2008 TOYOTA AVALON key battery

78 1-6. Theft deterrent system
AVALON_U_(L/O_0802)
■Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure
of the following:
● Nobody is in the vehicle.
● The windows and moon roof are closed before the alarm is set.
● No valuables or other personal items are left in the vehicle.
■ Triggering of the alarm
The alarm may be triggered in the following situations. 
(Stopping the alarm deactivates the alarm system.)
● A person inside the vehicle opens a door, the trunk or hood.
● The battery is recharged or replaced when the vehicle is locked.
■ Panic mode
Vehicles with smart key system
Vehicles without smart key system
When is pushed for longer than
about one second, an alarm will sound for
about 60 seconds and the vehicle lights
will flash to deter any person from trying
to break into or damage your vehicle.
To stop the alarm, push any button on the
wireless remote control.

124 2-1. Driving procedures
AVALON_U_(L/O_0802)
■When the steering lock cannot be released
■ If the engine does not start
The engine immobilizer system may not have been deactivated. ( P. 75)
■ When the “ENGINE START STOP” switch indicator flashes in amber
The system may be malfunctioning. Have the vehicle inspected by your Toy-
ota dealer immediately.
■ Auto power OFF function
The “ENGINE START STOP” switch will automatically turn OFF when left in
ACC mode for 1 hour or more.
■ Electronic key battery depletion
 P. 3 0
■ When the electronic key battery is discharged
 P. 340
■ Conditions affecting operation
 P. 2 8
■ Leak detection pump
Several hours after the engine is turned off, you may hear a sound coming
from underneath the luggage compartment for several minutes. This is nor-
mal operation and does not indicate a malfunction.
The green indicator light on the “ENGINE
START STOP” switch will flash. Press the
“ENGINE START STOP” switch again
while turning the steering wheel slightly in
either direction.

128 2-1. Driving procedures
AVALON_U_(L/O_0802)
NOTICE
■To prevent battery discharge
Do not leave the key in the “ACC” or “ON” position for long periods without
the engine running.
■ When starting the engine
● Do not crank for more than 30 seconds at a time. This may overheat the
starter and wiring systems.
● Do not race the cold engine.
● If the engine becomes difficult to start or stalls frequently, have the engine
checked immediately.

144 2-3. Operating the lights and windshield wipers
AVALON_U_(L/O_0802)
■Daytime running light system (if equipped)
To make your vehicle more visible to other drivers, the headlights turn on
automatically (at a reduced intensity) whenever the engine is started and the
parking brake is released. Daytime r unning lights are not designed for use at
night.
■ Headlight control sensor
■ Automatic light off system
The headlights and tail lights turn off 30 seconds after a door is opened or
closed if the “ENGINE START STOP” switch or the engine switch has been
switched to ACC or turned OFF while the headlights are turned on. (The
lights turn off immediately if the button on the key is pressed after all
doors are locked.)
To turn the lights on again, switch to ON mode, or turn the light switch OFF
once and then back to the
or position.
■ Customization that can be co nfigured at Toyota dealer
Settings (e.g. light sensor sensitivity) can be changed. 
(Customizable features P. 429)
NOTICE
■To prevent battery discharge
Do not leave the lights on longer than necessary if the engine is not running.
The sensor may not function properly if
an object is placed on the sensor, or any-
thing that blocks the sensor is affixed to
the windshield. 
Doing so interferes with the sensor
detecting the level of ambient light and
may cause the automatic headlight con-
trol system to malfunction.

Maintenance and care4
287
AVALON_U_(L/O_0802)
4-1. Maintenance and care ... 288Cleaning and protecting the 
vehicle exterior............... 288
Cleaning and protecting the 
vehicle interior................ 291 4-2. Maintenance ................... 294
Maintenance 
requirements .................. 294
General maintenance....... 296
Emission inspection and 
maintenance (I/M) 
programs ........................ 299
4-3. Do-it-yourself 
maintenance ................. 300
Do-it-yourself service 
precautions .................... 300
Hood ................................ 303
Positioning a floor jack ..... 304
Engine compartment ........ 306
Tires ................................. 322
Tire inflation pressure ...... 331
Wheels ............................. 335
Air conditioning filter......... 337
Key battery ....................... 340
Checking and replacing 
fuses .............................. 344
Headlight aim (with 
discharge headlights) ..... 353
Light bulbs........................ 355

340
4-3. Do-it-yourself maintenance
AVALON_U_(L/O_0802)
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-hea d screwdriver
● Lithium battery CR1632 (vehicles with smart key system),
CR2016 (vehicles withou t smart key system)
■ Replacing the battery (vehicles with smart key system)
Take out the mechanical key.
Remove the cover.
STEP1
STEP2

4
Maintenance and care
341
4-3. Do-it-yourself maintenance
AVALON_U_(L/O_0802)
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.
STEP3
STEP1
STEP2

342 4-3. Do-it-yourself maintenance
AVALON_U_(L/O_0802)
■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 smar t 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 Toy-
ota 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.
STEP3