2014 Lexus IS250 key battery

1313-2. Opening, closing and locking the doors and trunk
3
Operation of each component
IS250_EE(OM53C51E)
■Battery-saving function (vehicles with entry function)
The battery-saving function will be activated in order to prevent the electronic key bat-
tery and the battery from being discharged while the vehicle is not in operation for a long
time.
●In the following situations, the smart entry & start system may take some time to unlock
the doors.
• The electronic key has been left within approximately 2 m (6 ft.) of the outside of the
vehicle for 10 minutes or longer.
• The smart entry & start system has not been used for 5 days or longer.
●If the smart entry & start system has not been used for 14 days or longer, the doors can-
not be unlocked at any door except the driver’s door. In this case, hold the driver’s door
handle, or use the wireless remote control or mechanical key, to unlock the doors.
■Electronic Key battery-Saving Function
When battery-saving mode is set, battery depletion is minimized by stopping the elec-
tronic key from receiving radio waves.
Press twice while pressing and holding
. Confirm that the electronic key indica-
tor flashes 4 times.
While the battery-saving mode is set, the smart
entry & start system cannot be used. To cancel
the function, press any of the electronic key but-
tons.

1323-2. Opening, closing and locking the doors and trunk
IS250_EE(OM53C51E)
■Conditions affecting operation
The smart entry & start system uses weak radio waves. In the following situations, the
communication between the electronic key and the vehicle may be affected, preventing
the smart entry & start system, wireless remote control and engine immobilizer system
from operating properly. (Ways of coping: →P. 5 2 4 )
●When the electronic key battery is depleted
●Near a TV tower, electric power plant, gas station, radio station, large display, airport or
other facility that generates strong radio waves or electrical noise
●When carrying a portable radio, cellular phone, cordless phone or other wireless com-
munication device
●When the electronic key is in contact with, or is covered by the following metallic
objects
• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil inside
• Metallic wallets or bags
•Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
●When other wireless keys (that emit radio waves) are being used nearby
●When carrying the electronic key together with the following devices that emit radio
waves
• Another vehicle’s electronic key or a wireless key that emits radio waves
• Personal computers or personal digital assistants (PDAs)
• Digital audio players
• Portable game systems
●If window tint with a metallic content or metallic objects are attached to the rear win-
dow

1333-2. Opening, closing and locking the doors and trunk
3
Operation of each component
IS250_EE(OM53C51E)
■Note for the entry function (if equipped)
●Even when the electronic key is within the effective range (detection areas), the system
may not operate properly in the following cases:
• The electronic key is too close to the window or outside door handle, near the
ground, or in a high place when the doors are locked or unlocked.
• The electronic key is near the ground or in a high place, or too close to the rear
bumper center when the trunk is opened.
●Do not leave the electronic key on top of the instrument panel or near the door pockets
when exiting the vehicle. Depending on the radio wave reception conditions, it may be
detected by the antenna outside the cabin and the doors will become lockable from the
outside, possibly trapping the electronic key inside the vehicle.
●As long as the electronic key is within the effective range, the doors may be locked or
unlocked by anyone. However, only the doors detecting the electronic key can be used
to unlock the vehicle.
●The doors may unlock or lock if a large amount of water splashes on the door handle,
such as in the rain or in a car wash, when the electronic key is within the effective range.
(The doors will automatically be locked after approximately 30 seconds if the doors
are not opened and closed.)
●If the wireless remote control is used to lock the doors when the electronic key is near
the vehicle, there is a possibility that the door may not be unlocked by the entry func-
tion. (Use the wireless remote control to unlock the doors.)
●Touching the door lock or unlock sensor while wearing gloves may prevent lock or
unlock operation.
●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, follow the following correction
procedures to wash the vehicle:
• Place the electronic key in a location 2 m (6 ft.) or more away from the vehicle. (Take
care to ensure that the key is not stolen.)
• Set the electronic key to battery-saving mode to disable the smart entry & start sys-
tem. (→P. 131)
●If the electronic key is inside the vehicle and a door handle becomes wet during a car
wash, a message may be shown on the multi-information display and a buzzer will
sound outside the vehicle. To turn off the alarm, lock all the doors.
●The lock sensor may not work properly if it comes into contact with ice, snow, mud, etc.
Clean the lock sensor and attempt to operate it again, or use the lock sensor on the
lower part of the door handle.
●A sudden handle operation or a handle operation immediately after entering the effec-
tive range may prevent the doors from being unlocked. Touch the door unlock sensor
and check that the doors are unlocked before pulling the door handle again.
●Unlocking the vehicle may take more time if another electronic key is within the effec-
tive range.

1693-5. Opening, closing the windows and moon roof
3
Operation of each component
IS250_EE(OM53C51E)
■Door lock linked window operation
●The power windows can be opened and closed using the mechanical key.*
(→P. 5 2 4 )
●The power windows can be opened and closed using the wireless remote control.*(→P. 1 1 8 )
*: These settings must be customized at any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
■When the battery is disconnected
The window lock switch is disabled. If necessary, press the window lock switch after
reconnecting the battery.
■Power windows open warning buzzer
The buzzer sounds and a message is shown on the multi-information display in the instru-
ment cluster when the engine switch is turned off and the driver’s door is opened with the
power windows open.
■Customization
Settings (e.g. linked door lock operation) can be changed.
(Customizable features: →P. 551)
CAUTION
Observe the following precautions.
Failure to do so may result in death or serious injury.
■Closing the windows
●The driver is responsible for all the power window operations, including the operation
for the passengers. In order to prevent accidental operation, especially by a child, do
not let a child operate the power windows. It is possible for children and other passen-
gers to have body parts caught in the power window. Also, when riding with a child, it
is recommended to use the window lock switch. (→P. 1 6 7 )
●Check to make sure that all passengers do not have any part of their body in a posi-
tion where it could be caught when a window is being operated.
●When using the wireless remote control or mechanical key and operating the power
windows, operate the power window after checking to make sure that there is no pos-
sibility of any passenger having any of their body parts caught in the window. Also do
not let a child operate window by the wireless remote control or mechanical key. It is
possible for children and other passengers to get caught in the power window.
●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
window fully closes.

1944-2. Driving procedures
IS250_EE(OM53C51E)
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes or IGNITION 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 IGNI-
TION ON mode for long periods of time when the engine is not running.
■Electronic key battery depletion
→P. 1 1 5
■Conditions affecting operation
→P. 1 3 2
■Notes for the entry function
→P. 1 3 3
■If the engine does not start
●Check that the shift lever is securely set in P. The engine may not start if the shift lever is
displaced out of P.
●The engine immobilizer system may not have been deactivated. (→P. 77)
Contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
■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 auto-
matically cancels the steering lock.
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, operation of 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 switch. After about 10 seconds, the steering lock
motor will resume functioning. “Steering Lock active” will be displayed on the
multi-information display.
Check that the shift lever is in P. Press the
engine switch while turning the steering wheel
left and right.

1954-2. Driving procedures
4
Driving
IS250_EE(OM53C51E)
■When “Check Entry & Start System” is displayed on the multi-information display
The system may be malfunctioning. Have the vehicle inspected by any authorized Lexus
dealer or repairer, or another duly qualified and equipped professional immediately.
■If the electronic key battery is depleted
→P. 5 2 1
■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.
●If attempting to restart the engine immediately after turning the engine switch off, the
engine may not start in some cases. After turning the engine switch off, please wait a
few seconds before restarting the engine.
■If the smart entry & start system has been deactivated by a customized setting
→P. 5 2 4
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
If engine failure occurs while the vehicle is moving, do not lock or open the doors until
the vehicle reaches a safe and complete stop. Activation of the steering lock in this cir-
cumstance may lead to an accident, resulting in death or serious injury.
■Stopping the engine in an emergency
If you want to stop the engine in an emergency while driving the vehicle, press and hold
the engine switch for more than 2 seconds, or press it briefly 3 times or more in succes-
sion. (→P. 4 6 7 )
However, do not touch the engine switch while driving except in an emergency. Turning
the engine off while driving will not cause loss of steering or braking control, but the
power assist to these systems will be lost. This will make it more difficult to steer and
brake, so you should pull over and stop the vehicle as soon as it is safe to do so.

3906-2. Using the interior lights
IS250_EE(OM53C51E)
Turns the light on/off
Turns the door position on/off
Turns the light on/off
●Illuminated entry system: The lights automatically turn on/off according to engine
switch mode, the presence of the electronic key, whether the doors are locked/
unlocked, and whether the doors are opened/closed.
●If the interior lights remain on when the door is not fully closed and the interior light
main switch is in the door position, the lights will go off automatically after 20 minutes.
●Setting (e.g. the time elapsed before lights turn off) can be changed.
(Customizable features: →P. 551)
Interior lights
1
2
Personal lights
XFrontXRear
NOTICE
To prevent battery discharge, do not leave the lights on longer than necessary when the
engine is off.

403
7Maintenance and care
IS250_EE(OM53C51E)
7-1. Maintenance and care
Cleaning and protecting
the vehicle exterior................. 404
Cleaning and protecting
the vehicle interior..................408
7-2. Maintenance
Maintenance
requirements................................ 411
7-3. Do-it-yourself maintenance
Do-it-yourself service
precautions..................................413
Hood ................................................ 415
Positioning a floor jack ...............416
Engine compartment ................. 417
Tires...................................................427
Tire inflation pressure ............... 436
Wheels ...........................................438
Air conditioning filter ............... 440
Electronic key battery .............. 442
Checking and replacing
fuses.............................................. 445
Light bulbs..................................... 449