ECO mode TOYOTA AVALON HYBRID 2021 (in English) Service Manual

4006-3. Do-it-yourself maintenance
Tire inflation
pressure
(P. 427)• Tire pressure gauge
• Compressed air source
Washer fluid
(P. 410)• Water or washer fluid containing antifreeze (for win-
ter use)
• Funnel (used only for adding water or washer fluid)
WARNING
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury, observe the following precautions.
■When working on the engine compartment
●Make sure that the “ACCESSORY” or “IGNITION ON” on the multi-infor-
mation display and the “READY” indicator are both off.
●Keep hands, clothing and tools away from the moving fan and engine
drive belt.
●Be careful not to touch the engine, power control unit, radiator, exhaust
manifold, etc. right after driving as they may be hot. Oil and other fluids
may also be hot.
●Do not leave anything that may burn easily, such as paper and rags, in the
engine compartment.
●Do not smoke, cause sparks or expose an open flame to fuel. Fuel fumes
are flammable.
■When working near the electric cooling fan or radiator grille
Be sure the power switch is off.
With the power switch in ON mode, the electric cooling fan may automati-
cally start to run if the air conditioning is on and/or the coolant temperature
is high. (P. 408)
■Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc.
from getting in your eyes.
NOTICE
■If you remove the air cleaner filter
Driving with the air cleaner filter removed may cause excessive engine wear
due to dirt in the air.
ItemsParts and tools

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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4246-3. Do-it-yourself maintenance
■Canceling ID code registration
●To cancel ID code registration after it has been started, turn the power
switch off before driving the vehicle.
If the vehicle is driven after ID code registration is started, to cancel reg-
istration, perform the ID code registration start procedure again and turn
the power switch off before driving.
●If ID code registration has been canceled, the tire pressure warning light
will blink for approximately 1 minute when the power switch is turned to
ON mode and then illuminate. The tire pressure warning system will be
operational when the tire pressure warning light turns off.
●If the warning light does not turn off even after several minutes have
elapsed, ID code registration may not have been cancelled correctly. To
cancel registration, perform the ID code registration start procedure
again and then turn the power switch off before driving.
■If ID codes are not registered properly
●In the following situations, ID code registration may take longer than
usual to be completed or may not be possible. (Usually, the vehicle will
need to be driven for approximately 10 to 30 minutes to complete ID
code registration.)
If ID code registration is not complete after driving for approximately 30
minutes, continue driving for a while.
• If the vehicle is driven on an unpaved road, it may take longer than
normal to complete registration.
• If the vehicle is backed up while performing registration, data col-
lected during registration will be cleared, and it will take longer than
normal to complete.
• If the vehicle is driven in heavy traffic or another situation where other
vehicles are driven close by, it may take time for the system to recog-
nize the tire pressure warning valve and transmitters of your vehicle
over those of other vehicles.
• If a wheel with a tire pressure warning valve and transmitter installed
is inside or near the vehicle, registration of the ID codes for the
installed wheels may not be possible.
If ID registration is not complete after driving for approximately 1 hour,
park the vehicle in a safe place for approximately 20 minutes and then
perform the ID code registration procedure again.
●In the following situations, ID code registration will not be started or was
not completed properly and the system will not operate properly. Per-
form the ID code registration procedure again.
• If, when attempting to start ID code registration, the tire pressure
warning light does not blink slowly 3 times.
• If, when the vehicle has been driven for about 20 minutes after per-
forming ID code registration, the tire pressure warning light blinks for
approximately 1 minute and then illuminates.
●If ID code registration cannot be completed after performing the above
procedure, contact your Toyota dealer.

4256-3. Do-it-yourself maintenance
6
Maintenance and care
■Tire pressure warning system certification
FCC ID: PAXPMVE000
WARNING
■When inspecting or replacing tires
Observe the following precautions to prevent accidents.
Failure to do so may cause damage to parts of the drive train as well as
dangerous handling characteristics, which may lead to an accident
resulting in death or serious injury.
●Do not mix tires of different makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other than those recommended by Toyota.
●Do not mix differently constructed tires (radial, bias-belted or bias-ply
tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.
■When initializing the tire pressure warning system
Do not initialize the tire pressure warning system without first adjusting
the tire inflation pressure to the specified level. Otherwise, the tire pres-
sure warning light may not come on even if the tire inflation pressure is
low, or it may come on when the tire inflation pressure is actually nor-
mal.

4837-2. Steps to take in an emergency
7
When trouble arises
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. (P. 487)
●One or both of the 12-volt battery terminals may be disconnected.
(P. 411)
Contact your Toyota dealer if the problem cannot be repaired, or if repair
procedures are unknown.
When the hybrid system does not start, the following steps can be
used as an interim measure to start the hybrid system if the power
switch is functioning normally.
Do not use this starting procedure except in case of emergency.
Set the parking brake.
Shift the shift lever to P.
Turn the power switch to ACCESSORY mode.
Press and hold the power switch for about 15 seconds while
depressing the brake pedal firmly.
Even if the hybrid system can be started using the above steps, the
system may be malfunctioning. Have the vehicle inspected by your
Toyota dealer.
The interior lights and headlights do not turn on, or the horn
does not sound.
Emergency start function
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4867-2. Steps to take in an emergency
■Stopping the hybrid system
Shift the shift lever to P and press the power switch as you normally do when
stopping the hybrid system.
■Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
(P. 439)
■Changing power switch modes
Release the brake pedal and press the power switch in step above.
The hybrid system does not start and modes will be changed each time the
switch is pressed. (P. 197)
■When the electronic key does not work properly
●Make sure that the smart key system has not been deactivated in the cus-
tomization setting. If it is off, turn the function on.
(Customizable features: P. 526)
●Check if battery-saving mode is set. If it is set, cancel the function.
(P. 150)
WARNING
■When using the mechanical key and operating the power windows or
moon roof
Operate the power window or moon roof after checking to make sure that
there is no possibility of any passenger having any of their body parts
caught in the window or moon roof. Also, do not allow children to operate
the mechanical key. It is possible for children and other passengers to get
caught in the power window or moon roof.
3

4897-2. Steps to take in an emergency
7
When trouble arises
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that level for approximately 5 minutes to
recharge the 12-volt battery of your vehicle.
Open and close any of the doors of your vehicle with the power
switch off.
Maintain the engine speed of the second vehicle and turn the power
switch to ON mode, then start the vehicle's engine.
Make sure the “READY” indicator comes on. If the indicator does
not come on, contact your Toyota dealer.
Once the hybrid system has started, remove the jumper cables in
the exact reverse order from which they were connected.
Close the exclusive jump starting terminal cover, and reinstall the
fuse box cover to its original position.
Once the hybrid system starts, have the vehicle inspected at your
Toyota dealer as soon as possible.5
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4907-2. Steps to take in an emergency
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■To prevent 12-volt battery discharge
●Turn off the headlights and the audio system while the hybrid system is off.
●Turn off any unnecessary electrical components when the vehicle is running
at a low speed for an extended period, such as in heavy traffic.
■When the 12-volt battery is removed or discharged
●Information stored in the ECU is cleared. When the 12-volt battery is
depleted, have the vehicle inspected at your Toyota dealer.
●Some systems may require initialization. (P. 535)
■When removing the 12-volt battery terminals
When the 12-volt battery terminals are removed, the information stored in the
ECU is cleared. Before removing the 12-volt battery terminals, contact your
Toyota dealer.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when
the vehicle is not in use, due to natural discharge and the draining effects of
certain electrical appliances. If the vehicle is left for a long time, the 12-volt
battery may discharge, and the hybrid system may be unable to start. (The
12-volt battery recharges automatically while the hybrid system is operating.)
■When recharging or replacing the 12-volt battery
●In some cases, it may not be possible to unlock the doors using the smart
key system when the 12-volt battery is discharged. Use the wireless remote
control or the mechanical key to lock or unlock the doors.
●The hybrid system may not start on the first attempt after the 12-volt battery
has recharged but will start normally after the second attempt. This is not a
malfunction.
●The power switch mode is memorized by the vehicle. When the 12-volt bat-
tery is reconnected, the system will return to the mode it was in before the
12-volt battery was discharged. Before disconnecting the 12-volt battery,
turn the power switch off.
If you are unsure what mode the power switch was in before the 12-volt bat-
tery discharged, be especially careful when reconnecting the 12-volt battery.

547Alphabetical index
Driver’s seat position
memory .................................. 159
Driving
Break-in tips .......................... 184
Correct posture ....................... 26
Driving mode select
switches.............................. 321
Hybrid vehicle driving tips ..... 330
Procedures ........................... 182
Winter drive tips .................... 333
Driving information ................. 106
Driving position memory ........ 159
Memory recall function.......... 162
Power easy access
system ................................ 159
Dynamic radar cruise control
with full-speed range ............ 263
ECO Accelerator Guidance..... 109
Eco drive mode ........................ 321
Eco guide ................................. 109
Eco score ................................. 109
EDR
(Event data recorder) .............. 10
Electric motor
(traction motor) ....................... 79
Electric Power Steering
(EPS)....................................... 324
Warning light ......................... 457
Electronic key .......................... 134
Battery-saving function ......... 150
If the electronic key does
not operate properly ........... 484
Replacing the battery ............ 439
Emergency flashers ................ 448Emergency, in case of
If a warning buzzer
sounds................................ 455
If a warning light turns on ..... 455
If a warning message is
displayed ............................ 465
If the 12-volt battery is
discharged.......................... 487
If the electronic key does not
operate properly ................. 484
If the hybrid system
will not start ........................ 482
If the vehicle is trapped in
rising water ......................... 450
If you have a flat tire ............. 471
If you lose your keys ..... 135, 137
If you think something is
wrong ................................. 454
If your vehicle becomes
stuck ................................... 498
If your vehicle has to be
stopped in an emergency ... 449
If your vehicle needs to be
towed.................................. 451
If your vehicle overheats....... 494
E
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM
OWNER’S MANUAL”.

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