2009 Lexus IS F engine overheat

When trouble arises5
343
08_IS F_U_(L/O_0808)
5-1. Essential informationEmergency flashers............... 344
If your vehicle needs to be towed................................. 345
If you think something is wrong ................................... 351
Fuel pump shut off system.... 352
Event data recorder .............. 353 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... ................................. 355
If a warning message is displayed................................ 365
If you have a flat tire............... 379
If the engine will not start .... 388
If the shift lever cannot be shifted from P ....................... 389
If you lose your keys .............. 390
If the electronic key does not operate properly........... 391
If the vehicle battery is discharged ............................ 394
If your vehicle overheats ..... 397
If the vehicle becomes stuck........................................ 400

5
When trouble arises
397
5-2. Steps to take in an emergency
08_IS F_U_(L/O_0808)
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. 2 8 7 )
Check to see if the cooling fan is operating.
If the fan is operating: Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the engine.
If the fan is 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

398
5-2. Steps to take in an emergency
08_IS F_U_(L/O_0808)
■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 fan 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 0 7 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6

444
Alphabetical index
08_IS F_U_(L/O_0808)
Child-protectors ......................................38
Cigarette lighter.................................... 244
CleaningExterior ...................................................268
Interior ....................................................... 271
Seat belts.................................................272
Clock .........................................................239
Coat hooks ............................................... 251
Compass .................................................. 262
Condenser .............................................. 294
Console box ........................................... 232
Cooling system Engine overheating .......................... 397
Cornering assist sensors .................... 163
Cruise control Cruise control ...................................... 150
Dynamic radar crui se control .......153
Cup holders ............................................ 234
Curtain shield airbags............................ 78
Customizable features .......................428 Daytime running light system ............143
Defogger
Rear window .........................................198
Side mirrors............................................198
Dimension ............................................... 402
Dinghy towing..........................................187
Display Dynamic radar crui se control....... 153
Satellite switch mode....................... 240
Trip information.................................... 139
Warning message ............................ 365
Do-it-yourself maintenance .............280
Door courtesy lights Door courtesy lights ......................... 227
Wattage ................................................... 412
Door pockets ......................................... 236
Doors Door glasses............................................63
Door lock ................................ 24, 35, 37
Side mirrors............................................... 61
Driver's seat belt reminder light .....358
Driving Correct posture..................................... 76
Procedures.............................................108
Driving position memory...................... 45D

445
Alphabetical index
08_IS F_U_(L/O_0808)
Electric power steering ....................... 169
Electronic keyIf the electronic key does not operate properly .............................. 391
Emergency flashers Switch ...................................................... 344
Emergency, in case of If the engine will not start ...............388
If the shift lever cannot be shifted from P ................................... 389
If the vehicle has discharged battery.................................................. 394
If the warning buzzer sounds...... 355
If the warning light turns on .......... 355
If the warning message is displayed ............................................ 365
If you have a flat tire ........................ 379
If you lose your keys ........................390
If you think something is wrong..................................................... 351
If the electronic key does not operate properly .............................. 391
If your vehicle becomes stuck ....400
If your vehicle needs to be towed ................................................... 345
If your vehicle overheats................ 397 Engine
ACCESSORY mode......................... 116
Compartment..................................... 286
Engine switch .......................................... 116
Hood ........................................................283
How to start the engine ..................... 116
Identification number ...................... 403
If the engine will not start............... 388
Ignition switch ......................................... 116
Overheating .........................................397
Engine compartment cover ............. 287
Engine coolant Capacity .................................................407
Checking ............................................... 292
Preparing and checking before winter ..................................... 184
Engine coolant temperature gauge......................................................... 131
Engine immobilizer system....................71
Engine oil Capacity ................................................ 406
Checking .............................................. 288
Preparing and checking before winter ..................................... 184
Engine oil maintenance data............290
EPS .............................................................. 169
Event data recorder ............................353E

448
Alphabetical index
08_IS F_U_(L/O_0808)
Noise from under vehicle...................... 16
Odometer...................................................131
OilEngine oil ...............................................288
Opener
Fuel filler door......................................... 68
Hood........................................................283
Trunk ............................................................. 41
Outer foot lights
Outer foot lights ..................................227
Wattage.................................................... 412
Outside rear view mirrors Adjusting and folding ........................... 61
Mirror position memory ................... 45
Outside temperature display............ 139
Overhead console ............................... 233
Overhead courtesy lights
Overhead courtesy lights ..............227
Wattage.................................................... 412
Overheating, Engine ........................... 397
Parking assist sensors .......................... 163
Parking brake .......................................... 129
Parking lights Replacing light bulbs........................338
Switch ........................................................ 142
Wattage.................................................... 412
PCS ..............................................................176
Personal lights Switch ...................................................... 229
Power outlet............................................245
Power windows ........................................ 63
Pre-collision system...............................176 Radar cruise control............................. 153
Radiator .................................................... 294
Radio.......................................................... 202
RDS ............................................................ 203
Rear turn signal lights
Replacing light bulbs ....................... 338
Wattage ................................................... 412
Rear view mirror
Compass ................................................262
Rear window defogger ....................... 198
Replacing Electronic key battery ..................... 320
Fuses......................................................... 322
Light bulbs ............................................ 338
Reporting safety defects for U.S. owners.......................................... 436
Seat belts Adjusting the seat belt ........................53
Automatic locking retractor ............54
Child restraint system installation ............................................. 98
Cleaning and maintaining the seat belts ..................................... 272
Emergency locking retractor..........54
How to wear your seat belt .............52
How your child should wear the seat belt.......................................... 55
Pregnant women, proper seat belt use .........................54
Reminder light..................................... 358
Seat belt extenders.............................. 55
Seat belt pretensioners ......................53N
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453
08_IS F_U_(L/O_0808)
What to do if...
What to do if...
A tire puncturesP. 3 7 9If you have a flat tire
The engine does not start
P. 3 8 8If the engine will not start
P. 7 1Engine immobilizer system
P. 3 9 4If the vehicle battery is discharged
The shift lever cannot be
moved outP. 3 8 9If 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. 3 9 7If your vehicle overheats
The key is lostP. 3 9 0If you lose your keys
The battery runs outP. 3 9 4If the vehicle battery is discharged
The doors cannot be lockedP. 3 7Doors
The horn begins to soundP. 7 3Alarm
The vehicle is stuck in mud or
sandP. 4 0 0If the vehicle becomes stuck