2012 Lexus IS F radiator

403
4-3. Do-it-yourself maintenance
4
Maintenance and care
IS F_U
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, coolant reservoir cap, drain cock and water
pump.
If you cannot find a leak, have your Lexus dealer test the cap and check for leaks in
the cooling system.
■Coolant selection
Only use “Toyota Super Long Life Coolant” or similar high-quality ethylene glycol-
based non-silicate, non-amine, non-nitrite, and non-borate coolant with long-life
hybrid organic acid technology.U.S.A.: “Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deionized water. (Enabled: -31 °F [-35 °C])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45%
deionized water. (Enabled: -44 °F [-42 °C])
For more details about engine coolant, contact your Lexus dealer.
CAUTION
■When the engine is hot
Do not remove the coolant reservoir cap.
The cooling system may be under pressure and may spray hot coolant if the cap is
removed, causing serious injuries, such as burns.
NOTICE
■When adding engine coolant
Coolant is neither plain water nor straight antifreeze. The correct mixture of water
and antifreeze must be used to provide proper lubrication, corrosion protection
and cooling. Be sure to read the antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to prevent damage to parts or paint.

404
4-3. Do-it-yourself maintenance
IS F_U
Radiator and condenserCheck the radiator and condenser, and clear any foreign objects.
If either of the above parts are extremely dirty or you are not sure of their
condition, have your vehicle checked by your Lexus dealer.
Brake fluid■ Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.
CAUTION
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and cause serious inju-
ries, such as burns.

5
When trouble arises
505
5-2. Steps to take in an emergency
IS F_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.
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.
If the engine compartment
cover needs to be removed:
→P. 3 9 7
STEP1
STEP2
STEP3
STEP4

506
5-2. Steps to take in an emergency
IS F_U
■Overheating
If you observe the following, your vehicle may be overheating.
●The display on the engine coolant temperature gauge flashes 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. 5 1 7 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP5

568
Alphabetical index
IS F_U
Radar cruise control ..............................177
Radiator ....................................................404
Radio* ........................................................ 233
RDS* ..........................................................235
Rear turn signal lightsReplacing light bulbs........................ 447
Wattage.................................................. 522
Rear view mirror
Compass ...............................................365
Rear window defogger* ....................228
Replacing Electronic key battery...................... 429
Fuses .......................................................... 431
Light bulbs............................................. 447
Reporting safety defects for U.S. owners ..........................................546
Reset the maintenance data............ 385
Safety connect .......................................369
Seat belts Adjusting the seat belt........................ 65
Automatic locking retractor............ 66
Child restraint system installation ............................................. 115
Cleaning and maintaining the seat belts ..................................... 382
Emergency locking retractor ......... 66
How to wear your seat belt............. 64
How your child should wear the seat belt .......................................... 67
Pregnant women, proper seat belt use......................... 66
Reminder light ..................................... 466
Seat belt extenders .............................. 67
Seat belt pretensioners...................... 65 Seat heaters ............................................ 349
Seat position memory............................ 59
Seating capacity......................................213
Seats
Adjustment ...............................................54
Adjustment precautions ....................54
Child seats/child restraint system installation ..............................115
Cleaning .................................................. 381
Driver’s seat position memory ...... 55
Front passenger seat position memory ................................................. 59
Head restraints ........................................ 61
Properly sitting in the seat................. 92
Seat heaters ......................................... 349
Service reminder indicators .............154
Shift lever If the shift lever cannot be
shifted from P....................................497
Transmission.......................................... 138
Shift lever light ....................................... 330
Shift lock system.................................... 497
Shopping bag hooks ........................... 356
Side airbags ............................................... 94
Side marker lights Switch........................................................ 162
Side mirrors Adjusting and folding .......................... 74
Mirror position memory ................... 55
Smart access system with
push-button start Entry function .......................................... 32
Starting the engine.............................. 134
“SOS” button.......................................... 369R
S