Lexus IS250 2008 Quick Guide
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Entering and Exiting
Before Driving
When Driving
Rain and 
Night Driving
Driving Comfort
Opening and Closing
What to do if ...
Customizing Your Lexus
If the electronic key does not operate 
properly
■ Unlocking and locking the doors
To unlock or lock the vehicle, use the mechanical
key to remove the lock cover on the driver's door
handle. The mechanical key is stored inside the
electronic key.
Unlocks
Locks
■Starting the engine
Depress the brake pedal (for automatic trans-
mission) or clutch pedal (for manual transmis-
sion).
Touch the Lexus emblem side of the electronic
key to the “ENGINE START STOP” switch.
Press the “ENGINE START STOP” switch
within 10 seconds of the buzzer, keeping the
brake pedal (for automatic transmission) or
clutch pedal (for manual transmission)
depressed.
1
2
If the electronic key battery becomes depleted , replace it with a new battery. For instruc-
tions on replacing the battery, refer to the Ow ner's Manual. If you need further assistance,
contact your Lexus dealer. 
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What to do if ...
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If the engine doesn't start
Make sure that the correct operating procedures have been followed.Make sure that the brake pedal (for automatic
transmission) or clutch pedal (for manual trans-
mission) is firmly depressed when attempting to
start the engine. (  →P.1 7 )
 Automatic transmission
 Manual transmission
u tomatic transmissin
Make sure that the steering wheel lock is released.
To release the steering wheel lock, gently turn the
wheel left or right while pressing the “ENGINE
START STOP” switch. ( →P.9 )
Electronic key alarm
Brake/clutch pedal
Steering wheel lock
If the engine still does not st art, see the Owner's Manual fo r more information or contact
your Lexus dealer. 
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Entering and Exiting
Before Driving
When Driving
Rain and 
Night Driving
Driving Comfort
Opening and Closing
What to do if ...
Customizing Your Lexus
Electronic Key Alarm
The electronic key alarm uses an alarm and warn ing messages to indicate that the electronic 
key has been used improperly. Take appropri ate measure in response to any warning mes-
sages that are displayed. In some cases, an  alarm may sound without an accompanying 
warning message. If so, follow the co rrection procedure in the table below.
*: Vehicles with automatic transmission only
AlarmSituationCorrection procedure
Exterior alarm sounds 
once for 2 seconds
Tried to lock the doors 
using the entry function 
while the electronic key is 
still inside the passenger 
compartmentRetrieve the electronic key 
from the passenger com-
partment and lock the 
doors again.
Closed the trunk while the 
electronic key is still inside 
and all doors are lockedRetrieve the electronic key 
from the trunk and close 
the trunk lid.
Exterior alarm sounds 
once for 60 seconds
Tried to exit the vehicle 
with the electronic key and 
lock the doors without first 
turning the “ENGINE 
START STOP” switch OFF
Turn the “ENGINE START 
STOP” switch OFF and 
lock the doors again.
Exterior alarm sounds 
once for 10 secondsTried to lock the vehicle 
using the entry function 
while a door is openClose all of the doors and 
lock the doors again.
Interior alarm sounds 
continuously*Tried to open the door and 
exit the vehicle without 
shifting the shift lever to P
Shift the shift lever to P.
Interior alarm pings 
continuously
Switched to ACCES-
SORY mode while the 
driver's door is open 
(Opened the driver's door 
when the “ENGINE 
START STOP” switch is in 
ACCESSORY mode.)
Turn the “ENGINE START 
STOP” switch OFF and 
close the driver's door.
Tu r n e d  t h e  “ E N G I N E  
START STOP” switch OFF 
while the driver's door is 
still open
Close the driver's door. 
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Customizing Your Lexus
53
Your vehicle includes a variety of electronic features that can be personalized to your
preferences. Programming these preferences requires specialized equipment and may
be performed by an authorized Lexus dealership.
Some function settings are changed simultaneously with other functions being customized.
Contact your Lexus dealer for further details.
ItemFunctionDefault  settingCustomized setting
Smart access 
system with 
push-button start  
Smart access system with 
push-button startONOFF
Operation signal
(Emergency flashers)ONOFF
Operation signal
(Buzzer)ONOFF
Wireless remote 
control
Wireless remote controlONOFF
Unlocking operation
Driver's door unlocked in 
one step, all  doors 
unlocked in  two steps
All doors 
unlocked in  one step
Time elapsed before auto-
matic door lock function is 
activated if door is not opened 
after being unlocked
30 seconds
60 seconds
120 seconds
Automatic door lock function 
to be activated if door is not 
opened after being unlocked
ONOFF
Operation signal
(Emergency flashers)ONOFF
Operation signal 
(Buzzer)ONOFF
Trunk unlocking functionONOFF
Trunk unlocking operationPush and hold Push twice
One short push
Panic functionONOFF 
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Entering and Exiting
Before Driving
When Driving
Rain and 
Night Driving
Driving Comfort
Opening and Closing
What to do if ...
Customizing Your Lexus
ItemFunctionDefault 
settingCustomized setting
Door lock
Unlocking using a key
Driver's door 
unlocked in 
one step, all 
doors 
unlocked in 
two steps
All doors 
unlocked in 
one step
Speed-detecting automatic 
door lock function
 (Manual transmissions)
ONOFF
Speed-detecting automatic 
door lock function
 (Automatic transmissions)
OFFON
Opening driver's door unlocks 
all doors 
(Manual transmissions)
ONOFF
Opening driver's door unlocks 
all doors 
(Automatic transmissions)
OFFON
Shifting gears to P unlocks all 
doors.ONOFF
Shifting gears to position other 
than P locks all doors.ONOFF
Pow e r  w i n d o w s
Linked door lock operationONOFF
Linked door key operationOpen and closeOpen only
Close only
Wireless remote control linked 
operationONOFF
Moon roof
Linked door lock operationONOFF
Linked door key  operationOpen and closeOpen only
Close only
Linked operation of components 
when door key is usedSlide onlyTi l t  o n l y
Wireless remote control linked 
operationONOFF
Linked operation of components 
when wireless remote control 
used
Slide onlyTi l t  o n l y 
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Customizing Your Lexus
ItemFunctionDefault settingCustomized setting
Automatic light 
control system
Light sensor sensitivityLevel 3Level 1 to 5
Time elapsed before headlights 
automatically turn off after 
doors are closed
30 seconds
0 seconds
60 seconds
90 seconds
Windshield 
wipers and 
washer
Switching operation when the 
vehicle is stationalyONOFF
Drip prevention functionONOFF
Time elapsed before the drip 
prevention function operates
Va r i a b l e  
depending on  the vehicle  speed
3 seconds
Intuitive parking 
assist
Back sensor operation display 
and buzzerONOFF
Buzzer volumeLevel 3Level 1 to 5
Distance which a sensor detects4.5 ft. (150 cm)1.8 ft. (60 cm)
Illumination
Time elapsed before lights turn 
off15 seconds7. 5  s e c o n d s
30 seconds
Operation when the doors are 
unlockedONOFF
Operation after the “ENGINE 
START STOP” switch turned 
OFF
ONOFF
Front foot well lightingONOFF
Shift lever lightingONOFF
Outer foot lightONOFF 
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Memo 
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Memo
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