Page 428 of 564
428
4-3. Do-it-yourself maintenance
AVALON_U (OM41428U)
Key batter y
Replace the battery with a new one if it is discharged.
■You will need the following items:
●Flathead screwdriver (To prevent damage to the key, cover
the tip of the screwdriver with rag.)
●Small Phillips-head screwdriver
●Lithium battery CR1632 (vehicles with smart key system),
CR2016 (vehicles without smart key system)
■Replacing the battery (vehicles with smart key system)
Take out the mechanical key.
Remove the cover.
Page 429 of 564
4
Maintenance and care
429 4-3. Do-it-yourself maintenance
AVALON_U (OM41428U)
Remove the depleted battery.
Insert a new battery with the
“+” terminal facing up.
■Replacing the battery (vehicles without smart key system)
Remove the cover.
Remove the module.
Page 430 of 564
430 4-3. Do-it-yourself maintenance
AVALON_U (OM41428U)
■If the key battery is discharged
The following symptoms may occur.
●The smart key system and wireless remote control will not function prop-
erly.
●The operational range is reduced.
■Use a CR1632 (vehicles with smart key system), or CR2016 (vehicles
without smart key system) lithium battery
●Batteries can be purchased at your Toyota dealer, jewelers, or camera
stores.
●Replace only with the same or equivalent type recommended by a
Toyota dealer.
●Dispose of used batteries according to the local laws.
CAUTION
■Removed battery and other parts
Keep away from children.
These parts are small and if swallowed by a child they can cause choking.
Open the case cover using a
coin protected with tape etc.
and remove the depleted bat-
tery.
Insert a new battery with the
“+” terminal facing up.
Page 431 of 564
4
Maintenance and care
431 4-3. Do-it-yourself maintenance
AVALON_U (OM41428U)
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 components inside the remote control.
●Do not bend the battery terminals.
Page 457 of 564
When trouble arises5
457
AVALON_U (OM41428U)
5-1. Essential information
Emergency flashers ......... 458
If your vehicle needs
to be towed .................... 459
If you think something is
wrong ............................. 463
Fuel pump shut off
system ........................... 464
Event data recorder ......... 465
5-2. Steps to take in an
emergency
If a warning light turns
on or a warning buzzer
sounds... ........................ 467
If you have a flat tire......... 479
If the engine will
not start .......................... 489
If the shift lever cannot
be shifted from P ............ 491
If you lose your keys ........ 492
If the electronic key does
not operate properly (with
smart key system) .......... 493
If the vehicle battery is
discharged ..................... 496
If your vehicle
overheats ....................... 500
If the vehicle becomes
stuck .............................. 503
If your vehicle has to be
stopped in an
emergency ..................... 504
Page 458 of 564
458
AVALON_U (OM41428U)
5-1. Essential information
Emergency flashers
NOTICE
■To prevent battery discharge
Do not leave the emergency flashers on longer than necessary when the
engine is not running.
Use the emergency flashers if the vehicle malfunctions or is
involved in an accident.
Press the switch to flash all
the turn signal lights. To turn
them off, press the switch
once again.
Page 472 of 564
472 5-2. Steps to take in an emergency
AVALON_U (OM41428U)
Have the malfunction repaired immediately. (vehicles with smart
key system)
After taking the specified steps to correct the suspected problem,
check that the warning light turn off.
Interior
buzzerExterior
buzzerWarning lightDetailsCorrection
procedure
Once
(Flashing)
The electronic key
is not detected
when attempting to
start the engine.
• Confirm the
location of the
electronic key.
• The electronic
key battery
maybe dis-
charged.
(P. 428)
Once3 times
(Flashing)
An open door
other than the
driver’s door is
closed while the
electronic key is
outside the detec-
tion range and the
“ENGINE START
STOP” switch is in
ACCESSORY or
IGNITION ON
mode.
Confirm the
location of the
electronic key.
Page 489 of 564

5
When trouble arises
489
5-2. Steps to take in an emergency
AVALON_U (OM41428U)
If the engine will not star t
If the engine will not start even though correct starting procedures
are being followed (
P. 149, P. 153), consider each of the following
points.
■The engine will not start even when the starter motor oper-
ates normally
One of the following may be the cause of the problem.
●There may not be sufficient fuel in the vehicle’s tank.
Add fuel to the vehicle.
●The engine may be flooded.
Try to restart the engine once more following correct starting
procedures. (P. 149)
●There may be a malfunction in the engine immobilizer system.
(P. 9 1 )
■The starter motor turns over slowly, the interior lights and
headlights are dim, or the horn does not sound or sounds at
a low volume
One of the following may be the cause of the problem.
●The battery may be discharged. (P. 496)
●The battery terminal connections may be loose or corroded.
■The starter motor does not turn over (vehicles with smart
key system).
The engine starting system may be malfunctioning due to an
electrical problem such as an open circuit or a blown fuse. How-
ever, an interim measure is available to start the engine.
(P. 149)