engine overheat Lexus IS250C 2012 Instrument cluster / LEXUS 2012 IS250C,IS350C OWNERS MANUAL (OM53A62U)

TABLE OF CONTENTSIndex
6
5-1. Essential informationEmergency flashers.................... 486
If your vehicle needs to be towed ....................................... 487
If you think something is wrong ......................................... 493
Fuel pump shut off system ........ 494
5-2. Steps to take in an emergency If a warning light turns on or a warning buzzer
sounds... ........................................ 495
If a warning message is displayed ...................................... 504
If you have a flat tire (vehicles with standard
tires) ................................................. 518
If you have a flat tire (vehicles with run-flat
tires) ................................................ 527
If the engine will not start .......... 529
If the shift lever cannot be shifted from P......................... 531
If you lose your keys .................... 532
If the electronic key does not operate properly .............. 533
If the vehicle battery is discharged .................................. 538
If your vehicle overheats ........... 542 If the vehicle becomes
stuck................................................ 545
If the retractable hardtop does not close............................. 547
If your vehicle has to be stopped in an emergency ...... 557
6-1. Specifications Maintenance data (fuel, oil level, etc.).................... 560
Fuel information ............................ 578
Tire information............................ 582
6-2. Customization Customizable features.............. 595
6-3. Initialization Items to initialize .......................... 600
Reporting safety defects for U.S. owners........................... 602
Seat belt instructions for Canadian owners
(in French) ................................... 603
SRS airbag instructions for Canadian owners
(in French) ................................... 606
5When trouble arises
6Vehicle specifications
7For owners

142
2-1. Driving procedures
CAUTION
●Do not shift the shift lever to R while the vehicle is moving forward.
Doing so can damage the transmission and may result in a loss of vehicle control.
●Do not shift the shift lever to D (vehicles with an automatic transmission) or 1
(vehicles with a manual transmission) while the vehicle is moving backward.
Doing so can damage the transmission and may result in a loss of vehicle control.
●Moving the shift lever to N while the vehicle is moving will disengage the engine
from the transmission. Engine braking is not available when N is selected.
●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. 5 5 7
●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. 1 5 4 )
●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.

144
2-1. Driving procedures
CAUTION
●If the vehicle is stopped on an incline, in order to prevent accidents caused by the
vehicle rolling forward or backward, always depress the brake pedal and securely
apply the parking brake as needed.
●Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause the
exhaust system to overheat, which could result in a fire if combustible material is
nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters, spray cans, or soft drink cans in the vehi-
cle when it is in the sun.
Doing so may result in the following.
• Gas may leak from a cigarette lighter or spray can, and may lead to a fire.
• The temperature inside the vehicle may cause the plastic lenses and plastic
material of eye glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray over the interior of
the vehicle, and may also cause a short circuit in the vehicle's electrical com-
ponents.
●Always apply the parking brake, shift the shift lever to P (vehicles with an auto-
matic transmission only), stop the engine and lock the vehicle.
Do not leave the vehicle unattend ed while the engine is running.
●Do not touch the exhaust pipe while the engine is running or immediately after
turning the engine off.
Doing so may cause burns.
●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 vehi cle. This may lead to death or a seri-
ous health hazard.

145
2-1. Driving procedures
2
When driving
CAUTION
■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 ar ea, 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, result ing 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, lead ing 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.
●The brake system consists of 2 individual hydraulic systems: if one of the systems
fails, the other will still operate. In this case, the brake pedal should be depressed
more firmly than usual and braking distance becomes longer.
Do not drive your vehicle with only a single brake system. Have your brakes fixed
immediately.

171
2-2. Instrument cluster
2
When driving
■Speed indicator display conditions and vehicle speed setting range
Vehicle speed setting range: Approximately 30 to 100 mph (approximately 50 to 160 km/h)
When the maximum speed is selected, the speed indicator comes on only in red.
■Tacho indicator display conditions and engine speed setting range
Engine rpm setting range: Approximately 2000 to 6500 rpm (r/min)
When the maximum rpm is selected, the tacho indicator comes on only in red.
■The brightness of the instrument panel lights
When the headlight switch is turned to on, the brightness will be reduced slightly
unless the control dial is turned fully clockwise.
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 engine may be overheating if the temperature gauge is in the red zone (H). In
this case, immediately stop the vehicle in a safe place, and check the engine after
it has cooled completely. ( P. 5 4 2 )

194
2-3. Operating the lights and windshield wipers
Headlight cleaner switch
■The headlight cleaner can be operated when
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 windshie ld 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 8 7 )
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

375
3-7. Other interior features
3
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 th e 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.
: If equipped

379
3-7. Other interior features
3
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 heaters and ventilators 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 off.

When trouble arises5
485
5-1. Essential informationEmergency flashers............... 486
If your vehicle needs to be towed................................. 487
If you think something is wrong .................................. 493
Fuel pump shut off system.... 494 5-2. Steps to take in an
emergency
If a warning light turns on or a warning buzzer
sounds... ................................. 495
If a warning message is displayed................................ 504
If you have a flat tire (vehicles with standard
tires) ......................................... 518
If you have a flat tire (vehicles with run-flat
tires) ........................................ 527
If the engine will not start .... 529
If the shift lever cannot be shifted from P .................. 531
If you lose your keys .............. 532
If the electronic key does not operate properly.......... 533
If the vehicle battery is discharged......................... 538
If your vehicle overheats ..... 542
If the vehicle becomes stuck........................................ 545
If the retractable hardtop does not close ...................... 547
If your vehicle has to be stopped in an
emergency ............................ 557

542
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.
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.
If the engine compartment
cover needs to be removed:
P. 4 2 4
STEP1
STEP2
STEP3
STEP4