Toyota Prius (2022 year). Manual in english - page 32

Check the radiator and condenser 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.

Check the 12-volt battery as follows:

■

12-volt battery exterior

Make sure that the 12-volt battery terminals are not corroded and
that there are no loose connections, cracks, or loose clamps.
Terminals

Radiator and condenser

WARNING

■

When the hybrid system is hot

Do not touch the radiator or condenser as they may be hot and cause seri-
ous injuries, such as burns.

■

When the electric cooling fans are operating

Do not touch the engine compartment.
With the power switch in ON mode, the electric cooling fans may automati-
cally start to run if the air conditioning is on and/or the coolant temperature
is high. Be sure the power switch is off when working near the electric cool-
ing fans or radiator grille.

12-volt battery

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■

When opening the cover of the positive (+) battery terminal

■

Before recharging

When recharging, the 12-volt battery produces hydrogen gas which is flam-
mable and explosive. Therefore, observe the following precautions before
recharging:

●

If recharging with the 12-volt battery installed on the vehicle, be sure to dis-
connect the ground cable.

●

Make sure the power switch on the charger is off when connecting and dis-
connecting 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 possible imme-
diately after reconnecting the 12-volt battery. If this happens, use the wire-
less remote control or the mechanical key to lock/unlock the doors.

●

Start the hybrid system with the power switch in ACCESSORY mode. The
hybrid system may not start with the power switch turned off. However, the
hybrid system will operate normally 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 disconnected. Make sure to turn off
the power switch before disconnect the 12-volt battery. Take extra care
when connecting the 12-volt battery if the power switch mode prior to dis-
charge is unknown.

If the system will not start even after multiple attempts at all methods above,
contact your Toyota dealer.

While pushing the portion shown in the
illustration from both sides, lift the end of
the cover up.

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WARNING

■

Chemicals in the 12-volt battery

The 12-volt 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 precautions while working on or
near the 12-volt battery:

●

Do not cause sparks by touching 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 electrolyte.

●

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 insufficient ventila-
tion.

■

How to recharge the 12-volt battery

Only perform a slow charge (5 A or less). The 12-volt battery may explode if
charged at a quicker rate.

■

Emergency measures regarding electrolyte

●

If electrolyte gets in your eyes
Flush your eyes with clean water for at least 15 minutes and get immedi-
ate medical attention. If possible, continue to apply water with a sponge or
cloth while traveling to the nearest medical facility.

●

If electrolyte gets on your skin
Wash the affected area thoroughly. If you feel pain or burning, get medical
attention immediately.

●

If electrolyte gets on your clothes
It can soak through clothing on to your skin. Immediately take off the cloth-
ing and follow the procedure above if necessary.

●

If you accidentally swallow electrolyte
Drink a large quantity of water or milk. Get emergency medical attention
immediately.

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WARNING

■

When disconnecting the 12-volt battery

Do not disconnect the negative (-) terminal on the body side. The discon-
nected negative (-) terminal may touch the positive (+) terminal, which may
cause a short and result in death or serious injury.

NOTICE

■

When recharging the 12-volt battery

Never recharge the 12-volt battery while the hybrid system is operating.
Also, be sure all accessories are turned off.

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■

Checking fluid level

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

■

Adding fluid

Slide and lift up the rubber
strip to partly remove it as
shown.

Disconnect the claws and
remove the service cover.

Brake fluid

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Remove the reservoir cap.

Add brake fluid slowly while checking the fluid level.

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

■

Brake fluid can absorb moisture from the air

Excess moisture in the brake fluid can cause a dangerous loss of braking effi-
ciency. Use only newly opened brake fluid.

Fluid type

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

Items

Clean funnel

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 brake 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.

526

Open the lid.

Vehicles with the level gauge: Check the washer fluid level on the
level gauge.

“NORMAL”
“LOW”

If the washer fluid level is at
“LOW”, add washer fluid.

Washer fluid

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■

Using the gauge (if equipped)

The washer fluid level can be checked by
observing the position of the level on the
liquid-covered holes in the gauge.
If the level falls below the second hole
from the bottom (the “LOW” position), refill
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 engine etc.

NOTICE

■

Do not use any fluid other than washer fluid

Do not use soapy water or engine antifreeze instead of washer fluid.
Doing so may cause streaking on the vehicle’s painted surfaces, as well as
damaging the pump leading to problems of the washer fluid not spraying.

■

Diluting washer fluid

Dilute washer fluid with water as necessary.
Refer to the freezing temperatures listed on the label of the washer fluid bot-
tle.

Current
fluid level

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Tires

Check if the treadwear indicators 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 (if equipped) 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.

Replace or rotate tires in accordance with maintenance sched-
ules and treadwear.

Checking tires

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Rotate the tires in the order shown.

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 pressure warning system after tire rota-

tion.

Tire rotation



Vehicles without full-size spare
tire



Vehicles with full-size spare
tire

Front

530

Your vehicle is equipped with a tire pressure warning system that uses
tire pressure warning valves and transmitters to detect low tire infla-
tion pressure before serious problems arise.
If the tire pressure drops below a predetermined level, the driver is
warned by a warning light. (

P. 591)

The compact spare tire is not equipped with a tire pressure warning
valve and transmitter.

◆

Installing tire pressure warning valves and transmitters

When  replacing  tires  or  wheels,  tire  pressure  warning  valves  and
transmitters must also be installed.
When  new  tire  pressure  warning  valves  and  transmitters  are
installed,  new  ID  codes  must  be  registered  in  the  tire  pressure
warning  computer  and  the  tire  pressure  warning  system  must  be
initialized.  Have  tire  pressure  warning  valve  and  transmitter  ID
codes registered by your Toyota dealer. (

P. 531)

◆

Initializing the tire pressure warning system

■

The tire pressure warning system must be initialized when the
tire inflation pressure is changed such as when changing trav-
elling speed or load weight.

When the tire pressure warning system is initialized, the current tire
inflation pressure is set as the benchmark pressure.

Tire pressure warning system

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■

How to initialize the tire pressure warning system

Park the vehicle in a safe place and turn the power switch off.

Initialization cannot be performed while the vehicle is moving.

Adjust the tire inflation pressure to the specified cold tire inflation
pressure level. (



P. 668)

Make sure to adjust the tire pressure to the specified cold tire infla-

tion pressure level. The tire pressure warning system will operate

based on this pressure level.

Turn the power switch to ON mode.

Switch the multi-information display to the

screen.

(

P. 151)

Press

of the meter control switches, select

(“Vehicle Settings”), and then press

Press

of the meter control switches, select “Mainte-

nance System”, and then press

Press

of the meter control switches, select “TPMS”,

and then press

Press and hold

When

initialization

com-

pletes, a message is dis-
played

the

multi-

information display and the
tire pressure warning light
illuminates.

◆

Registering ID codes

The tire pressure warning valve and transmitter is equipped with a
unique ID code. When replacing a tire pressure warning valve and
transmitter, it is necessary to register the ID code. Have the ID code
registered by your Toyota dealer.

Until Complete

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■

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 cannot 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.

■

Replacing tires and wheels

If the ID code of the tire pressure warning valve and transmitter is not reg-

istered, the tire pressure warning system will not work properly. After driv-

ing for about 20 minutes, the tire pressure warning light blinks for 1

minute and stays on to indicate a system malfunction.

■

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.

■

Routine tire inflation pressure checks

The tire pressure warning system does not replace routine tire inflation

pressure checks. Make sure to check tire inflation pressure as part of

your routine of daily vehicle checks.

■

Maximum load of tire

Check that the maximum load 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. 674)

BTO62EP049

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■

Tire types

●

Summer tires
Summer tires are high-speed performance 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 provide better traction in snow and to

be adequate for driving in most winter conditions as well as for use

year-round. All season tires, however, do not have adequate traction

performance compared with snow tires in heavy or loose snow. Also, all

season tires fall short in acceleration 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

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. (