular

basis.

■

When replacing the engine oil

●

Be careful not to spill engine oil

on the vehicle components.

●

Avoid overfilling, or the engine

could be damaged.

●

Check the oil level on the dip-

stick every time you refill the

vehicle.

●

Be sure the engine oil filler cap

is properly tightened.

Checking the
engine/intercooler cool-
ant

473

6-3. Do-it-yourself maintenance

Maintena

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and water pump.
If you cannot find a leak, have your

Toyota dealer test the cap and

check for leaks in the cooling sys-

tem.

Check the engine radiator, con-
denser and intercooler radiators
and clear away any foreign
objects. If either of the above
parts is extremely dirty or you
are not sure of their condition,
have your vehicle inspected by
your Toyota dealer.

■

Checking fluid level

The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.

Brake fluid reservoir cap

“MAX” line

“MIN” line

■

Adding fluid

Make sure to check the fluid
type and prepare the necessary
item.



Fluid type

FMVSS No.116 DOT 3 or SAE
J1703 brake fluid
FMVSS No.116 DOT 4 or SAE
J1704 brake fluid



Item

Clean funnel

WARNING

■

When the engine is hot

Do not remove the engine coolant

reservoir and the intercooler cool-

ant reservoir cap.

The cooling system may be under

pressure and may spray hot cool-

ant if the cap is removed, causing

serious injuries, such as burns.

NOTICE

■

When adding coolant

Coolant is neither plain water nor

straight antifreeze. The correct

mixture of water and antifreeze

must be used to provide proper

lubrication, corrosion protection

and cooling. Be sure to read the

antifreeze or coolant label.

■

If you spill coolant

Be sure to wash it off with water to

prevent it from damaging parts or

paint.

Checking the engine radi-
ator, condenser and inter-
cooler radiators

WARNING

■

When the engine is hot

Do not touch the engine radiator,

condenser or intercooler radia-

tors or condenser as they may be

hot and cause serious injuries,

such as burns.

Checking and adding the
brake fluid

474

6-3. Do-it-yourself maintenance

■

Brake fluid can absorb moisture

from the air

Excess moisture in the brake fluid

can cause a dangerous loss of brak-

ing efficiency. Use only newly

opened brake fluid.

Check the battery as follows.

■

Battery exterior

Make sure that the battery termi-
nals are not corroded and that
there are no loose connections,
cracks, or loose clamps.

Terminals

Hold-down clamp

Bracket

■

Checking battery fluid

Check that the fluid level is
between the “UPPER LEVEL” or
“LOWER LEVEL” lines.

“UPPER LEVEL” line

“LOWER LEVEL” line

Add distilled water before the fluid
level drops below the “LOWER
LEVEL” line.

■

Adding distilled water

Remove the vent plug.

Add distilled water.

If the “UPPER LEVEL” line cannot

be seen, check the fluid level by

WARNING

■

When filling the reservoir

Take care as brake fluid can harm

your hands and eyes and damage

painted surfaces.

If fluid gets on your hands or in

your eyes, flush the affected area

with clean water immediately.
If you still experience discomfort,

see a doctor.

NOTICE

■

If the fluid level is low or high

It is normal for the brake fluid level

to go down slightly as the brake

pads wear out or when the fluid

level in the accumulator is high.

If the reservoir needs frequent

refilling, there may be a serious

problem.

Checking the battery

475

6-3. Do-it-yourself maintenance

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looking directly into the cell.

LOW

O.K.

Put the vent plug back on
and close it securely.

■

Before recharging

When recharging, the battery pro-

duces hydrogen gas which is flam-

mable and explosive. Therefore,

observe the following precautions

before recharging:

●

If recharging with the battery

installed on the vehicle, be sure to

disconnect the ground cable.

●

Make sure the power switch on

the charger is off when connecting

and disconnecting the charger

cables to the battery.

■

After recharging/reconnecting

the battery

The engine may not start. Follow the

procedure below to initialize the sys-

tem.

Shift the shift lever to P.

Open and close any of the doors.

Restart the engine.

●

Unlocking the doors using the

smart key system may not be pos-

sible immediately after reconnect-

ing the battery. If this happens,

use the wireless remote control or

the mechanical key to lock/unlock

the doors.

●

Start the engine with the engine

switch in ACC. The engine may

not start with the engine switch

turned off. However, the engine

will operate normally from the sec-

ond attempt.

●

The engine switch mode is

recorded by the vehicle. If the bat-

tery is disconnected and recon-

nected, the vehicle will return the

engine switch mode to the status it

was in before the battery was dis-

connected. Make sure to turn off

the engine switch before discon-

necting the battery. Take extra

care when connecting the battery

if the engine switch mode prior to

the battery being disconnected is

unknown.

If the engine will not start even after
multiple attempts, contact your Toy-
ota dealer.

WARNING

■

Chemicals in the battery

A battery contains poisonous and

corrosive sulfuric acid and may

produce hydrogen gas which is

flammable and explosive. To

reduce the risk of death or serious

injury, take the following precau-

tions while working on or near the

battery:

●

Do not cause sparks by touch-

ing the battery terminals with

tools.

●

Do not smoke or light a match

near the battery.

●

Avoid contact with eyes, skin

and clothes.

●

Never inhale or swallow electro-

lyte.

●

Wear protective safety glasses

when working near the battery.

●

Keep children away from the

battery.

476

6-3. Do-it-yourself maintenance

If any washer does not work the
washer tank may be empty. Add
washer fluid.

WARNING

■

Where to safely charge the

battery

Always charge the battery in an

open area. Do not charge the bat-

tery in a garage or closed room

where there is not sufficient venti-

lation.

■

Emergency measures regard-

ing electrolyte

●

If electrolyte gets in your eyes

Flush your eyes with clean

water for at least 15 minutes

and get immediate medical

attention. If possible, continue

to apply water with a sponge or

cloth while traveling to the near-

est medical facility.

●

If electrolyte gets on your skin

Wash the affected area thor-

oughly. If you feel pain or burn-

ing, get medical attention

immediately.

●

If electrolyte gets on your

clothes

It can soak through clothing on

to your skin. Immediately take

off the clothing and follow the

procedure above if necessary.

●

If you accidentally swallow elec-

trolyte

Drink a large quantity of water

or milk. Get emergency medical

attention immediately.

■

When there is insufficient bat-

tery fluid

Do not use if there is insufficient

fluid in the battery. There is a pos-

sible danger that the battery may

explode.

NOTICE

■

When recharging the battery

Never recharge the battery while

the engine is running. Also, be

sure all accessories are turned

off.

■

When adding distilled water

Avoid overfilling. Water spilled

during battery recharging may

cause corrosion.

Adding the washer fluid

WARNING

■

When adding washer fluid

Do not add washer fluid when the

engine is hot or operating as

washer fluid contains alcohol and

may catch fire if spilled on the

engine, etc.

477

6-3. Do-it-yourself maintenance

Maintena

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Check if the treadwear indica-
tors are showing on the tires.
Also check the tires for uneven
wear, such as excessive wear
on one side of the tread.
Check the spare tire condition
and pressure if not rotated.

New tread

Worn tread

Treadwear indicator

The location of treadwear indicators

NOTICE

■

Do not use any fluid other

than washer fluid

Do not use soapy water or anti-

freeze instead of washer fluid.

Doing so may cause streaking on

the vehicle’s painted surfaces, as

well as damaging the pump lead-

ing to problems of the washer

fluid not spraying.

■

Diluting washer fluid

Dilute washer fluid with water as

necessary.

Refer to the freezing tempera-

tures listed on the label of the

washer fluid bottle.

Tires

Replace or rotate tires in
accordance with mainte-
nance schedules and tread-
wear.

Checking tires

478

6-3. Do-it-yourself maintenance

is shown by a “TWI” or “

” mark,

etc., molded into the sidewall of
each tire.
Replace the tires if the treadwear
indicators are showing on a tire.

■

When to replace your vehicle’s

tires

Tires should be replaced if:

●

The treadwear indicators are

showing on a tire.

●

You have tire damage such as

cuts, splits, cracks deep enough

to expose the fabric, and bulges

indicating internal damage

●

A tire goes flat repeatedly or can-

not be properly repaired due to the

size or location of a cut or other

damage

If you are not sure, consult with your

Toyota dealer.

■

Tire life

Any tire over 6 years old must be

checked by a qualified technician

even if it has seldom or never been

used, or damage is not obvious.

■

Maximum load of tire

Check that the number given by

dividing the maximum load by 1.10

of the replacement tire is greater

than 1/2 of the Gross Axle Weight

Ratings (GAWR) of either the front

axle or the rear axle, whichever is

greater.
For the GAWR, see the Certification

Label.

For the maximum load of the tire,

see the load limit at maximum cold

tire inflation pressure mentioned on

the sidewall of the tire. (



P.557)

■

Tire types

●

Summer tires

Summer tires are high-speed perfor-
mance tires best suited to highway
driving under dry conditions. Since
summer tires do not have the same
traction performance as snow tires,
summer tires are inadequate for
driving on snow-covered or icy
roads. For driving on snow-covered
roads or icy roads, the use of snow
tires is recommended. When install-
ing snow tires, be sure to replace all
four tires.

●

All season tires

All season tires are designed to pro-
vide better traction in snow and to
be adequate for driving in most win-
ter conditions as well as for use
year-round. All season tires, how-
ever, do not have adequate traction
performance compared with snow
tires in heavy or loose snow. Also,
all season tires fall short in accelera-
tion and handling performance com-
pared with summer tires in highway
driving.

●

Snow tires

For driving on snow-covered roads
or icy roads, we recommend using
snow tires. If you need snow tires,
select tires of the same size, con-
struction and load capacity as the
originally installed tires. Since your
vehicle has radial tires as original
equipment, make sure your snow

479

6-3. Do-it-yourself maintenance

Maintena

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tires also have radial construction.
Do not install studded tires without
first checking local regulations for
possible restrictions. Snow tires
should be installed on all wheels.
(

P.408)

■

If the tread on snow tires wears

down below 0.16 in. (4 mm)

The effectiveness of the tires as

snow tires is lost.

Rotate the tires in the order
shown.

Front

To equalize tire wear and extend
tire life, Toyota recommends that
tire rotation is carried out at the
same interval as tire inspection.
Do not fail to initialize the tire pres-
sure warning system after tire rota-
tion.

Your vehicle is equipped with a
tire pressure warning system
that uses tire pressure warning
valves and transmitters to detect

WARNING

■

When inspecting or replacing

tires

Observe the following precautions

to prevent accidents.

Failure to do so may cause dam-

age to parts of the drive train as

well as dangerous handling char-

acteristics, which may lead to an

accident resulting in death or seri-

ous injury.

●

Do not mix tires of different

makes, models or tread pat-

terns.

Also, do not mix tires of remark-

ably different treadwear.

●

Do not use tire sizes other than

those recommended by Toyota.

●

Do not mix differently con-

structed tires (radial, bias-belted

or bias-ply tires).

●

Do not mix summer, all season

and snow tires.

●

Do not use tires that have been

used on another vehicle.

Do not use tires if you do not

know how they were used previ-

ously.

●

Do not use tires with different

load rating and/ or speed sym-

bol than what is specified on tire

pressure label or in owner’s

manual.

NOTICE

■

Driving on rough roads

Take particular care when driving

on roads with loose surfaces or

potholes.

These conditions may cause

losses in tire inflation pressure,

reducing the cushioning ability of

the tires. In addition, driving on

rough roads may cause damage

to the tires themselves, as well as

the vehicle’s wheels and body.

Tire rotation

Tire pressure warning
system

480

6-3. Do-it-yourself maintenance

low tire inflation pressure before
serious problems arise.
The tire pressure warning sys-
tem of this vehicle adopts a 2-
type warning system



When “Adjust Pressure” is
displayed (Normal Warning)

The tire pressure warning light
comes on and a buzzer sounds
when the tire inflation pressure
becomes low due to natural air
leakage or outside temperature.
(Ways of coping:



P.518, 553)



When “Immediately Check
tire when Safe” is displayed
(Emergency Warning)

The tire pressure warning light
comes on and a buzzer sounds
when the tire inflation pressure
becomes low suddenly due to a
blowout. (Ways of coping: