2012 Lexus IS F key battery

486
5-2. Steps to take in an emergency
*: If the engine does not start when the electronic key is inside the vehicle, theelectronic key battery may be depleted or there may be difficulties receiving the
signal from the key. ( P. 3 6 )
OnceIndicates that the
electronic key
does not operate
properly.
P. 5 0 0
Once
Interior
buzzerExterior buzzerWa r n i n g m e s s a g eDetailsCorrection
procedure

5
When trouble arises
499
5-2. Steps to take in an emergency
If the electronic key does not operate properly
Locking and unlocking the doors, unlocking the trunk and key linked functions
Use the mechanical key built in to the electronic keys to operate the
doors. (P. 2 9 )
Doors Remove the cover on the driver’s
door handle.
Locks all the doors
Closes the windows/moon roof
(turn and hold)
Unlocks the door
Turning the key rearward unlocks
the driver's door. Turning the key
once again unlocks the other
doors.
Opens the windows/moon roof
(turn and hold)
If communication between the electron ic key and vehicle is interrupted
(  P. 36) or the electronic key cannot be used because the battery is
depleted, the smart access system with push-button start and wireless
remote control cannot be used. In su ch cases, the doors and trunk can be
opened or the engine can be started by following the procedure below.
STEP1
STEP2

5
When trouble arises
501
5-2. Steps to take in an emergency
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. 1 3 4 )
To start the engine: Press th e “ENGINE START STOP” switch
within 10 seconds after the buzz er sounds, keeping the brake
pedal depressed.
In the event that the engine still cannot be started, contact your Lexus
dealer.
STEP2
■Stopping the engine
Shift the shift lever to P and press the “ENGINE START STOP” switch as you nor-
mally do when stopping the engine.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the elec-
tronic key battery be replaced immediately when the battery depletes.
(  P. 4 2 9 )
STEP3

563
Alphabetical index
BrakeFluid .......................................................... 404
Parking brake ........................................148
Brake assist ............................................... 197
Care Exterior ................................................... 378
Interior.......................................................381
Seat belts ............................................... 382
Cargo capacity ....................................... 210
Cargo hooks .......................................... 356
CD changer* ........................................... 241
CD player* ............................................... 241
Chains ......................................................... 214
Child restraint system Booster seats, definition.......................111
Booster seats, installation .................. 117
Convertible seats, definition ..............111
Convertible seats, installation ......... 117
Front passenger occupant classification system .......................106
Infant seats, definition ............................111
Infant seats, installation........................ 117
Installing CRS with lower anchorages ...........................................116
Installing CRS with seat belts .......... 117
Installing CRS with top straps ......... 121
Child safety Airbag precautions ............................. 101
Battery precautions ............. 408, 504
Child restraint system ...........................111
Child-protectors.................................... 47
How your child should wear the seat belt...........................................67 Installing child restraints..................... 115
Moon roof precautions...................... 82
Power window lock switch .............. 76
Power window precautions ............ 78
Removed electronic key battery
precautions....................................... 430
Seat belt comfort guide .....................65
Seat belt extender precautions......69
Seat belt precautions ..........................68
Seat heater precautions................. 350
Trunk precautions................................. 52
Child-protectors ...................................... 47
Cigarette lighter.................................... 347
Cleaning Exterior....................................................378
Interior ...................................................... 381
Seat belts ................................................382
Clock ......................................................... 342
Coat hooks ..............................................354
Compass ..................................................365
Condenser ..............................................404
Console box ...........................................335
Cooling system Engine overheating.......................... 505
Cornering assist sensors ......................191
Cruise control Cruise control........................................173
Dynamic radar cruise control........ 177
Cup holders ............................................ 337
Curtain shield airbags............................ 94
Customizable features ...................... 538
C
*: For vehicles with a navigation system, refe r to the “Navigation System Owner’s Manual”.

564
Alphabetical index
Daytime running light system ........... 164
Defogger*Rear window ........................................ 228
Side mirrors .......................................... 228
Dimension ................................................. 512
Dinghy towing ..........................................217
Display Dynamic radar cruise control ....... 177
Satellite switch mode ....................... 343
Trip information ................................... 158
Warning message............................. 473
Do-it-yourself maintenance ............ 390
Door courtesy lights Door courtesy lights.........................330
Wattage.................................................. 522
Door pockets..........................................339
Doors Door lock................................. 32, 43, 46
Door windows ....................................... 76
Side mirrors ..............................................74
Driver's seat belt reminder light ..... 466
Driving Correct posture .................................... 92
Procedures ............................................. 126
Driving position memory ......................55
Electric power steering ....................... 197
Electronic key If the electronic key does not operate properly ............................ 499
Emergency flashers Switch ...................................................... 454
Emergency, in case of If a warning message is displayed ............................................ 473 If the electronic key does not
operate properly............................ 499
If the engine will not start ............... 496
If the shift lever cannot be shifted from P....................................497
If the vehicle has a discharged battery ................................................. 502
If the warning buzzer sounds...... 463
If the warning light turns on.......... 463
If you have a flat tire ........................ 487
If you lose your keys ........................ 498
If you think something is wrong .................................................... 461
If your vehicle becomes stuck ....508
If your vehicle has to be stopped in an emergency ......... 509
If your vehicle needs to be towed ................................................... 455
If your vehicle overheats................505
Engine ACCESSORY mode....................... 134
Compartment ..................................... 396
Engine switch ........................................ 134
Hood ....................................................... 393
How to start the engine ................... 134
Identification number ........................ 513
If the engine will not start ............... 496
Ignition switch ....................................... 134
Overheating ........................................505
Engine compartment cover ............. 397
Engine coolant Capacity .................................................. 517
Checking............................................... 402
Preparing and checking before winter...................................... 214D
E

568
Alphabetical index
Radar cruise control .............................. 177
Radiator ....................................................404
Radio* ........................................................233
RDS* ..........................................................235
Rear turn signal lightsReplacing light bulbs........................ 447
Wattage.................................................. 522
Rear view mirror Compass ...............................................365
Rear window defogger* ....................228
Replacing Electronic key battery...................... 429
Fuses .......................................................... 431
Light bulbs............................................. 447
Reporting safety defects for U.S. owners ..........................................546
Safety connect .......................................369
Seat belts Adjusting the seat belt........................ 65
Automatic locking retractor............ 66
Child restraint system installation ............................................. 115
Cleaning and maintaining the seat belts ..................................... 382
Emergency locking retractor ......... 66
How to wear your seat belt............. 64
How your child should wear the seat belt .......................................... 67
Pregnant women, proper seat belt use......................... 66
Reminder light ..................................... 466
Seat belt extenders .............................. 67
Seat belt pretensioners ...................... 65 Seat heaters ............................................ 349
Seat position memory............................ 59
Seating capacity......................................213
Seats
Adjustment ...............................................54
Adjustment precautions ....................54
Child seats/child restraint system installation..............................115
Cleaning .................................................. 381
Driver’s seat position memory ...... 55
Front passenger seat position memory ................................................. 59
Head restraints ........................................ 61
Properly sitting in the seat................. 92
Seat heaters ......................................... 349
Service reminder indicators .............154
Shift lever If the shift lever cannot be shifted from P....................................497
Transmission.......................................... 138
Shift lever light ....................................... 330
Shift lock system.................................... 497
Shopping bag hooks ........................... 356
Side airbags ............................................... 94
Side marker lights Switch ........................................................ 162
Side mirrors Adjusting and folding .......................... 74
Mirror position memory ................... 55
Smart access system with push-button startEntry function .......................................... 32
Starting the engine.............................. 134
“SOS” button.......................................... 369R
S

572
Alphabetical index
WeightCargo capacity.....................................210
Load limits ............................................... 213
Weight ......................................................512
Wheels ...................................................... 424
Window glasses ...................................... 76
Window lock switch ............................... 76
Windows Power windows..................................... 76
Rear window defogger .................. 228
Washer .................................................... 168
Windshield wipers................................. 168
Windshield wiper de-icer.................. 229
Wireless remote control key Replacing the battery ...................... 429
WMA disc* .............................................248
*: For vehicles with a navigation system, refe r to the “Navigation System Owner’s Manual”.

573
What to do if...
What to do if...
A tire puncturesP. 4 8 7If you have a flat tire
The engine does not start
P. 4 9 6If the engine will not start
P. 8 6Engine immobilizer system
P. 5 0 2If the vehicle battery is discharged
The shift lever cannot be
moved out of PP. 4 9 7If the shift lever cannot be shifted
from P
The display on the engine cool-
ant temperature gauge flashes
Steam can be seen coming
from under the hood
P. 5 0 5If your vehicle overheats
The key is lostP. 4 9 8If you lose your keys
The battery runs outP. 5 0 2If the vehicle battery is discharged
The doors cannot be lockedP. 4 6Doors
The horn begins to soundP. 8 8Alarm
The vehicle is stuck in mud or
sandP. 5 0 8If the vehicle becomes stuck