
565What to do if... (Troubleshooting)
IS250_EE(OM53C51E)
●The function to prevent the electronic key from being left inside the trunk will
operate and you can open the trunk as usual. Take the key out from the trunk.
(→P. 1 2 7 )
●Did you press the engine switch while firmly depressing the brake pedal?
(→P. 1 9 2 )
●Is the shift lever in P? (→P. 1 9 4 )
●Is the electronic key anywhere detectable inside the vehicle? (→P. 1 3 0 )
●Is the steering wheel unlocked? (→P. 1 9 4 )
●Is the electronic key battery weak or depleted?
In this case, the engine can be started in a temporary way. (→P. 5 2 5 )
●Is the battery discharged? (→P. 5 2 7 )
●Is the engine switch in IGNITION ON mode?
If you cannot release the shift lever by depressing the brake pedal with the
engine switch in IGNITION ON mode. (→P. 5 2 3 )
●It is locked automatically to prevent theft of the vehicle. (→P. 1 9 4 ) The trunk lid is closed with the electronic key left inside
If you think something is wrong
The engine does not start
The shift lever cannot be shifted from P even if you depress the brake
pedal
The steering wheel cannot be turned after the engine is stopped

566What to do if... (Troubleshooting)
IS250_EE(OM53C51E)
●Is the window lock switch pressed?
The power window except for the one at the driver’s seat cannot be operated
if the window lock switch is pressed. (→P. 1 6 7 )
●The auto power off function will be operated if the vehicle is left in ACCES-
SORY or IGNITION ON mode (the engine is not running) for a period of
time. (→P. 1 9 4 )
●The seat belt reminder light is flashing
Are the driver and the front passenger wearing the seat belts? (→P. 4 7 8 )
●The parking brake indicator is on
Is the parking brake released? (→P. 2 0 5 )
Depending on the situation, other types of warning buzzer may also sound.
(→P. 4 76 , 4 8 2 )
●Did anyone inside the vehicle open a door or anything move inside the vehicle
during setting the alarm?
The sensor detects them and the alarm sounds. (→P. 8 3 )
To stop the alarm, turn the engine switch to IGNITION ON mode or start the
engine.The windows do not open or close by operating the power window
switches
The engine switch is turned off automatically
A warning buzzer sounds during driving
An alarm is activated and the horn sounds (if equipped)

568
IS250_EE(OM53C51E)Alphabetical index
Alphabetical index
A/C ............................................................ 376
Air conditioning filter........................440
Automatic air conditioning
system .................................................. 376
Blower customization .....................383
AAC disc .................................................. 319
ABS (Anti-lock Brake System) ....... 265
Function ..................................................265
Warning light ....................................... 477
Accent color ............................................ 102
Air conditioning filter ..........................440
Air conditioning system ..................... 376
Air conditioning filter........................440
Automatic air conditioning
system .................................................. 376
Blower customization .....................383Airbags .......................................................... 41
Airbag manual on-off system..........52
Airbag operating conditions ........... 47
Airbag precautions for
your child ...............................................43
Correct driving posture.....................34
Curtain shield airbag operating
conditions .............................................. 47
Curtain shield airbag
precautions .......................................... 45
General airbag precautions ............43
Locations of airbags ............................. 41
Modification and disposal of
airbags.....................................................46
Side airbag operating
conditions .............................................. 47
Side airbag precautions.....................43
Side and curtain shield airbags
operating conditions ........................ 47
Side and curtain shield airbags
precautions ...........................................43
SRS airbags ............................................... 41
SRS warning light .............................. 476
Airbag manual on-off system ............. 52
Alarm ............................................................ 83
Anchor brackets .......................................67
Antennas (smart entry &
start system) ........................................ 130
A

569Alphabetical index
IS250_EE(OM53C51E)
Anti-lock Brake System (ABS) ....... 265
Function ..................................................265
Warning light ....................................... 477
Approach warning ............................... 234
Armrest .................................................... 400
Assist grips ..............................................402
Audio input ............................................... 301
Audio system .......................................... 294
Audio CD player .................................319
Audio input ............................................ 301
AUX port/
USB port ............................................. 301
Bluetooth
® audio .............................. 343
iPod........................................................... 326
Optimal use ......................................... 309
Portable music player...................... 334
Radio .......................................................... 317
Steering wheel audio switch ....... 300
USB memory....................................... 329
Automatic headlight leveling
system .................................................. 208
Warning light ....................................... 477
Automatic High Beam .......................209
Automatic light control system ......206
AUX port .................................................. 301
Average fuel economy..........................101
Average vehicle speed .........................101Back-up light
Replacing light bulb ......................... 456
Wattage ................................................. 548
Battery....................................................... 422
Battery checking................................. 422
If the vehicle has discharged
battery...................................................527
Preparing and checking
before winter.................................... 288
Warning light....................................... 476
Blind Spot Monitor (BSM) .............. 278
Blower customization......................... 383
Bluetooth®
Audio system....................................... 343
Hands-free system
(for cellular phone) ....................... 345
Bottle holders......................................... 393
Brake
Fluid .......................................................... 545
Parking brake ...................................... 205
Warning light....................................... 476
Brake assist ............................................ 265
Break-in tips ............................................. 177
Brightness control
Instrument panel light control ........ 98
BSM (Blind Spot Monitor) ............... 278
B

570Alphabetical index
IS250_EE(OM53C51E)
Card key...................................................... 112
Care ............................................... 404, 408
Aluminum wheels ............................. 405
Exterior....................................................404
Interior .................................................... 408
Seat belts............................................... 409
Cargo hooks ...........................................395
CD player ................................................. 319
Chains .......................................................289
Child restraint system ............................58
Baby seats, definition .......................... 59
Baby seats, installation .......................68
Child seats, definition.......................... 59
Child seats, installation.......................68
Installing CRS with ISOFIX
rigid anchors.......................................... 71
Installing CRS with seat belts..........68
Installing CRS with top strap ...........72
Junior seats, definition ........................ 59
Junior seats, installation ..................... 70
Child safety................................................. 57
Airbag precautions .............................. 43
Battery precautions ............. 425, 530
Child restraint system.........................58
How your child should
wear the seat belt .............................. 38
Installing child restraints .................... 67Moon roof precautions .................... 173
Power window lock switch ............ 167
Power window precautions........... 169
Rear door child-protectors ............ 122
Removed electronic key
battery precautions....................... 444
Seat belt precautions.......................... 40
Seat heater precautions ................. 387
Trunk precautions .............................. 128
Child-protectors .................................... 122
Cleaning....................................... 404, 408
Aluminum wheels.............................. 405
Exterior ................................................... 404
Interior.....................................................408
Seat belts ............................................... 409
Clock ......................................................... 398
Coat hooks.............................................. 402
Condenser ............................................. 422
Console box ........................................... 392
Cooling system ....................................... 421
Engine overheating ............................ 531
Cruise control
Cruise control ......................................225
Dynamic radar cruise control ......229
Cup holders ............................................ 393
Current fuel consumption ................... 101
Curtain shield airbags ............................ 41
Customizable features....................... 552
C

571Alphabetical index
IS250_EE(OM53C51E)
DAB (Digital Audio Broadcast) .......317
Daytime running light system ......... 207
Defogger
Front windshield .................................382
Outside rear view mirrors.............382
Rear window ........................................ 382
Differential ............................................... 545
Digital Audio Broadcast (DAB) .......317
Dimensions............................................. 538
Display
Drive information .................................. 101
Dynamic radar cruise control ..... 229
LDA (Lane Departure Alert)....... 242
Multi-information display ................ 100
Warning message.............................482
Distance ..................................................... 102
Do-it-yourself maintenance .............. 413
Door courtesy lights
Location................................................. 389
Wattage................................................. 548
Door lock
Doors .......................................................... 118
Smart entry & start system ............. 130
Wireless remote control ....................112Doors............................................................ 118
Automatic door locking and
unlocking system ............................. 122
Door glasses.......................................... 167
Door lock ................................................. 118
Open door warning buzzer ............119
Open door warning light .............. 478
Outside rear view mirrors .............. 163
Rear door child-protector ............. 122
Drive information .................................... 101
Drive info 1/Drive info 2 ......................102
Driver’s and front passenger’s
seat belt reminder light .................. 478
Driver’s seat position memory ........... 151
Driving ........................................................ 176
Break-in tips............................................177
Correct driving posture.....................34
Driving mode select switch.......... 263
Procedures............................................. 176
Winter drive tips ................................ 288
Dynamic radar cruise control ......... 229
D

576Alphabetical index
IS250_EE(OM53C51E)
Lane Departure Alert (LDA)............ 241
Language
(multi-information display) ............. 102
LDA (Lane Departure Alert)............ 241
Lever
Auxiliary catch lever ...........................415
Hood lock release lever...................415
Shift lever..................................................197
Tilt and telescopic steering
lock release lever ............................ 159
Turn signal lever .................................203
Wiper lever.............................................215
Lexus Display Audio system ............ 294
Lexus Display Audio controller ...... 296
Lexus parking assist-sensor ............. 247
License plate lights ...............................206
Light switch ...........................................206
Replacing light bulbs..........................461
Light bulbs
Replacing .................................................451
Wattage................................................. 548Lights
Automatic High Beam
system.................................................. 209
Fog light switch..................................... 213
Follow me home system................ 207
Headlight switch ................................ 206
Illuminated entry system ................ 390
Interior lights ........................................ 390
Interior lights list ................................. 389
Personal lights..................................... 390
Replacing light bulbs ......................... 451
Trunk light ............................................... 127
Turn signal lever................................. 203
Vanity lights.......................................... 398
Wattage ................................................. 548
Lock steering column ...........................194
Low profile tire ...................................... 430
Luggage security system ....................126
Luggage under tray ............................. 397
L

577Alphabetical index
IS250_EE(OM53C51E)
Maintenance
Do-it-yourself maintenance ...........413
Maintenance data............................. 538
Maintenance requirements ............. 411
Malfunction indicator lamp .............. 476
Master warning light ........................... 478
Meter
Changing the display.......................... 97
Indicators .................................................. 92
Instrument panel light control......... 98
Meters ........................................................ 95
Multi-information display ................ 100
Warning lights .......................................... 91
Mirrors
Inside rear view mirror....................... 161
Outside rear view mirror
defoggers........................................... 382
Outside rear view mirrors...............163
Vanity mirrors..................................... 398MirrorLink........................................... 369
MMS (Multimedia messaging
service) .................................................. 353
Moon roof .................................................170
Door lock linked moon roof
operation................................................ 171
Jam protection function ..................... 171
Operation ............................................... 170
MP3 disc....................................................319
Multi-information display ................... 100
Audio system-linked......................... 100
Drive information.................................. 101
Dynamic radar cruise
control ..................................................229
LDA (Lane Departure Alert) .......242
Navigation system-linked .............. 100
Settings ..................................................... 102
Switching the display .......................... 101
Warning message ............................ 482
M
*: For vehicles with a navigation or multimedia system, refer to
“NAVIGATION AND MULTIMEDIA SYSTEM OWNER’S MANUAL”.