2012 Lexus HS250h alarm

103
1
1-7. Theft deterrent system
Before driving
HS250h_U_75050U
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 when the alarm is
set:
● A locked door or trunk is unlocked or opened in any way other
than using the entry function, wireless remote control or mechan-
ical key. (The doors will lock again automatically.)
● The hood is opened.
■ Setting the alarm system
Without navigation system
Close the doors, trunk and
hood, and lock all the doors
using the entry function or wire-
less 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 systemClose the doors, trunk and
hood, and lock all the doors
using the entry function or wire-
less 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.

104
1-7. Theft deterrent system
HS250h_U_75050U
■System maintenance
The vehicle has a maintenance-free type alarm system.
■Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of the
following:
●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.
■Deactivating or stopping the alarm
Do one of the following to de activate or stop the alarms:
● Unlock the doors or trunk.
● Turn the “POWER” switch to ACCESSORY or ON mode, or
start the hybrid system. (The alarm will be deactivated or stopped
after a few seconds.)

105
1-7. Theft deterrent system
1
Before driving
HS250h_U_75050U
■Triggering of the alarm
The alarm may be triggered in the following situations:
(Stopping the alarm deactivates the alarm system.)
■When the 12-volt battery is disconnected
Be sure to cancel the alarm system.
If the 12-volt battery is disconnected before canceling the alarm, the system may be
triggered when the battery is reconnected.
■Alarm-operated door lock
●When the alarm is operating, the doors 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 12-volt
battery.
NOTICE
■To ensure the system operates correctly
Do not modify or remove the system. If modified or removed, the proper operation
of the system cannot be guaranteed.
●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.

251
2-4. Using other driving systems
2
When driving
HS250h_U_75050U
CAUTION
■Limitations of the pre-collision system
Do not overly rely on the pre-collision system. Always drive safely, taking care to
observe your surroundings and checking for any obstacles or other road hazards.
Failure to do so may cause an accident resulting in death or serious injury.
■Cautions regarding the assist contents of the system
By means of alarms and brake control, the pre-collision system is intended to assist
the driver in avoiding collisions through the process of LOOK-JUDGE-ACT. There
are limits to the degree of assistance the system can provide, so please keep in mind
the following important points.
●Assisting the driver in watching the road
The pre-collision system is only able to detect obstacles directly in front of the
vehicle, and only within a limited range. It is not a mechanism that allows careless
or inattentive driving, and it is not a system that can assist the driver in low-visibil-
ity conditions. It is still necessary for the driver to pay close attention to the vehi-
cle’s surroundings.
●Assisting the driver in making correct judgment
When attempting to estimate the possibility of a frontal collision, the only data
available to the pre-collision system is that from obstacles it has detected directly
in front of the vehicle. Therefore, it is absolutely necessary for the driver to remain
vigilant and to determine whether or not there is a possibility of collision in any
given situation.
●Assisting the driver in taking action
The pre-collision system’s braking assist feature is designed to help reduce the
severity of a collision, and so only acts when the system has judged that a collision
is unavoidable. This system by itself is not capable of automatically avoiding a col-
lision or bringing the vehicle to a stop safely. For this reason, when encountering a
dangerous situation the driver must take direct and immediate action in order to
ensure the safety of all involved.

5
When trouble arises
545
5-2. Steps to take in an emergency
HS250h_U_75050UTr u n k
Turn 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 electronic 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.

614
HS250h_U_75050U
Alphabetical index
Alphabetical index
A/C*Air conditioning filter ....................... 464
Automatic air conditioning system .................................................. 266
ABS.............................................................238
AFS .............................................................. 193
Adaptive front lighting system ......... 193
Air conditioning filter .......................... 464
Air conditioning system* Air conditioning filter ....................... 464
Automatic air conditioning system .................................................. 266
Airbags Airbag operating
conditions...............................................112
Airbag precautions for your
child.......................................................... 116
Airbag warning light ........................503
Curtain shield airbag operating conditions...............................................113
Curtain shield airbag precautions .......................................... 116
Front passenger occupant classification system..........................121
General airbag pr ecautions ........... 116
Locations of airbags.......................... 109
Modification and disposal of airbags ...................................................120
Proper driving posture ............ 107, 116
Side airbag operating conditions...............................................113
Side airbag precautions .................... 116
Side and curtain shield airbags operating conditions ........................113
Side and curtain shield airbags precautions .......................................... 116
SRS airbags ........................................... 109 Alarm.......................................................... 103
Antenna .................................................... 284
Anti-lock brake system ...................... 238
Armrest ......................................................391
Audio input* .............................................321
Audio remote control switches*
Audio system*
Antenna.................................................. 284
Audio input............................................. 321
Audio visual input................................ 321
AUX port ................................................ 321
CD player ..............................................287
CD player/changer ..........................287
iPod .......................................................... 302
MP3/WMA disc............................... 295
Optimal use ........................................... 318
Portable music player ....................... 321
Radio ........................................................279
Steering wheel audio switch......... 322
USB memory ........................................ 310
Audio/video system*
Audio visual input* .................................321
Automatic air conditioning system* Air conditioning filter ....................... 464
Air conditioning system ................. 266
Automatic air conditioning
system.................................................. 266
Automatic headlight leveling
system ..................................................... 195
Automatic light control system.......... 191
AUX port* ................................................321
Auxiliary box .......................................... 384A

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Alphabetical index
HS250h_U_75050U
Fog light switch................................... 202
Ignition switch........................................152
Light switches ......................................... 191
Mode select switch............................. 162
Power door lock switch ...................... 61
Power switch ......................................... 152
Power window switch ........................ 90
Talk switch................................328, 347
Telephone switch .............................. 347
Tire pressure warning reset switch ................................................... 453
Window lock switch ........................... 90
Wiper and washer switch ............. 204
Tail lights Replacing light bulbs..........................491
Switch ......................................................... 191
Wattage................................................. 568
Talk switch* ................................. 328, 347
Telephone switch*................................ 347
Theft deterrent system Alarm ........................................................ 103
Immobilizer system.............................. 101
Theft prevention labels ........................ 106
TILT switch*
Tire inflation pressure .........................459
Tire information Glossary.................................................578
Size ........................................................... 575
Tire identification number ............. 574
Uniform Tire Quality Grading.... 576
Tires
Chains ..................................................... 259
Checking .................................................451
Compact spare tire .......................... 532
If you have a flat tire .......................... 532 Inflation pressure ............................... 459
Inflation pressure sensor ............... 452
Information ............................................572
Replacing .............................................. 532
Rotating tires.......................................... 451
Size ........................................................... 567
Snow tires.............................................. 258
Spare tire ............................................... 532
Tire pressure warning
system....................................... 451, 505
Tools........................................................... 532
Total load capacity ............................... 257
Towing Dinghy towing .....................................262
Emergency towing ........................... 495
Trailer towing ........................................ 261
TRAC ........................................................ 238
Traction control..................................... 238
Trailer towing ...........................................261
Trip meter ..................................................169
Trunk Opener ......................................................64
Turn signal lights Replacing light bulbs ......................... 481
Switch ........................................................ 166
Wattage .................................................568
Vanity lights Vanity lights.......................................... 386
Wattage .................................................568
Vanity mirrors ........................................ 386
Vehicle identification number ......... 560
Vehicle stability control ..................... 238
Ventilators ...............................................389
VIEW button*
VSC ........................................................... 238
T
V

625
HS250h_U_75050U
What to do if...
What to do if...
A tire puncturesP. 5 3 2If you have a flat tire
The hybrid system does not start
P. 5 4 1If the hybrid system will not start
P. 1 0 1Immobilizer system
P. 5 4 7If 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. 552If your vehicle overheats
The key is lostP. 5 4 3If you lose your keys
The 12-volt battery runs outP. 5 4 7If the vehicle 12-volt battery is dis-
charged
The doors cannot be locked
P. 4 7Smart access system with push-button start
P. 5 8Wireless remote control
P. 6 1Doors
The horn begins to soundP. 1 0 3Alarm
The vehicle is stuck in mud or
sandP. 556If the vehicle becomes stuck
A warning light or indicator
light comes onP. 5 0 2If a warning light turns on or a warning
buzzer sounds...