LEXUS UX 200 (2019 year). Instruction - part 20

316

6-2. Maintenance

The OBD system determines that a 
problem exists somewhere in the emis-
sion control system. Your vehicle may 
not pass the I/M test and may need to 
be repaired. Contact your Lexus 
dealer to service the vehicle.

 When the battery is disconnected 

or discharged
Readiness codes that are set during 
ordinary driving are erased.
Also, depending on your driving 
habits, the readiness codes may not 
be completely set.

 When the fuel tank cap is loose

The malfunction indicator lamp 
comes on indicating a temporary 
malfunction and your vehicle may 
not pass the I/M test.

The error code in the OBD system will 
not be cleared unless the vehicle is 
driven 40 or more times.

Contact your Lexus dealer to prepare 
the vehicle for re-testing.

Emission inspection and 
maintenance (I/M) pro-
grams

Some states have vehicle emission 
inspection programs which include 
OBD (On Board Diagnostics) 
checks. The OBD system monitors 
the operation of the emission con-
trol system.

If the malfunction indicator lamp 
comes on

Your vehicle may not pass the 
I/M test in the following situa-
tions:

When the malfunction indicator 
lamp still remains on after sev-
eral driving trips

If your vehicle does not pass the 
I/M test

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6-3. Do-it-yourself maintenance

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6-3.Do-it-yourself maintenance

Do-it-yourself service pre-
cautions

If you perform maintenance by 
yourself, be sure to follow the cor-
rect procedure as given in these 
sections.

Maintenance

Items

Parts and tools

Battery condi-
tion
(

P.325)

• Warm  water
• Baking soda
• Grease
• Conventional wrench 

(for terminal clamp 
bolts)

Brake fluid level
(

P.324)

• 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
coolant level
(

P.323)

• “Toyota  Super  Long 

Life Coolant” or a sim-
ilar high quality eth-
ylene glycol-based 
non-silicate, non-
amine, non-nitrite and 
non-borate coolant 
with long-life hybrid 
organic acid technol-
ogy
For the U.S.A.:
“Toyota Super Long 
Life Coolant” is pre-
mixed with 50% cool-
ant and 50% deion-
ized water.
For Canada:
“Toyota Super Long 
Life Coolant” is pre-
mixed with 55% cool-
ant and 45% deion-
ized water.

• Funnel (used only for 

adding coolant)

Engine oil level
(

P.321)

• “Toyota  Genuine 

Motor Oil” or equiva-
lent

• Rag or paper towel
• Funnel (used only for 

adding engine oil)

Fuses 
(

P.343)

• Fuse  with  same 

amperage rating as 
original

Light bulbs
(

P.346)

• Bulb with same num-

ber and wattage rat-
ing as original

Headlight aim

• Phillips-head screw-

driver

Items

Parts and tools

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6-3. Do-it-yourself maintenance

Radiator and 
condenser
(

P.324)



Tire inflation 
pressure 
(

P.337)

• Tire pressure gauge
• Compressed air 

source

Washer fluid 
(

P.327)

• 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 elec-

trically energized. To avoid death or seri-

ous injury, observe the following 

precautions.

■

When working on the engine com-

partment

●

Keep hands, clothing and tools away 

from the moving fan and engine drive 

belt.

●

Be careful not to touch the engine, 

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 compartment.

●

Do not smoke, cause sparks or expose 

an open flame to fuel or the battery. 

Fuel and battery fumes are flammable.

●

Be extremely cautions when working 

on the battery. It contains poisonous 

and corrosive sulfuric acid.

Items

Parts and tools

■

When working near the electric cool-

ing fan or radiator grille

Be sure the engine switch is OFF.

With the engine switch in ON, the elec-

tric cooling fan may automatically start to 

run if the air conditioning is on and/or the 

coolant temperature is high. (

P.324)

■

Safety glasses

Wear safety glasses to prevent flying or 

falling material, fluid spray, etc. from get-

ting 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.

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6-3. Do-it-yourself maintenance

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1

Pull the hood lock release lever.

The hood will pop up slightly.

2

Pull up the auxiliary catch lever and 
lift the hood.

3

Hold the hood open by inserting 
the supporting rod into the slot.

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 serious injury.

■

After installing the support rod into 

the slot

Make sure the rod is properly inserted 

into the slot to prevent the hood from 

shutting on your head or body.

NOTICE

■

When closing the hood

Be sure to return the support rod to its 

clip before closing the hood.
Closing the hood without returning the 

support rod properly may cause the 

hood to be damaged.

320

6-3. Do-it-yourself maintenance

■

Front

■

Rear

Positioning a floor jack

When using a floor jack, follow the 
instructions in the manual provided 
with the jack and perform the oper-
ation safely.
When raising your vehicle with a 
floor jack, position the jack cor-
rectly.
Improper placement may damage 
your vehicle or cause injury.

Location of the jack point

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Fuse boxes (

P.343)

Engine coolant reservoir (

P.323)

Engine oil filler cap (

P.322)

Battery (

P.325)

Brake fluid reservoir (

P.324)

Radiator (

P.324)

Condenser (

P.324)

Electric cooling fan

Engine oil level dipstick (

P.321)

Washer fluid tank (

P.327)

With the engine at operating tempera-
ture and turned off, check the oil level 

on the dipstick.

■

Checking the engine oil

1

Park the vehicle on level ground. 
After warming up the engine and 

Engine compartment

Components

A
B
C
D

E
F

G

H

I

J

Checking and adding the engine 
oil

322

6-3. Do-it-yourself maintenance

turning off the engine, wait more 
than 5 minutes for the oil to drain 
back into the bottom of the engine.

2

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

3

Wipe the dipstick clean.

4

Reinsert the dipstick fully.

5

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

Low

Normal

Excessive

6

Wipe the dipstick and reinsert it 
fully.

■

Checking the oil type and prepar-
ing the items needed

Make sure to check the oil type and 
prepare the items needed before add-
ing oil.

 Engine oil selection

P.392

 Oil quantity (Low 

 Full)

1.6 qt. (1.5 L, 1.3 Imp.qt.)

 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.

1

Remove the oil filler cap by turning 
it counterclockwise.

2

Add engine oil slowly, checking the 
dipstick.

3

Install the oil filler cap by turning it 
clockwise.

■

Engine oil consumption

A certain amount of engine oil will be con-

sumed while driving. In the following situa-

tions, oil consumption 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 inappropriate 

viscosity is used

●

When driving at high engine speeds or 

with a heavy load, when towing, or when 

driving while accelerating or decelerat-

A
B
C

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ing frequently

●

When leaving the engine idling for a long 

time, or when driving frequently through 

heavy traffic

■

After changing the engine oil

The engine oil maintenance data should be 

reset. Perform the following procedures:

1

Press 

 or 

 of the meter control 

switches and select 

.

2

Press 

 or 

 of the meter control 

switches, select “Vehicle Settings” and 

then press “OK”.

3

Press 

 or 

 of the meter control 

switches, select “Oil Maintenance” and 

then press and hold the “OK”.

4

Select “Yes” and press “OK”.

“Reset Complete” will be displayed when 

the reset procedure has been completed.

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

Reservoir cap

“FULL” line

“LOW” line

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

P.386)

■

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 mix-

ture of 50% coolant and 50% deionized 

WARNING

■

Used engine oil

●

Used engine oil contains potentially 

harmful contaminants which may 

cause skin disorders such as inflamma-

tion and skin cancer, so care should be 

taken to avoid prolonged and 

repeated contact. To remove used 

engine oil from your skin, wash thor-

oughly 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 house-

hold trash, in sewers or onto the 

ground. Call your Lexus dealer, ser-

vice station or auto parts store for 

information concerning recycling or 

disposal.

●

Do not leave used engine oil within the 

reach of children.

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 dipstick 

every time you refill the vehicle.

●

Be sure the engine oil filler cap is prop-

erly tightened.

Checking the engine coolant

A

B

C

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6-3. Do-it-yourself maintenance

water.

(Minimum temperature: -31°F [-35°C])

Canada:

“Toyota Super Long Life Coolant” is a mix-

ture of 55% coolant and 45% deionized 

water.

(Minimum temperature: -44°F [-42°C])

For more details about coolant, contact 

your Lexus dealer.

■

If the coolant level drops within a short 

time of replenishing

Visually check the radiator, hoses, engine 

coolant reservoir cap, drain cock and water 

pump.

If you cannot find a leak, have your Lexus 

dealer test the cap and check for leaks in 

the cooling system.

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 condi-

tion, have your vehicle inspected by 
your Lexus dealer.

■

Checking fluid level

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

■

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 

WARNING

■

When the engine is hot

Do not remove the engine coolant reser-

voir cap.

The cooling system may be under pres-

sure and may spray hot coolant 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 pre-

vent it from damaging parts or paint.

Checking the radiator and con-
denser

WARNING

■

When the engine is hot

Do not touch the radiator or condenser 

as they may be hot and cause serious 

injuries, such as burns.

■

When the electric cooling fan is oper-

ating

Do not touch the engine compartment.

With the engine switch in ON, the elec-

tric cooling fan may automatically start to 

run if the air conditioning is on and/or the 

coolant temperature is high. Be sure the 

engine switch is OFF when working near 

the electric cooling fan or radiator grille.

Checking and adding the brake 
fluid

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6-3. Do-it-yourself maintenance

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brake fluid

 Items

Clean funnel

■

Brake fluid can absorb moisture from 

the air

Excess moisture in the brake fluid can cause 

a dangerous loss of braking efficiency. Use 

only newly opened brake fluid.

Check the battery as follows.

■

Battery exterior

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

Terminals

Hold-down clamp

■

Checking battery fluid

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

“UPPER LEVEL” line

“LOWER LEVEL” line

If the fluid level is at or below the “LOWER 
LEVEL” line, add distilled water.

■

Adding distilled water

1

Remove the vent plug.

2

Add distilled water.

If the “UPPER LEVEL” line cannot be seen, 

check the fluid level by looking directly at 

WARNING

■

When filling the reservoir

Take care as brake fluid can harm your 

hands and eyes and damage painted sur-

faces.

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

A

B

A

B

326

6-3. Do-it-yourself maintenance

the cell.

3

Put the vent plug back on and close 
it securely.

■

Before recharging

When recharging, the battery produces 

hydrogen gas which is flammable 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 char-

ger is off when connecting and discon-

necting the charger cables to the battery.

■

After recharging/reconnecting the bat-

tery

●

The engine may not start. Follow the pro-

cedure below to initialize the system.

1

Shift the shift lever to P.

2

Open and close any of the doors.

3

Restart the engine.

●

Unlocking the doors using the smart 

access system with push-button start may 

not be possible immediately after recon-

necting 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 

second attempt.

●

The engine switch mode is recorded by 

the vehicle. If the battery is reconnected, 

the vehicle will return the engine switch 

mode to the status it was in before the 

battery was disconnected. Make sure to 

turn off the power before disconnect the 

battery. Take extra care when connecting 

the battery if the engine switch mode 

prior to discharge is unknown.

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

WARNING

■

Chemicals in the battery

Battery contains poisonous and corro-

sive 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 bat-

tery:

●

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.

■

Emergency measures regarding 

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 nearest medical 

facility.

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6-3. Do-it-yourself maintenance

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If none of the washer does not work or 
the “Windshield Washer Fluid Low” 
appears on the multi-information dis-
play, the washer tank may be empty. 
Add washer fluid.

WARNING

●

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 clothing 

and follow the procedure above if nec-

essary.

●

If you accidentally swallow electrolyte

Drink a large quantity of water or milk. 

Get emergency medical attention 

immediately.

■

When there is insufficient battery 

fluid

Do not use if there is insufficient fluid in 

the battery. There is a possible danger 

that the battery may explode.

NOTICE

■

When recharging the battery

Never recharge the battery while the 

engine is running. Also, be sure all acces-

sories 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 con-

tains 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 anti-

freeze 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 neces-

sary.

Refer to the freezing temperatures listed 

on the label of the washer fluid bottle.

328

6-3. Do-it-yourself maintenance

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 indica-

tors 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 cannot be 

properly repaired due to the size or loca-

tion of a cut or other damage.

If you are not sure, consult with your Lexus 

dealer.

■

Tire life

Any tire over 6 years old must be checked 

by a qualified technician even if it has sel-

dom or never been used or damage is not 

obvious.

■

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, which-

ever 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.399)

■

Tire types

●

Summer tires

Summer tires are high-speed perfor-

mance tires best suited to highway driv-

ing under dry conditions. Since summer 

tires do not have the same traction per-

formance as snow tires, summer tires are 

inadequate for driving on snow-covered 

or icy roads. For driving on snow-covered 

Tires

Replace or rotate tires in accor-
dance with maintenance schedules 
and treadwear.

Checking tires

A
B
C

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roads or icy roads, the use of snow tires is 

recommended. When installing 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 ade-

quate for driving in most winter condi-

tions as well as for use year-round. All 

season tires, however, do not have ade-

quate 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, construction and load capacity 

as the originally installed tires. Since your 

vehicle has radial tires as original equip-

ment, 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. (

P.249)

■

If the tread on snow tires wears down 

below 0.16 in. (4 mm)

The effectiveness of the tires as snow tires is 

lost.

■

Replacing tires (vehicles with run-flat 

tires)

Your vehicle may not be equipped with the 

following tools and jack for replacing a tire. 

In this case, when replacing tires with tires 

that are not run-flat tires, purchase tools 

and jack. Tools and jack can be purchased 

at your Lexus dealer.

●

Wheel nut wrench

●

Jack

●

Jack handle

WARNING

■

When inspecting or replacing tires

Observe the following precautions to 

prevent accidents.

Failure to do so may cause damage to 

parts of the drivetrain as well as danger-

ous handling 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 Lexus.

●

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 compact spare tire: Do 

not tow if your vehicle has a compact 

spare tire installed.

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 cushion-

ing ability of the tires. In addition, driving 

on rough roads may cause damage to 

the tires themselves, as well as the vehi-

cle’s wheels and body.

■

If tire inflation pressure of each tire 

becomes low while driving (vehicles 

without run-flat tires)

Do not continue driving, or your tires 

and/or wheels may be ruined.

330

6-3. Do-it-yourself maintenance

Rotate the tires in the order shown.

To equalize tire wear and extend tire life, 
Lexus recommends that tire rotation is car-
ried out at the same interval as tire inspec-
tion.
Do not fail to initialize the tire pressure 
warning system after tire rotation.

■

When rotating the tires

Make sure that the engine switch is OFF. If 

the tires are rotated while the engine switch 

is in ON, the tire position information will 

not be updated.
If this accidentally occurs, either turn the 

engine switch to OFF and then to ON, or 

initialize the tire pressure warning system 

after checking that the tire pressure is prop-

erly adjusted.

When run-flat tires are installed, the 
vehicle can be driven for a maximum of 
100 miles (160 km) at a speed below 
50 mph (80 km/h) after any tire goes 
flat. (However, the vehicle speed may 
not increase to near 50 mph [80 
km/h] depending on weather or driv-
ing conditions.)

A run-flat tire has a 

 mark on 

the sidewall.

Make sure to replace the flat tire before the 
vehicle has been driven for near 100 miles 
(160 km). Also, do not use a repaired tire.

■

Run-flat tires

●

The run-flat tires are for only this vehicle. 

Do not use the tires on other vehicles.

●

Do not mix run-flat tires and normal tires.

●

If non-genuine Lexus wheels are used, it 

may be impossible to sufficiently demon-

strate the performance of run-flat tires.

Your vehicle is equipped with a tire 
pressure warning system that uses tire 
pressure warning valves and transmit-
ters to detect low tire inflation pressure 
before serious problems arise.
 If the tire pressure drops below a 

predetermined level, the driver is 
warned by a screen display and a 
warning light. (

P.359, 367)

 The tire pressure detected by the 

tire pressure warning system can be 
displayed on the multi-information 
display. (

P.79)

The illustration used is intended as an 
example, and may differ from the image 
that is actually displayed on the multi-infor-
mation display.

Tire rotation

Run-flat tires (if equipped)

Tire pressure warning system

331

6-3. Do-it-yourself maintenance

6

Mai
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nc

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 c

are

■

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.

■

Tire inflation pressure

●

It may take a few minutes to display the 

tire inflation pressure after the engine 

switch is turned to ON. It may also take a 

few minutes to display the tire inflation 

pressure after inflation pressure has been 

adjusted.

●

Tire inflation pressure changes with tem-

perature. The displayed values may also 

be different from the values measured 

using a tire pressure gauge.

■

Situations in which the tire pressure 

warning system may not operate prop-

erly

●

In the following cases, the tire pressure 

warning system may not operate prop-

erly.

• If non-genuine Lexus wheels are used.

• A tire has been replaced with a tire that is 

not an OE (Original Equipment) tire.

• A tire has been replaced with a tire that is 

not of the specified size.

• Tire chains etc. are equipped.

• An auxiliary-supported run-flat tire is 

equipped.

• If a window tint that affects the radio wave 

signals is installed.

• If there is a lot of snow or ice on the vehi-

cle, particularly around the wheels or 

wheel housings.

• If the tire inflation pressure is extremely 

higher than the specified level.

• If wheels without tire pressure warning 

valves and transmitters are used.

• If the ID code on the tire pressure warn-

ing valves and transmitters is not regis-

tered in the tire pressure warning 

computer.

●

Performance may be affected in the fol-

lowing situations.

• Near a TV tower, electric power plant, 

gas station, radio station, large display, 

airport or other facility that generates 

strong radio waves or electrical noise

• When carrying a portable radio, cellular 

phone, cordless phone or other wireless 

communication device

If tire position information is not correctly 
displayed due to the radio wave conditions, 
the display may be corrected by driving and 
changing the radio wave conditions.

●

When the vehicle is parked, the time 

taken for the warning to start or go off 

could be extended.

●

When tire inflation pressure declines rap-

idly for example when a tire has burst, the 

warning may not function.

■

Warning performance of the tire pres-

sure warning system

The warning of the tire pressure warning 

system will change in accordance with the 

conditions under which it was initialized. For 

this reason, the system may give a warning 

even if the tire pressure does not reach a 

low enough level, or if the pressure is higher 

than the pressure that was adjusted to when 

the system was initialized.