engine coolant Lexus IS250 2010 User Guide

512
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. 4 0 2 )
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

5
When trouble arises
513
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 2 4 )
Have the vehicle checked at your nearest Lexus dealer as soon as pos-
sible.
STEP6

514
5-2. Steps to take in an emergency
IS350/250_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.

524
6-1. Specifications
IS350/250_U
Cooling system
Ignition system
Capacity9.6 q t .
(9.1 L, 8.0 Imp. qt.)
Coolant type
Use either of the following.
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-sili-
cate, non-amine, non-nitrite, and non-borate cool-
ant with long-life hybrid organic acid technology
Do not use plain water alone.
Spark plug
Make
GapDENSO FK20HBR11
0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning the engine.

542
6-1. Specifications
IS350/250_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. 109.
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

567
Alphabetical index
IS350/250_U
Engine compartment cover............. 402
Engine coolantCapacity................................................. 524
Checking ............................................... 406
Preparing and checking before winter ...................................... 210
Engine coolant temperature gauge ........................................................ 151
Engine immobilizer system ................. 86
Engine oil Capacity................................................. 522
Checking ............................................... 403
Preparing and checking before winter ...................................... 210
Engine oil maintenance data ........... 405
EPS............................................................... 196
Event data recorder.............................469
First-aid kit storage belt..................... 360
Floor mat.................................................. 359
Fluid Brake .......................................................408
Washer ..................................................... 413
Fog lights
Switch ........................................................168
Wattage ................................................. 533
Footwell lights........................................ 329
Front fog lights Switch ........................................................168
Wattage ................................................. 533 Front passenger occupant
classification system .......................... 104
Front passenger's seat belt reminder light...................................... 473
Front seats Adjustment .................................................51
Driving position memory ..................53
Seat position memory ........................ 57
Front turn signal lights Switch.........................................................147
Wattage ................................................. 533
Fuel
Capacity .................................................. 521
Fuel gauge................................................ 151
Fuel pump shut off system............ 468
Gas station information ..................576
Information ............................................534
Refueling....................................................83
Fuel door .....................................................83
Fuel filler door ...........................................83
Fuel pump shut off system.................468
Fuses .......................................................... 436
Garage door opener ..........................363
Gas station information...................... 576
Gauges ........................................................151
Glove box ................................................333
Glove box light ...................................... 334
F
G

574
IS350/250_U
What to do if...
What to do if...
A tire puncturesP. 4 9 2If you have a flat tire
The engine does not start
P. 5 0 1If the engine will not start
P. 8 6Engine immobilizer system
P. 5 0 5If the vehicle battery is discharged
The shift lever cannot be
moved out of PP. 5 0 3If 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 1 2If your vehicle overheats
The key is lostP. 5 0 4If you lose your keys
The battery runs outP. 5 0 9If the vehicle battery is discharged
The doors cannot be lockedP. 4 3Doors
The horn begins to soundP. 8 8Alarm
The vehicle is stuck in mud or
sandP. 5 1 5If the vehicle becomes stuck