cooling TOYOTA AVALON 2008 XX30 / 3.G Owners Manual

302 4-3. Do-it-yourself maintenance
AVALON_U_(L/O_0802)
CAUTION
■When working near the electric cooling fan or radiator grille
Be sure the “ENGINE START STOP” switch or the engine switch is OFF. 
With the “ENGINE START STOP” switch or the engine switch in 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. 314)
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from
getting in the eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear
due to dirt in the air. Also a backfire could cause a fire in the engine compart-
ment.

306
4-3. Do-it-yourself maintenance
AVALON_U_(L/O_0802)
Engine compar tment
Engine coolant reservoir
(  P. 313)
Power steering fluid 
reservoir ( P. 316)
Engine oil filler cap 
(  P. 309)
Engine oil level dipstick 
(  P. 308)
Brake fluid reservoir 
(  P. 315)Fuse box ( P. 344)
Battery ( P. 318)
Radiator ( P. 314)
Electric cooling fans
Condenser ( P. 314)
Washer fluid tank 
( P. 321)

4
Maintenance and care
313
4-3. Do-it-yourself maintenance
AVALON_U_(L/O_0802)
Engine coolant
The coolant level is satisf actory if it is between the “F” and “L” lines on
the reservoir when the engine is cold.
Reservoir cap
Full
Low
If the level is on or below the “L”
line, add coolant up to the “F” line.
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, coolant reservoir cap, radiator cap, drain
cock and water pump. 
If you cannot find a leak, have your Toyota 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 coolant, contact your Toyota dealer.

314 4-3. Do-it-yourself maintenance
AVALON_U_(L/O_0802)
Radiator and condenserCheck the radiator and condenser and clear any foreign objects. 
If either of the above parts are extr emely dirty or you are not sure of
their condition, have your vehicl e checked by your Toyota 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 the 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 it from damaging to parts or paint.
CAUTION
■When the engine is hot
Do not touch the radiator or condenser, as they may be hot and you may be
burned.

346 4-3. Do-it-yourself maintenance
AVALON_U_(L/O_0802)
Fuse layout and amperage ratings■ Engine compartment
FuseAmpereCircuit
1 RR DEF 50 A Rear window defogger, outside
rear view mirror defogger
2 ABS/VSC No.2 30 A Anti-lock brake system, vehicle
stability control system
3 RDI FAN 50 A Electric cooling fan
4 ABS/VSC No.1 50 A Anti-lock brake system, vehicle
stability control system
5 HEATER 50 A Air conditioning system
6 ST/AM2 30 A Starter system
7 MAIN 40 A Headlights

350 4-3. Do-it-yourself maintenance
AVALON_U_(L/O_0802)
FuseAmpereCircuit
11S-HTR20 AAir conditioning system
12DOOR No.225 AMultiplex communication system
13S/ROOF30 AMoon roof
14TA I L10 A
Parking lights, license plate lights,
tail lights, front and rear side
marker lights
15PA N E L7.5 A
Seat heaters, navigation system,
emergency flashers, 
electronically controlled 
automatic transmission system,
glove box light, instrument panel
lights, power outlets
16ECU IG No.110 A
Center display, shift lock control
system, moon roof, multiplex 
communication system, tire pres-
sure monitoring (warning) system
17ECU IG No.210 A
Anti-lock brake system, dynamic
laser cruise control system, 
automatic headlight leveling 
system, vehicle stability control
system, multiplex 
communication system
18HTR7.5 A
Air conditioning system, 
instrument panel lights, electric
cooling fan
19A/C COMP7.5 AAir conditioning system
20GAUGE No.110 ABack-up lights, navigation 
system, emergency flashers
21WIP30 AWindshield wipers
22RR S/SHADE10 ARear sunshade

400 5-2. Steps to take in an emergency
AVALON_U_(L/O_0802)
NOTICE
■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
401
5-2. Steps to take in an emergency
AVALON_U_(L/O_0802)
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the air condi-
tioning 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. 307)
Check to see if the cooling fan is operating.
If the fan is operating: 
Wait until the engine coolant temperature gauge begins
to fall and then stop the engine.
If the fan is not operating: 
Stop the engine immediately and call your local Toyota
dealer.
After the engine has cooled
down sufficiently, check the
coolant level and inspect the
radiator core (radiator) for any
leaks.STEP1
STEP2
STEP3
STEP4
STEP5

410 6-1. Specifications
AVALON_U_(L/O_0802)
Cooling system
Ignition system
Electrical system
Capacity8.8 qt. (8.3 L, 7.3 lmp.qt.)
Coolant typeUse either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-
silicate, non-amine, non-nitrite, and non-borate
coolant with long-life hybrid organic acid technol-
ogy
Do not use plain water alone.
Spark plug
Make DENSO
FK20HR11
Gap 0.043 in. (1.1 mm)
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine.
Battery
Open voltage at
68 F (20 C):
12.6  12.8 V Fully charged 
12.2  12.4 V Half charged 
11 . 8  12.0 V Discharged 
(Voltage is checked 20 minutes after the engine
and all lights are turned off.)
Charging rates 5A max.

444 Alphabetical index
AVALON_U_(L/O_0802)
Child safetyAirbag precautions ..................88
Child-protectors ....................... 41
Child restraint syst em..............99
How your child should wear 
the seatbelt ...........................57
Installing child restraints ........ 102
Moon roof ................................71
Power window lock switch....... 66
Power window precautions .....68
Removed key battery 
precautions .........................342
Seat belt comfort guide ........... 55
Seat belt precautions ..............58
Seat heater precautions ........ 271
Trunk .......................................45
Cleaning Exterior .................................. 288
Interior ...................................291
Seat belts ..............................292
Climate control seat.................270
Clock ......................................... 265
Compass ...................................283
Condenser ................................314
Console box ............................. 257
Cooling system Engine overheating ............... 401
Cruise control
Cruise control ........................149
Dynamic laser cruise 
control .................................152
Cup holders ..............................261
Curtain shield airbags ............... 82
Customizable features............. 429
Daytime running light 
system .................................... 144
Defogger Rear window .........................187
Side mirror............................. 187
Dimension.................................406
Dinghy towing .......................... 176 Display
Trip information ..................... 142
Do-it-yourself maintenance .... 300
Door pocket .............................. 262
Doors Door lock ........................... 24, 35
Rear door child-protector ........ 41
Driver’s seat belt reminder 
light ......................................... 373
Driving Break-in tips .......................... 115
Correct posture ....................... 80
Procedures............................ 114
Winter driving tips ................. 170
Electronic key If the electronic key does not 
operate properly ................. 395
Emergency, in case of If a warning light turns on ...... 370
If the electronic key does not 
operate properly ................. 395
If the engine will not start ...... 391
If the shift lever cannot be 
shifted from P ..................... 393
If the battery is discharged ... 397
If the warning buzzer 
sounds ................................ 370
If the warning light 
turns on............................... 370
If you have a flat tire ............. 382
If you lose your keys ............. 394
If you think something is 
wrong .................................. 366
If your vehicle becomes 
stuck ................................... 404
If your vehicle needs to be 
towed .................................. 362
If your vehicle overheats ....... 401
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