2021 TOYOTA 4RUNNER key battery

391
Maintenance and care6
4RUNNER (U)6-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 392
Cleaning and protecting the vehicle interior ........... 395
6-2. Maintenance Maintenance requirements ................... 398
General maintenance........ 400
Emission inspection and maintenance (I/M)
programs......................... 403
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 404
Hood ................................. 407
Engine compartment ......... 408
Tires .................................. 422
Tire inflation pressure ....... 436
Wheels .............................. 439
Air conditioning filter.......... 441
Wireless remote control/ electronic key battery ...... 443
Checking and replacing fuses ............................... 446
Light bulbs......................... 449

3936-1. Maintenance and care
6
Maintenance and care
4RUNNER (U)■
Wheels and wheel ornaments
●Remove any dirt immediately by using a neutral detergent.
● Wash detergent off with water immediately after use.
● To protect the paint from damage, make sure to observe the following pre-
cautions.
• Do not use acidic, alkaline or abrasive detergent
• Do not use hard brushes
• Do not use detergent on the wheels when they are hot, such as after driv-
ing or parking in hot weather
■ Bumpers and side moldings
Do not scrub with abrasive cleaners.
■ Plated portions
If dirt cannot be remove, clean the parts as follows:
●Use a soft cloth dampened with an approximately 5% solution of neutral
detergent and water to clean the dirt off.
● Wipe the surface with a dry, soft cloth to remove any remaining moisture.
● To remove oily deposits, use alcohol wet wipes or a similar pro duct.
■ Notes for a smart key system (if equipped)
If the door handle becomes wet while the electronic key is within the effective
range, the door may lock and unlock repeatedly. In this case, f ollow the fol-
lowing correction procedures to wash the vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more awa y from the vehi-
cle. (Take care to ensure that the key is not stolen.)
• Set the electronic key to battery-saving mode to disable the s mart key sys-
tem. ( P. 121)
WARNING
■When washing the vehicle
Do not apply water to the inside of the engine compartment. Doing so may
cause the electrical components etc. to catch fire.
■ Precautions regarding the exhaust pipe
Exhaust gases cause the exhaust pipe to become quite hot.
When washing the vehicle, be careful not to touch the pipe unti l it has
cooled sufficiently, as touching hot exhaust pipe can cause bur ns.

3996-2. Maintenance
6
Maintenance and care
4RUNNER (U)■
Resetting the message indicating ma intenance is required (U.S.A. only)
After the required maintenance is performed according to the ma intenance
schedule, please reset the message.
To reset the message, follow the procedures described below:
Turn the engine switch off with the trip meter A reading shown. (P. 89)
Vehicles without a smart key system:
While pressing the display change button ( P. 89), turn the engine switch
to the “ON” position (do not start the engine because reset mod e will be
canceled).
Vehicles with a smart key system:
While pressing the display change button ( P. 89), turn the engine switch
to the IGNITION ON mode (do not start the engine because otherw ise the
reset mode will be canceled).
Continue to press and hold the button until the trip meter disp lays “000000”.
■ Allow inspection and repairs to be performed by a Toyota dealer
●Toyota technicians are well-trained specialists and are kept up to date with
the latest service information. They are well informed about th e operations
of all systems on your vehicle.
● Keep a copy of the repair order. It proves that the maintenance that has
been performed is under warranty coverage. If any problem should arise
while your vehicle is under warranty, your Toyota dealer will p romptly take
care of it.
WARNING
■ If your vehicle is no t properly maintained
Improper maintenance could result in serious damage to the vehi cle and
possible death or serious injury.
■ Handling of the battery
● Engine exhaust, some of its constituents, and a wide variety of automobile
components contain or emit chemicals known to the State of California to
cause cancer and birth defects and other reproductive harm. Wor k in a
well ventilated area.
● Oils, fuels and fluids contained in vehicles as well as waste produced by
component wear contain or emit chemicals known to the State of Califor-
nia to cause cancer and birth defects or other reproductive har m. Avoid
exposure and wash any affected area immediately.
● Battery posts, terminals and related accessories contain lead a nd lead
compounds which are known to cause brain damage. Wash your hand s
after handling. ( P. 417)
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4186-3. Do-it-yourself maintenance
4RUNNER (U)■
After recharging/reconnecting the battery (vehicles with a smar t key sys-
tem)
The engine may not start. Follow the procedure below to initial ize the system.
Shift the shift lever to P.
Open and close any of the doors.
Restart the engine.
● Unlocking the doors using the smart key system may not be possi ble imme-
diately after reconnecting 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 ACCESSORY mode. The engine
may not start when the engine switch turned from off. However, the engine
will operate normally from the second attempt.
● The engine switch mode is recorded by the vehicle. If the batte ry is recon-
nected, the vehicle will return the engine switch mode to the s tatus it was in
before the battery was disconnected. Make sure to turn off the engine
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, contact your Toyota
dealer.
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 ri sk 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 tool s.
● 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.
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4436-3. Do-it-yourself maintenance
6
Maintenance and care
4RUNNER (U)
●Flathead screwdriver
● Small flathead screwdriver
● Lithium battery CR2016 (vehicles without a smart key system), o r
CR1632 (vehicles with a smart key system)
Remove the cover.
To prevent damage to the key,
cover the tip of the screwdriver with
a rag.
Remove the module.
Open the case cover using a
coin protected with tape etc.
and remove the depleted bat-
tery.
Insert a new battery with the “+”
terminal facing up.
Wireless remote control/electronic key
batter y
Replace the battery with a n ew one if it is depleted.
You will need the following items:
Replacing the battery (vehicles without a smart key system)
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4446-3. Do-it-yourself maintenance
4RUNNER (U)
Take out the mechanical key.
Remove the cover.
To prevent damage to the key,
cover the tip of the screwdriver with
a rag.
Remove the depleted battery.
Insert a new battery with the “+”
terminal facing up.
■Use a CR2016 (vehicles without a smart key system) or CR1632 (v ehicles
with a smart key system) lithium battery
● Batteries can be purchased at your Toyota dealer, local electri cal 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 funct ion properly.
● The operational range will be reduced.
Replacing the battery (vehic les with a smart key system)
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4456-3. Do-it-yourself maintenance
6
Maintenance and care
4RUNNER (U)
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 chem ical 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 r emote con-
trol/electronic key and stow the key in the place where childre n cannot
reach, and then contact your Toyota dealer.
● If you accidentally swallow a battery or put a battery into a p art 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 w rong 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.
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 cont rol.
● Do not bend either of the battery terminals.

461
When trouble arises7
4RUNNER (U)7-1. Essential information
Emergency flashers .......... 462
If your vehicle has to be stopped in an
emergency ...................... 463
If the vehicle is trapped in rising water ..................... 465
7-2. Steps to take in an emergency
If your vehicle needs to be towed .............................. 466
If you think something is wrong .............................. 472
Fuel pump shut off system ............................ 473
If a warning light turns on or a warning buzzer
sounds ............................ 474
If a warning message is displayed......................... 484
If you have a flat tire.......... 489
If the engine will not start ................................. 504
If you cannot operate back door opener ............ 506
If the electronic key does not operate properly
(vehicles with a smart
key system)..................... 507
If the vehicle battery is discharged ...................... 510
If your vehicle overheats ........................ 514
If the vehicle becomes stuck ............................... 517