2016 TOYOTA 4RUNNER key battery

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4RUNNER (U)_(OM35B23U)6-1. Maintenance and care
Cleaning and protecting
the vehicle exterior .......... 334
Cleaning and protecting
the vehicle interior ........... 337
6-2. Maintenance
Maintenance
requirements ................... 340
General maintenance ........ 342
Emission inspection
and maintenance (I/M)
programs ......................... 345
6-3. Do-it-yourself
maintenance
Do-it-yourself service
precautions ..................... 346
Hood.................................. 349
Engine compartment ......... 350
Tires .................................. 365
Tire inflation pressure........ 371
Wheels .............................. 374
Air conditioning filter .......... 377
Wireless remote
control/electronic
key battery ...................... 379
Checking and replacing
fuses ............................... 382
Light bulbs ......................... 3857-1. Essential information
Emergency flashers ........... 402
If your vehicle has to
be stopped in an
emergency....................... 403
7-2. Steps to take in an
emergency
If your vehicle needs to
be towed .......................... 405
If you think something
is wrong ........................... 411
Fuel pump shut off
system ............................. 412
If a warning light turns
on or a warning buzzer
sounds ............................. 413
If a warning message or
indicator is displayed ....... 422
If you have a flat tire .......... 429
If the engine will not
start ................................. 442
If the shift lever cannot
be shifted from P ............. 444
If you cannot operate
back door opener ............ 445
If the electronic key does
not operate properly ........ 446
If the vehicle battery is
discharged ....................... 448
If your vehicle overheats.... 452
If the vehicle becomes
stuck ................................ 455
6Maintenance and care7When trouble arises

731-2. Theft deterrent system
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For safety and security
4RUNNER (U)_(OM35B23U)
■System maintenance
The vehicle has a maintenance-free type alarm system.
■Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of
the following:
●Nobody is in the vehicle.
●The windows and moon roof are closed before the alarm is set.
●No valuables or other personal items are left in the vehicle.
■Triggering of the alarm
The alarm may be triggered in the following situations:
(Stopping the alarm deactivates the alarm system.)
■Alarm-operated door lock
●When the alarm is operating, the doors are locked automatically to prevent
intruders.
●Do not leave the key inside the vehicle when the alarm is operating, and
make sure the key is not inside the vehicle when recharging or replacing the
battery. ●A person inside the vehicle opens a door
or the hood.
●The battery is recharged or replaced
when the vehicle is locked.
NOTICE
■To ensure the system operates correctly
Do not modify or remove the system. If modified or removed, the proper
operation of the system cannot be guaranteed.

933-1. Key information
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Operation of each component
4RUNNER (U)_(OM35B23U)■If you lose your keys
New genuine keys can be made by your Toyota dealer using the other key
(vehicles without a smart key system) or mechanical key (vehicles with a
smart key system) and the key number stamped on your key number plate.
Keep the plate in a safe place such as your wallet, not in the vehicle.
■When riding in an aircraft
When bringing a key with wireless remote control function onto an aircraft,
make sure you do not press any buttons on the key while inside the aircraft
cabin. If you are carrying the key in your bag etc., ensure that the buttons are
not likely to be pressed accidentally. Pressing a button may cause the key to
emit radio waves that could interfere with the operation of the aircraft.
■Conditions affecting operation
Vehicles without a smart key system
The wireless remote control function may not operate normally in the follow-
ing situations:
●Near a TV tower, radio station, electric power plant, airport or other facility
that generates strong radio waves
●When carrying a portable radio, cellular phone or other wireless communi-
cation devices
●When multiple wireless keys are in the vicinity
●When the wireless key is in contact with, or is covered by, a metallic object
●When a wireless key (that emits radio waves) is being used nearby
●When the wireless key has been left near an electrical appliance such as a
personal computer
Vehicles with a smart key system
P. 106
■Key battery depletion
Vehicles with a smart key system
●The standard battery life is 1 to 2 years.
●If the battery becomes low, an alarm will sound in the cabin when the engine
stops. (P. 427)
●As the electronic key always receives radio waves, the battery will become
depleted even if the electronic key is not used. The following symptoms indi-
cate that the electronic key battery may be depleted. Replace the battery
when necessary. (P. 379)
• The smart key system or the wireless remote control does not operate.
• The detection area becomes smaller.
• The LED indicator on the key surface does not turn on.

943-1. Key information
4RUNNER (U)_(OM35B23U)●To avoid serious deterioration, do not leave the electronic key within 3 ft. (1
m) of the following electrical appliances that produce a magnetic field:
•TVs
• Personal computers
• Cellular phones, cordless phones and battery chargers
• Recharging cellular phones or cordless phones
• Table lamps
• Induction cookers
Vehicles without a smart key system
If the wireless remote control function does not operate, the battery may be
depleted. Replace the battery when necessary. (P. 379)
■Precautions when disconnecting the battery (vehicles with a smart key
system)
●In some cases, it may not be possible to unlock the doors using the smart
key system immediately after the battery has been disconnected. Use the
wireless remote control or the mechanical key to lock or unlock the doors.
●The engine may not start on the first attempt after reconnecting the battery
but will start normally after the second attempt. This is not a malfunction.
●The engine switch mode is memorized by the vehicle. When the battery is
reconnected, the system will return to the mode it was in before the battery
was disconnected. Before disconnecting the battery, turn the engine switch
off.
If you are unsure what mode the engine switch was in when the battery was
disconnected, be especially careful when reconnecting the battery.
■Replacing the battery
P. 379
■Confirmation of the registered key number
The number of keys already registered to the vehicle can be confirmed. Ask
your Toyota dealer for details.
■If a wrong key is used (vehicles with a smart key system)
The key cylinder rotates freely to isolate inside mechanism.
■Certification for wireless remote control
For vehicles sold in the U.S.A.
FCC ID: HYQ12BBY
FCC ID: HYQ13BDC

983-1. Key information
4RUNNER (U)_(OM35B23U)■When the door cannot be locked by the lock sensor on the upper part of
the door handle (vehicles with a smart key system)
■Door lock buzzer
If an attempt to lock the doors is made when a door is not fully closed, a
buzzer sounds continuously. Fully close the door to stop the buzzer, and lock
the vehicle once more.
■Alarm
Locking the doors will set the alarm system. (P. 72)
■If the smart key system or the wireless remote control does not operate
properly
Use the mechanical key to lock and unlock the doors. (P. 446)
Replace the battery with a new one if it is depleted. (P. 379)
◆Door lock switches
Locks all the doors
Unlocks all the doors
◆Inside lock buttons
Locks the door
Unlocks the door
The front doors can be opened
by pulling the inside handle
even if the lock buttons are in
the lock position. If the door will not lock even when the top-
side sensor area is touched, try touching
both the topside and underside sensor
areas at the same time.
Unlocking and locking the doors from the inside
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1063-2. Opening, closing and locking the doors
4RUNNER (U)_(OM35B23U)■Battery-saving function
The battery-saving function will be activated in order to prevent the electronic
key battery and the vehicle battery from being discharged while the vehicle is
not in operation for a long time.
●In the following situations, the smart key system may take some time to
unlock the doors.
• The electronic key has been left in an area of approximately 6 ft. (2 m) of
the outside of the vehicle for 10 minutes or longer.
• The smart key system has not been used for 5 days or longer.
●If the smart key system has not been used for 14 days or longer, the doors
cannot be unlocked at any doors except the driver’s door. In this case, take
hold of the driver’s door handle, or use the wireless remote control or the
mechanical key, to unlock the doors.
The system will resume operation when
●The vehicle is locked using the door handle lock switch when carrying the
electronic key on your person.
●The vehicle is locked/unlocked using the wireless remote control.
(P. 96)
●The vehicle is locked/unlocked using the mechanical key. (P. 446)
■Conditions affecting operation
The smart key system uses weak radio waves. In the following situations, the
communication between the electronic key and the vehicle may be affected,
preventing the smart key system, wireless remote control and engine immobi-
lizer system from operating properly. (Ways of coping: P. 446)
●When the electronic key battery is depleted
●Near a TV tower, electric power plant, gas station, radio station, large dis-
play, 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
Interior alarm sounds
once.
The engine switch was
pressed after the doors
were unlocked with the
mechanical key.
Touch the electronic
key to the engine
switch while depressing
the brake pedal.
The engine switch was
pressed two consecu-
tive times without the
electronic key being
present.
AlarmSituationCorrection procedure

1964-2. Driving procedures
4RUNNER (U)_(OM35B23U)
If the engine is stopped with the shift lever in a position other than P,
the engine switch will not be turned off but instead be turned to
ACCESSORY mode. Perform the following procedure to turn the
switch off:
Check that the parking brake is set.
Shift the shift lever to P.
Check that the indicator on the engine switch is illuminated in
amber and then press the engine switch once.
Check that the indicator on the engine switch is off.
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes or IGNI-
TION ON mode (the engine is not running) for more than an hour with the
shift lever in P, the engine switch will automatically turn off. However, this
function cannot entirely prevent battery discharge. Do not leave the vehicle
with the engine switch in ACCESSORY or IGNITION ON mode for long peri-
ods of time when the engine is not running.
■Electronic key battery depletion
P. 9 3
■Conditions affecting operation
P. 106
■Notes for the entry function
P. 107
■If the engine does not start
The engine immobilizer system may not have been deactivated. (P. 70)
Contact your Toyota dealer.
■Steering lock
After turning the engine switch off and opening and closing the doors, the
steering wheel will be locked due to the steering lock function. Operating the
engine switch again automatically cancels the steering lock.
When stopping the engine with the shift lever in a position other
than P
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1974-2. Driving procedures
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Driving
4RUNNER (U)_(OM35B23U)■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be sus-
pended if the engine is turned on and off repeatedly in a short period of time.
In this case, refrain from operating the engine. After about 10 seconds, the
steering lock motor will resume functioning.
■When the engine switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your
Toyota dealer immediately.
■If the electronic key battery is depleted
P. 379
■Operation of the engine switch
When operating the engine switch, one short, firm press is enough. If the
switch is pressed improperly, the engine may not start or the engine switch
mode may not change. It is not necessary to press and hold the switch. The green indicator light on the engine
switch will flash. Press the engine switch
again while turning the steering wheel left
and right.