2020 TOYOTA 4RUNNER air filter

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4RUNNER (U)6-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 390
Cleaning and protecting the vehicle interior ........... 393
6-2. Maintenance Maintenance requirements ................... 396
General maintenance ........ 398
Emission inspection and maintenance (I/M)
programs ......................... 401
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 402
Hood.................................. 405
Engine compartment ......... 406
Tires .................................. 420
Tire inflation pressure........ 434
Wheels .............................. 437
Air conditioning filter .......... 440
Wireless remote control/ electronic key battery ...... 442
Checking and replacing fuses ............................... 445
Light bulbs ......................... 448 7-1. Essential information
Emergency flashers ........... 464
If your vehicle has to be stopped in
an emergency.................. 465
If the vehicle is trapped in rising water .................. 467
7-2. Steps to take in an emergency
If your vehicle needs to be towed ...................... 468
If you think something is wrong ........................... 475
Fuel pump shut off system ............................. 476
If a warning light turns on or a warning buzzer
sounds ............................. 477
If a warning message is displayed...................... 487
If you have a flat tire .......... 492
If the engine will not start ................................. 507
If you cannot operate back door opener ............ 509
If the electronic key does not operate
properly ........................... 510
If the vehicle battery is discharged ................... 513
If your vehicle overheats......................... 517
If the vehicle becomes stuck ................................ 520
6Maintenance and care7When trouble arises

3525-1. Using the air conditioning system and defogger
4RUNNER (U)■
Ventilation and air conditioning odors
●To let fresh air in, set the air conditioning system to the out side air mode.
● During use, various odors from inside and outside the vehicle m ay enter into
and accumulate in the air conditioning system. This may then ca use odor to
be emitted from the vents.
● To reduce potential odors from occurring:
• It is recommended that the air conditioning system be set to o utside air
mode prior to turning the vehicle off.
• The start timing of the blower may be delayed for a short peri od of time
immediately after the air conditioning system is started in aut omatic
mode.
■ Air conditioning filter
P. 440
WARNING
■To prevent the windshield from fogging up
● Do not use during cool air operation in extremely humid weathe r.
The difference between the temperature of the outside air and t hat of the
windshield can cause the outer surface of the windshield to fog up, block-
ing your vision.
■ To prevent burns
● Do not touch the rear view mirror surfaces when the outside rear view mir-
ror defoggers are on.
● Do not touch the glass at lower part of the windshield or to the side of the
front pillars when the windshield wiper de-icer is on.
NOTICE
■To prevent battery discharge
Do not leave the air conditioning system on longer than necessa ry when the
engine is stopped.
● Do not place anything on the instrument
panel which may cover the air outlets.
Otherwise, air flow may be obstructed,
preventing the windshield defoggers
from defogging.

389
Maintenance and care6
4RUNNER (U)6-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 390
Cleaning and protecting the vehicle interior ........... 393
6-2. Maintenance Maintenance requirements ................... 396
General maintenance........ 398
Emission inspection and maintenance (I/M)
programs......................... 401
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 402
Hood ................................. 405
Engine compartment ......... 406
Tires .................................. 420
Tire inflation pressure ....... 434
Wheels .............................. 437
Air conditioning filter.......... 440
Wireless remote control/ electronic key battery ...... 442
Checking and replacing fuses ............................... 445
Light bulbs......................... 448

4046-3. Do-it-yourself maintenance
4RUNNER (U)
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
● Keep hands, clothing and tools away from the moving fan and eng ine
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 r ags, in the
engine compartment.
● Do not smoke, cause sparks or expose an open flame to fuel or t he bat-
tery. Fuel and battery fumes are flammable.
● Be extremely cautious when working on the battery. It contains poisonous
and corrosive sulfuric acid.
■ 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.

4406-3. Do-it-yourself maintenance
4RUNNER (U)
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 b e changed regularly to maintain
air conditioning efficiency.
Removal method
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4416-3. Do-it-yourself maintenance
6
Maintenance and care
4RUNNER (U)
■Checking interval
Inspect and replace the air conditioning filter according to th e maintenance
schedule. In dusty areas or areas with heavy traffic flow, earl y 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 ven ts decreases dramatically
The filter may be clogged. Check the filter and replace if nece ssary.
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 da mage to the
system.

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4RUNNER (U)
Alphabetical index
Alphabetical index
A/C .................................... 340, 346Air conditioning filter ............. 440
ABS (Anti-lock Brake System)...... 321
Function ................................ 321
Warning light ......................... 478
Active head restraints ............. 137
Active traction control ............ 301
Air conditioning filter .............. 440
Air conditioning
system ............................ 340, 346 Air conditioning filter ............. 440
Airbags ....................................... 35
Airbag operating conditions .... 42
Airbag precautions for your child ......................... 37
Airbag warning light .............. 478
Correct driving posture ........... 28
Curtain shield airbag operating conditions ............. 42
Curtain shield airbag precautions ........................... 39
Front passenger occupant classification syst em............. 46
General airbag precautions .... 37
Locations of airbags................ 35
Modification and disposal of airbags.............................. 41
Side airbag operating
conditions ............................. 42
Side airbag precautions .......... 37
Side and curtain shield airbags operating conditions ............. 42
Side and curtain shield airbags precautions .............. 37
SRS airbags............................ 35 Alarm .......................................... 79
Alarm ...................................... 79
Warning buzzer .................... 477
Anchor brackets ........................ 57
Antennas (smart key system) ............... 118
Anti-lock Brake System (ABS) ...................................... 321
Function ................................ 321
Warning light......................... 478
Armrest..................................... 381
Assist grip ................................ 381
Audio system
*
AUTO LSD system................... 303
Automatic air conditioning
system.................................... 346
Automatic High Beam ............. 231
Automatic light control
system.................................... 225
Automatic running boards ..... 128
Automatic transmission ......... 218
If the shift lever cannot be shifted from P .... 221
S mode ................................. 219
AUX port
*
Auxiliary boxes ........................ 362
A
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.