2021 TOYOTA AVALON HYBRID engine overheat

15Pictorial index
Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 226
Precautions for winter season . . . . . . . . . . . . . . . . . . . . . . . . . P. 333
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 230
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 230
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 504
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 415
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . P. 508
Winter tires/tire chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 333
Checking/rotation/tire pressure warning system . . . . . . . . .P. 415
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 471
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 401
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 401
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 505
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 494
Front turn signal lights/parking lights . . . . . . . . . . . . . P. 211, 218
Headlights/daytime running lights . . . . . . . . . . . . . . . . . . . . P. 218
Front side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 218
Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 218
Front turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 211
Daytime running lights/parking lights . . . . . . . . . . . . . . . . . P. 218
Front turn signal lights/cornering light . . . . . . . . . . . . P. 211, 218
Side turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 211
Rear turn signal lights/ rear side marker lights/
tail lights/stoplights . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 211, 218
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 205
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 218
4
5
6
7
Light bulbs of the exterior lights for driving
(Replacing method: P. 445, Watts: P. 509)
8
9
10
11
12
13
14
15
16
17
*: If equipped

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)

1854-1. Before driving
4
Driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When starting the vehicle
Always keep your foot on the brake pedal while stopped with the “READY”
indicator is illuminated. This prevents the vehicle from creeping.
■When driving the vehicle
●Do not drive if you are unfamiliar with the location of the brake and accel-
erator pedals to avoid depressing the wrong pedal.
• Accidentally depressing the accelerator pedal instead of the brake
pedal will result in sudden acceleration that may lead to an accident.
• When backing up, you may twist your body around, leading to a diffi-
culty in operating the pedals. Make sure to operate the pedals properly.
• Make sure to keep a correct driving posture even when moving the
vehicle only slightly. This allows you to depress the brake and accelera-
tor pedals properly.
• Depress the brake pedal using your right foot. Depressing the brake
pedal using your left foot may delay response in an emergency, result-
ing in an accident.
●The driver should pay extra attention to pedestrians when the vehicle is
powered only by the electric motor (traction motor). As there is no engine
noise, the pedestrians may misjudge the vehicle’s movement.
●Do not drive the vehicle over or stop the vehicle near flammable materials.
The exhaust system and exhaust gases can be extremely hot. These hot
parts may cause a fire if there is any flammable material nearby.
●During normal driving, do not turn off the hybrid system. Turning the hybrid
system off while driving will not cause loss of steering or braking control,
however, power assist to the steering will be lost. This will make it more
difficult to steer smoothly, so you should pull over and stop the vehicle as
soon as it is safe to do so.
In the event of an emergency, such as if it becomes impossible to stop the
vehicle in the normal way: P. 449
●Use engine braking (downshift) to maintain a safe speed when driving
down a steep hill.
Using the brakes continuously may cause the brakes to overheat and lose
effectiveness. (P. 206)
●Do not adjust the display, the positions of the steering wheel, the seat, or
the inside or outside rear view mirrors while driving.
Doing so may result in a loss of vehicle control.
●Always check that all passengers’ arms, heads or other parts of their body
are not outside the vehicle.

1874-1. Before driving
4
Driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■If you hear a squealing or scraping noise (brake pad wear limit indica-
tors)
Have the brake pads checked and replaced by your Toyota dealer as soon
as possible.
Rotor damage may result if the pads are not replaced when needed.
It is dangerous to drive the vehicle when the wear limits of the brake pads
and/or those of the brake discs are exceeded.
■When the vehicle is stopped
●Do not depress the accelerator pedal unnecessarily.
If the shift lever is in any position other than P or N, the vehicle may accel-
erate suddenly and unexpectedly, causing an accident.
●In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while stopped with the “READY” indicator is
illuminated, and apply the parking brake as necessary.
●If the vehicle is stopped on an incline, in order to prevent accidents caused
by the vehicle rolling forward or backward, always depress the brake pedal
and securely apply the parking brake as needed.
●Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause
the exhaust system to overheat, which could result in a fire if combustible
material is nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters, spray cans, or soft drink cans in
the vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a
fire.
• The temperature inside the vehicle may cause the plastic lenses and
plastic material of glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray over the
interior of the vehicle, and may also cause a short circuit in the vehicle’s
electrical components.
●Do not leave cigarette lighters in the vehicle. If a cigarette lighter is in a
place such as the glove box or on the floor, it may be lit accidentally when
luggage is loaded or the seat is adjusted, causing a fire.
●Do not attach adhesive discs to the windshield or windows. Do not place
containers such as air fresheners on the instrument panel or dashboard.
Adhesive discs or containers may act as lenses, causing a fire in the vehi-
cle.

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
1
2
3
1
2

548Alphabetical index
Engine
ACCESSORY mode ............. 197
Compartment ........................ 403
Engine switch........................ 196
Hood ..................................... 401
How to start the hybrid
system ................................ 196
Identification number ............ 503
If your vehicle has to be
stopped in an
emergency.......................... 449
Ignition switch
(power switch) .................... 196
Overheating .......................... 494
Power switch......................... 196
Engine coolant
Capacity ................................ 506
Checking ............................... 407
Preparing and checking
before winter....................... 333
Engine coolant temperature
gauge........................................ 98
Engine oil
Capacity ................................ 505
Checking ............................... 404
Preparing and checking
before winter....................... 333
Engine switch .......................... 196
Enhanced VSC ......................... 323
EPS
(Electric Power Steering)...... 324
Warning light ......................... 457
EV drive mode.......................... 202
Event data recorder
(EDR) ........................................ 10
Exclusive jump starting
terminal .................................. 487Flat tire ..................................... 471
Floor mats .................................. 24
Fluid
Brake .................................... 507
Hybrid transmission .............. 507
Washer ................................. 410
Front interior light ................... 353
Front passenger occupant
classification system .............. 48
Front passenger’s seat belt
reminder light ........................ 458
Front personal lights............... 353
Front seat heaters ................... 349
Front seats ............................... 155
Adjustment............................ 155
Cleaning ............................... 389
Correct driving posture ........... 26
Driving position memory ....... 159
Head restraints ..................... 164
Power easy access
system ................................ 159
Seat heaters ......................... 349
Seat ventilators ..................... 349
Front side marker lights
Light switch ........................... 218
Replacing light bulbs ............ 445
Front turn signal lights
Replacing light bulbs ............ 445
Turn signal lever ................... 211
Fuel
Capacity................................ 504
Fuel gauge.............................. 98
Information............................ 510
Refueling .............................. 230
Type.............................. 504, 510
Warning light......................... 458
Fuel consumption ........... 106, 131
Fuel filler door ......................... 230
If the fuel filler door
cannot be opened .............. 234
Refueling .............................. 230
Fuses ........................................ 442F

552Alphabetical index
Navigation system*
Noise from under vehicle............ 6
Odometer.................................... 98
Oil
Engine oil .............................. 505
Opener
Fuel filler door ....................... 233
Hood ..................................... 401
Trunk..................................... 144
Outside rear view mirrors ....... 170
Adjusting and folding ............ 170
Blind spot monitor (BSM) ...... 276
Linked mirror function
when reversing ................... 171
Mirror position memory ......... 159
Outside rear view mirror
defoggers ........................... 343
Outside temperature
display ...................................... 98
Overheating, Hybrid
system .................................... 494Paddle shift switches .............. 208
Panic mode .............................. 135
Panoramic view monitor*
Parking brake........................... 212
Parking brake engaged
warning buzzer/
message............................. 215
Warning light......................... 456
Parking lights........................... 218
Light switch ........................... 218
Replacing light bulbs ............ 445
PCS (Pre-Collision
System) .................................. 242
Warning light......................... 457
Personal lights......................... 353
Power control unit ..................... 79
Power control unit coolant ..... 407
Capacity................................ 506
Checking............................... 407
Preparing and checking
before winter ...................... 333
Power outlet ............................. 363
Power steering
(Electric power steering
system) .................................. 324
Warning light......................... 457
Power switch ........................... 196
Power windows ....................... 173
Door lock linked window
operation ............................ 175
Jam protection function ........ 173
Operation .............................. 173
Window lock switch .............. 173
Pre-Collision System
(PCS) ...................................... 242
Warning light......................... 457
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