alarm Lexus IS250 2012 User Guide

92
1-6. Theft deterrent system
IS350/250_U
Alarm
The system sounds the alarm and flashes the lights when forcible 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 door lock function
or mechanical key.
● The hood is opened.
■ Setting the alarm system
Close the doors, trunk and
hood, and lock all doors.
The system will be set automati-
cally after 30 seconds.
The indicator light changes from
being on to flashing when the
system is set.
■Deactivating or stopping the alarm
Do one of the following to deactivate or stop the alarm.
● Unlock the doors or trunk.
● Turn the “ENGINE START STOP” switch to ACCESSORY or
IGNITION ON mode or start the engine by pressing the
“ENGINE START STOP” switch. (The alarm will be deactivated
or stopped after a few seconds.)

93
1-6. Theft deterrent system
1
Before driving
IS350/250_U
■System maintenance
The vehicle has a maintenance-free type alarm system.
■Points to remember before locking the doors
To prevent unexpected triggering of the alarm, make sure to check the following
before locking the doors:
●Nobody is in the vehicle.
●The windows and moon roof are closed before the alarm is set.
●The alarm system does not guarantee absolute security. To help prevent theft,
make sure to check that no valuables and so forth are left in the vehicle.
■Unexpected triggering of the alarm
In the following situations, perform an operation that will deactivate or stop the
alarm (→P. 9 2 )
■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.
●When someone without a key is left in the
vehicle and the doors are locked.
When a door, the trunk or hood is opened
from inside the vehicle, the alarm may be
triggered.
●When the battery is recharged or
replaced, due to battery discharge and so
forth, after locking the doors.
The alarm may be activated when the hood
is opened and the battery is reconnected
after the mechanical key has been used to
unlock the doors.

94
1-6. Theft deterrent system
IS350/250_U
■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 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.

5
When trouble arises
507
5-2. Steps to take in an emergency
IS350/250_U
Changing “ENGINE START STOP” switch modes and starting the engine
Automatic transmissionShift the shift lever to P and apply the brakes.
Touch the Lexus emblem side of
the electronic key to the
“ENGINE START STOP” switch.
An alarm will sound to indicate that
the start function cannot detect the
electronic key that is touched to
the “ENGINE START STOP”
switch if any of the doors is opened
and closed while the key is touched
to the switch.
To change “ENGINE START STOP” switch modes: Within 10
seconds of the buzzer sounding, release the brake pedal and
press the “ENGINE START STOP” switch. Modes can be
changed each time the switch is pressed.
(→P. 141)
To start the engine: Press the “ENGINE START STOP” switch
within 10 seconds after the buzzer sounds, keeping the brake
pedal depressed.
STEP1
STEP2
STEP3

508
5-2. Steps to take in an emergency
IS350/250_UManual transmission
Shift the shift lever to N and depress the clutch pedal.
Touch the Lexus emblem side of
the electronic key to the
“ENGINE START STOP” switch.
An alarm will sound to indicate that
the start function cannot detect the
electronic key that is touched to
the “ENGINE START STOP”
switch if any of the doors is opened
and closed while the key is touched
to the switch.
To change “ENGINE START ST OP” switch modes: Within 10
seconds of the buzzer sounding, release the clutch pedal and
press the “ENGINE START STOP” switch. Modes can be
changed each time the switch is pressed.
(→ P. 141)
To start the engine: Press the “ENGINE START STOP” switch
within 10 seconds after the buzzer sounds, keeping the clutch
pedal depressed.
In the event that the engine still cannot be started, contact your Lexus
dealer.
STEP1
STEP2
STEP3

578
IS350/250_U
Alphabetical index
Alphabetical index
A/C* ........................................................... 216
ABS.............................................................. 196
Air conditioning filter ..........................430
Air conditioning systemAir conditioning filter .......................430
Automatic air conditioning system*.................................................. 216
Airbags
Airbag operating conditions........... 101
Airbag precautions for your child........................................................ 104
Airbag warning light .........................472
Curtain shield airbag operating conditions.............................................. 101
Curtain shield airbag precautions ........................................ 104
Front passenger occupant classification system....................... 109
General airbag pr ecautions ......... 104
Locations of airbags............................ 98
Modification and disposal of airbags .................................................. 108
Proper driving posture ........... 96, 104
Side airbag operating conditions.............................................. 101
Side airbag precautions .................. 104
SRS airbags ............................................. 98
Alarm ............................................................ 92
Antenna* .................................................. 234 Anti-lock brake system ........................196
Armrest ..................................................... 351
Ashtrays.................................................... 342
Audio input* ............................................. 271
Audio system*
Antenna...................................................234
AUX port .................................................271
Bluetooth
® audio ..............................276
CD player/changer .......................... 237
iPod ...........................................................252
MP3/WMA disc................................244
Optimal use ......................................... 269
Portable music player ........................271
Radio ........................................................229
Steering wheel audio switch.........273
USB memory ...................................... 260
USB port ............................................... 260
Automatic air conditioning
system* ....................................................216
Automatic headlight leveling
system ......................................................175
Automatic light control system......... 172
Automatic transmission Automatic transmission ................... 146
If the shift lever cannot be shifted from P................................... 503
S mode ..................................................... 149
AUX port* ................................................ 271
Auxiliary box .......................................... 335
A

586
Alphabetical index
IS350/250_U
Smart access system with push-button start
Entry function.......................................... 33
Starting the engine ................................141
Spare tire Inflation pressure................................ 424
Storage location ................................. 492
Spark plug ................................................ 527
Specifications .........................................520
Speedometer
Speed indicator ................................... 158
Speedometer........................................ 158
Steering wheel Audio switches* ................................. 273
Manual adjustment ............................... 72
Power adjustment .................................73
Steering wheel positionmemory.................................................. 58
Storage feature ......................................329
Stuck If your vehicle becomes stuck...... 516
Sun visors .................................................336
Sunshade Rear .......................................................... 352
Roof ............................................................. 84 Switch
ECT switch ............................................. 147
Emergency flasher switch..............462
Engine switch .......................................... 141
ETCS switch .......................................... 153
Fog light switch .................................... 176
Hazard light switch ...........................462
Ignition switch ......................................... 141
Light switches.........................................172
Power door lock switch.................... 48
Power window switch ....................... 80
Satellite switches................................ 339
Transmission shift switches ............ 149
Window lock switch ........................... 80
Wiper and washer switch............... 178
Tachometer Tacho indicator ....................................158
Tachometer............................................158
Tail lights
Switch.........................................................172
Talk switch* ............................................. 299
Telephone switch* ............................... 298
Theft deterrent system
Alarm........................................................... 92
Engine immobilizer system ............. 90
Theft prevention labels.......................... 95
Tire inflation pressure ......................... 424
T

590
IS350/250_U
What to do if...
What to do if...
A tire puncturesP. 4 9 2If you have a flat tire
The engine does not start
P. 5 0 1If the engine will not start
P. 9 0Engine immobilizer system
P. 5 1 0If the vehicle battery is discharged
The shift lever cannot be
moved out of PP. 5 0 3If the shift lever cannot be shifted
from P
The engine coolant temperature
gauge enters the red zone
Steam can be seen coming
from under the hood
P. 5 1 3If your vehicle overheats
The key is lostP. 5 0 4If you lose your keys
The battery runs outP. 5 1 0If the vehicle battery is discharged
The doors cannot be lockedP. 4 8Doors
The horn begins to soundP. 9 2Alarm
The vehicle is stuck in mud or
sandP. 5 1 6If the vehicle becomes stuck