engine overheat Lexus IS F 2010 Audio/video System / LEXUS 2010 IS F OWNERS MANUAL (OM53A25U)

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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 .................... 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
If your vehicle has to be
stopped in an emergency ...... 4876-1. Specifications
Maintenance data
(fuel, oil level, etc.)..................... 490
Fuel information ........................... 500
Tire information ........................... 503
6-2. Customization
Customizable features ............... 515
6-3. Initialization
Items to initialize .......................... 520
Reporting safety defects
for U.S. owners........................... 522
Seat belt instructions
for Canadian owners
(in French) .................................... 523
Abbreviation list ................................... 526
Alphabetical index............................... 528
What to do if... .......................................538
5When trouble arises6Vehicle specifications
7For owners
Index

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2-1. Driving procedures
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When driving
CAUTION
●During normal driving, do not turn off the engine. Turning the engine off while
driving will not cause loss of steering or braking control, but the power assist to
these systems will be lost. This will make it more difficult to steer and brake, so you
should pull over and stop the vehicle as soon as it is safe to do so.
However, in the event of an emergency, such as if it becomes impossible to stop
the vehicle in the normal way: P. 4 4 1
●Use engine braking (downshift) to maintain a safe speed when driving down a
steep hill.
Using the brakes continuously may cause the brakes to overheat and lose effec-
tiveness. (P. 130, 132)
●When stopped on an inclined surface, use the brake pedal and parking brake to
prevent the vehicle from rolling backward or forward and causing an accident.
●Do not adjust the position of the steering wheel, the seat, or the inside or outside
rear view mirrors while driving.
Doing so may result in a loss of vehicle control that can cause accidents that may
result in death or serious injury.
●Always check that all passengers' arms, heads or other parts of their bodies are
not outside the vehicle, as this may result in death or serious injury.
●Do not drive in excess of the speed limit. Even if the legal speed limit permits it, do
not drive over 85 mph (140 km/h) unless your vehicle has high-speed capability
tires. Driving over 85 mph (140 km/h) may result in tire failure, loss of control and
possible injury. Be sure to consult a tire dealer to determine whether the tires on
your vehicle are high-speed capability tires or not before driving at such speeds.
■When driving on slippery road surfaces
●Sudden braking, acceleration and steering may cause tire slippage and reduce
your ability to control the vehicle, resulting in an accident.
●Sudden changes in engine speed, such as engine braking caused by up-shifting
or down-shifting, may cause the vehicle to skid, resulting in an accident.
●After driving through a puddle, lightly depress the brake pedal to make sure that
the brakes are functioning properly. Wet brake pads may prevent the brakes from
functioning properly. If the brakes on only one side are wet and not functioning
properly, steering control may be affected, resulting in an accident.

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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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2-3. Operating the lights and windshield wipers
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When driving
Headlight cleaner switch
■The headlight cleaner can be operated when
The “ENGINE START STOP” switch is in IGNITION ON mode and the headlight
switch is turned on.
■Windshield washer linked operation
Only for the first time when the windshield washer is operated after the “ENGINE
START STOP” switch is turned to IGNITION ON mode with the headlights on, the
headlight cleaners will also operate once. (P. 1 5 4 )
NOTICE
■When the washer fluid tank is empty
Do not use this function when the washer fluid tank is empty. This may cause the
washer fluid pump to overheat.
Washer fluid can be sprayed on the headlights.
Press the switch to clean the
headlights.
: If equipped

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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
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Interior features
Cigarette lighter
■The cigarette lighter can be used when
The “ENGINE START STOP” switch is in ACCESSORY or IGNITION ON mode.
CAUTION
■When not in use
Keep the lid closed.
Injuries may result in the event of an accident or sudden braking.
■To avoid burns or fires
●Do not touch the metal parts of the cigarette lighter.
●Do not hold the cigarette lighter down. It could overheat and cause a fire.
●Do not insert anything other than the cigarette lighter into the outlet.
Push the back part of the lid to
open, and push the cigarette
lighter down.
The cigarette lighter will pop up
when it is ready for use.

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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.

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

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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
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