2021 TOYOTA AVALON HYBRID Battery access

1984-2. Driving procedures
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes or ON
mode (with the hybrid system not operating) for more than an hour with the
shift lever in P, the power switch will automatically turn off. However, this func-
tion cannot entirely prevent 12-volt battery discharge. Do not leave the vehi-
cle with the power switch in ACCESSORY or ON mode for long periods of
time when the hybrid system is not operating.
■Automatic hybrid system shut off feature
●The vehicle is equipped with a feature that automatically shuts off the hybrid
system when the shift lever is in P with the hybrid system operating for an
extended period.
●The hybrid system will automatically shut off after approximately 1 hour if it
has been left running while the shift lever is in P.
●The timer for the automatic hybrid system shut off feature will reset if the
brake pedal is depressed or if the shift lever is in a position other than P.
●After the vehicle is parked, if the door is locked with the door lock switch
(P. 140) from the inside or the mechanical key (P. 484) from the outside,
the automatic hybrid system shut off feature will be disabled. The timer for
the automatic hybrid system shut off feature will be re-enabled if the driver’s
door is opened.
■Sounds and vibrations specific to a hybrid vehicle
P. 78
■Electronic key battery depletion
P. 136
■When the ambient temperature is low, such as during winter driving con-
ditions
●When starting the hybrid system, the flashing time of the “READY” indicator
may be long. Leave the vehicle as it is until the “READY” indicator is steady
on, as steady means the vehicle is able to move.
●When the hybrid battery (traction battery) is extremely cold (below approxi-
mately -22°F [-30°C]) under the influence of the outside temperature, it may
not be possible to start the hybrid system. In this case, try to start the hybrid
system again after the temperature of the hybrid battery increases due to
the outside temperature increase etc.
■Conditions affecting operation
P. 151
■Notes for the entry function
P. 152
■If the hybrid system does not start
●The immobilizer system may not have been deactivated. (P. 86)
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.

2014-2. Driving procedures
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Driving
NOTICE
■To prevent 12-volt battery discharge
●Do not leave the power switch in ACCESSORY or ON mode for long peri-
ods of time without the hybrid system on.
●If “ACCESSORY” or “IGNITION ON” is displayed on the multi-information
display, the power switch is not off. Exit the vehicle after turning the power
switch off.
●Do not stop the hybrid system when the shift lever is in a position other
than P. If the hybrid system is stopped in another shift lever position, the
power switch will not be turned off but instead be turned to ACCESSORY
mode. If the vehicle is left in ACCESSORY mode, 12-volt battery dis-
charge may occur.
■When starting the hybrid system
●Do not depress the accelerator pedal unnecessarily.
●If the hybrid system becomes difficult to start, have your vehicle checked
by your Toyota dealer immediately.
■Symptoms indicating a malfunction with the power switch
If the power switch seems to be operating somewhat differently than usual,
such as the switch sticking slightly, there may be a malfunction. Contact
your Toyota dealer immediately.

2214-3. Operating the lights and wipers
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Driving
■12-volt battery-saving function
In the following conditions, the remaining lights will go off automatically after
20 minutes in order to prevent the 12-volt battery from being discharged:
●The headlights and/or tail lights are on.
●The power switch is in ACCESSORY mode or turned off.
This function will be canceled in any of the following situations:
●When the power switch is turned to ON mode.
●When the light switch is operated.
●When a door or the trunk is opened or closed.
■Welcome lighting
If the headlight switch is turned to and the surrounding area is dark,
unlocking the doors using the smart key system or wireless remote control
will turn the parking lights and tail lights on automatically.
■Customization
Some functions can be customized. (P. 526)
NOTICE
■To prevent 12-volt battery discharge
Do not leave the lights on longer than necessary when the hybrid system is
off.

2974-5. Using the driving support systems
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Driving
■If “Parking Assist Unavailable” is displayed on the multi-information dis-
play
●Water may be continuously flowing over the sensor surface, such as in a
heavy rain. When the system determines that it is normal, the system will
return to normal.
●Initialization may not have been performed after a battery terminal was dis-
connected and reconnected. Initialize the system. If this message continues
to be displayed even after initialization, have the vehicle inspected by your
Toyota dealer.
■Customization
Some functions can be customized. (P. 111, 527)
WARNING
■When using the intuitive parking assist
Observe the following precautions.
Failing to do so may result in the vehicle being unable to be driven safely
and possibly cause an accident.
●Do not use the sensor at speeds in excess of 6 mph (10 km/h).
●The sensors’ detection areas and reaction times are limited. When moving
forward or reversing, check the areas surrounding the vehicle (especially
the sides of the vehicle) for safety, and drive slowly, using the brake to
control the vehicle’s speed.
●Do not install accessories within the sensors’ detection areas.

3635-4. Other interior features
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Interior features
Please use as a power supply for electronic goods that use less than
12 VDC/10 A (power consumption of 120 W).
Open the lid.
■The power outlet can be used when
The power switch is in ACCESSORY or ON mode.
■When stopping the hybrid system
Disconnect electrical devices with charging functions, such as mobile battery
packs.
If such devices are left connected, the hybrid system may not stop normally.
Power outlet
NOTICE
●To avoid damaging the power outlet, close the power outlet lid when it is
not in use.
Foreign objects or liquids that enter the power outlet may cause a short
circuit.
●To prevent 12-volt battery discharge, do not use the power outlet longer
than necessary when the hybrid system is off.

3936-2. Maintenance
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Maintenance and care
■Repair and replacement
It is recommended that genuine Toyota parts be used for repairs to ensure
performance of each system. If non-Toyota parts are used in replacement or if
a repair shop other than a Toyota dealer performs repairs, confirm the war-
ranty coverage.
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After the required maintenance is performed according to the maintenance
schedule, please reset the message.
To reset the message, perform the following procedure:
Select on the multi-information display using the meter control switches
on the steering wheel. (P. 111)
Select and then press and hold .
Select “Scheduled Maintenance” and then press .
Select “Yes” and then press .
A message will be displayed on the multi-information display when the
reset procedure has been completed.
■Allow inspection and repairs to be performed by a Toyota dealer
●Toyota technicians are well-trained specialists and are kept up to date with
the latest service information. They are well informed about the operations
of all systems on your vehicle.
●Keep a copy of the repair order. It proves that the maintenance that has
been performed is under warranty coverage. If any problem should arise
while your vehicle is under warranty, your Toyota dealer will promptly take
care of it.
WARNING
■If your vehicle is not properly maintained
Improper maintenance could result in serious damage to the vehicle and
possible death or serious injury.
■Important health and safety information
●Engine exhaust, some of its constituents, and a wide variety of automobile
components contain or emit chemicals known to the State of California to
cause cancer and birth defects and other reproductive harm. Work in a
well ventilated area.
●Oils, fuels and fluids contained in vehicles as well as waste produced by
component wear contain or emit chemicals known to the State of
California to cause cancer and birth defects or other reproductive harm.
Avoid exposure and wash any affected area immediately.
●12-volt battery posts, terminals and related accessories contain lead and
lead compounds which are known to cause brain damage. Wash your
hands after handling. (P. 411)
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4126-3. Do-it-yourself maintenance
Make sure that the 12-volt battery terminals are not corroded and that
there are no loose connections, cracks, or loose clamps.
Terminals
Hold-down clamp
■Before recharging
When recharging, the 12-volt battery produces hydrogen gas which is flam-
mable and explosive. Therefore, observe the following precautions before
recharging:
●If recharging with the 12-volt battery installed on the vehicle, be sure to dis-
connect the ground cable.
●Make sure the power switch on the charger is off when connecting and dis-
connecting the charger cables to the 12-volt battery.
■After recharging/reconnecting the 12-volt battery
●Unlocking the doors using the smart key system may not be possible imme-
diately after reconnecting the 12-volt battery. If this happens, use the wire-
less remote control or the mechanical key to lock/unlock the doors.
●Start the hybrid system with the power switch in ACCESSORY mode. The
hybrid system may not start with the power switch turned off. However, the
hybrid system will operate normally from the second attempt.
●The power switch mode is recorded by the vehicle. If the 12-volt battery is
reconnected, the vehicle will return the power switch mode to the status it
was in before the 12-volt battery was disconnected. Make sure to turn off
the power before disconnecting the 12-volt battery. Take extra care when
connecting the 12-volt battery if the power switch mode prior to discharge is
unknown.
If the system will not start even after multiple attempts, contact your Toyota
dealer.
Exterior
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4146-3. Do-it-yourself maintenance
NOTICE
■When recharging the 12-volt battery
Never recharge the 12-volt battery while the hybrid system is operating.
Also, be sure all accessories are turned off.