2004 Lexus ES330 change key battery

KEYS AND DOORS
18In the following cases, the battery in the key may be
discharged. If this is the case, replace it using a special
screwdriver.
The remote control does not work.
The operational range of wireless remote control becomes
extremely short.
The indicator light on the key is dimmed or does not come
on.
For the replacement of the battery, see Replacing the batteryº
on page 23. You can also have the battery of the key replaced
by your Lexus dealer.
If you lose the wireless key, contact your Lexus dealer as soon
as possible to avoid the possibility of theft, or an accident. (See
If you lose your keys or lock yourself outº on page 342.)
You can use up to 4 wireless remote control keys for the same
vehicle. Contact your Lexus dealer for detailed information.
The wireless remote control key is an electronic
component. Observe the following instructions in order
not to cause damage to the key.
Do not leave the wireless remote control key on places
where the temperature becomes high such as on the
dashboard.
Do not disassemble it.
Avoid knocking it hard against other objects or dropping it.
Avoid putting it in water.
Locking/unlocking the doors
When you push the LOCKº button on the key briefly, all
the doors can be locked from outside the vehicle.
At this time, one beep sounds and the turn signal lights flash
once.* However, when you push the LOCKº button with any
door not closed securely, the buzzer sounds for 10 seconds.**
To stop the buzzer, close all the doors securely or push the
UNLOCKº button. If the key is in the ignition switch, locking
cannot be done.
Make sure all the doors are locked when you leave the vehicle.
Push the LOCKº button once again.
NOTE:
* The turn signal lights can be set not to flash and the beep
volume can be changed.
** The buzzer can be set not to sound if a door is not closed
securely.
Ask your Lexus dealer for details.

KEYS AND DOORS
23
Increase the separation between the equipment
and receiver.
Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.
Consult the dealer or an experienced radio / TV
technician for help.
FCC WARNING:
Changes or modifications not expressly approved
by the party responsible for compliance could void
the user's authority to operate the equipment.
For vehicles sold in Canada
Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2)
this device must accept any interference, including
interference that may cause undesired operation of
the device.
Replacing the battery
When you replace the battery, prepare a lithium battery
CR2016 or equivalent and a special screwdriver.
CAUTION
Special care should be taken to prevent small children
from swallowing the removed battery or components.
NOTICE
When replacing the battery, be careful not to lose the
components.
Replace only with the same or equivalent type
recommended by a Lexus dealer.
Dispose of used batteries according to the local laws.

KEYS AND DOORS
265. Replace the battery case cover.
6. Install the module into the key frame and secure the cover
with the screw.
7. When pushing any button on the wireless key, make sure
the indicator light comes on.
DOORS
Locking with key

1Lock2Unlock
Turn the key towards the front of the vehicle to lock and
towards the back to unlock.
The doors lock and unlock simultaneously with the driver's
door. Turning the key once will unlock the driver's door and
twice in succession will unlock all doors simultaneously.*
NOTE:
* The 2-step unlocking function can be changed.
Ask your Lexus dealer for details.
If a wrong key is used, the key cylinder rotates freely to isolate
inside mechanism. So, door locking is protected from thieves.
The windows and moon roof can be opened from outside the
vehicle using the key. For details, see page 52 and page 100.