2017 TOYOTA AVALON HYBRID overheating

781-2. Hybrid system
WARNING
■Hybrid battery (traction battery)
● Never resell, hand over or modify the hybrid battery. To prevent accidents,
hybrid batteries that have been removed from a disposed vehicle are col-
lected through Toyota dealer. Do not dispose of the battery yourself.
Unless the battery is properly collected, the following may occur, resulting
in death or serious injury:
• The hybrid battery may be illegally disposed of or dumped, and it is haz-
ardous to the environment or someone may touch a high voltage part,
resulting in an electric shock.
• The hybrid battery is intended to be used exclusively with your hybrid
vehicle. If the hybrid battery is used outside of your vehicle or modified
in any way, accidents such as electric shock, heat generation, smoke
generation, an explosion and electrolyte leakage may occur.
When reselling or handing over your vehicle, the possibility of an accident
is extremely high because the person receiving the vehicle may not be
aware of these dangers.
● If your vehicle is disposed of without the hybrid battery having been
removed, there is a danger of serious electric shock if high voltage parts,
cables and their connectors are touched. In the event that your vehicle
must be disposed of, the hybrid battery must be disposed of by your
Toyota dealer or a qualified service shop. If the hybrid battery is not dis-
posed of properly, it may cause electric shock that can result in death or
serious injury.
NOTICE
■Hybrid battery air intake vent
● Do not place objects that will block the air intake vent. The hybrid battery
(traction battery) may overheat and be damaged.
● Clean the air intake vent regularly to prevent the hybrid battery (traction
battery) from overheating.
● Do not wet or allow foreign substances to enter the air intake vent as this
may cause a short circuit and damage the hybrid battery (traction battery).
● Do not carry large amounts of water such as water cooler bottles in the
vehicle. If water spills onto the hybrid battery (traction battery), the battery
may be damaged. Have the vehicle inspected by your Toyota dealer.

932. Instrument cluster
2
Instrument cluster
■Customization
The instrument panel light auto dimmer control can be changed.
(Customizable feature: →P. 461)
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. 181)
● 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. 429)

1634-1. Before driving
4
Driving
WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
■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.

1754-2. Driving procedures
4
Driving
■If the hybrid system does not start
●The immobilizer system may not have been deactivated. ( →P. 79)
Contact your Toyota dealer.
● Check that the shift lever is securely set in P. The hybrid system may not
start if the shift lever is displaced out of P.
■ 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 o verheating 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. 7 5
■ If the electronic key battery is depleted
→P. 373 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.

1854-2. Driving procedures
4
Driving
To set the parking brake, fully
depress the parking brake pedal
with your left foot while depress-
ing the brake pedal with your right
foot.
(Depressing the pedal again
releases the parking brake.)
■Parking the vehicle
→P. 156
■ Usage in winter time
→P. 270
Parking brake
NOTICE
■Before driving
Fully release the parking brake.
Driving the vehicle with the parking brake set will lead to brake components
overheating, which may affect braking performance and increase brake
wear.

2644-5. Using the driving support systems
■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 EPS system should return to normal within 10 minutes.
■ Hill-start assist control operating conditions
●The system operates in the following situations:
• The shift lever is in a position other than P or N.
• The parking brake is not applied.
• The accelerator pedal is not depressed.
● Hill-start assist control cannot be operated while the slip indicator light is illu-
minated.
■ Hill-start assist control
●While hill-start assist control is operating, the brakes remain automatically
applied after the driver releases the brake pedal. The stop lights and the
high mounted stoplight turn on.
● Hill-start assist control operates for about 2 seconds after the brake pedal is
released.
■ If the slip indicator comes on
It may indicate a malfunction in the system. Contact your Toyota dealer.
WARNING
■The ABS does not operate effectively when
● The limits of tire gripping performance have been exceeded (such as
excessively worn tires on a snow covered road).
● The vehicle hydroplanes while driving at high speed on wet or slick roads.

4297-2. Steps to take in an emergency
7
When trouble arises
●The engine coolant temperature gauge enters the red zone or a
loss of power is experienced. (For example, the vehicle speed does
not increase.)
● “Hybrid System Overhe at/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
1
2
3
1
2

478Alphabetical index
Child safety ................................ 5412-volt battery
precautions ................. 354, 428
Airbag precautions .................. 39
Child restraint system ............. 55
How your child should wear the seat belt .......................... 32
Installing child restraints ......... 59
Moon roof precautions .......... 154
Power window lock switch .... 148
Power window precautions ... 150
Rear door child-protectors .... 113
Removed electronic key battery precautions ...... 374
Seat belt extender precautions ........................... 35
Seat belt precautions .............. 58
Seat heater precautions........ 283
Trunk precautions ................. 119
Child-protectors....................... 113
Cleaning ........................... 326, 329
Aluminum wheels.................. 327
Exterior ................................. 326
Interior................................... 329
Seat belts .............................. 330
Clock ......................................... 300
Coat hooks ............................... 306
Compass .................................. 320
Condenser ................................ 349 Console box ............................. 291
Consumption screen............... 100
Coolant ..................................... 347
Capacity................................ 441
Checking............................... 347
Preparing and checking before winter ...................... 269
Cooling system........................ 347
Engine overheating............... 429
Hybrid system overheating ... 429
Cruise control
Cruise control ....................... 246
Dynamic radar cruise control ................................ 233
Cup holders ............................. 292
Curtain shield airbags............... 37
Customizable features ............ 461