2015 TOYOTA TUNDRA key battery

811-2. Theft deterrent system
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For safety and security
■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 (if equipped) 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 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.

1023-2. Opening, closing and locking the doors
■Conditions affecting operation (veh icles with wireless remote control)
The wireless remote control function may not operate normally in the following
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 device
● When multiple wireless keys are in the vicinity
● When the wireless key has come into contact with, or is covered by a metal-
lic 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
■ Wireless remote control battery depletion (vehicles with wireless remote
control)
If the wireless remote control function does not operate, the battery may be
depleted. Replace the battery when necessary. ( P. 433)
■ When riding in an aircraft (vehicles with wireless remote control)
When bringing a wireless key onto an aircraft, make sure you do not press
any buttons on the wireless key while inside the aircraft cabin. If you are car-
rying a wireless key in your bag, etc., ensure that the buttons are not likely to
be pressed accidentally. Pressing a button may cause the wireless key to
emit radio waves that could interfere with the operation of the aircraft.
■ Certification for wireless remote cont rol (vehicles with wireless remote
control)
For vehicles sold in the U.S.A.
NOTE:
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful interfer-
ence, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
For vehicles sold in Canada
NOTE:
Operation is subject to the following two conditions: (1) This device may not
cause interference, and (2) this device must accept any interference, includ-
ing interference that may cause undesired operation of the device.

1433-5. Opening, closing the windows and moon roof
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Operation of each component
■Moon roof open reminder function
The buzzer sounds when the engine switch is turned to the “LOCK” position
and the driver’s door is opened with the moon roof open.
■ When the battery is disconnected
The moon roof must be initialized in order to ensure proper operation.
Push and hold the switch toward the “UP” (tilt up) side or “ ▼” (sliding
close) side.
After the moon roof will tilt up and down, release the switch.
To ensure the initialization is complete, make sure automatic opening and
closing functions work properly.
■ Customization that can be co nfigured at Toyota dealer
Settings (e.g. linked door lock operation) can be changed.
(Customizable features: P. 534)
CAUTION
Observe the following precautions.
Failure to do so may cause death or serious injury.
■Opening the moon roof
● Do not allow any passengers to put their hands or heads outside the vehi-
cle while it is moving.
● Do not sit on top of the moon roof.
■ Closing the moon roof
● The driver is responsible for moon roof opening and closing operations. In
order to prevent accidental operation, especially by a child, do not let a
child operate the moon roof. It is possible for children and other passen-
gers to have body parts caught in the moon roof.
● Check to make sure that all passengers do not have any part of their body
in a position where it could be caught when the moon roof is being oper-
ated.
● When using the key and operating the moon roof, operate the moon roof
after checking to make sure that there is no possibility of any passenger
having any of their body parts caught in the moon roof. Also, do not let a
child operate moon roof by the key. It is possible for children and other
passengers to get caught in the moon roof.
● When exiting the vehicle, turn the engine switch off, carry the key and exit
the vehicle along with the child. There may be accidental operation, due to
mischief, etc., that may possibly lead to an accident.
■ Jam protection function
● Never use any part of your body to intentionally activate the jam protection
function.
● The jam protection function may not work if something gets caught just
before the moon roof fully closes.
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1804-2. Driving procedures
■When the steering lock cannot be released
■ Key reminder function
A buzzer sounds if the driver’s door is opened while the engine switch is in
the “ACC” or “LOCK” position to remind you to remove the key. When starting the engine, the engine
switch may seem stuck in the “LOCK”
position. To free it, turn the key while turn-
ing the steering wheel slightly left and
right.
CAUTION
■When starting the engine
Always start the engine while sitting in the driver’s seat. Do not depress the
accelerator pedal while starting the engine under any circumstances.
Doing so may cause an accident resulting in death or serious injury.
■ Caution while driving
Do not turn the engine switch to the “LOCK” position while driving. If, in an
emergency, you must turn the engine off while the vehicle is moving, turn
the engine switch only to the “ACC” position to stop the engine. A\
n accident
may result if the engine is stopped while driving. ( P. 457)
NOTICE
■To prevent battery discharge
Do not leave the engine switch in the “ACC” or “ON” position for long peri-
ods of time without the engine running.
■ When starting the engine
● Do not crank the engine for more than 30 seconds at a time. This may
overheat the starter and wiring system.
● Do not race a cold engine.
● If the engine becomes difficult to star t or stalls frequently, have your vehi-
cle checked by your Toyota dealer immediately.

1904-3. Operating the lights and wipers
■Daytime running light system (if equipped)
●To make your vehicle more visible to other drivers, the daytime running
lights turn on automatically whenever the engine is started and the parking
brake is released. Daytime running lights are not designed for use at night.
● Compared to turning on the headlights, the daytime running light system
offers greater durability and consumes less electricity, so it can help improve
fuel economy.
■ Headlight control sensor (vehicl es with automatic headlight system)
■ Automatic light off system
●When the headlights come on: The headlights and tail lights turn off 30 sec-
onds after a door is opened and closed if the engine switch is turned to the
“ACC” or “LOCK” position. (The lights turn off immediately if the button
on the key is pressed after all the doors are locked.)
● When only the tail lights come on: The tail lights turn off automatically if the
engine switch is tuned to the “ACC” or “LOCK” position and the driver’s door
is opened.
Vehicles with automatic headlight system: If any of the doors is kept open, the
lights automatically turn off after 20 minutes.
To turn the lights on again, turn the engine switch to the “ON” position, or turn
the light switch off once and then back to or .
■ Light reminder buzzer
A buzzer sounds when the key is removed from the engine switch and the
driver’s door is opened while the lights are turned on.
■ Customization that can be co nfigured at Toyota dealer
Settings (automatic light off system) can be changed.
(Customizable features: P. 534)
The sensor may not function properly if an
object is placed on the sensor, or anything
that blocks the sensor is affixed to the
windshield.
Doing so interferes with the sensor
detecting the level of ambient light and
may cause the automatic headlight sys-
tem to malfunction.
NOTICE
■
To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not
running.

4347-3. Do-it-yourself maintenance
■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 key battery is depleted
The following symptoms may occur:
●The wireless remote control will not function properly.
● The operational range will be reduced.
CAUTION
■Removed battery and other parts
Keep away from children. These parts are small and if swallowed by a child,
they can cause choking. 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.

4958-2. Steps to take in an emergency
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When trouble arises
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the batter y of your vehicle.
Maintain the engine speed of t he second vehicle and start the
engine of your vehicle.
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.
■ Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■ To prevent battery discharge
●Turn off the headlights and the audio system while the engine is off.
● Turn off any unnecessary electrical components when the vehicle is running
at a low speed for an extended period, such as in heavy traffic.
■ When the battery is removed or discharged
●The moon roof must be initialized. ( P. 143)
● Flex-fuel vehicles: The information recorded in the computer will be cleared,
which may cause the engine to run roughly and reduce driving performance
for a while when the engine is first started. In this case, wait until the engine
runs normally.
If the vehicle is running on E85, the engine may stall.
In this case, restart the engine, repeatedly if necessary.
● Vehicles with alarm: Make sure that the key is not inside the vehicle when
recharging or replacing the battery. The key may be locked in the vehicle if
the alarm is activated. (P. 81)
■ Charging the battery
The electricity stored in the battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the battery may
discharge, and the engine may be unable to start. (The battery recharges
automatically during driving.)
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562What to do if... (Troubleshooting)
What to do if... (Troubleshooting)
●If you lose your keys, new genuine keys can be made by your Toyota
dealer. (P. 98)
●Is the wireless key battery weak or depleted? ( P. 433)
●The function may not operate properly due to the condition of the radio
wave. (P. 102)
●Is the child-protector lock set?
The rear door cannot be opened from inside the vehicle when the lock is
set. Open the rear door from outside and then unlock the child-protector
lock. (P. 104)
●Is the shift lever in P? ( P. 179)
●Is the battery discharged? ( P. 494)
●Is the engine switch in the “ON” position?
If you cannot release the shift lever by depressing the brake pedal with the
engine switch in the “ON” position. ( P. 492)
If you have a problem, check the following before contacting
your Toyota dealer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened
If you think something is wrong The engine does not start
The shift lever cannot be shifted from P even if you depress
the brake pedal