2010 Lexus HS250h alarm

98
1-7. Theft deterrent system
Alarm
The system sounds the alarm and flashes the lights when forced entry is
detected.
■Triggering of the alarm
The alarm is triggered in the following situations:
●A lock
ed door or trunk is unlocked or opened in any way other
than using the entry function, wi reless remote control or mechan -
ical key with the alarm being set. (The doors will lock again au
to-
matically.)
● The hood is opened with the alarm being set.
■ Setting the alarm sy
stem
Without navigation system
Close the doors, trunk and hood,
and lock all the doors using the
entry function or wireless remote
control. The system will be set
automatically after 30 seconds.
The indicator light changes from
being on to flashing
when the
system is set.
With navigation system
Close the doors, trunk and hood,
and lock all the doors using the
entry function or wireless remote
control. The system will be set
automatically after 30 seconds.
The indicator light changes from
being on to flashing
when the
system is set.

99
1-7. Theft deterrent system
1
Before driving
■Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of the
fo
llowing:
●Nobody is in the vehicle.
●The windows and moon roof are closed before the alarm is set.
●No valuables or other personal items are left in the vehicle.
■Tr i g g e r i n g o f t h e a l a r m
The alarm may be triggered in the
following situations:
(Stopping the alarm deactivates the alarm system.)
■ Deactivating or stopping the alarm
Do one of the following to deactivate or stop the alarms:
●U
nlock the doors or trunk using the entry function, wireless
remote control or mechanical key.
● Star
t the hybrid system. (The alarm will be deactivated or stopped
after a few seconds.)
●A person inside the vehicle opens a door,
the trunk or hood.
●The 12-volt battery is recharged or
replaced when the vehicle is locked.

534
5-2. Steps to take in an emergency
Tr u n kTurn the mechanical key clock-
wise to open.
Changing “POWER” switch modes and starting the hybrid system
Depress the brake pedal.
Touch the Lexus emblem side of
the electr
onic key to the
“POWER” switch.
If any of the doors is opened or
closed while the key is being
touched to the switch, an alarm will
sound to indicate that the start
function cannot detect the elec -
tronic key.

592
Alphabetical index
Alphabetical index
A/CAir conditioning filter .......................450
Automatic air conditioning 
system .................................................. 252
ABS............................................................. 225
AFS .............................................................. 185
Adaptive front lighting system ......... 185
Air conditioning filter ......................... 450
Air conditioning system Air conditioning filter .......................450
Automatic air conditioning 
system .................................................. 252
Airbags Airbag operating 
conditions.................................. 106, 107
Airbag precautions for your 
child.......................................................... 110
Airbag warning light ........................ 493
Curtain shield airbag operating 
conditions.............................................107
Curtain shield airbag 
precautions .......................................... 110
Front passenger occupant 
classification system......................... 115
General airbag precautions ........... 110
Locations of airbags.......................... 103
Modification and disposal of 
airbags .....................................................114
Proper driving po sture ............. 101, 110
Side airbag operating 
conditions.............................................107
Side airbag precautions .................... 110
Side and curtain shield airbags 
operating conditions ......................107
Side and curtain shield airbags 
precautions .......................................... 110
SRS airbags ........................................... 103 Alarm ............................................................ 98
Antenna .................................................... 270
Anti-lock brake system ...................... 225
Armrest .....................................................377
Audio input.............................................. 307
Audio system
Antenna...................................................270
Audio input ........................................... 307
Audio visual input.............................. 307
AUX adapter ...................................... 307
CD player .............................................. 273
CD player/changer .......................... 273
MP3/WMA disc................................. 281
Optimal use ......................................... 304
Portable music player ..................... 307
Radio ....................................................... 265
Steering wheel audio switch........308
Audio visual input ................................. 307
Automatic air conditioning system Air conditioning filter ....................... 450
Air conditioning system ..................252
Automatic air conditioning 
system...................................................252
Automatic headlight leveling 
system ......................................................187
Automatic light control system........ 183
AUX adapter ......................................... 307
Auxiliary box .......................................... 370A

601
Alphabetical index
Steering wheelAdjustment ...............................................79
Audio switches ...................................308
Manual adjustment ...............................79
Power adjustment .................................79
Steering wheel position 
memory ................................................. 68
Stop light Replacing light bulbs ....................... 479
Wattage ................................................. 556
Storage feature ..................................... 363
Stuck If the vehicle becomes stuck ....... 545
Sun visors................................................... 371
Sunshade Rear .......................................................... 378
Roof ............................................................. 89
Switch Driving mode selector 
switch .................................................... 158
Engine switch ........................................ 147
Fog light switch..................................... 194
Ignition switch........................................ 147
Light switches........................................183
Mode select switch ........................... 158
Power door lock switch .....................57
Power switch ......................................... 147
Power window switch........................ 86
Tire pressure warning reset 
switch ................................................... 439
Window lock switch ........................... 86
Wiper and washer ..............................195 Tail lights
Replacing light bulbs ........................ 479
Switch........................................................ 183
Wattage ................................................. 556
Talk switch .....................................314, 333
Telephone switch ..................................333
Theft deterrent system Alarm...........................................................98
Immobilizer system ..............................96
Theft prevention labels ........................ 100
Tire inflation pressure ......................... 445
Tire information Glossary ................................................ 566
Size ........................................................... 563
Tire identification number..............562
Uniform Tire Quality Grading ... 564
Tires Chains .....................................................245
Checking ............................................... 437
Compact spare tire ........................... 521
If you have a flat tire ........................... 521
Inflation pressure ................................445
Inflation pressure sensor ............... 438
Information ........................................... 560
Replacing ................................................ 521
Rotating tires ........................................ 437
Size ........................................................... 555
Snow tires .............................................. 244
Spare tire ................................................. 521
Tire pressure warning 
system ......................................437, 495
Tools ............................................................ 521
Total load capacity ............................... 243T

604
What to do if...
What to do if...
A tire puncturesP. 5 2 1If you have a flat tire
The hybrid system does not start
P. 5 3 0If the hybrid system will not start
P. 9 6Immobilizer system
P. 5 3 6If the vehicle 12-volt battery is dis-
charged
The engine coolant temperature
warning light flashes or come on
Steam can be seen coming 
from under the hood
P. 5 4 1If your vehicle overheats
The key is lostP. 5 3 2If you lose your keys
The 12-volt battery runs outP. 5 3 6If the vehicle 12-volt battery is dis-
charged
The doors cannot be lockedP. 5 7Doors
The horn begins to soundP. 9 8Alarm
The vehicle is stuck in mud or
sandP. 5 4 5If the vehicle becomes stuck
A warning light or indicator
light comes onP. 4 9 2If a warning light turns on or a warning
buzzer sounds...