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Toyota 4Runner (2023 year). Manual in english - page 27

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

ate properly

●

In the following cases, the tire pressure warning system may not operate

properly.
• If non-genuine Toyota wheels are used.

• A tire has been replaced with a tire that is not an OE (Original Equip-

ment) tire.

• A tire has been replaced with a tire that is not of the specified size.

• Tire chains etc. are equipped.

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

• If there is a lot of snow or ice on the vehicle, particularly around the

wheels or wheel housings.

• If the tire inflation pressure is extremely higher than the specified

level.

• If the spare tire is in a location subject to poor radio wave signal

reception.

• If a large metallic object which can interfere with signal reception is

put near the spare tire.

• If tires not equipped with the tire pressure warning valves and trans-

mitters are used.

• If the ID code on the tire pressure warning valves and transmitters is

not registered in the tire pressure warning computer.

●

Performance may be affected in the following 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

●

When the vehicle is parked, the time taken for the warning to start or go

off could be extended.

●

When tire inflation pressure declines rapidly for example when a tire has

burst, the warning may not function.

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6-3. Do-it-yourself maintenance

■

The initialization operation

●

Make sure to carry out initialization after adjusting the tire inflation pres-

sure.

Also, make sure the tires are cold before carrying out initialization or tire

inflation pressure adjustment.

●

If you have accidentally turned the engine switch off during initialization,

it is not necessary to press the reset switch again as initialization will

restart automatically when the engine switch has been turned to IGNI-

TION ON mode for the next time.

●

If you accidentally press the reset switch when initialization is not neces-

sary, adjust the tire inflation pressure to the specified level when the

tires are cold, and conduct initialization again.

●

While the position of each tire is being determined and the inflation pres-

sures are not being displayed on the multi-information display, if the

inflation pressure of a tire drops, the tire pressure warning light will come

on.

■

When initialization of the tire pressure warning system has failed

●

Do not move the vehicle backward during initialization. Initialization is

started again from the beginning and it may take longer than usual.

●

Initialization may take longer to complete if the vehicle is driven on an

unpaved road.

When performing initialization, drive on a paved road if possible.

Depending on the driving environment and condition of the tires, initial-

ization will be completed in approximately 10 to 30 minutes.
• If initialization is not complete after driving approximately 30 minutes,

continue driving for a while.

• If initialization is not complete after driving approximately 1 hour, park

the vehicle in a safe place for approximately 20 minutes. Then drive

straight (with occasional left and right turns) at approximately 25 mph

(40 km/h) or more

for approximately 10 to 30 minutes.

• If initialization is still not complete, have the vehicle inspected by your

Toyota dealer.

: Except when making a left/right turn

●

In the following situations, the tire inflation pressure will not be recorded

and the system will not operate properly. Perform initialization again.
• When operating the tire pressure warning reset switch, the tire pres-

sure warning light does not blink 3 times.

• After performing initialization, the tire pressure warning light blinks for

1 minute then stays on after driving for about 20 minutes.

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When ID code registration has failed

●

Registration may take long time or the ID codes may not be registered in

the following situations.
• When the vehicle is moved backward during registration.

Registration is started again from the beginning and it may take lon-

ger than usual.

• When another vehicle is running the side of the vehicle such as in

heavy traffic.

It may take longer to detect the vehicle’ tire pressure warning valves

and transmitters.

• If tire pressure warning valves and transmitters are in the vehicle.

The ID codes may not be registered.

●

When performing registration, drive on a paved road if possible.

Depending on the driving environment and condition of the tires, regis-

tration will be completed in approximately 10 to 30 minutes.
• If registration is not complete after driving approximately 30 minutes,

continue driving for a while.

• If registration is not complete after driving approximately 1 hour, park

the vehicle in a safe place for approximately 20 minutes. Then drive

straight (with occasional left and right turns) at approximately 40 km/h

(25 mph) or more

for approximately 10 to 30 minutes.

If registration is still not complete, have the vehicle inspected by your

Toyota dealer.

: Except when making a left/right turn

●

When the tire pressure warning light does not blink slowly 3 times, the

ID code will not be registered and the system will not operate properly.

Perform registration again.

■

When registering ID codes

●

Initialize the tire pressure warning system after ID code registration. Ini-

tialization is disabled if the system was initialized before registration.

●

After ID code registration, the tires are hot by driving. Initialize the tire

pressure warning system after the tires become cold.

■

Canceling the change wheel set mode

●

If turning the engine switch off when in the change wheel set mode

before driving, the change wheel set mode is canceled.

●

After driving when in the change wheel set mode, the change wheel set

mode cannot be canceled. To cancel the mode, perform the procedure

for ID code registration again and turn the engine switch off before driv-

ing.

●

If the change wheel set mode is canceled, the ID codes that have

already been registered are communicated. When communication is fin-

ished, the tire pressure warning light will turn off.

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6-3. Do-it-yourself maintenance

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 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 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.

■

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. 430)

■

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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6-3. Do-it-yourself maintenance

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



P. 537)

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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6-3. Do-it-yourself maintenance

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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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When replacing wheels, care should be taken to ensure that they are
equivalent to those removed in load capacity, diameter, rim width and
inset

Replacement wheels are available at your Toyota dealer.

Conventionally referred to as “offset”.

Toyota does not recommend using the following:

●

Wheels of different sizes or types

●

Used wheels

●

Bent wheels that have been straightened

●

Use only Toyota wheel nuts and wrenches designed for use with
your aluminum wheels.

●

When rotating, repairing or changing your tires, check that the
wheel nuts are still tight after driving 1000 miles (1600 km).

●

Be careful not to damage the aluminum wheels when using tire
chains.

●

Use only Toyota genuine balance weights or equivalent and a plas-
tic or rubber hammer when balancing your wheels.

Wheels

If a wheel is bent, cracked or heavily corroded, it should be
replaced. Otherwise, the tire may separate from the wheel or
cause a loss of handling control.

Wheel selection

Aluminum wheel precautions

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6-3. Do-it-yourself maintenance

■

When replacing wheels

The wheels of your vehicle are equipped with tire pressure warning
valves and transmitters that allow the tire pressure warning system to
provide advance warning in the event of a loss in tire inflation pressure.
Whenever wheels are replaced, tire pressure warning valves and trans-
mitters must be installed. (



P. 430)

WARNING

■

When replacing wheels

●

Do not use wheels that are a different size from those recommended in
the Owner’s Manual, as this may result in a loss of handling control.

●

Never use an inner tube in a leaking wheel which is designed for a
tubeless tire. Doing so may result in an accident, causing death or seri-
ous injury.

■

When installing the wheel nuts

Never use oil or grease on the wheel bolts or wheel nuts.
Oil and grease may cause the wheel nuts to be excessively tightened, lead-
ing to bolt or disc wheel damage. In addition, the oil or grease can cause the
wheel nuts to loosen and the wheel may fall off, causing an accident and
resulting in death or serious injury. Remove any oil or grease from the wheel
bolts or wheel nuts.

NOTICE

■

Replacing tire pressure warning valves and transmitters

●

Because tire repair or replacement may affect the tire pressure warn-
ing valves and transmitters, make sure to have tires serviced by your
Toyota dealer or other qualified service shop. In addition, make sure to
purchase your tire pressure warning valves and transmitters at your
Toyota dealer.

●

Ensure that only genuine Toyota wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly
with non-genuine wheels.

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Turn the engine switch off.
Open the glove box and
remove the cover.

Remove the filter cover.

Remove the air conditioning fil-
ter and replace it with a new
one.

The “



UP” marks shown on the fil-

ter should be pointing up.

Air conditioning filter

The air conditioning filter must be changed regularly to maintain
air conditioning efficiency.

Removal method

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6-3. Do-it-yourself maintenance

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Checking interval

Inspect and replace the air conditioning filter according to the maintenance
schedule. In dusty areas or areas with heavy traffic flow, early replacement
may be required. (For scheduled maintenance information, please refer to the
“Schedule maintenance guide” or “Owner’s Manual Supplement”.)

■

If air flow from the vents decreases dramatically

The filter may be clogged. Check the filter and replace if necessary.

NOTICE

■

When using the air conditioning system

Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the
system.

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●

Flathead screwdriver

●

Small flathead screwdriver

●

Lithium battery CR2032

Release the lock and remove
the mechanical key.

Remove the key cover.

To prevent damage to the key,
cover the tip of the flathead screw-
driver with a rag.

Remove the depleted battery
using a small flathead screw-
driver.

When removing the cover, the
electronic key module may stick to
the cover and the battery may not
be visible. In this case, remove the
electronic key module in order to
remove the battery.
Insert a new battery with the “+” terminal facing up.

Electronic key battery

Replace the battery with a new one if it is depleted.

You will need the following items:

Replacing the battery

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6-3. Do-it-yourself maintenance

When installing the key cover and mechanical key, install by con-
ducting

and

with the directions reversed.

Operate the

switch and check that the doors can

be locked/unlocked.

■

When replacing the key battery

Be careful not to lose the battery or any other small parts.

■

Use a CR2032 lithium battery

●

Batteries can be purchased at your Toyota dealer, local electrical appliance
shops or camera stores.

●

Replace only with the same or equivalent type recommended by the manu-
facturer.

●

Dispose of used batteries according to local laws.

■

If the electronic key battery is depleted

The following symptoms may occur:

●

The smart key system and wireless remote control will not function properly.

●

The operational range will be reduced.

WARNING

■

Battery precautions

Observe the following precautions.
Failure to do so may result in death or serious injury.

●

Do not swallow the battery. Doing so may cause chemical burns.

●

A coin battery or button battery is used in the wireless remote control/elec-
tronic key. If a battery is swallowed, it may cause severe chemical burns in
as little as 2 hours and may result in death or serious injury.

●

Keep away new and removed batteries from children.

●

If the cover cannot be firmly closed, stop using the wireless remote con-
trol/electronic key and stow the key in the place where children cannot
reach, and then contact your Toyota dealer.

●

If you accidentally swallow a battery or put a battery into a part of your
body, get emergency medical attention immediately.

■

To prevent battery explosion or leakage of flammable liquid or gas

●

Replace the battery with a new battery of the same type. If a wrong type of
battery is used, it may explode.

●

Do not expose batteries to extremely low pressure due to high altitude or
extremely high temperatures.

●

Do not burn, break or cut a battery.

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NOTICE

■

For normal operation after replacing the battery

Observe the following precautions to prevent accidents:

●

Always work with dry hands.
Moisture may cause the battery to rust.

●

Do not touch or move any other component inside the remote control.

●

Do not bend either of the battery terminals.

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6-3. Do-it-yourself maintenance

Turn the engine switch off.
Open the Fuse box cover.



Engine compartment

Push the tab in and lift the lid off.



Driver’s side instrument panel

Remove the lid.

Remove the fuse with the pull-
out tool.

Only type A fuse can be removed
using the pullout tool.

Checking and replacing fuses

If any of the electrical components do not operate, a fuse may
have blown. If this happens, check and replace the fuses as nec-
essary.

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