2013 Lexus GS300h key

751 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
Before recharging
When recharging, the 12-volt battery produces hydrogen gas which is flam-
mable and explosive. Therefore, observe the following precautions before
recharging:
If recharging with the 12-volt battery installed on the vehicle, be sure to dis-
connect the ground cable.
Make sure the power switch on the charger is off when connecting and dis-
connecting the charger cables to the 12-volt battery.
After recharging/reconnecting the 12-volt battery
The hybrid system may not start. Follow the procedure below to initialize
the system.
Shift the shift lever to P.
Open and close any of the doors.
Restart the hybrid system.
Unlocking the doors using the smart entry & start system may not be possi-
ble immediately after reconnecting the 12-volt battery. If this happens, use
the wireless remote control or the mechanical key to lock/unlock the doors.
Start the hybrid system with the power switch in ACCESSORY mode. The
hybrid system may not start with the power switch turned off. However, the
hybrid system will operate normally from the second attempt.
The power switch mode is recorded by the vehicle. If the 12-volt battery is
reconnected, the vehicle will return the power switch mode to the status it
was in before the 12-volt battery was disconnected. Make sure to turn off
the power switch before disconnect the 12-volt battery. Take extra care
when connecting the 12-volt battery if the power switch mode prior to dis-
charge is unknown.
If the system will not start even after multiple attempts at all methods above,
contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
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2
3

779 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
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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2
3

7806-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30D53E_(EE)
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.
4

819
7When trouble arises
GS450h_300h_OM_OM30D53E_(EE)7-1. Essential information
Emergency flashers ........... 820
If your vehicle
has to be stopped
in an emergency .............. 8217-2. Steps to take in an emergency
If your vehicle needs
to be towed ..................... 822
If you think something
is wrong .......................... 829
If a warning light turns on
or a warning buzzer
sounds ............................. 830
If a warning message
is displayed ..................... 838
If you have a flat tire (vehicles
with a spare tire) ............. 870
If you have a flat tire (vehicles
without a spare tire) ........ 884
If the hybrid system
will not start .................... 902
If the shift lever cannot be
shifted from P ................. 904
If the parking brake
cannot be released........... 905
If the electronic key does not
operate properly .............. 908
If the 12-volt battery
is discharged ....................911
If your vehicle overheats .. 915
If the vehicle
becomes stuck................. 923

8627-2. Steps to take in an emergency
GS450h_300h_OM_OM30D53E_(EE)
After taking the specified steps to correct the suspected problem,
check that the warning message and light go off.
(If equipped)
Indicates that the pre-
crash safety system is
not currently functional
because the grille cover
or the sensor is dirty
This message also
appears when the
pre-crash safety sys-
tem is not functional
due to overheating.• Check the grille
cover and the sensor
and clean them if
they are dirty.
• In case of overheat-
ing, the system will
become functional
once the system
cools down.
Have the malfunction repaired immediately.
Wa r n i n g m e s s a g eDetailsCorrection procedure
(Flashes)
Inte-
rior
buzzerExterior
buzzerWarning messageDetailsCorrection
procedure
Once
The electronic
key is not
detected when an
attempt is made to
start the hybrid
system.Start the
hybrid sys-
tem with
the elec-
tronic key
present.
(Flashes)

8637-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30D53E_(EE)
Inte-
rior
buzzerExterior
buzzerWarning messageDetailsCorrection
procedure
Once3
times
The electronic
key was carried
outside the vehi-
cle and a door
other than the
driver’s door was
opened and
closed while the
power switch was
in a mode other
than off.
Bring the
electronic
key back
into the
vehicle.
The driver’s door
was opened and
closed while the
electronic key
was not in the
vehicle, the shift
lever was in P and
the power switch
was not turned
off.
Turn the
power
switch off
or bring
the elec-
tronic key
back into
the vehicle.(Flashes)

8647-2. Steps to take in an emergency
GS450h_300h_OM_OM30D53E_(EE)
Inte-
rior
buzzerExterior
buzzerWarning messageDetailsCorrection
procedure
Once
Con-
tinu-
ous
An attempt was
made to exit the
vehicle with the
electronic key and
lock the doors
without first turn-
ing the power
switch off when
the shift lever was
in P.
Turn the
power
switch off
and lock
the doors
again.
9
times
An attempt was
made to drive
when the regular
key was not
inside the vehicle.Confirm
that the
electronic
key is
inside the
vehicle.
Con-
tinu-
ous

The driver’s door
was opened when
the shift lever was
not in P and the
power switch was
not turned off.
Shift the
shift lever
to P.
(Displayed alternately)
(Flashes)
(Flashes)
(Flashes)

8657-2. Steps to take in an emergency
7
When trouble arises
GS450h_300h_OM_OM30D53E_(EE)
Inte-
rior
buzzerExterior
buzzerWarning messageDetailsCorrection
procedure
Con-
tinu-
ousCon-
tinu-
ousThe driver’s door
was opened and
closed while the
electronic key
was not in the
vehicle, the shift
lever was not in P
and the power
switch was not
turned off.•Shift the
shift
lever to
P.
•Bring the
elec-
tronic
key back
into the
vehicle.
Once
Con-
tinu-
ous
(Vehicles with the entry
function)
An attempt was
made to lock the
doors using the
smart entry &
start system while
the electronic key
was still inside
the vehicle.Retrieve
the elec-
tronic key
from the
vehicle and
lock the
doors
again.
(Displayed alternately)
(Flashes)
(Flashes)