Toyota Tundra Hybrid (2023 year). Manual in english - page 28

P.463)

• Grease
• Warm water
• Baking soda
• Distilled water
• Flat-head screw-

driver or
mechanical key
(

P.110)

• Conventional

wrench (for ter-
minal clamp
bolts)

Brake fluid
level (

• 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/inter-
cooler/power
control unit
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.458)

• “Toyota Genuine

Motor Oil” or
equivalent

• Rag or paper

towel

• Funnel (used

only for adding
engine oil)

Fuses
(



P.486)

• Fuse with same

amperage rating
as original

Items

Parts and tools

455

6-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca

Light bulbs
(

P.490)

• Bulb with same

number and
wattage rating as
original

• Phillips-head

screwdriver

• Wrench

Radiator and
condenser
(



Tire inflation
pressure
(

P.476)

• Tire pressure

gauge

• Compressed air

source

Washer fluid
(

P.462)

• 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

●

Make sure that the “ACCES-

SORY” or “IGNITION ON” on

the multi-information display

and the “READY” indicator are

both off.

●

Keep hands, clothing and tools

away from the moving fan and

engine.

Items

Parts and tools

●

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.

●

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 fuel.

■

When working near the elec-

tric cooling fan or radiator

grille

Be sure the power switch is off.

With the power 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.

456

6-3. Do-it-yourself maintenance

Pull the hood lock release
lever.

The hood will pop up slightly.

Pull up the auxiliary catch
lever and lift the hood.

■

12-volt battery

P.463

Hood

Opening the hood

WARNING

■

Pre-driving check

Check that the hood is fully closed

and locked.

If the hood is not locked properly,

it may open while the vehicle is in

motion and cause an accident,

which may result in death or seri-

ous injury.

457

6-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca

Fuse boxes (

P.486)

Power control unit coolant reservoir (

Intercooler coolant reservoir (

Engine coolant reservoir (



Engine oil filler cap (

P.458)

Engine oil level dipstick (

P.458)

Brake fluid reservoir (



Engine radiator (



Condenser (



Electric cooling fans

Radiator cooling fan (



Washer fluid tank (



P.462)

Intercooler radiators (



Engine compartment

Components

458

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.543



Oil quantity (Low



Full)

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

Checking and adding the
engine oil

459

6-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca



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.

460

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
hybrid system 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.535)



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.535)



Power control unit coolant

Power control unit coolant
reservoir cap

“FULL” line

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.

■

If oil is spilled on the engine

cover

To prevent the engine cover from

being damaged, remove any

engine oil from the engine cover

as soon as possible using a neu-

tral detergent. Do not use an

organic solvent such as brake

cleaner.

Checking the coolant

461

6-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca

“LOW” line

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



P.535)

■

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

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 radiator, condenser
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”

WARNING

■

When the hybrid system is

hot

Do not remove the coolant reser-

voir 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 radiator,
condenser and inter-
cooler radiators

WARNING

■

When the hybrid system is

hot

Do not touch the radiator, con-

denser or intercooler radiators or

condenser as they may be hot

and cause serious injuries, such

as burns.

Checking and adding the
brake fluid

462

6-3. Do-it-yourself maintenance

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

■

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.

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

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.

Adding the washer fluid

WARNING

■

When adding washer fluid

Do not add washer fluid when the

hybrid system is hot or operating

as washer fluid contains alcohol

and may catch fire if spilled on the

hybrid system, etc.

463

6-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca

The 12-volt battery is located in
the left-hand side of the rear
seat under.

Raising the bottom cushion.
(

P.135)

Remove the battery cover.

Use the flat-head screwdriver or

mechanical key (

P.110).

■

Before recharging

When recharging, the 12-volt bat-

tery produces hydrogen gas which

is flammable and explosive. There-

fore, observe the following precau-

tions before recharging:

●

If recharging with the 12-volt bat-

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.

12-volt battery

Location

Removing the 12-volt bat-
tery cover

464

6-3. Do-it-yourself maintenance

tery installed on the vehicle, be

sure to disconnect the ground

cable.

●

Make sure the power switch on

charger is off when connecting

and disconnecting the charger

cables to the 12-volt battery.

■

After recharging/reconnecting

the 12-volt battery

●

Unlocking the doors using the

smart key system may not be pos-

sible immediately after reconnect-

ing the 12-volt battery. If this

happens, use the wireless remote

control or the mechanical key to

lock/unlock the doors.

●

Start the hybrid system with the

power switch in ACC. The hybrid

system may not start with the

power switch turned off. However,

the hybrid system will operate nor-

mally from the second attempt.

●

The power switch mode is

recorded by the vehicle. If the 12-

volt battery is reconnected, the

vehicle will return the power

switch mode to the status it was in

before the 12-volt battery was dis-

connected. Make sure to turn off

the power switch before discon-

necting the 12-volt battery. Take

extra care when connecting the

12-volt battery if the power switch

mode prior to discharge is

unknown.

●

When the 12-volt battery is recon-

nected, start the hybrid system,

depress the brake pedal, and con-

firm that it is possible to shift into

each shift position.

If the system will not start even after

multiple attempts, contact your Toy-

ota dealer.

WARNING

■

Chemicals in the 12-volt bat-

tery

The 12-volt battery contains poi-

sonous and corrosive sulfuric acid

and may produce hydrogen gas

which is flammable and explosive.

To reduce the risk of death or seri-

ous injury, take the following pre-

cautions while working on or near

the 12-volt battery:

●

Do not cause sparks by touch-

ing the 12-volt battery terminals

with tools.

●

Do not smoke or light a match

near the 12-volt battery.

●

Avoid contact with eyes, skin

and clothes.

●

Never inhale or swallow electro-

lyte.

●

Wear protective safety glasses

when working near the 12-volt

battery.

●

Keep children away from the

12-volt battery.

■

Where to safely charge the

12-volt battery

Always charge the 12-volt battery

in an open area. Do not charge

the 12-volt battery in a garage or

closed room where there is insuf-

ficient ventilation.

■

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.

465

6-3. Do-it-yourself maintenance

Maintena

nce
a

nd ca

Make sure that the 12-volt bat-
tery terminals are not corroded
and that there are no loose con-
nections, cracks, or loose
clamps.

Terminals

Hold-down clamp

WARNING

●

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 replacing the 12-volt

battery

Use a 12-volt battery designed for

this vehicle. Failure to do so may

cause gas (hydrogen) to enter the

passenger compartment, causing

a fire or explosion.
For replacement of the 12-volt

battery, contact your Toyota

dealer.

NOTICE

■

When recharging the 12-volt

battery

Never recharge the 12-volt bat-

tery while the hybrid system is

operating. Also, be sure all acces-

sories are turned off.

Exterior

466

6-3. Do-it-yourself maintenance

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

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. (