2021 TOYOTA AVALON HYBRID cooling

4947-2. Steps to take in an emergency
■If the needle of the engine coolant temperature gauge enters
the red zone or “Engine Coolant Temp High Stop in a Safe
Place See Owner’s Manual” is shown on the multi-information
display
Stop the vehicle in a safe place and turn off the air conditioning sys-
tem, and then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently,
inspect the hoses and radiator
core (radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge (P. 98)
enters the red zone or a loss of hybrid system power is experi-
enced. (For example, the vehicle speed does not increase.)
●“Engine Coolant Temp High Stop in a Safe Place See Owner’s
Manual” or “Hybrid System Overheated Output Power Reduced”
is shown on the multi-information display
●Steam comes out from under the hood.
Correction procedures
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4957-2. Steps to take in an emergency
7
When trouble arises
The coolant level is satisfactory
if it is between the “F” and “L”
lines on the reservoir.
Reservoir
“F” line
“L” line
Radiator cap
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the hybrid system and turn the air conditioning system on to
check that the radiator cooling fan operates and to check for cool-
ant leaks from the radiator or hoses.
The fan operates when the air conditioning system is turned on immedi-
ately after a cold start. Confirm that the fan is operating by checking the fan
sound and air flow. If it is difficult to check these, turn the air conditioning
system on and off repeatedly. (The fan may not operate in freezing tem-
peratures.)
If the fan is not operating:
Stop the hybrid system immediately and contact your Toyota dealer.
If the fan is operating:
Have the vehicle inspected at the nearest Toyota dealer.
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4967-2. Steps to take in an emergency
■If “Hybrid System Overheated Output Power Reduced” is
shown on the multi-information display
Stop the vehicle in a safe place.
Stop the hybrid system and carefully lift the hood.
After the hybrid system has
cooled down, inspect the
hoses and radiator core
(radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant
leaks, immediately contact
your Toyota dealer.
The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.
Reservoir
“FULL”
“LOW”
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
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4977-2. Steps to take in an emergency
7
When trouble arises
After stopping the hybrid system and waiting for 5 minutes or
more, start the hybrid system again and check for the multi-infor-
mation display.
If the message does not disappear:
Stop the hybrid system and contact your Toyota dealer.
If the message is not displayed:
The hybrid system temperature has dropped and the vehicle
may be driven normally.
However, if the message appears again frequently, contact your To y o t a
dealer.
WARNING
■To prevent an accident or injury when inspecting under the hood of
your vehicle
Observe the following precautions.
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●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.
●After the hybrid system has been turned off, check that the “READY” indi-
cator is off. When the hybrid system is operating, the gasoline engine may
automatically start, or the cooling fan may suddenly operate even if the
gasoline engine stops. Do not touch or approach rotating parts such as the
fan, which may lead to fingers or clothing (especially a tie, a scarf or a muf-
fler) getting caught, resulting in serious injury.
●Do not loosen the radiator cap and the coolant reservoir cap while the
hybrid system and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine/power control unit coolant
Wait until the hybrid system has cooled down before adding engine/power
control unit coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot hybrid sys-
tem too quickly can cause damage to the hybrid system.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
●Do not use any coolant additives.
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5068-1. Specifications
How to read oil container label:
API registered mark is added to
some oil containers to help you
select the oil you should use.
Cooling system
Capacity
(Reference)
Gasoline engine
6.4 qt. (6.1 L, 5.4 Imp. qt.)
Power control unit
1.9 qt. (1.8 L, 1.6 Imp. 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 technology
Do not use plain water alone.
Ignition system
Spark plug
MakeDENSO FC16HR-Q8
Gap0.031 in. (0.8 mm)
NOTICE
■Iridium-tipped spark plugs
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546Alphabetical index
Child safety ................................ 53
12-volt battery
precautions ................. 413, 492
Airbag precautions .................. 37
Battery precautions ....... 413, 492
Child restraint system ............. 54
How your child should wear
the seat belt .......................... 30
Installing child restraints ......... 58
Moon roof precautions .......... 180
Power window lock switch .... 173
Power window precautions ... 176
Rear door child-protectors .... 141
Removed electronic key
battery precautions ............. 440
Seat belt extender
precautions ........................... 33
Seat belt precautions .............. 32
Seat heater precautions........ 349
Trunk precautions ................. 146
Child-protectors....................... 141
Cleaning ........................... 386, 389
Exterior ................................. 386
Interior................................... 389
Seat belts .............................. 390
Wheels and wheel
ornaments .......................... 387
Coat hooks ............................... 376
Condenser ................................ 408
Connected Services
*
Console box ............................. 356
Consumption
screen............................. 106, 128
Coolant
Capacity ................................ 506
Checking ............................... 407
Preparing and checking
before winter....................... 333
Cooling system ........................ 407
Hybrid system
overheating......................... 494
Cornering lights ....................... 219Cruise control
Dynamic radar cruise control
with full-speed range .......... 263
Cup holders ............................. 358
Curtain shield airbags............... 35
Customizable features ............ 526
Daytime running light
system.................................... 219
Defogger
Outside rear view mirrors ..... 343
Rear window ......................... 343
Windshield ............................ 343
Dimensions .............................. 502
Dinghy towing.......................... 195
Display
Dynamic radar cruise control
with full-speed range .......... 263
LDA (Lane Departure Alert
with steering control) .......... 258
Multi-information display ....... 102
Warning messages ............... 465
Do-it-yourself maintenance .... 399
Door courtesy lights
Location ................................ 352
Wattage ................................ 509
Door lock
Doors .................................... 138
Smart key system ................. 138
Wireless remote control ........ 138
Doors ........................................ 138
Automatic door locking
and unlocking systems ....... 141
Door lock .............................. 140
Outside rear view mirrors ..... 170
Rear door child-protector ...... 141
Side doors ............................ 138
Side windows........................ 173
Drive-Start Control .................. 184
Driver’s seat belt
reminder light ........................ 458
D