2015 TOYOTA AVALON HYBRID engine overheat

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AVALON_HV_U (OM41457U)6-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 322
Cleaning and protecting the vehicle interior ........... 325
6-2. Maintenance Maintenance requirements ................... 328
General maintenance ........ 330
Emission inspection and maintenance (I/M)
programs ......................... 334
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions ..................... 335
Hood.................................. 338
Positioning a floor jack ...... 339
Engine compartment ......... 341
12-volt battery ................... 350
Tires .................................. 354
Tire inflation pressure........ 361
Wheels .............................. 364
Air conditioning filter .......... 367
Electronic key battery ........ 369
Checking and replacing fuses ............................... 371
Light bulbs ......................... 382 7-1. Essential information
Emergency flashers ........... 398
If your vehicle has to be stopped in an
emergency....................... 399
7-2. Steps to take in an emergency
If your vehicle needs to be towed ...................... 400
If you think something is wrong............................... 403
If a warning light turns on or a warning buzzer
sounds ............................. 404
If a warning message is displayed ......................... 414
If you have a flat tire .......... 415
If the hybrid system will not start ........................... 427
If the shift lever cannot be shifted from P ............. 429
If the electronic key does not operate properly ........ 430
If the 12-volt battery is discharged ....................... 432
If your vehicle overheats......................... 436
If the vehicle becomes stuck ................................ 440
6Maintenance and care7When trouble arises

17Pictorial index
AVALON_HV_U (OM41457U)Windshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 201
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . P. 256
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . P. 323
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 206
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 206
Fuel type/fuel tank capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 446
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 354
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . P. 451
Winter tires/tire chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 256
Checking/rotation/tire pressure warning system . . . . . . . . . P. 354
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 415
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 338
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 447
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 436
Headlights/parking lights/side marker lights/
daytime running lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 191
Fog lights
* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 200
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 188
Stop/tail lights
Hill-start assist control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 237
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 191
Back-up lights
Shifting the shift lever to R . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 185
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Light bulbs of the exterior lights for driving
(Replacing method: P. 382, Wattages: P. 452)
*: If equipped
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952. Instrument cluster
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Instrument cluster
AVALON_HV_U (OM41457U)■
Customization
The instrument panel light auto dimmer control can be changed.
(Customizable feature: P. 469)
NOTICE
■To prevent damage to the engine and its components
● When indicating the tachometer (Using the S mode driving): Do not let the
indicator of the tachometer enter the red zone, which indicates the maxi-
mum engine speed. ( P. 186)
● 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. 436)

1644-1. Before driving
AVALON_HV_U (OM41457U)
CAUTION
Observe the following precautions.
Failure to do so may result in death or serious injury.
■When driving the vehicle
● 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. 399
● 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. 185)
● Do not adjust 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.
● Do not drive in excess of the speed limit. Even if the legal speed limit per-
mits it, do not drive over 85 mph ( 140 km/h) unless your vehicle has high-
speed capability tires. Driving over 85 mph (140 km/h) may result in tire
failure, loss of control and possible injury. Be sure to consult a tire dealer
to determine whether the tires on y our vehicle are high-speed capability
tires or not before driving at such speeds.

1664-1. Before driving
AVALON_HV_U (OM41457U)
CAUTION
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 vehicle is in any gear other than P or N, the vehicle may accelerate
suddenly and unexpectedly, causing an accident.
● In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while the “READY” indicator is on, 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 combusti\
ble
material is nearby.

2344-5. Using the driving support systems
AVALON_HV_U (OM41457U)
■Turning off both TRAC/VSC systems
To turn the TRAC/VSC systems off, press and hold the switch for more than 3
seconds while the vehicle is stopped.
The VSC OFF and “TRAC OFF” indica tor lights will come on and the mes-
sage will be shown on the multi-information display.
Press the switch again to turn the systems back on.
■ When the message is displayed on th e multi-information display show-
ing that TRAC has been disabled and “TRAC OFF” indicator light comes
on even if the TRAC/VSC OFF switch has not been pressed
TRAC and hill-start assist control cannot be operated. Contact your Toyota
dealer.
■ Sounds and vibrations caused by the ABS, brake assist, TRAC, VSC
systems
●A sound may be heard from the engine compartment when the brake pedal
is depressed repeatedly, when the hybrid system is started or just after the
vehicle begins to move. This sound does not indicate that a malfunction has
occurred in any of these systems.
● Any of the following conditions may occur when the above systems are
operating. None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard after the vehicle comes to a stop.
■ EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
■ 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.
■ 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 effectiveness of the EPS system will be restored after a short while.

4367-2. Steps to take in an emergency
AVALON_HV_U (OM41457U)
The engine coolant temperature gauge enters the red zone or a loss
of power is experienced. (For ex ample, the vehicle speed does not
increase.)
“Hybrid System Overheat/Stop the Vehicle in a Safe Place” is shown
on the multi-information display.
Steam comes out from under the hood.
■If the needle of the engine coolant temperature gauge enters
the red zone
Stop the vehicle in a safe place and turn off the air conditioning
system, 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 radia-
tor 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:
Correction procedures
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488Alphabetical index
AVALON_HV_U (OM41457U)
Child-protectors....................... 130
Child safety ................................ 5312-volt battery precautions ................. 352, 435
Airbag precautions .................. 39
Child restraint system ............. 54
How your child should wear the seat belt .......................... 32
Installing child restraints ......... 58
Moon roof precautions .......... 158
Power window lock switch .... 152
Power window precautions ... 154
Rear door child-protectors .... 130
Removed electronic key battery precautions ...... 370
Seat belt extender precautions ........................... 35
Seat belt precautions .............. 57
Seat heater precautions........ 297
Trunk precautions ................. 134
Cleaning ........................... 322, 325 Aluminum wheels.................. 323
Exterior ................................. 322
Interior................................... 325
Seat belts .............................. 326
Clock ......................................... 289
Coat hooks ............................... 301
Compass .................................. 316
Condenser ................................ 347 Console box ............................. 279
Consumption screen............... 102
Coolant ..................................... 345
Capacity................................ 449
Checking............................... 345
Preparing and checking before winter ...................... 256
Cooling system........................ 345
Engine overheating............... 436
Hybrid system overheating ... 436
Cruise control
Cruise control ....................... 211
Dynamic radar cruise control ................................ 215
Cup holders ............................. 280
Curtain shield airbags............... 37
Customizable features ............ 469