2010 Lexus IS F engine overheat

When trouble arises5
429
10_IS F_U
5-1. Essential informationEmergency flashers.............. 430
If your vehicle needs to be towed ....................................... 431
If you think something is wrong .................................. 437
Fuel pump shut off system .................................... 438
Event data recorder .............. 439 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... .................................. 441
If a warning message is displayed................................. 451
If you have a flat tire............... 465
If the engine will not start ..... 474
If the shift lever cannot be shifted from P ........................ 475
If you lose your keys ............... 476
If the electronic key does not operate properly........... 477
If the vehicle battery is discharged ............................ 480
If your vehicle overheats ..... 483
If the vehicle becomes stuck........................................ 486

5
When trouble arises
483
5-2. Steps to take in an emergency
10_IS F_U
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the automatic air
conditioning system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the engine. Carefully lift the hood after the steam sub-
sides and then restart the engine.
If you do not see steam: Leave the engine running and carefully lift the hood.
Remove the engine compartment cover (front). ( →P. 373)
Check to see if the cooling fans are operating.
If the fans are operating: Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the engine.
If the fans are not operating: Stop the engine immediately and call your local Lexus
dealer.
After the engine has cooled
down sufficiently, check the
engine coolant level and inspect
the radiator core (radiator) for
any leaks.STEP1
STEP2
STEP3
STEP4
STEP5

484
5-2. Steps to take in an emergency
10_IS F_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 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 3 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6

530
Alphabetical index
10_IS F_U
Child-protectors ......................................40
Cigarette lighter....................................323
CleaningExterior ................................................... 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 crui se control ........ 161
Cup holders ............................................. 313
Curtain shield airbags............................85
Customizable features ........................ 514
Daytime running light system .............151
Defogger Rear window........................................206
Side mirrors ..........................................206
Dimension ............................................... 488
Dinghy towing ......................................... 195
Display
Dynamic radar crui se control ........ 161
Satellite switch mode .........................319
Trip information .................................... 147
Warning message...............................451 Do-it-yourself maintenance ............. 366
Door courtesy lights
Door courtesy lights ........................ 306
Wattage ................................................. 498
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
10_IS F_U
Emergency, in case ofIf 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 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.......................489
If the engine will not start ................474
Ignition switch........................................ 124
Overheating......................................... 483
Engine compartment cover..............373 Engine coolant
Capacity .................................................493
Checking ...............................................378
Preparing and checking
before winter ......................................192
Engine coolant temperature
gauge....................................................... 139
Engine immobilizer system.................. 78
Engine oil Capacity .................................................492
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 ................................................. 498
Footwell lights ........................................306
Front fog lights Switch........................................................ 153
Wattage ................................................. 498
Front passenger occupant
classification system ............................ 97
F

534
Alphabetical index
10_IS F_U
Outside rear view mirrorsAdjusting and folding ......................... 67
Mirror position memory ................... 48
Outside temperature display.............147
Overhead console ................................ 312
Overhead courtesy lights
Overhead courtesy lights .............306
Wattage..................................................498
Overheating, Engine ...........................483
Parking assist sensors ............................ 171
Parking brake .......................................... 137
Parking lights Replacing light bulbs........................ 424
Switch ....................................................... 150
Wattage..................................................498
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..................................................498
Rear view mirror Compass ................................................. 341
Rear window de fogger.......................206 Replacing
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
P
R
S

538
10_IS F_U
What to do if...
What to do if...
A tire puncturesP. 4 6 5If you have a flat tire
The engine does not start
P. 4 74If the engine will not start
P. 7 8Engine immobilizer system
P. 4 8 0If the vehicle battery is discharged
The shift lever cannot be
moved out of PP. 4 7 5If the shift lever cannot be shifted
from P
The engine coolant temperature
gauge enters the red zone
Steam can be seen coming
from under the hood
P. 4 8 3If your vehicle overheats
The key is lostP. 4 76If you lose your keys
The battery runs outP. 4 8 0If the vehicle battery is discharged
The doors cannot be lockedP. 3 9Doors
The horn begins to soundP. 8 0Alarm
The vehicle is stuck in mud or
sandP. 4 8 6If the vehicle becomes stuck