2010 Lexus IS250C key battery

41
1-2. Opening, closing and locking the doors and trunk
1
Before driving
10_IS250C/350C_U
■Pa n i c m o d e
■Electronic key battery depletion
→P. 3 4
■Security feature
→P. 3 6
■When the electronic key battery is fully depleted
→P. 4 2 5
■Conditions affecting operation
→P. 3 2
■Customization that can be configured at Lexus dealer
Settings (e.g. trunk unlocking function) can be changed.
(Customizable features →P. 5 5 7 ) 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.

145
2-1. Driving procedures
2
When driving
10_IS250C/350C_U
■If the engine does not start
The engine immobilizer system may not have been deactivated. (→P. 9 3 )
■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 for 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 4
■When the electronic key battery is fully discharged
→P. 4 2 5
■Conditions affecting operation
→P. 3 2
■Note for the entry function
→P. 3 5 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.

175
2-3. Operating the lights and windshield wipers
2
When driving
10_IS250C/350C_U
■Automatic light off system
●When the headlights comes on: The headlights and tail lights turn off 30 sec-
onds 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 automatically 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.
■If “AFS OFF” flashes... (vehicles with discharge headlights)
It may indicate a malfunction in the system. Contact your Lexus dealer.
■Customization that can be configured at Lexus dealer
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features →P. 5 5 7 )
NOTICE
■To prevent battery discharge
Do not leave the lights on longer than necessary when the engine is not running.

Maintenance and care4
373
10_IS250C/350C_U
4-1. Maintenance and careCleaning and protecting the vehicle exterior............. 374
Cleaning and protecting the vehicle interior .............. 377
4-2. Maintenance Maintenance requirements ....................... 380
General maintenance ......... 382
Emission inspection and maintenance (I/M)
programs............................... 385 4-3. Do-it-yourself
maintenance
Do-it-yourself service precautions ........................... 386
Hood .......................................... 389
Positioning a floor jack ......... 390
Engine compartment ........... 392
Tires............................................ 406
Tire inflation pressure............ 416
Wheels ...................................... 420
Air conditioning filter ........... 422
Electronic key battery.......... 425
Checking and replacing fuses ...................... 427
Headlight aim ......................... 442
Light bulbs................................ 444

425
4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS250C/350C_U
Electronic key battery
Replace the battery with a new one if it is discharged.
■You will need th e following items:
● Flathead screwdriver
● Small Phillips-head screwdriver
● 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

426
4-3. Do-it-yourself maintenance
10_IS250C/350C_U
■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.
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 components inside the remote control.
●Do not bend either of the battery terminals.

When trouble arises5
451
10_IS250C/350C_U
5-1. Essential informationEmergency flashers............... 452
If your vehicle needs to be towed................................. 453
If you think something is wrong .................................. 459
Fuel pump shut off system.... 460
Event data recorder ............... 461 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... ................................. 463
If a warning message is displayed ............................ 472
If you have a flat tire (vehicles with standard
tires) ........................................ 486
If you have a flat tire (vehicles with run-flat
tires) ........................................ 495
If the engine will not start ..... 497
If the shift lever cannot be shifted from P ................. 499
If you lose your keys .............. 500
If the electronic key does not operate properly........... 501
If the vehicle battery is discharged......................... 506
If your vehicle overheats ..... 509
If the vehicle becomes stuck......................................... 512
If the retractable hardtop does not close ....... 514

5
When trouble arises
483
5-2. Steps to take in an emergency
10_IS250C/350C_U
InteriorbuzzerExterior buzzerMessageDetailsCorrection
procedure
Once3 times
(Vehicles with an auto-
matic transmission)
(Flashing)
Indicates that the
driver’s door has
been opened or
closed with the
shift lever in P, the
“ENGINE START
STOP” switch in
any mode other
than OFF and the
electronic key
outside of the
detection area.
Tu r n t h e
“ENGINE START
STOP” switch
OFF or confirm
the location of the
electronic key.
OnceCon-
tinuous
(Displayed alternately)
(Vehicles with an auto-matic transmission)
(Flashing)
Indicates that the
driver’s door has
been opened or
closed (with the
shift lever out of in
P, t h e “ E N G I N E
START STOP”
switch in any
mode other than
OFF and the elec-
tronic key outside
of the detection
area).
• Shift the shift lever to P.
•Confirm the
location of the
electronic key.
Once
(Flashing)
Indicates that the
key battery is low.Replace the bat-
tery. ( →P. 4 2 5 )