Toyota Sienna (2019 year). Instruction — part 27

WARNING

Chemicals in the battery
Batteries contain 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
battery:

Do not cause sparks by touching 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 electrolyte.

Wear protective safety glasses when working near the battery.

Keep children away from the battery.

Where to safely charge the battery
Always charge the battery in an open area. Do not charge the battery in a
garage or closed room where there is insufficient ventilation.

How to recharge the battery
Only perform a slow charge (5 A or less). The 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.

NOTICE

When recharging the battery
Never recharge the battery while the engine is running. Also, be sure all
accessories are turned off.

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If any washer does not work or
“Low Windshield Washer Fluid”
appears on the multi-information
display, the washer tank may be
empty. Add washer fluid.

Washer fluid

WARNING

When refilling washer fluid
Do not refill washer fluid when the engine is hot or running, 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 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.

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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 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.

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.

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

Checking tires

Tire rotation

1
2
3

Front

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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. (

P. 474)

Vehicles with compact spare tire: The compact spare tire is not
equipped with the tire pressure warning valve and transmitters.

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. 422)

Initializing the tire pressure warning system

When the tire size is changed, the tire pressure warning system
must be initialized.
When the tire pressure warning system is initialized, the current tire
inflation pressure is set as the benchmark pressure.

How to initialize the tire pressure warning system

Park the vehicle in a safe place and turn the engine 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. 522)

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 engine switch to the “ON” position (vehicles without a
smart key system) or IGNITION ON mode (vehicles with a smart
key system).

Tire pressure warning system

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Press and hold the tire pres-
sure warning reset switch
until the tire pressure warn-
ing light blinks slowly 3 times.

Vehicles without a smart key system: Wait for a few minutes with
the engine switch in the “ON” position and then turn the engine
switch to the “ACC” or “LOCK” position.
Vehicles with a smart key system: Wait for a few minutes with the
engine switch in IGNITION ON mode and then turn the engine
switch off.

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.

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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 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. 529)

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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 restriction. Snow tires

should be installed on all wheels. (

P. 328)

If the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is lost.

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Situations in which the tire pressure warning system may not oper-

ate properly
The tire pressure warning system will be disabled in the following condi-

tions:

(When the condition becomes normal, the system will work properly.)

If tires not equipped with tire pressure warning valves and transmitters

are used.

If the ID code on the tire pressure warning valves and transmitters is not

registered in the tire pressure warning computer.

If the tire inflation pressure is 73 psi (500 kPa, 5.1 kgf/cm

or bar) or

higher.

The tire pressure warning system may be disabled in the following condi-

tions:

(When the condition becomes normal, the system will work properly.)

If electronic devices or facilities using similar radio wave frequencies are

nearby.

If a radio set at similar frequencies is in use in the vehicle.

If a window tint that affects the radio wave signals is installed.

If there is a lot of snow or ice on the vehicle, in particular around the

wheels or wheel housings.

If non-genuine Toyota wheels are used. (Even if you use Toyota wheels,

the tire pressure warning system may not work properly with some types

of tires.)

If tire chains are used.

Initializing the tire pressure warning system
Initialize the system with the tire inflation pressure adjusted to the speci-

fied level.

If you press the tire pressure warning reset switch accidentally
If initialization is performed, adjust the tire inflation pressure to the speci-

fied level and initialize the tire pressure warning system again.

When the initialization of the tire pressure warning system has failed
Initialization can be completed in a few minutes. However, in the following

cases, the settings have not been recorded and the system will not oper-

ate properly. If repeated attempts to record tire inflation pressure settings

are unsuccessful, have the vehicle inspected by your Toyota dealer.

When operating the tire pressure warning reset switch, the tire pressure

warning light does not blink 3 times.

After driving for a certain period of time since the initialization has been

completed, the warning light comes on after blinking for 1 minute.

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If “Check Tire Pressure Monitoring System” is shown on multi-infor-

mation display
Stop the vehicle in a safe place and turn the engine switch off then “ON”

position (vehicles without a smart key system) or IGNITION ON mode

(vehicles with a smart key system) again.
If the tire pressure warning indicator flashes for 1 minute then illuminates,

have the vehicle inspected by your Toyota dealer.

Tire pressure warning system certification
FCC ID:GQ4-45T
FCC ID:GQ4-37R



For vehicles sold in the U.S.A.

NOTE:

This device complies with part 15 of the FCC Rules. Operation is subject

to the following two conditions: (1) This device may not cause harmful

interference, and (2) this device must accept any interference received,

including interference that may cause undesired operation.
FCC WARNING:

Changes or modifications not expressly approved by the party

responsible for compliance could void the user’s authority to operate the

equipment.



For vehicles sold in Canada

NOTE:

Operation is subject to the following two conditions: (1) this device may

not cause interference, and (2) this device must accept any interference,

including interference that may cause undesired operation of the device.

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WARNING

When inspecting or replacing tires
Observe the following precautions to prevent accidents. Failure to do so

may cause damage to parts of the drive train, as well as dangerous han-

dling characteristics, which may lead to an accident resulting in death or

serious injury.

Do not mix tires of different makes, models or tread patterns.

Also, do not mix tires of remarkably different treadwear.

Do not use tire sizes other than those recommended by Toyota.

Do not mix differently constructed 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 previously.

Vehicles with a compact spare tire: Do not tow if your vehicle has a

compact spare tire installed.

When initializing the tire pressure warning system
Do not operate the tire pressure warning reset switch without first

adjusting the tire inflation pressure to the specified level. Otherwise, the

tire pressure warning light may not come on even if the tire inflation

pressure is low, or it may come on when the tire inflation pressure is

actually normal.

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NOTICE

Repairing or replacing tires, wheels, tire pressure warning valves,

transmitters and tire valve caps

When removing or fitting the wheels, tires or the tire pressure warning

valves and transmitters, contact your Toyota dealer as the tire pres-

sure warning valves and transmitters may be damaged if not handled

correctly.

Make sure to install the tire valve caps. If the tire valve caps are not

installed, water could enter the tire pressure warning valves and the

tire pressure warning valves could be bound.

When replacing tire valve caps, do not use tire valve caps other than

those specified. The cap may become stuck.

To avoid damage to the tire pressure warning valves and transmit-

ters
When a tire is repaired with liquid sealants, the tire pressure warning

valve and transmitter may not operate properly. If a liquid sealant is

used, contact your Toyota dealer or other qualified service shop as soon

as possible. Make sure to replace the tire pressure warning valve and

transmitter when replacing the tire. (

P. 421)

Driving on rough roads
Take particular care when driving on roads with loose surfaces or pot-

holes.

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.

If tire inflation pressure of each tire becomes low while driving
Do not continue driving, or your tires and/or wheels may be ruined.

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Tire inflation pressure

The recommended cold tire infla-
tion pressure and tire size are dis-
played on the tire and loading
information label. (

P. 522)

Tire inflation pressure

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Tire valve
Tire pressure gauge

Remove the tire valve cap.
Press the tip of the tire pressure gauge onto the tire valve.
Read the pressure using the gauge gradations.
If the tire inflation pressure is not at the recommended level, adjust
the pressure.
If you add too much air, press the center of the valve to deflate.
After completing the tire inflation pressure measurement and
adjustment, apply soapy water to the valve and check for leakage.
Put the tire valve cap back on.

Tire inflation pressure check interval
You should check tire inflation pressure every two weeks, or at least once

a month.

Do not forget to check the spare.

Effects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following:

Reduced fuel economy

Reduced driving comfort and poor handling

Reduced tire life due to wear

Reduced safety

Damage to the drive train

If a tire needs frequent inflating, have it checked by your Toyota dealer.

Inspection and adjustment procedure

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Instructions for checking tire inflation pressure
When checking tire inflation pressure, observe the following:

Check only when the tires are cold.

If your vehicle has been parked for at least 3 hours or has not been

driven for more than 1 mile or 1.5 km, you will get an accurate cold tire

inflation pressure reading.

Always use a tire pressure gauge.

It is difficult to judge if a tire is properly inflated based only on its appear-

ance.

It is normal for the tire inflation pressure to be higher after driving as

heat is generated in the tire. Do not reduce tire inflation pressure after

driving.

Never exceed the vehicle capacity weight.

Passengers and luggage weight should be placed so that the vehicle is

balanced.

WARNING

Proper inflation is critical to save tire performance
Keep your tires properly inflated.

If the tires are not properly inflated, the following conditions may occur

which could lead to an accident resulting in death or serious injury:

Excessive wear

Uneven wear

Poor handling

Possibility of blowouts resulting from overheated tires

Air leaking from between tire and wheel

Wheel deformation and/or tire damage

Greater possibility of tire damage while driving (due to road hazards,

expansion joints, sharp edges in the road, etc.)

NOTICE

When inspecting and adjusting tire inflation pressure
Be sure to put the tire valve caps back on.

If a valve cap is not installed, dirt or moisture may get into the valve and

cause an air leak, resulting in decreased tire inflation pressure.

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