engine overheat Lexus IS250 2011 User Guide

When trouble arises5
449
IS350/250_U
5-1. Essential informationEmergency flashers............... 450
If your vehicle needs to be towed ....................................... 451
If you think something is wrong ...................................... 457
Fuel pump shut off system ..................................... 458
Event data recorder .............. 459 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... ................................... 461
If a warning message is displayed................................ 470
If you have a flat tire................ 481
If the engine will not start .... 489
If the shift lever cannot be shifted from P ........................ 491
If you lose your keys .............. 492
If the electronic key does not operate properly.......... 493
If the vehicle battery is discharged ............................ 498
If your vehicle overheats ...... 501
If the vehicle becomes stuck........................................ 504
If your vehicle has to be stopped in an
emergency ............................ 506

5
When trouble arises
501
5-2. Steps to take in an emergency
IS350/250_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. ( →P. 388)
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

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
M
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574
IS350/250_U
What to do if...
What to do if...
A tire puncturesP. 4 8 1If you have a flat tire
The engine does not start
P. 4 8 9If the engine will not start
P. 8 5Engine immobilizer system
P. 4 9 8If the vehicle battery is discharged
The shift lever cannot be
moved out of PP. 4 9 1If 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. 5 0 1If your vehicle overheats
The key is lostP. 4 9 2If you lose your keys
The battery runs outP. 4 9 8If the vehicle battery is discharged
The doors cannot be lockedP. 4 3Doors
The horn begins to soundP. 8 7Alarm
The vehicle is stuck in mud or
sandP. 5 0 4If the vehicle becomes stuck