2010 Lexus IS F overheating

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2-1. Driving procedures
2
When driving
CAUTION
●Do not leave the engine running in an area with snow build-up, or where it is
snowing. If snowbanks build up around the vehicle while the engine is running,
exhaust gases may collect and enter the vehicle. This may lead to death or a seri-
ous health hazard.
■Exhaust gases
Exhaust gases include harmful carbon monoxide (CO) that is colorless and odor-
less. Inhaling exhaust gases may lead to death or a serious health hazard.
●If the vehicle is in a poorly ventilated area, stop the engine. In a closed area, such
as a garage, exhaust gases may collect and enter the vehicle. This may lead to
death or a serious health hazard.
●The exhaust should be checked occasionally. If there is a hole or crack caused by
corrosion, damage to a joint or abnormal exhaust noise, be sure to have the vehi-
cle inspected and repaired by your Lexus dealer. Failure to do so may allow
exhaust gases to enter the vehicle, resulting in death or a serious health hazard.
■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.

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2-2. Instrument cluster
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 following may indicate that the engine is overheating. Immediately stop the
vehicle in a safe place. (
P. 4 8 3 )
• The engine coolant temperature gauge is in the red zone (H)
• The display on the engine oil temperature gauge flashes
■When driving the vehicle
If the display on the voltage gauge starts to flash while the engine is running, it may
indicate that there is a malfunction in the vehicle’s charging system. Have your vehi-
cle inspected by your Lexus dealer.

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2-4. Using other driving systems
■Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC and hill-start
assist control systems
●A sound may be heard from the engine compartment when the engine is
started or just after the vehicle begins to move. This sound does not indicate that
a malfunction has occurred in any of these systems.
●Any of the following conditions may occur when the above systems are operat-
ing. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
■Hill-start assist control is operational when
●The shift lever is in the D or M position.
●The brake pedal is not depressed.
■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.
■Automatic deactivation of “Sport” mode
When the “ENGINE START STOP” switch is turned OFF after driving in “Sport”
mode, the mode is automatically deactivated.
■If the slip indicator comes on
It may indicate a malfunction in the VSC, TRAC or hill-start assist control system.
Contact your Lexus dealer.

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3-7. Other interior features
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 not running.

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5-2. Steps to take in an emergency
■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 belt while the engine is running.
●Do not loosen the coolant reservoir 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 neces-
sary.
Water can be used in an emer-
gency measure if engine coolant
is unavailable. (P. 4 9 4 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6

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Alphabetical index
Child-protectors ......................................40
Cigarette lighter....................................323
Cleaning
Exterior ................................................... 354
Interior ..................................................... 357
Seat belts................................................358
Clock .......................................................... 318
Coat hooks ............................................. 330
Compass ................................................... 341
Condenser ............................................. 380
Console box ..............................................311
Cooling system
Engine overheating ..........................483
Cornering assist sensors ...................... 171
Cruise control
Cruise control ...................................... 158
Dynamic radar cruise control ........ 161
Cup holders ............................................. 313
Curtain shield airbags............................85
Customizable features ........................ 515
Daytime running light system .............151
Defogger
Rear window ........................................206
Side mirrors ..........................................206
Dimension ................................................490
Dinghy towing ......................................... 195
Display
Dynamic radar cruise control ........ 161
Satellite switch mode .........................319
Trip information .................................... 147
Warning message...............................451Do-it-yourself maintenance ............. 366
Door courtesy lights
Door courtesy lights ........................ 306
Wattage ................................................. 499
Door pockets .......................................... 315
Doors
Door lock ................................ 26, 37, 39
Door windows ........................................69
Side mirrors.............................................. 67
Driver's seat belt reminder light ..... 444
Driving
Correct posture.................................... 83
Procedures............................................... 116
Driving position memory...................... 48
Electric power steering........................ 177
Electronic key
If the electronic key does not
operate properly............................. 477
Emergency flashers
Switch ...................................................... 430
D
E

531
Alphabetical index
Emergency, in case of
If the engine will not start ................474
If the shift lever cannot be
shifted from P ................................... 475
If the vehicle has a discharged
battery..................................................480
If the warning buzzer sounds........ 441
If the warning light turns on ............ 441
If a warning message is
displayed .............................................. 451
If you have a flat tire ........................ 465
If you lose your keys ........................ 476
If you think something is
wrong....................................................437
If the electronic key does not
operate properly ............................. 477
If your vehicle becomes stuck .... 486
If your vehicle has to be
stopped in an emergency ......... 487
If your vehicle needs to be
towed ..................................................... 431
If your vehicle overheats................ 483
Engine
ACCESSORY mode ....................... 124
Compartment ......................................372
Engine switch ........................................ 124
Hood ....................................................... 369
How to start the engine.................... 124
Identification number......................... 491
If the engine will not start ................474
Ignition switch........................................ 124
Overheating......................................... 483
Engine compartment cover..............373Engine coolant
Capacity .................................................494
Checking ...............................................378
Preparing and checking
before winter ......................................192
Engine coolant temperature
gauge....................................................... 139
Engine immobilizer system.................. 78
Engine oil
Capacity .................................................493
Checking ............................................... 374
Preparing and checking
before winter ......................................192
Engine oil maintenance data............ 376
EPS ............................................................... 177
Event data recorder ............................ 439
First-aid kit storage belt ..................... 332
Floor mat ................................................... 331
Fluid
Brake ....................................................... 380
Washer .................................................. 385
Fog lights
Switch........................................................ 153
Wattage ................................................. 499
Footwell lights ........................................306
Front fog lights
Switch........................................................ 153
Wattage ................................................. 499
Front passenger occupant
classification system ............................ 97
F

534
Alphabetical index
Outside rear view mirrors
Adjusting and folding ......................... 67
Mirror position memory ................... 48
Outside temperature display.............147
Overhead console ................................ 312
Overhead courtesy lights
Overhead courtesy lights .............306
Wattage.................................................. 499
Overheating, Engine...........................483
Parking assist sensors ............................ 171
Parking brake .......................................... 137
Parking lights
Replacing light bulbs........................ 424
Switch ....................................................... 150
Wattage.................................................. 499
PCS ............................................................. 184
Personal lights
Switch ..................................................... 308
Power outlet............................................ 324
Power windows ........................................ 69
Pre-collision system.............................. 184
Radar cruise control ............................... 161
Radiator ................................................... 380
Radio ........................................................... 210
RDS ............................................................. 212
Rear turn signal lights
Replacing light bulbs........................ 424
Wattage.................................................. 499
Rear view mirror
Compass ................................................. 341
Rear window defogger.......................206Replacing
Electronic key battery ..................... 406
Fuses ........................................................ 408
Light bulbs .............................................424
Reporting safety defects for
U.S. owners.......................................... 522
Safety connect ....................................... 345
Seat belts
Adjusting the seat belt ....................... 58
Automatic locking retractor ........... 59
Child restraint system
installation ............................................106
Cleaning and maintaining
the seat belts .................................... 358
Emergency locking retractor......... 59
How to wear your seat belt ............. 57
How your child should wear
the seat belt.......................................... 60
Pregnant women,
proper seat belt use ........................ 59
Reminder light......................................444
Seat belt extenders.............................. 60
Seat belt pretensioners ..................... 58
Seat heaters ............................................ 325
Seat position memory............................ 52
Seating capacity....................................... 191
Seats
Adjustment ............................................... 47
Adjustment precautions .................... 47
Child seats/child restraint
system installation............................106
Cleaning .................................................357
Driver’s seat position memory ...... 48
Front passenger seat position
memory ..................................................52
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