2021 TOYOTA AVALON HYBRID overheating

1012. Instrument cluster
2
Instrument cluster
■Engine speed
On hybrid vehicles, engine speed is precisely controlled in order to help
improve fuel efficiency and reduce exhaust emissions etc.
There are times when the engine speed that is displayed may differ even
when vehicle operation and driving conditions are the same.
■Outside temperature display
In the following situations, the correct outside temperature may not be dis-
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●When stopped, or driving at low speeds (less than 16 mph [25 km/h])
●When the outside temperature has changed suddenly (at the entrance/exit
of a garage, tunnel, etc.)
●When “” or “E” is displayed, the system may be malfunctioning.
Take your vehicle to your Toyota dealer.
NOTICE
■To prevent damage to the engine and its components
The engine may be overheating if the engine coolant temperature gauge is
in the red zone (H). In this case, immediately stop the vehicle in a safe
place, and check the engine after it has cooled completely. (P. 494)

1884-1. Before driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When the vehicle is parked
●Do not leave a door or window open if the curved glass is coated with a
metallized film such as a silver-colored one. Reflected sunlight may cause
the glass to act as a lens, causing a fire.
●Always apply the parking brake, shift the shift lever to P, stop the hybrid
system and lock the vehicle.
Do not leave the vehicle unattended while the “READY” indicator is illumi-
nated.
If the vehicle is parked with the shift lever in P but the parking brake is not
set, the vehicle may start to move, possibly leading to an accident.
●Do not touch the exhaust pipes while the “READY” indicator is illuminated
or immediately after turning the hybrid system off.
Doing so may cause burns.
■When taking a nap in the vehicle
Always turn the hybrid system off. Otherwise, if you accidentally move the
shift lever or depress the accelerator pedal, this could cause an accident or
fire due to hybrid system overheating. Additionally, if the vehicle is parked in
a poorly ventilated area, exhaust gases may collect and enter the vehicle,
leading to death or a serious health hazard.
■When braking
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause
one side of the vehicle to brake differently than the other side. Also, the
parking brake may not securely hold the vehicle.
●If the electronically controlled brake system does not operate, do not fol-
low other vehicles closely and avoid hills or sharp turns that require brak-
ing.
In this case, braking is still possible, but the brake pedal should be
depressed more firmly than usual. Also, the braking distance will increase.
Have your brakes fixed immediately.
●The brake system consists of 2 or more individual hydraulic systems; if
one of the systems fails, the other(s) will still operate. In this case, the
brake pedal should be depressed more firmly than usual and the braking
distance will increase. Have your brakes fixed immediately.

1994-2. Driving procedures
4
Driving
●If a message related to start-up is shown on the multi-information display,
read the message and follow the instructions.
■Steering lock
After turning the power switch off and opening and closing the doors, the
steering wheel will be locked due to the steering lock function. Operating the
power switch again automatically cancels the steering lock.
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be sus-
pended if the hybrid system is turned on and off repeatedly in a short period
of time. In this case, refrain from operating the hybrid system. After about 10
seconds, the steering lock motor will resume functioning.
■When a message requesting the smart key system be inspected is dis-
played on the multi-information display
The system may be malfunctioning. Have the vehicle inspected by your
Toyota dealer immediately.
■If the “READY” indicator does not come on
In the event that the “READY” indicator does not come on even after perform-
ing the proper procedures for starting the vehicle, contact your Toyota dealer
immediately.
■If the hybrid system is malfunctioning
P. 80
■If the electronic key battery is depleted
P. 439
■Operation of the power switch
●If the switch is not pressed shortly and firmly, the power switch mode may
not change or the hybrid system may not start.
●If attempting to restart the hybrid system immediately after turning the power
switch off, the hybrid system may not start in some cases. After turning the
power switch off, wait a few seconds before restarting the hybrid system.
■If the smart key system has been deactivated in a customized setting
P. 484 A message informing the driver that the
steering wheel is locked will be displayed
on the multi-information display.
Check that the shift lever is set in P. Press
the power switch while turning the steer-
ing wheel left and right.

2144-2. Driving procedures
■Parking the vehicle
P. 182
■Parking brake operation
●When the power switch is not in ON mode, the parking brake cannot be
released using the parking brake switch.
●When the power switch is not in ON mode, automatic mode (automatic
brake setting and releasing) is not available.
■Automatic release function
The parking brake is automatically released when slowly depress the acceler-
ator pedal.
The parking brake will be released automatically under the following condi-
tions:
●The driver’s door is closed.
●The driver’s seat belt is fastened.
●Shift the shift lever is in a forward or reverse position.
●The malfunction indicator lamp or brake system warning light is not illumi-
nated.
If the automatic release function does not operate, manually release the park-
ing brake.
■If “Parking Brake Temporarily Unavailable” is displayed on the multi-
information display
If the parking brake is operated repeatedly over a short period of time, the
system may restrict operation to prevent overheating. If this happens, refrain
from operating the parking brake. Normal operation will return after about 1
minute.
■If “Parking Brake Unavailable” is displayed on the multi-information dis-
play
Operate the parking brake switch. If the message does not disappear after
operating the switch several times, the system may be malfunctioning. Have
the vehicle inspected by your Toyota dealer immediately.
■Parking brake operation sound
When the parking brake operates, a motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
■Parking brake indicator light and parking brake light
●Depending on the power switch mode, the parking brake indicator light and
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ON mode: Comes on until the parking brake is released.
Not in ON mode: Stays on for approximately 15 seconds.
●When the power switch is turned off with the parking brake set, the parking
brake indicator light and parking brake light will stay on for about 15 sec-
onds. This does not indicate a malfunction.

2154-2. Driving procedures
4
Driving
■Parking brake engaged warning buzzer
A buzzer will sound if the vehicle is driven with the parking brake engaged.
“Release Parking Brake” is displayed on the multi-information display.
■Warning messages and buzzers
Warning messages and buzzers are used to indicate a system malfunction or
to inform the driver of the need for caution. If a warning message is shown on
the multi-information display, read the message and follow the instructions.
■If the brake system warning light comes on
P. 455
■Usage in winter time
P. 333
WARNING
■When parking the vehicle
Do not leave a child in the vehicle alone. The parking brake may be
released unintentionally and there is the danger of the vehicle moving that
may lead to an accident resulting in death or serious injury.
■Parking brake switch
Do not set any objects near the parking brake switch. Objects may interfere
with the switch and may lead the parking brake to unexpectedly operate.
NOTICE
■When parking the vehicle
Before you leave the vehicle, shift the shift lever to P, set the parking brake
and make sure that the vehicle does not move.
■When the system malfunctions
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■When the parking brake cannot be released due to a malfunction
Driving the vehicle with the parking brake set will lead to brake components
overheating, which may affect braking performance and increase brake
wear. Contact your Toyota dealer immediately if this occurs.

3274-5. Using the driving support systems
4
Driving
■Automatic reactivation of TRAC and VSC systems
After turning the TRAC and VSC systems off, the systems will be automati-
cally re-enabled in the following situations:
●When the power switch is turned off
●If only the TRAC system is turned off, the TRAC will turn on when vehicle
speed increases
If both the TRAC and VSC systems are turned off, automatic re-enabling will
not occur when vehicle speed increases
■Secondary Collision Brake operating conditions
The system operates when the SRS airbag sensor detects a collision while
the vehicle is in motion.
However, the system does not operate in any of the following situations.
●The vehicle speed is below 6 mph (10 km/h)
●Components are damaged
■Secondary Collision Brake automatic cancellation
The system is automatically canceled in any of the following situations.
●The vehicle speed drops below approximately 6 mph (10 km/h)
●A certain amount of time elapses during operation
●The accelerator pedal is depressed a large amount
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from
overheating when there is frequent steering input over an extended period of
time. The steering wheel may feel heavy as a result. Should this occur, refrain
from excessive steering input or stop the vehicle and turn the hybrid system
off. The EPS system should return to normal within 10 minutes.

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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3
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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
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