2010 Lexus IS F engine overheat

When trouble arises5
429
5-1. Essential information
Emergency 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 .............. 4395-2. 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
If your vehicle has to
be stopped in an
emergency ............................ 487

5
When trouble arises
483
5-2. Steps to take in an emergency
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. 3 7 3 )
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
■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

530
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
P
R
S

538
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