Page 350 of 496
3506-3. Do-it-yourself maintenance
AVALON (U)_(OM41440U)
●Flathead screwdriver
● Small flathead screwdriver
● Lithium battery CR2032
Take out the mechanical key.
Remove the cover.
To prevent damage to the key,
cover the tip of the screwdriver with
a rag.
Remove the depleted battery.
Insert a new battery with the “+”
terminal facing up.
Electronic key batter y
Replace the battery with a new one if it is depleted.
You will need the following items:
Replacing the battery
1
2
3
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3516-3. Do-it-yourself maintenance
6
Maintenance and care
AVALON (U)_(OM41440U)
■Use a CR2032 lithium battery
●Batteries can be purchased at your Toyota dealer, local electrical appliance
shops or camera stores.
● Replace only with the same or equivalent type recommended by the manu-
facturer.
● Dispose of used batteries according to local laws.
■ If the electronic key battery is depleted
The following symptoms may occur:
●The smart key system and wireless remote control will not function properly.
● The operational range will be reduced.
CAUTION
■ Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. Failure to do so could result in death or serious
injury.
NOTICE
■For normal operation after replacing the battery
Observe the following precautions to prevent accidents:
●Always work with dry hands.
Moisture may cause the battery to rust.
● Do not touch or move any other component inside the remote control.
● Do not bend either of the battery terminals.
Page 379 of 496
379
When trouble arises7
AVALON (U)_(OM41440U)7-1. Essential information
Emergency flashers .......... 380
If your vehicle has to be stopped in an
emergency ...................... 381
7-2. Steps to take in an emergency
If your vehicle needs to be towed ......................... 382
If you think something is wrong .......................... 385
Fuel pump shut off system ............................ 386
If a warning light turns on or a warning buzzer
sounds ............................ 387
If a warning message is displayed ..................... 398
If you have a flat tire.......... 399
If the engine will not start ................................. 412
If the shift lever cannot be shifted from P ............. 414
If the electronic key does not operate properly........ 415
If the vehicle battery is discharged ...................... 418
If your vehicle overheats ........................ 422
If the vehicle becomes stuck ............................... 425
Page 412 of 496

4127-2. Steps to take in an emergency
AVALON (U)_(OM41440U)
One of the following may be the cause of the problem:
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The engine may be flooded.
Try to restart the engine again following correct starting procedures.
( P. 155)
● There may be a malfunction in the engine immobilizer system.
( P. 66)
One of the following may be the cause of the problem:
● The battery may be discharged. ( P. 418)
● The battery terminal connections may be loose or corroded.
The engine starting system may be malfunctioning due to an electrical
problem such as electronic key battery depletion or a blown fuse.
However, an interim measure is available to start the engine.
( P. 413)
If the engine will not star t
If the engine will not start even though correct starting proce-
dures are being followed ( P. 155), consider each of the follow-
ing points:
The engine will not start even though the starter motor operates
normally.
The starter motor turns over slowly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a low
volume.
The starter motor does not turn over
Page 415 of 496
4157-2. Steps to take in an emergency
7
When trouble arises
AVALON (U)_(OM41440U)■
Doors
Use the mechanical key
(
P. 88) in order to perform the
following operations:
Locks all the doors
Unlocks the door
Turning the key rearward
unlocks the driver’s door. Turn-
ing the key once again within 5
seconds unlocks the other
doors.
■
Tr u n k
P. 1 1 4
If the electronic key does not operate
properly
If communication between the electronic key and vehicle is
interrupted ( P. 100) or the electronic key cannot be used
because the battery is depleted, the smart key system and wire-
less remote control cannot be used. In such cases, the doors
and trunk can be opened and the engine can be started by fol-
lowing the procedure below.
Locking and unlocking the doors and unlocking the trunk
1
2
Page 417 of 496
4177-2. Steps to take in an emergency
7
When trouble arises
AVALON (U)_(OM41440U)
■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. 350)
■ 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. 156)
■ 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. 453)
● Check if battery-saving mode is set. If it is set, cancel the function.
(P. 99)
3
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4207-2. Steps to take in an emergency
AVALON (U)_(OM41440U)
■Starting the engine when the battery is discharged
The engine cannot be started by push-starting.
■ To prevent battery discharge
●Turn off the headlights and the audio system while the engine 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.
■ Charging the battery
The electricity stored in the battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of cer-
tain electrical appliances. If the vehicle is left for a long time, the battery may
discharge, and the engine may be unable to start. (The battery recharges
automatically during driving.)
■ When recharging or replacing the battery
●In some cases, it may not be possible to unlock the doors using the smart
key system when the battery is discharged. Use the wireless remote control
or the mechanical key to lock or unlock the doors.
● The engine may not start on the first attempt after the battery has recharged
but will start normally after the second attempt. This is not a malfunction.
● The engine switch mode is memorized by the vehicle. When the battery is
reconnected, the system will return to the mode it was in before the battery
was discharged. Before disconnecting the battery, turn the engine switch off.
If you are unsure what mode the engine switch was in before the battery dis-
charged, be especially careful when reconnecting the battery.
● Make sure that the key is not inside the vehicle when recharging or replac-
ing the battery. The key may be locked in the vehicle if the alarm is acti-
vated. ( P. 69)
Page 476 of 496
476
AVALON (U)_(OM41440U)
What 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. 89)
●If you lose your electronic keys, the risk of vehicle theft increases
significantly. Contact your Toyota dealer immediately. ( P. 90)
●Is the electronic key battery weak or depleted? (P. 350)
●Is the engine switch in IGNITION ON mode?
When locking the doors, turn the engine switch off.
(P. 156)
●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. 100)
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