2016 TOYOTA 4RUNNER key battery

3816-3. Do-it-yourself maintenance
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Maintenance and care
4RUNNER (U)_(OM35B23U)
■Use a CR2016 (vehicles without a smart key system) or CR1632 (vehicles
with a smart key system) 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.
CAUTION
■Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. Failure to do so could result in death or serious
injury.
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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When trouble arises7
4RUNNER (U)_(OM35B23U)7-1. 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

4277-2. Steps to take in an emergency
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When trouble arises
4RUNNER (U)_(OM35B23U)
Once
An attempt was made to start
the engine with the shift lever in
an incorrect position.
Shift the shift lever to P
and start the engine.

Power was turned off due to the
automatic power off function.
Next time when starting
the engine, increase the
engine speed slightly and
maintain that level for
approximately 5 minutes
to recharge the battery.
Once
The electronic key has a low
battery.
Replace the electronic key
battery. (P. 380)
Once
The driver’s door was opened
and closed with the engine
switch turned off and then the
engine switch was put in
ACCESSORY or IGNITION ON
mode twice without the engine
being started.
Press the engine switch
while depressing the brake
pedal.
During an engine starting pro-
cedure in the event that the
electronic key was not function-
ing properly (P. 446), the
engine switch was touched with
the electronic key.
Press the engine switch
while depressing the brake
pedal within 10 seconds of
the buzzer sounding.
Interior
buzzerExterior
buzzerWarning messageDetails/Actions
(Flashes)
(Flashes)

4437-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)_(OM35B23U)
One of the following may be the cause of the problem:
●One or both of the battery terminals may be disconnected.
●The battery may be discharged. (P. 448)
●There may be a malfunction in the steering lock system (vehicles
with a smart key system).
Contact your Toyota dealer if the problem cannot be repaired, or if repair
procedures are unknown.
When the engine does not start, the following steps can be used as an
interim measure to start the engine if the engine switch is functioning
normally:
Set the parking brake.
Shift the shift lever to P.
Turn the engine switch to ACCESSORY mode.
Press and hold the engine switch for about 15 seconds while
depressing the brake pedal firmly.
Even if the engine can be started using the above steps, the system
may be malfunctioning. Have the vehicle inspected by your Toyota
dealer.
The starter motor does not turn over, the interior lights and head-
lights do not turn on, or the horn does not sound.
Emergency start function (vehicles with a smart key system)
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4467-2. Steps to take in an emergency
4RUNNER (U)_(OM35B23U)
Use the mechanical key
(P. 92) in order to perform the
following operations:
Locks all the doors
Closes the windows and moon
roof (turn and hold)
*
(P. 146, 154)
Unlocks all the doors
Turning the key rearward unlocks the driver’s door. Turning the key once
again unlocks the other doors.
Opens the windows and moon roof (turn and hold)*
(P. 146, 154)
*: This setting must be customized at your Toyota dealer.
If the electronic key does not operate
properly (vehicles with a smar t key system)
If communication between the electronic key and vehicle is
interrupted (P. 106) or the electronic key cannot be used
because the battery is depleted, the smart key system and wire-
less remote control cannot be used. In such cases, the doors
can be opened and the engine can be started by following the
procedure below.
Locking and unlocking the doors
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4477-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)_(OM35B23U)
Ensure that the shift lever is in P and depress the brake pedal.
Touch the Toyota emblem side
of the electronic key to the
engine switch.
If any of the doors is opened or
closed while the key is being
touched to the switch, an alarm will
sound to indicate that the start
function cannot detect the key.
Press the engine switch.
In the event that the engine still cannot be started, contact your Toyota
dealer.
■Stopping the engine
Shift the shift lever to P and press the engine switch as you normally do when
stopping the engine.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
(P. 380)
■Changing engine switch modes
Within 10 seconds of the buzzer sounding, release the brake pedal and press
the engine switch.
The engine does not start and modes will be changed each time the switch is
pressed.(P. 195)
Starting the engine
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CAUTION
■When using the mechanical key and operating the power windows,
power back window or moon roof
Operate the power windows, power back window or moon roof after check-
ing to make sure that there is no possibility of any passenger having any of
their body parts caught in the window or moon roof.
Also, do not allow children to operate the mechanical key. It is possible for
children and other passengers to get caught in the power windows, power
back window or moon roof.

4487-2. Steps to take in an emergency
4RUNNER (U)_(OM35B23U)
If you have a set of jumper (or booster) cables and a second vehicle
with a 12-volt battery, you can jump start your vehicle by following the
steps below.
Confirm that the electronic key
is being carried.
When connecting the jumper (or
booster) cables, depending on the
situation, the alarm may activate
and doors locked. (P. 73)
Open the hood (P. 349)
If the vehicle batter y is discharged
The following procedures may be used to start the engine if the
vehicle’s battery is discharged.
You can also call your Toyota dealer or a qualified repair shop.
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4497-2. Steps to take in an emergency
7
When trouble arises
4RUNNER (U)_(OM35B23U)
Connect the jumper cables according to the following procedure:
Connect a positive jumper cable clamp to the positive (+) battery
terminal on your vehicle.
Connect the clamp on the other end of the positive cable to the
positive (+) battery terminal on the second vehicle.
Connect a negative cable clamp to the negative (-) battery termi-
nal on the second vehicle.
Connect the clamp at the other end of the negative cable to a
solid, stationary, unpainted metallic point away from the battery
and any moving parts, as shown in the illustration.
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the battery of your vehicle.
Vehicles with a smart key system only: Open and close any of the
doors of your vehicle with the engine switch off.
Maintain the engine speed of the second vehicle and start the
engine of your vehicle by turning the engine switch to the “ON”
position (vehicles without a smart key system) or turning the engine
switch to IGNITION ON mode (vehicles with a smart key system).
Once the vehicle’s engine has started, remove the jumper cables in
the exact reverse order from which they were connected.
Once the engine starts, have the vehicle inspected at your Toyota
dealer as soon as possible.3
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