2012 Lexus GS250 key battery

6456-1. Maintenance and care
6
Maintenance and care
GS350/250_EE (OM30C36E)
When using a car wash
If the door handle becomes wet while the electronic key is within the effec-
tive range, the door may lock and unlock repeatedly. In that case, follow the
following correction procedures to wash the vehicle:
Place the key in a position 2 m (6 ft.) or more separate from the vehicle
while the vehicle is being washed. (Take care to ensure that the key is not
stolen.)
Set the electronic key to battery-saving mode to disable the smart entry &
start system. (P. 1 2 9 )
Aluminum wheels
Remove any dirt immediately by using a neutral detergent. Do not use hard
brushes or abrasive cleaners. Do not use strong or harsh chemical cleaners.
Use the same mild detergent and wax as used on the paint.
Do not use detergent on the wheels when they are hot, for example after
driving for long distance in the hot weather.
Wash detergent from the wheels immediately after use.
Bumpers
Do not scrub with abrasive cleaners.
Front side windows water-repellent coating
The following precautions can extend the effectiveness of the water-repel-
lent coating.
• Remove any dirt, etc. from the front side windows regularly.
• Do not allow dirt and dust to accumulate on the windows for a long
period.
Clean the windows with a soft, damp cloth as soon as possible.
• Do not use wax or glass cleaners that contain abrasives when cleaning
the windows.
• Do not use any metallic objects to remove condensation build up.
When the water-repellent performance has become insufficient, the coating
can be repaired. Contact any authorized Lexus dealer or repairer, or another
duly qualified and equipped professional.
Outside rear view mirror rain-clearing coating (if equipped)
Observe the following precautions in order to retain the rain-clearing proper-
ties of the mirrors:
Clean the mirrors using a car shampoo or glass cleaner that does not contain
silicone or an abrasive compound, and rinse thoroughly with water.
Allow the mirrors to be exposed to direct sunlight for 1 to 2 days.

669 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)
Before recharging
When recharging, the battery produces hydrogen gas which is flammable and
explosive. Therefore, observe the following before recharging:
If recharging with the battery installed on the vehicle, be sure to disconnect
the ground cable.
Make sure the power switch on the charger is off when connecting and dis-
connecting the charger cables to the battery.
After recharging/reconnecting the battery
The engine may not start. Follow the procedure below to initialize the sys-
tem.
Shift the shift lever to P.
Open and close any of the doors.
Restart the engine.
Unlocking the doors using the smart entry & start system may not be possi-
ble immediately after reconnecting the battery. If this happens, use the wire-
less remote control or the mechanical key to lock/unlock the doors.
Start the engine with the engine switch in ACCESSORY mode. The engine
may not start with the engine switch turned off. However, the engine will
operate normally from the second attempt.
The engine switch mode is recorded by the vehicle. If the battery is recon-
nected, the vehicle will return the engine switch mode to the status it was in
before the battery was disconnected. Make sure to turn off the engine before
disconnect the battery. Take extra care when connecting the battery if the
engine switch mode prior to discharge is unknown.
If the system will not start even after multiple attempts, contact any autho-
rized Lexus dealer or repairer, or another duly qualified and equipped profes-
sional.
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697 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS350/250_EE (OM30C36E)
Electronic key battery
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 battery cover.
To prevent damage to the key,
cover the tip of the screwdriver
with a rag.
Replace the battery with a new one if it is depleted.
You will need the following items:
Replacing the battery
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6986-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)Remove the depleted battery.
Insert a new battery with the “+”
terminal facing up.
Use a CR2032 lithium battery
Batteries can be purchased at any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional, 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.
When the card key battery needs to be replaced (if equipped)
The battery for the card key is available only at Lexus dealers. Your Lexus
dealer can replace the battery for you.
If the electronic key battery is depleted
The following symptoms may occur:
The smart entry & start system and wireless remote control will not func-
tion properly.
The operational range will be reduced.
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737
7When trouble arises
GS350/250_EE (OM30C36E)
7-1. Essential information
Emergency flashers ........... 738
If your vehicle
has to be stopped
in an emergency .............. 7397-2. Steps to take in an emergency
If your vehicle needs
to be towed ..................... 740
If you think something
is wrong .......................... 747
Fuel pump shut off system 748
If a warning light turns on or
a warning buzzer sounds 749
If a warning message
is displayed ..................... 757
If you have a flat tire (vehicles
with a spare tire) ............. 782
If you have a flat tire (vehicles
without a spare tire) ........ 797
If the engine will not start . 815
If the shift lever cannot be
shifted from P ................. 817
If the parking brake
cannot be released........... 818
If the electronic key does not
operate properly .............. 821
If the vehicle battery
is discharged ................... 824
If your vehicle overheats .. 829
If the vehicle
becomes stuck................. 832

7807-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
Inte-
rior
buzzerExterior
buzzerWarning messageDetailsCorrection
procedure

Power was turned
off due to the
automatic power
off function.
Next time
when start-
ing the
engine,
increase
the engine
speed
slightly
and main-
tain that
level for
approxi-
mately 5
minutes to
recharge
the battery.
Once
The electronic
key has a low bat-
tery.
Replace
the elec-
tronic key
battery.
(P. 697)

8167-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
If the engine will not start
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 proce-
dures. (P. 207)
There may be a malfunction in the engine immobilizer system.
(P. 80)
One of the following may be the cause of the problem:
The battery may be discharged. (P. 825)
The battery terminal connections may be loose or corroded.
The engine starting system may be malfunctioning due to an elec-
trical problem such as electronic key battery depletion or a blown
fuse. However, an interim measure is available to start the engine.
(P. 817)
If the engine will not start even though correct starting procedures
are being followed (P. 207), consider each of the following
points:
The engine will not start even though the starter motor oper-
ates normally.
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.
The starter motor does not turn over

8227-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
If the electronic key does not operate properly
Doors
Use the mechanical key
(P. 119) in order to perform
the following operations:
Locks all the doors
Closes the windows and
moon roof (turn and hold)
*
Unlocks all the doors
Opens the windows and
moon roof (turn and hold)
*
*
: This setting must be customized
at any authorized Lexus dealer
or repairer, or another duly qual-
ified and equipped professional.
If communication between the electronic key and vehicle is inter-
rupted (P. 130) or the electronic key cannot be used because the
battery is depleted, the smart entry & start system and wireless
remote control cannot be used. In such cases, the doors and trunk
can be opened and the engine can be started by following the pro-
cedure below.
Locking and unlocking the doors, unlocking the trunk and key
linked functions
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