check engine TOYOTA AVALON 2021 (in English) Service Manual

4407-2. Steps to take in an emergency
■When the tire pressure warning light comes on
Inspect the tires to check if a tire is punctured.
If a tire is punctured: P. 449
If none of the tires are punctured:
Turn the engine switch off then turn it to IGNITION ON mode. Check if the
tire pressure warning light comes on or blinks.
If the tire pressure warning light comes on
After the temperature of the tires has lowered sufficiently, check the
inflation pressure of each tire and adjust them to the specified level.
If the warning light does not turn off even after several minutes have
elapsed, check that the inflation pressure of each tire is at the specified
level and perform initialization. (P. 3 9 6 )
If the warning light does not turn off several minutes after the initialization
has been performed, have the vehicle inspected by your Toyota dealer
immediately.
If the tire pressure warning light blinks for 1 minute then stays on
There may be a malfunction in the tire pressure warning system. Have
the vehicle inspected by your Toyota dealer immediately.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such
as natural air leaks and tire inflation pressure changes caused by tem-
perature. In this case, adjusting the tire inflation pressure will turn off the
warning light (after a few minutes).
■When a tire is replaced with a spare tire
The compact spare tire is not equipped with a tire pressure warning valve
and transmitter. If a tire goes flat, the tire pressure warning light will not
turn off even though the flat tire has been replaced with the spare tire.
Replace the spare tire with the repaired tire and adjust the tire inflation
pressure. The tire pressure warning light will go off after a few minutes.
■Conditions that the tire pressure warning system may not function
properly
P. 4 0 0
■Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an
audio sound.
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4487-2. Steps to take in an emergency
■If “Engine Oil Level Low Add or Replace” is displayed
The engine oil level may be low. Check the level of the engine oil, and add
engine oil if necessary. This message may be displayed if the vehicle is
stopped on a slope. Move the vehicle to a level surface and check if the mes-
sage disappears.
■Warning buzzer
P. 440
NOTICE
■If “High Power Consumption Power to Climate Temporarily Limited” is
frequently shown
There is a possible malfunction relating to the charging system or the bat-
tery may be deteriorating. Have the vehicle inspected by your Toyota dealer.

4647-2. Steps to take in an emergency
■Tr u n k
Turn the mechanical key clock-
wise to open.
Ensure that the shift lever is in P and firmly depress the brake
pedal.
Touch the Toyota emblem side
of the electronic key to the
engine switch.
When the electronic key is
detected, a buzzer sounds and the
engine switch will turn to IGNITION
ON mode.
When the smart key system is
deactivated in customization set-
ting, the engine switch will turn to
ACCESSORY mode.
Firmly depress the brake pedal and check that is displayed
on the multi-information display.
Press the engine switch shortly and firmly.
In the event that the engine still cannot be started, contact your Toyota
dealer.
Starting the engine
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4657-2. Steps to take in an emergency
7
When trouble arises
■Stopping the engine
Shift the shift lever to P and press the engine switch as you normally do when
stopping the engine.
■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. 415)
■Changing engine switch modes
Release the brake pedal and press the engine switch in step above.
The engine does not start and modes will be changed each time the switch is
pressed. (P. 185)
■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. 505)
●Check if battery-saving mode is set. If it is set, cancel the function.
(P. 136)
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.
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4737-2. Steps to take in an emergency
7
When trouble arises
Start the engine and turn the air conditioning system on to check
that the radiator cooling fan operates and to check for coolant leaks
from the radiator or hoses.
The fan operates when the air conditioning system is turned on immedi-
ately after a cold start. Confirm that the fan is operating by checking the fan
sound and air flow. If it is difficult to check these, turn the air conditioning
system on and off repeatedly. (The fan may not operate in freezing tem-
peratures.)
If the fan is not operating:
Stop the engine immediately and contact your Toyota dealer.
If the fan is operating:
Have the vehicle inspected at the nearest Toyota dealer.
WARNING
■To prevent an accident or injury when inspecting under the hood of
your vehicle
Observe the following precautions.
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●If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot.
●Keep hands and clothing (especially a tie, a scarf or a muffler) away from
the fan and belts. Failure to do so may cause the hands or clothing to be
caught, resulting in serious injury.
●Do not loosen the radiator cap and the coolant reservoir cap while the
engine and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine coolant
Wait until the engine has cooled down before adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too
quickly can cause damage to the engine.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreign matter (such as sand or dust
etc.).
●Do not use any coolant additives.
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4818-1. Specifications
8
Vehicle specifications
■Oil capacity (Drain and refill [Reference*])
*: The engine oil capacity is a reference quantity to be used when changing
the engine oil. Warm up and turn off the engine, wait more than 5 minutes,
and check the oil level on the dipstick.
■
Engine oil selection
2.5 L 4-cylinder (A25A-FKS) engine
“Toyota Genuine Motor Oil” is used in your Toyota vehicle. Use
Toyota approved “Toyota Genuine Motor Oil” or equivalent to sat-
isfy the following grade and viscosity.
Oil grade: API SN/RC multigrade engine oil
Recommended viscosity: SAE 0W-16
SAE 0W-16 is the best choice for
good fuel economy and good start-
ing in cold weather.
If SAE 0W-16 is not available, SAE
0W-20 oil may be used. However,
it must be replaced with SAE 0W-
16 at the next oil change.
Oil viscosity (0W-16 is explained here as an example):
• The 0W in 0W-16 indicates the characteristic of the oil which allows cold
startability. Oils with a lower value before the W allow for easier starting of
the engine in cold weather.
• The 16 in 0W-16 indicates the viscosity characteristic of the oil when the
oil is at high temperature. An oil with a higher viscosity (one with a higher
value) may be better suited if the vehicle is operated at high speeds, or
under extreme load conditions.
Lubrication system
With filterWithout filter
2.5 L 4-cylinder
(A25A-FKS) engine4.8 qt.
(4.5 L, 4.0 Imp. qt.)4.4 qt.
(4.2 L, 3.7 Imp. qt.)
3.5 L V6 (2GR-FKS)
engine5.7 qt.
(5.4 L, 4.8 Imp. qt.)5.6 qt.
(5.3 L, 4.7 Imp. qt.)
Outside temperature

4848-1. Specifications
*: The fluid capacity is a reference quantity.
If replacement is necessary, contact your Toyota dealer.
Electrical system
Battery
Specific voltage reading at
68F (20C):12.3 V or higher
If the voltage is lower than the standard
value, charge the battery.
(When checking the voltage, after turning
the engine switch off, wait for 30 seconds
with the high beam headlights illuminated,
then turn the high beam headlights off and
check the voltage.)
Charging rates5 A max.
Automatic transaxle
Fluid capacity*
2.5 L 4-cylinder (A25A-FKS) engine
7.8 qt. (7.4 L, 6.5 Imp. qt.)
3.5 L V6 (2GR-FKS) engine
7.9 qt. (7.5 L, 6.6 Imp. qt.)
Fluid type Toyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than the above type may cause abnormal
noise or vibration, or damage the transmission of your vehicle.

530What to do if... (Troubleshooting)
What to do if... (Troubleshooting)
●If you lose your mechanical keys, new genuine mechanical keys can be
made by your Toyota dealer. (P. 123)
●If you lose your electronic keys, the risk of vehicle theft increases signifi-
cantly. Contact your Toyota dealer immediately. (P. 124)
●Is the key battery weak or depleted? (P. 415)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off. (P. 185)
●Is the electronic key left inside the vehicle?
When locking the doors, make sure that you have the electronic key on
your person.
●The function may not operate properly due to the condition of the radio
wave. (P. 123, 137)
●Is the child-protector lock set?
The rear door cannot be opened from inside the vehicle when the lock is
set. Open the rear door from outside and then unlock the child-protector
lock. (P. 128)
●The function to prevent the electronic key from being left inside the trunk
will operate and you can open the trunk as usual. Take the key out from the
trunk. (P. 132)
If you have a problem, check the following before contacting
your Toyota dealer.
The doors cannot be locked, unlocked, opened or closed
You lose your keys
The doors cannot be locked or unlocked
The rear door cannot be opened
The trunk lid is closed with the electronic key left inside

532What to do if... (Troubleshooting)
●The seat belt reminder light is flashing
Are the driver and the passenger wearing the seat belts? (P. 438)
●The parking brake indicator is on
Is the parking brake released? (P. 196)
Depending on the situation, other types of warning buzzer may also sound.
(P. 434, 444)
●Did anyone inside the vehicle open a door during setting the alarm?
The sensor detects it and the alarm sounds. (P. 80)
Do one of the following to stop the alarm:
• Unlock the doors.
• Open the trunk using the entry function or wireless remote control.
• Turn the engine switch to ACCESSORY or IGNITION ON mode, or start
the engine.
●Is the message displayed on the multi-information display?
Check the message on the multi-information display. (P. 444)
●When a warning light turns on or a warning message is displayed, refer to
P. 434, 444.
●Stop the vehicle in a safe place and replace the flat tire with the spare
tire. (P. 449)
●Try the procedure for when the vehicle becomes stuck in mud, dirt, or
snow. (P. 474)
A warning buzzer sounds during driving
An alarm is activated and the horn sounds
A warning buzzer sounds when leaving the vehicle
A warning light turns on or a warning message is displayed
When a problem has occurred
If you have a flat tire
The vehicle becomes stuck

535Alphabetical index
Child safety ................................ 55
Airbag precautions .................. 39
Battery precautions ....... 392, 470
Child restraint system ............. 56
How your child should wear
the seat belt .......................... 32
Installing child restraints ......... 60
Moon roof precautions .......... 167
Power window lock switch .... 160
Power window precautions ... 163
Rear door child-protectors .... 128
Removed electronic key
battery precautions ............. 416
Seat belt extender
precautions ........................... 35
Seat belt precautions .............. 34
Seat heater precautions........ 329
Trunk precautions ................. 133
Child-protectors....................... 128
Cleaning ........................... 366, 369
Exterior ................................. 366
Interior................................... 369
Seat belts .............................. 370
Wheels and wheel
ornaments .......................... 367
Coat hooks ............................... 356
Condenser ................................ 389
Connected Services
*
Console box ............................. 336
Consumption
screen............................... 97, 116
Coolant
Capacity ................................ 483
Checking ............................... 388
Preparing and checking
before winter....................... 317
Cooling system ........................ 388
Engine overheating ............... 471
Cornering lights ....................... 203
Cruise control
Dynamic radar cruise control
with full-speed range .......... 247Cup holders ............................. 338
Curtain shield airbags............... 37
Customizable features ............ 505
Customized mode ................... 305
Daytime running light
system.................................... 204
Defogger
Outside rear view mirrors ..... 324
Rear window ......................... 324
Windshield ............................ 324
Dimensions .............................. 478
Dinghy towing.......................... 183
Display
Dynamic radar cruise control
with full-speed range .......... 247
LDA (Lane Departure Alert
with steering control) .......... 242
Multi-information display ......... 93
Warning messages ............... 444
Do-it-yourself maintenance .... 379
Door courtesy lights
Location ................................ 332
Wattage ................................ 488
Door lock
Doors .................................... 125
Smart key system ................. 125
Wireless remote control ........ 125
Doors ........................................ 125
Automatic door locking
and unlocking systems ....... 128
Door lock .............................. 127
Outside rear view mirrors ..... 157
Rear door child-protector ...... 128
Side doors ............................ 125
Side windows........................ 160
Drive-Start Control .................. 171
Driver’s seat belt
reminder light ........................ 438
D
*: Refer to the “NAVIGATION AND MULTIMEDIA SYSTEM
OWNER’S MANUAL”.