alarm Lexus IS250 2011 Opening, Closing And Locking The Doors And Trunk / LEXUS 2011 IS250/IS350 (OM53839U) User Guide

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1
1-6. Theft deterrent system
Before driving
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, wi reless 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. (The alarm will be
deactivated or stopped after a few seconds.)

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1-6. Theft deterrent system
■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.
■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.)
■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.
●A person inside the vehicle opens a door,
the trunk or hood.
●The battery is recharged or replaced when
the vehicle is locked.

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1-6. Theft deterrent system
1
Before driving
■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 mo dified or removed, the proper operation
of the system cannot be guaranteed.

5
When trouble arises
495
5-2. Steps to take in an emergency
Tr u n kTurn the mechanical key clock-
wise to open.
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.
STEP1
STEP2

496
5-2. Steps to take in an emergency
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. 1 3 4 )
To start the engine: Press the “ENGINE START STOP” switch
within 10 seconds after the buzz er sounds, keeping the brake
pedal depressed.
Manual 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.
STEP3
STEP1
STEP2

564
Alphabetical index
Alphabetical index
A/C ............................................................206
ABS.............................................................. 185
Air conditioning filter ........................... 418
Air conditioning systemAir conditioning filter ........................ 418
Automatic air conditioning system ..................................................206
Airbags Airbag operating conditions........... 96
Airbag precautions for your child.......................................................... 99
Airbag warning light ........................ 462
Curtain shield airbag operating conditions.............................................. 96
Curtain shield airbag
precautions .......................................... 99
Front passenger occupant classification system....................... 104
General airbag precautions ........... 99
Locations of airbags............................ 93
Modification and disposal of airbags .................................................. 103
Proper driving po sture ............... 91, 99
Side airbag operating conditions.............................................. 96
Side airbag precautions .................... 99
SRS airbags ............................................. 93
Alarm ............................................................ 87
Antenna .................................................... 224
Anti-lock brake system ....................... 185
Armrest ...................................................... 341
Ashtrays ....................................................332
Audio input ............................................... 261 Audio system
Antenna................................................... 224
AUX port ................................................ 261
Bluetooth
® audio ............................. 266
CD player/changer .......................... 227
iPod ........................................................... 242
MP3/WMA disc................................234
Optimal use ......................................... 259
Portable music player ....................... 261
Radio ......................................................... 219
Steering wheel audio switch.........263
USB memory ...................................... 250
USB port ............................................... 250
Automatic air conditioning system .................................................... 206
Automatic headlight leveling system ...................................................... 167
Automatic light control system.........165
Automatic transmission Automatic transmission ................... 139
If the shift lever cannot be shifted from P....................................492
S mode ..................................................... 142
AUX port...................................................261
Auxiliary box .......................................... 325
Back-up lights Wattage ................................................. 524
Battery Checking............................................... 396
If the vehicle has a discharged battery ................................................. 498
Preparing and checking before winter...................................... 195
Bottle holders......................................... 324
Bluetooth
® audio ................................. 266
A
B

572
Alphabetical index
TachometerTacho indicator...................................... 151
Tachometer ............................................. 151
Tail lights Switch ....................................................... 165
Talk switch ...............................................289
Telephone switch ................................. 288
Theft deterrent system Alarm .......................................................... 87
Engine immobilizer system ............. 85
Theft prevention labels ..........................90
Tire inflation pressure .......................... 412
Tire information Glossary................................................. 533
Size ...........................................................530
Tire identification number .............530
Uniform tire quality grading ...........531
Tires Chains ...................................................... 195
Checking .............................................. 400
If you have a flat tire ........................... 481
Inflation pressure.................................. 412
Inflation pressure sensor................ 402
Information............................................528
Replacing ................................................ 481
Rotating tires ....................................... 400
Size ............................................................ 519
Snow tires ............................................... 195
Tools ............................................................ 481
Total load capacity ................................ 194 Towing
Dinghy towing ......................... 200, 201
Emergency towing ............................. 451
Trailer towing ........................................ 199
TRAC ......................................................... 185
Traction control...................................... 185
Transmission shift switches.................142
Trip meter ................................................... 151
Trunk Extending trunk space.....................344
Opener ...................................................... 47
Trunk light Trunk light ................................................ 48
Wattage ................................................. 524
Turn signal lights Replacing light bulbs ....................... 439
Switch ........................................................ 147
Wattage ................................................. 524
USB port ...................................................... 250
Vanity lights Vanity lights........................................... 327
Wattage ................................................. 524
Vanity mirrors ........................................ 327
VDIM.......................................................... 185
Vehicle dynamics integrated management ........................................ 185
Vehicle identification number.........509
Vehicle stability control ...................... 185
Ventilators ............................................... 338
Voice command switch .....................288
VSC ............................................................ 185T
U
V

574
What to do if...
What to do if...
A tire puncturesP. 4 8 1If you have a flat tire
The engine does not start
P. 4 9 0If the engine will not start
P. 8 5Engine immobilizer system
P. 4 9 8If the vehicle battery is discharged
The shift lever cannot be
moved out of PP. 4 9 2If 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 0 1If your vehicle overheats
The key is lostP. 4 9 3If you lose your keys
The battery runs outP. 4 9 8If the vehicle battery is discharged
The doors cannot be lockedP. 4 3Doors
The horn begins to soundP. 8 7Alarm
The vehicle is stuck in mud or
sandP. 5 0 4If the vehicle becomes stuck