2012 Lexus IS250C key battery

45
1-2. Opening, closing and locking the doors and trunk
1
Before driving
■Pa n i c m o d e
■Electronic key battery depletion
P. 3 8
■Security feature
P. 4 0
■When the electronic key battery is fully depleted
P. 4 5 6
■Conditions affecting operation
P. 3 6
■Customization that can be configured at Lexus dealer
Settings (e.g. trunk unlocking function) can be changed.
(Customizable features  P. 5 9 5 )
When is pushed for longer than about
one second, an alarm will sound for about 60
seconds and the vehicle lights will flash to
deter any person from trying to break into or
damage your vehicle.
To stop the alarm, push any button on the
wireless remote control.

102
1-6. Theft deterrent system
■When the battery is disconnected
Be sure to deactivate the alarm system.
If the battery is disconnected before deactivating the alarm system, the alarm may
be triggered when the battery is reconnected.
■Alarm-operated door lock
●When the alarm is operating, the door s 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.
NOTICE
■To ensure the system operates correctly
Do not modify or remove the system. If mo dified or removed, the proper operation
of the system cannot be guaranteed.

151
2-1. Driving procedures
2
When driving
■If the engine does not start
The engine immobilizer system may not have been deactivated. (P. 9 8 )
■When the steering lock cannot be released
■When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your Lexus
dealer immediately.
■Auto power off function
If the vehicle is left in ACCESSORY mode fo r more than an hour with the shift lever
in P (vehicles with an automatic transmission), the “ENGINE START STOP” switch
will automatically turn OFF.
■Electronic key battery depletion
 P. 3 8
■When the electronic key battery is fully discharged
P. 4 5 6
■Conditions affecting operation
P. 3 6
■Note for the entry function
P. 3 9
The “ENGINE START STOP” switch indica-
tor will flash in green and a message will be
shown on the multi-information display. Press
the “ENGINE START STOP” switch again
while turning the steering wheel left and right.

184
2-3. Operating the lights and windshield wipers
■Automatic light off system
●When the headlights come on: The headlights and tail lights turn off 30 seconds
after a door is opened and closed if the “ENGINE START STOP” switch has
been switched to ACCESSORY mode or turned OFF. (The light turns off
immediately if on the key is pressed after both side doors are locked.)
●When only the tail lights come on: The tail lights turn off automatically if the
“ENGINE START STOP” switch is switched to ACCESSORY mode or turned
OFF and driver’s door is opened.
To turn the lights on again, switch to IGNITION ON mode, or turn the light switch
off once and then back to or
.
■Automatic headlight leveling system (vehicles with discharge headlights)
The level of the headlights is automatica lly adjusted according to the number of
passengers and the loading condition of the vehicle to ensure that the headlights do
not interfere with other road users.
■Customization that can be configured at Lexus dealer
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features P. 5 9 5 )
NOTICE
■To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not running.

Maintenance and care4
401
4-1. Maintenance and careCleaning and protecting the vehicle exterior............ 402
Cleaning and protecting the vehicle interior .............. 407
4-2. Maintenance Maintenance requirements ......................... 410
General maintenance ........... 412
Emission inspection and maintenance (I/M)
programs
.................................. 415 4-3. Do-it-yourself
maintenance
Do-it-yourself service precautions ............................ 416
Hood ........................................... 419
Positioning a floor jack ......... 420
Engine compartment ........... 422
Tires............................................ 437
Tire inflation pressure........... 447
Wheels ....................................... 451
Air conditioning filter ........... 453
Electronic key battery.......... 456
Checking and replacing fuses ........................................ 458
Headlight aim ......................... 473
Light bulbs ................................. 475

456
4-3. Do-it-yourself maintenance
Electronic key battery
Replace the battery with a new one if it is discharged.
■You will need the following items:
●Flathead screwdriver
● Small Phillips-head sc rewdriver
● Lithium battery (CR1632)
■ Replacing the battery
Take out the mechanical key.
Remove the cover.
Remove the depleted battery.
Insert a new battery with the “+”
terminal facing up.
STEP1
STEP2
STEP3

457
4-3. Do-it-yourself maintenance
4
Maintenance and care
■If the electronic key battery is discharged
The following symptoms may occur.
●The smart access system with push-button start and wireless remote control will
not function properly.
●The operational range is reduced.
■Use a CR1632 lithium battery
●Batteries can be purchased at your Lexus dealer, jewelers, or camera stores.
●Replace only with the same or equivalent type recommended by a Lexus dealer.
●Dispose of used batteries according to the local laws.
■When the card key battery needs to be replaced (if equipped)
The battery for the card key is available only at Lexus dealers. Your Lexus dealer
can replace the battery for you.
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 comp onents inside the remote control.
●Do not bend either of the battery terminals.

When trouble arises5
485
5-1. Essential informationEmergency flashers............... 486
If your vehicle needs to be towed................................. 487
If you think something is wrong .................................. 493
Fuel pump shut off system.... 494 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... ................................. 495
If a warning message is displayed................................ 504
If you have a flat tire (vehicles with standard
tires) ......................................... 518
If you have a flat tire (vehicles with run-flat
tires) ........................................ 527
If the engine will not start .... 529
If the shift lever cannot be shifted from P .................. 531
If you lose your keys .............. 532
If the electronic key does not operate properly.......... 533
If the vehicle battery is discharged......................... 538
If your vehicle overheats ..... 542
If the vehicle becomes stuck........................................ 545
If the retractable hardtop does not close ...................... 547
If your vehicle has to be stopped in an
emergency ............................ 557