2014 Lexus IS250C engine coolant

424
4-3. Do-it-yourself maintenance
IS250C/350C_U
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, engine coolant filler cap, radiator cap, drain cock
and water pump.
If you cannot find a leak, have your Lexus dealer pressure 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 radiator 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 it damaging parts or paint.

5
When trouble arises
489
5-1. Essential information
IS250C/350C_U
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably needs
adjustment or repair. Contact your Lexus dealer as soon as possible.
■Visible symptoms
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal.)
● Flat-looking tires or uneven tire wear
● Engine coolant temperature gauge needle continually points
higher than normal
■ Audible symptoms
●Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
●Engine missing, stumbling or running rough
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, sp ongy feeling, pedal almost touches
the floor

536
5-2. Steps to take in an emergency
IS250C/350C_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 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 1 8
STEP1
STEP2
STEP3
STEP4

5
When trouble arises
537
5-2. Steps to take in an emergency
IS250C/350C_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 fan 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 measure if engine coolant
is unavailable. (→P. 5 5 9 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP5

538
5-2. Steps to take in an emergency
IS250C/350C_U
NOTICE
■When adding engine coolant
Wait until the engine has cooled down before adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too quickly
can cause damage to the engine.

579
6-1. Specifications
6
Vehicle specifications
IS250C/350C_U■
Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing
the tire's resistance to the generation of heat and its ability to dissipate
heat when tested under controlled conditions on a specified indoor
laboratory test wheel.
Sustained high temperature can cause the material of the tire to degenerate
and reduce tire life, and excessive temperature can lead to sudden tire fail-
ure.
The grade C corresponds to a level of performance which all passenger car
tires must meet under the Federal Motor Vehicle Safety Standard No. 139.
Grades B and A represent higher levels of performance on the laboratory
test wheel than the minimum required by law.
Warning: The temperature grades for this tire are established for a tire that
is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic transmis-
sion, power steering, power brakes, power windows,
power seats, radio and heater, to the extent that these
items are available as factory-installed equipment
(whether installed or not)
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil and
coolant, and if so equipped, air conditioning and
additional weight optional engine

613
Alphabetical index
IS250C/350C_U
Electric power steering ....................... 214
Electronic keyIf the electronic key does not operate properly ............................ 528
Emergency, in case of If a warning message is
displayed ........................................... 500
If the electronic key does not
operate properly ............................ 528
If the engine will not start ............... 524
If the retractable hardtop does not close .................................540
If the shift lever cannot be shifted from P ................................... 526
If the vehicle has a discharged battery.................................................. 532
If the warning buzzer sounds........ 491
If the warning light turns on ............ 491
If you have a flat tire ..........................513
If you lose your keys .........................527
If you think something is wrong................................................... 489
If your vehicle becomes stuck .... 539
If your vehicle has to be stopped in an emergency .........550
If your vehicle needs to be
towed ................................................... 483
If your vehicle overheats................ 536
Emergency flashers Switch ...................................................... 482 Engine
Compartment....................................... 416
Engine switch ......................................... 147
Hood ......................................................... 413
How to start the engine ....................147
Identification number ...................... 553
If the engine will not start................524
Ignition switch ........................................ 147
Overheating ........................................ 536
Engine compartment cover .............. 418
Engine coolant Capacity ................................................ 559
Checking ............................................... 423
Preparing and checking
before winter ....................................233
Engine coolant temperature
gauge......................................................... 161
Engine immobilizer system..................98
Engine oil Capacity ................................................ 556
Checking ...............................................420
Preparing and checking
before winter ....................................233
EPS .............................................................. 214
Event data recorder ............................... 22E
*: For vehicles with a navigation system, refer to the “Navigation System Owner’s Manual”.

622
IS250C/350C_U
What to do if...
What to do if...
A tire puncturesP. 5 1 3
P. 5 2 2If you have a flat tire
The engine does not start
P. 5 2 4If the engine will not start
P. 9 8Engine immobilizer system
P. 5 3 2If the vehicle battery is discharged
The shift lever cannot be
moved outP. 5 2 6If 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 3 6If your vehicle overheats
The key is lostP. 5 2 7If you lose your keys
The battery runs outP. 5 3 2If the vehicle battery is discharged
The doors cannot be lockedP. 4 7Doors
The horn begins to soundP. 1 0 0Alarm
The vehicle is stuck in mud or
sandP. 5 3 9If the vehicle becomes stuck
A warning message is displayedP. 5 0 0If a warning message is displayed