heating Lexus IS250 2011 Owner's Manual

131
2-1. Driving procedures
2
When driving
IS350/250_U
CAUTION
■When taking a nap in the vehicle
Always turn the engine off. Otherwise, you may accidentally move the shift lever or
depress the accelerator pedal, which could cause an accident or fire due to engine
overheating. Additionally, if the vehicle is parked in a poorly ventilated area, exhaust
gases may collect and enter the vehicle, leading to death or a serious health hazard.
■When braking the vehicle
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and may cause one side of
the vehicle to brake differently than the other side. Also the parking brake may
not securely hold the vehicle.
●If the power brake assist function does not operate, do not follow other vehicles
closely and avoid downhills or sharp turns that require braking.
In this case, braking is still possible, but it will require more force on the pedal than
usual. Braking distance may also increase.
●Do not pump the brake pedal if the engine stalls.
Each push on the brake pedal uses up the reserve for the power-assisted brakes.
●The brake system consists of 2 individual hydraulic systems: if one of the systems
fails, the other will still operate. In this case, the brake pedal should be depressed
more firmly than usual and braking distance becomes longer.
Do not drive your vehicle with only a single brake system. Have your brakes fixed
immediately.
■If the vehicle becomes stuck or bogged (AWD models)
Do not spin the wheels recklessly when any of the tires is up in the air, or stuck in
sand or mud, etc. This may damage the drive system components or propel the
vehicle forward (or in another direction) and cause an accident.

149
2-1. Driving procedures
2
When driving
IS350/250_U
NOTICE
■Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to brake components over-
heating, which may affect braking performance and increase brake wear.

156
2-2. Instrument cluster
IS350/250_U
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indi-
cates the maximum engine speed.
●The engine may be overheating if the temperature gauge is in the red zone (H). In
this case, immediately stop the vehicle in a safe place, and check the engine after
it has cooled completely. ( →P. 5 0 1 )

189
2-4. Using other driving systems
2
When driving
IS350/250_U
■Hill-start assist control is operational when
●The shift lever is in the D or S position.
●The brake pedal is not depressed.
●The vehicle rolls backward.
■EPS operation sound
When the steering wheel operates, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Reduced effectiveness of EPS
The effectiveness of EPS is reduced to prevent the system from overheating when
there is frequent steering input over an extended period of time. The steering wheel
may feel heavy as a result. Should this occur, refrain from excessive steering input or
stop the vehicle and turn the engine OFF. The system should return to normal within
10 minutes.
■If the slip indicator comes on
It may indicate a malfunction in the VSC, TRAC or hill start assist control function.
Contact your Lexus dealer.
CAUTION
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded.
●The vehicle hydroplanes while driving at high speed on the wet or slick road.
■Stopping distance when the ABS is operating may exceed that of normal condi-
tions
The ABS is not designed to shorten the vehicle’s stopping distance. Always main-
tain a safe distance from the vehicle in front of you in the following situations.
●When driving on dirt, gravel or snow-covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or roads with uneven surfaces

337
3-7. Other interior features
3
Interior features
IS350/250_U
CAUTION
■Burns
●Use caution when seating the following persons in a seat with the seat heater on
to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the disabled
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs,cold remedies, etc.)
●Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature of the
seat and may lead to overheating.
NOTICE
■To prevent seat heater damage
Do not put unevenly weighted objects on the seat and do not stick sharp objects
(needles, nails, etc.) into the seat.
■To prevent battery discharge
Turn the switches off when the engine is off.

340
3-7. Other interior features
IS350/250_U
CAUTION
■Burns
●Use caution when seating the following persons in a seat with the seat heater on
to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the disabled
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs,cold remedies, etc.)
●Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature of the
seat and may lead to overheating.
NOTICE
■To prevent seat heaters and ventilators damage
Do not put unevenly weighted objects on the seat and do not stick sharp objects
(needles, nails, etc.) into the seat.
■To prevent battery discharge
Turn the switches off when the engine is off.

502
5-2. Steps to take in an emergency
IS350/250_U
■Overheating
If you observe the following, your vehicle may be overheating.
●The engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
●Steam is coming from under the hood.
CAUTION
■To prevent an accident or injury when inspecting under the hood of your vehicle
●If steam is seen coming from under the hood, do not open the hood until the
steam has subsided. The engine compartment may be very hot, causing serious
injury such as burns.
●Keep hands and clothing away from the fans and other belts while the engine is
running.
●Do not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam released
under pressure.
Add engine coolant if required.
Water can be used in an emer-
gency if engine coolant is
unavailable. (→P. 5 1 5 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6

565
Alphabetical index
IS350/250_U
Bluetooth® phone ............................... 284
Brake
Fluid .......................................................... 394
Parking brake ........................................148
Brake assist ...............................................185
Care Exterior ...................................................368
Interior....................................................... 371
Seat belts ................................................372
Cargo capacity ........................................ 191
Cargo hooks ...........................................347
CD changer ............................................ 227
CD player................................................. 227
Chains......................................................... 195
Child restraint system Booster seats, definition...................109
Booster seats, installation ..................116
Convertible seats, definition ..........109
Convertible seats, installation .........116
Front passenger occupant classification system .......................104
Infant seats, definition ........................109
Infant seats, installation........................116
Installing CRS with LATCH anchors ................................................... 114
Installing CRS with seat belts ..........116
Installing CRS with top straps .........119 Child safety
Airbag precautions ..............................99
Battery precautions ............ 398, 500
Child restraint system ....................... 109
Child-protectors ................................... 44
How your child should wear
the seat belt .......................................... 63
Installing child restraints..................... 113
Moon roof precautions....................... 81
Power window lock switch .............. 75
Power window precautions .............77
Removed electronic key
battery precautions ....................... 422
Seat belt comfort guide .......................61
Seat belt extender precautions......65
Seat belt precautions .......................... 64
Seat heater precautions..... 337, 340
Trunk precautions................................. 49
Child-protectors ...................................... 44
Cigarette lighter....................................333
Cleaning Exterior................................................... 368
Interior .......................................................371
Seat belts ................................................ 372
Clock .........................................................328
Coat hooks ..............................................345
Compass ..................................................356
Condenser .............................................. 394
Console box ...........................................320
Cooling system Engine overheating............................ 501
Cornering assist sensors .....................179
C

566
Alphabetical index
IS350/250_U
Cruise control ......................................... 175
Cup holder .............................................. 322
Curtain shield airbags............................ 93
Customizable features ...................... 540
Daytime running light system ........... 166
DefoggerRear window.......................................... 214
Side mirror .............................................. 214
Dimension ............................................... 508
Dinghy towing ............................. 200, 201
Display
Satellite switch mode ....................... 329
Trip information ..................................... 161
Warning message............................. 470
Do-it-yourself maintenance ............ 380
Door courtesy lights Door courtesy lights...........................315
Wattage.................................................. 524
Door pockets..........................................324
Doors Door lock................................ 28, 40, 43
Door windows ....................................... 75
Side mirrors ..............................................72
Driver's seat belt reminder light ..... 463
Driving Correct posture ...................................... 91
Procedures ............................................. 124
Driving position memory ......................53 Electric power steering....................... 185
Electronic key
If the electronic key does not operate properly............................ 493
Emergency, in case of If the engine will not start ............... 489
If the shift lever cannot be shifted from P..................................... 491
If the vehicle has a discharged battery ................................................. 498
If the warning buzzer sounds........ 461
If the warning light turns on............ 461
If a warning message is displayed ............................................ 470
If you have a flat tire .......................... 481
If you lose your keys .........................492
If you think something is wrong ...................................................457
If the electronic key does not operate properly............................ 493
If your vehicle becomes stuck .... 504
If your vehicle has to be stopped in an emergency ............................506
If your vehicle needs to be
towed ..................................................... 451
If your vehicle overheats..................501
Emergency flashers Switch...................................................... 450
Engine Compartment ..................................... 386
Engine switch ........................................ 134
Hood ....................................................... 383
How to start the engine ................... 134
Identification number ...................... 509
If the engine will not start ............... 489
Ignition switch ....................................... 134
Overheating ..........................................501
D
E

569
Alphabetical index
IS350/250_U
Light bulbsReplacing............................................... 439
Wattage ................................................. 524
Lights
Door courtesy lights ..........................315
Emergency flasher switch ............. 450
Fog light switch.....................................168
Hazard light switch...........................450
Headlights switch ................................165
Interior light switch.............................. 317
Outer foot lights...................................315
Overhead courtesy light ................. 315
Personal light switch .......................... 317
Replacing light bulbs ....................... 439
Scuff lights ............................................... 315
Shift lever light .......................................315
Turn signal lever................................... 147
Vanity lights ...........................................327
Wattage ................................................. 524
Load capacity .......................................... 194
Maintenance
Do-it-yourself maintenance .........380
General maintenance ..................... 376
Maintenance data ............................ 508
Maintenance requirements ...........374
Manual transmission............................. 145
Meter Instrument panel light control ....... 152
Meters .........................................................151
Micro dust and pollen filter ................ 210 Mirrors
Inside rear view mirror ....................... 70
Side mirror heater ...............................214
Side mirrors ............................................. 72
Vanity mirrors ...................................... 327
Moon roof................................................... 78
MP3 disc .................................................. 234
Multi-information display ................... 160
Noise from under vehicle...................... 19
Odometer...................................................151
Oil Engine oil............................................... 389
Opener Fuel filler door ......................................... 82
Hood ....................................................... 383
Trunk ........................................................... 47
Outer foot lights Outer foot lights .................................. 315
Wattage ..................................................524
Outside rear view mirrors
Adjusting and folding.......................... 72
Mirror position memory ....................53
Outside temperature display ............. 161
Overhead console ............................... 322
Overhead courtesy lights Overhead courtesy lights ............... 315
Wattage ..................................................524
Overheating, Engine............................ 501L
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