cooling Lexus ES350 2008 Owner's Manual

296
4-3. Do-it-yourself maintenance
ES350_U_(L/O_0708)
CAUTION
The engine compartment contains many mechanisms and fluids that may move sud-
denly, become hot, or become electrically energized. To avoid death or serious injury.
■When working on the engine compartment:
●Keep hands, clothing, and tools away from the moving fan and engine drive belt.
●Be careful not to touch the engine, radiator, exhaust manifold, etc. right after driv-
ing as they may be hot. Oil and other fluids may also be hot.
●Do not leave anything that may burn easily, such as paper or rags, in the engine
compartment.
●Do not smoke, cause sparks or expose an open flame to fuel or the battery. Fuel
and battery fumes are flammable.
●Be extremely cautious when working on the battery. It contains poisonous and
corrosive sulfuric acid.
●Take care because brake fluid can harm your hands or eyes and damage painted
surfaces.
If fluid gets on your hands or in your eyes, flush the affected area with clean water
immediately.
If you still experience discomfort, see a doctor.
■When working near the electric cooling fan or radiator grille:
Be sure the “ENGINE START STOP” switch is OFF.
With the “ENGINE START STOP” switch in IGNITION ON mode, the electric
cooling fan may automatically start to run if the air conditioning is on and/or the
coolant temperature is high.
(→ P. 3 0 9 )
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from getting
in the eyes.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
ES350_U_(L/O_0708)
Engine compartment
Power steering fluid reservoir(→P. 310)
Engine oil filler cap (→P. 304)
Engine oil level dipstick (→P. 303)
Brake fluid reservoir (→P. 309)
Battery ( →P. 312)Fuse box ( →P. 3 3 4 )
Electric cooling fans
Condenser ( →P. 309)
Radiator ( →P. 309)
Washer fluid tank (→P. 315)
Engine coolant reservoir (→P. 3 0 7 )

308
4-3. Do-it-yourself maintenance
ES350_U_(L/O_0708)
■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.USA: “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 burns or other injuries.
NOTICE
■When adding engine coolant
Coolant is neither plain water not straight antifreeze. The correct mixture of water
and anti freeze 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.

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4-3. Do-it-yourself maintenance
ES350_U_(L/O_0708)
Fuse layout and amperage ratings■ Engine compartment
FuseAmpereCircuit
1PSB30 APre-collision seat belt
2H-LP CLN30 A
3P-P / SEAT30 APo w e r s e a t
4RR DEF50 ARear window defogger
5ABS NO.230 AAnti-lock brake system, vehicle stabil-
ity control system
6FAN MAIN50 AElectric cooling fans
7ABS NO.150 AAnti-lock brake system, vehicle stabil-
ity control system
8HTR50 AAir conditioning system
9RR FOG10 A
10ALT-CDS10 AAlternator condenser
11ST30 AStarting system

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4-3. Do-it-yourself maintenance
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15ECU-IG NO. 110 A
Moon roof, seat heaters, power win-
dows, clock, automatic windshield
wiper, electric cooling fans, driving
position memory system, seat position
memory system
16ECU-IG NO. 27. 5 A
Anti-lock brake system, vehicle stabil-
ity control system, traction control sys-
tem, brake assist system, cruise
control system, stop lights, shift lock
control system
17A/C NO. 210 AAir conditioning system, rear window
defogger
18WA S H10 AWindshield washer
19S-HTR20 ASeat heaters, air conditioning system
20GAUGE NO. 110 AEmergency flashers, back-up lights,
rear sunshade, charging system
21WIP25 AWindshield wipers
22H - L P LV L7. 5 AHeadlight leveling system
23IGN10 A
Multiport fuel injection system/
sequential multiport fuel injection sys-
tem, SRS airbag system, steering lock
system
24GAUGE NO. 27. 5 AMeters
25ECU-ACC7. 5 AClock, main body ECU
26CIG20 ACigarette lighter
27PWR OUTLET20 APower outlet
28RADIO NO. 27. 5 AAudio system
29MIR HTR15 AOutside rear view mirror defoggers
FuseAmpereCircuit

402
5-2. Steps to take in an emergency
ES350_U_(L/O_0708)
CAUTION
■Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while related parts
contain lead and lead compounds. Observe the following precautions when han-
dling the battery.
●When working with the battery, always wear safety glasses and take care not to
allow any battery fluids (acid) to come into contact with skin, clothing or the vehi-
cle body.
●Do not lean over the battery.
●In the event that battery fluid comes into contact with the skin or eyes, immedi-
ately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention can be
received.
●Always wash your hands after handling the battery support, terminals, and other
battery-related parts.
●Do not allow children near the battery.
NOTICE
■To prevent damaging the vehicle
Do not pull- or push-start the vehicle, because the three-way catalytic converter
may overheat and become a fire hazard.
■When handling jumper cables
Be careful that the jumper cables do not become tangled in the cooling fan or any
of the belts when connecting or disconnecting them.

5
When trouble arises
403
5-2. Steps to take in an emergency
ES350_U_(L/O_0708)
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 and carefully lift the hood.
If you do not see steam: Leave the engine running and carefully lift the hood.
Remove the engine compartment cover. ( →P. 302)
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.
Add engine coolant if required.
Water can be used in an emer-
gency measure if engine coolant
is unavailable. (→P. 4 1 2 )
STEP1
STEP2
STEP3
STEP4
STEP5
STEP6

412
6-1. Specifications
ES350_U_(L/O_0708)
Cooling system
Ignition system
Capacity9. 5 q t .
(9.0 L, 7.9 lmp.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 organic acid technology
Do not use plain water alone.
Spark plug
Make DENSO
Gap
FK20HR11
0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only above spark plugs. Do not adjust gaps for your engine performance or
smooth driveability.

445
Alphabetical index
ES350_U_(L/O_0708)
Brake assist .............................................. 157
Break-in tips ............................................. 107
CareExterior ................................................... 282
Interior..................................................... 285
Seat belts ............................................... 286
Cargo capacity ....................................... 163
Cargo hooks ...........................................270
CD changer ............................................. 199
CD player.................................................. 199
Chains......................................................... 169
Child restraint system Booster seats, definition.................... 93
Booster seats, installation ..................97
Convertible seats, definition ........... 93
Convertible seats, installation .........97
Front passenger occupant
classification system ........................ 88
Infant seats, definition ......................... 93
Infant seats, installation........................97
Installing CRS with lower
anchorages ........................................ 100
Installing CRS with seatbelts ...........97
Installing CRS with top straps ........ 101
Child safety
Airbag precautions ............................. 83
Battery precautions................ 314, 402
Child restraint system ........................ 93
Child-protectors................................... 38
How your child should wear the seatbelt ........................................... 53
Installing child restraints .................... 96
Moon roof precautions ..................... 66 Power window lock switch ..............60
Power window precautions ............ 62
Removed electronic key battery
precautions........................................333
Seat belt comfort guide .......................51
Seat belt extender precautions......55
Seat belt precautions .......................... 54
Seat heater precautions.................. 263
Trunk precautions................................. 42
Child-protectors ......................................38
Cigarette lighter..................................... 261
Cleaning
Exterior....................................................282
Interior .................................................... 285
Seat belts ............................................... 286
Clock ......................................................... 259
Compass .................................................. 277
Condenser ..............................................309
Console box ............................................ 251
Cooling system
Engine overheating.......................... 403
Cornering assist sensors ......................151
Cruise control Cruise control....................................... 139
Dynamic radar cruise control........142
Cup holders ............................................ 254
Curtain shield airbags.............................77
Customizable features .......................433
Daytime running light system ........... 133
Defogger Rear window ......................................... 189
Side mirror.............................................. 189
Dimension............................................... 408
Dinghy towing ......................................... 180
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