cruise control Lexus IS250 2015 Owner's Guide

4758-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53C50U)
Indicates that the vehicle is being driven at 3 mph (5 km/
h) or more with the parking brake still engaged.A buzzer also sounds.
→ Release the parking brake.
Indicates that the shift lever was used to attempt to shift
to the first gear position in M mode on a slippery road
surface
The gear position will not shift from the second gear.
A buzzer also sounds.
→ Drive the vehicle in the second or a higher gear
position.
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Indicates a malfunction in:
•The ABS; or
• The brake assist system
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Indicates that the engine coolant temperature is too high
A buzzer also sounds.
→ P. 5 0 6
(If equipped)
Indicates that the radar sensor is dirty or covered with
ice
A buzzer also sounds.
→ Clean the sensor.
(If equipped)
Indicates that the dynamic radar cruise control system is
unable to judge vehicle-to-vehicle distance
A buzzer also sounds.
→ Turn off snow mode.
If the windshield wipers are on, turn them off or set
them to a mode other than AUTO or high speed
wiper operation.
Wa r n i n g m e s s a g eDetails/Actions
(U.S.A.) (Canada) (Flashes)
(U.S.A.) (Canada)

4768-2. Steps to take in an emergency
IS350/250_U (OM53C50U)
(If equipped)
Indicates that the LDA (Lane Departure Alert) system is
suspended (The camera sensor temperature is higher
than the operation temperature range)A buzzer also sounds.
→ Restart the LDA after driving for a while.
(If equipped)
Indicates that a Blind Spot Monitor sensor or the sur-
rounding area on the bumper is dirty or covered with ice
A buzzer also sounds.
→ Clean the sensor and its surrounding area on the
bumper.
Indicates a malfunction in:
• The cruise control system; or
• The dynamic radar cruise control system (if equipped)
Press the “ON/OFF” button once to deactivate the
system, and then press the button again to reactivate
the system.
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
(If equipped)
Indicates a malfunction in the LDA (Lane Departure
Alert) system
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
(If equipped)
Indicates a malfunction in the PCS (Pre-Collision Sys-
tem)
A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
(If equipped)
Indicates a malfunction in the BSM (Blind Spot Monitor)
system A buzzer also sounds.
→ Have the vehicle inspected by your Lexus dealer.
Indicates abnormal engine oil pressure
A buzzer also sounds.
→ Immediately stop the vehicle in a safe place and
contact your Lexus dealer.
Wa r n i n g m e s s a g eDetails/Actions
(Flashes)

4818-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53C50U)
■Wa r n i n g m e s s a g e s
The warning message illustrations used are intended as examples, and may differ from
the image that is actually displaye d on the multi-information display.
■Warning message in radar cruise mode (if equipped)
In the following situations, the warning message may not be displayed even if vehicle-to-
vehicle distance decreases:
●When your vehicle and the vehicle ahead are traveling at the same speed or the vehicle
ahead is traveling more quickly than your vehicle
●When the vehicle ahead is traveling at a very low speed
●Immediately after cruise control speed is set
●At the instant the accelerator pedal is depressed
■The LDA (Lane Departure Alert) lane departure warning function (if equipped)
In the following situations, the warning message will not be displayed even if a lane line is
crossed.
●When the vehicle speed deviates from the operating range of the LDA system func-
tions
●When the lane lines cannot be recognized
■Reset the maintenance data (U.S.A. only)
Make sure to reset the oil change system. ( →P. 4 0 3 )
■Conditions that the tire pressure warning system may not function properly
→P. 4 2 8
■Warning buzzer
→P. 4 6 9

4958-2. Steps to take in an emergency
8
When trouble arises
IS350/250_U (OM53C50U)
CAUTION
■When using the compact spare tire
●Remember that the compact spare tire provided is specifically designed for use with
your vehicle. Do not use your compact spare tire on another vehicle.
●Do not use more than one compact spare tires simultaneously.
●Replace the compact spare tire with a standard tire as soon as possible.
●Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations
that cause sudden engine braking.
■When the compact spare tire is attached
The vehicle speed may not be correctly detected, and the following systems may not
operate correctly:
Also, not only can the following system not be utilized fully, but it may even negatively
affect the drive-train components:
• AWD system
■Speed limit when using the compact spare tire
Do not drive at speeds in excess of 50 mph (80 km/h) when a compact spare tire is
installed on the vehicle.
The compact spare tire is not designed for driving at high speeds. Failure to observe
this precaution may lead to an accident causing death or serious injury.
■After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their storage
location to reduce the possibility of personal injury during a collision or sudden brak-
ing.
NOTICE
■Driving with tire chains and the compact spare tire
Do not fit tire chains to the compact spare tire.
Tire chains may damage the vehicle body and adversely affect driving performance.
■When replacing the tires
When removing or fitting the wheels, tires or the tire pressure warning valve and trans-
mitter, contact your Lexus dealer as the tire pressure warning valve and transmitter
may be damaged if not handled correctly.
• ABS & Brake assist
•VSC
•TRAC
• Cruise control (if equipped)
• Dynamic radar cruise control (if equipped)
•PCS (if equipped)
•EPS • Adaptive Variable Suspension System
(if equipped)
• LDA (Lane Departure Alert) (if equipped)
• VGRS (if equipped)
• Rear view monitor system (if equipped)
• Intuitive parking assist (if equipped)
• Navigation system (if equipped)

565Alphabetical index
IS350/250_U (OM53C50U)
Alarm .............................................................. 71
Anchor brackets ...................................... 58
Antennas (smart access system with push-button start) ....................... 114
Anti-lock Brake System (ABS)....... 240 Function ..................................................240
Warning light ...................................... 466
Approach warning (dynamic
radar cruise control) ......................... 201
Armrest .................................................... 379
Assist grip ................................................. 381
Audio input...............................................274
Audio system.......................................... 266 Audio input............................................ 274
AUX port/USB port........................ 274
Bluetooth
® audio.................................317
CD player ..............................................295
iPod ............................................................ 301
MP3/WMA/AAC disc .................295
Optimal use ..........................................282
Portable music player ..................... 308
Radio ....................................................... 289
Steering wheel audio switch .......... 271
USB memory ...................................... 304 Automatic headlight leveling
system...................................................... 174
Warning light ....................................... 467
Automatic High Beam ......................... 176
Automatic light control system...................................................... 173
Automatic transmission....................... 164 If the shift lever
cannot be shifted from P ............498
M mode .................................................... 167
Paddle shift switches..........................166
AUX port ................................................. 274
Average fuel economy ..........................87
Average vehicle speed..........................87

567Alphabetical index
IS350/250_U (OM53C50U)
Child safety ................................................ 53Airbag precautions .............................. 39
Battery precautions ...............421, 505
Child restraint system ......................... 54
How your child should wear the seat belt .......................................... 32
Installing child restraints.................... 58
Moon roof precautions.................... 144
Power window lock switch ............ 138
Power window precautions .......... 140
Rear door child-protectors ........... 106
Removed electronic key battery precautions.............. 440
Seat belt extender
precautions ...........................................35
Seat belt precautions .......................... 57
Seat heater precautions................. 366
Trunk precautions................................. 112
Child-protectors.................................... 106 Cleaning ....................................... 396, 399
Aluminum wheels .............................. 397
Exterior ...................................................396
Interior ..................................................... 399
Seat belts............................................... 400
Clock .......................................................... 377
Coat hooks ...............................................381
Compass ................................................. 387
Condenser ................................................418
Console box ............................................. 371
Cooling system ....................................... 417 Engine overheating ......................... 506
Cruise control Cruise control ....................................... 192
Dynamic radar crui se control .......196
Cup holders.............................................372
Current fuel consumption ....................87
Curtain shield airbags ............................ 37
Customizable features .......................537

568Alphabetical index
IS350/250_U (OM53C50U)
Daytime running light system ............ 174
DefoggerFront windshield .................................362
Outside rear view mirrors .............362
Rear window ........................................362
Differential Front differential ................................... 517
Rear differential .................................... 517
Dimension .................................................512
Dinghy towing......................................... 158
Display
Drive information .................................. 87
Dynamic radar crui se control....... 196
LDA (Lane Departure Alert) ...... 209
Multi-information display ..................86
Warning message ............................. 472
Distance ......................................................88
Do-it-yourself maintenance ............. 409
Door courtesy lights
Location ................................................. 368
Wattage ................................................... 521 Doors ..........................................................103
Automatic door locking
and unlocking system ................... 106
Door glasses ......................................... 138
Door lock................................................ 105
Open door warning buzzer ..........104
Open door warning light .............. 467
Outside rear view mirrors ..............135
Rear door child-protector ............. 106
Drive information .....................................87
Drive info 1/Drive info 2 ....................... 88
Driver’s seat position memory.......... 123
Driving ........................................................ 146 Break-in tips ........................................... 147
Correct driving posture .................... 28
Driving mode select switch ...........237
Procedures .............................................146
Winter drive tips ................................260
Dynamic radar cruise control ........... 196
D

576Alphabetical index
IS350/250_U (OM53C50U)
Radar cruise control (dynamic radar cruise control) ..........................196
Radiator ..................................................... 418
Radio.......................................................... 289
Rear personal lights............................. 369
Wattage ................................................... 521
Rear seats ................................................... 121
Fold down the seatback .................... 121
Luggage security system .................. 110
Rear sunshade ....................................... 379 Operation ..............................................379
Reverse operation feature.............379
Rear turn signal lights ...........................170
Replacing light bulbs ........................449
Turn signal lever .................................. 170
Wattage ................................................... 521
Rear view mirror
Inside rear view mirror ..................... 133
Outside rear view mirrors .............. 135 Rear window defoggers .....................362
Refueling................................................... 188
Capacity ...................................................514
Fuel types.................................................514
If the fuel filler door cannot be opened .......................... 190
Opening the fuel tank cap ............. 190
Remote Touch
*
Replacing Electronic key battery ..................... 439
Fuses .......................................................... 441
Light bulbs............................................. 444
Tires ..........................................................486
Reporting safety defects
for U.S. owners .................................. 548
Reset the maintenance data ............ 403
Rev indicator ............................................. 88
Rev peak ..................................................... 88
R

579Alphabetical index
IS350/250_U (OM53C50U)
Sun shadeRear...........................................................379
Roof.............................................................142 switch settings ...................................88
Switches Audio remote control
switches ................................................. 271
BSM (Blind Spot Monitor)
switch...................................................... 271
Cruise control switch........................ 192
Door lock switches ............................ 105
Driving mode select switch .......... 237
Driving position memory switches .................................................123
Dynamic radar cruise control switch .................................... 196
Emergency flashers switch .......... 456
Engine switch ........................................ 159
Fog light switch ...................................... 181
Garage door opener switches .............................................. 382
Heated steering wheel
switch................................................... 366
Ignition switch ....................................... 159
Intuitive parking assist ........................214
LDA (Lane Departure Alert)
switch................................................... 209
Light switches ........................................173
Meter control switches ...................... 87 Moon roof switches .............................141
Outside rear view mirror
switches ................................................135
Paddle shift switches..........................166
PCS OFF switch .................................247
Power door lock switch .................. 105
Power window switches ................. 138
Rear sunshade switch ..................... 379
Rear window and outside rear view mirror defoggers
switch ................................................... 362
Seat heater switches ........................ 367
Seat ventilator switches .................. 367
Snow mode switch .............................165
Steering wheel switch ........................ 87
“SOS” button .......................................390
Talk switch............................................. 329
Telephone switches.......................... 329
Tilt and telescopic steering control switch ....................131
Tire pressure warning reset switch ................................................... 425
Trunk opener switch ......................... 109
Trunk opener main switch ............... 110
Vehicle-to-vehicle distance button .....................................................199
VSC OFF switch ............................... 242
Window lock switch ......................... 138
Windshield wipers and washer switch ...........................182