battery Lexus GS300h 2013 Repair Manual

739 6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
GS450h
12-volt battery
P. 7 4 9
Engine oil level dipstick
(P. 741)
Engine coolant reservoir
(P. 744)
Engine oil filler cap (P.
742)
Power control unit coolant
reservoir (P. 745)Fuse box (P. 782)
Washer fluid tank (P. 748)
Electric cooling fans
Condenser (P. 747)
Radiator (P. 747)1
2
3
4
5
6
7
8
9

749 6-3. Do-it-yourself maintenance
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Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
12-volt battery
The 12-volt battery is located on
the left-hand side of luggage
compartment.
Pull the strap upwards to lift up
the 12-volt battery cover.
Make sure that the 12-volt battery terminals are not corroded and
that there are no loose connections, cracks, or loose clamps.
Te r m i n a l s
Hold-down clamp
Location
Removing the 12-volt battery cover
Exterior
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7506-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30D53E_(EE)
The meanings of each caution symbol on the top of the 12-volt bat-
tery are as follows:
Caution symbols
No smoking, no naked
flames, no sparks12-volt battery acid
Shield eyesNote operating instruc-
tions
Keep away from chil-
drenExplosive gas

751 6-3. Do-it-yourself maintenance
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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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3

7526-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
Chemicals in the 12-volt battery
The 12-volt battery contains poisonous and corrosive sulfuric acid and may
produce hydrogen gas which is flammable and explosive. To reduce the
risk of death or serious injury, take the following precautions while work-
ing on or near the 12-volt battery:
Do not cause sparks by touching the 12-volt battery terminals with tools.
Do not smoke or light a match near the 12-volt battery.
Avoid contact with eyes, skin and clothes.
Never inhale or swallow electrolyte.
Wear protective safety glasses when working near the 12-volt battery.
Keep children away from the 12-volt battery.
Where to safely charge the 12-volt battery
Always charge the 12-volt battery in an open area. Do not charge the 12-
volt battery in a garage or closed room where there is insufficient ventila-
tion.
How to recharge the 12-volt battery
Recharge at a current of 5 A or less and make sure that the recharging
period does not exceed a total of 12 hours.

753
6 6-3. Do-it-yourself maintenance
Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
Emergency measures regarding electrolyte
If electrolyte gets in your eyes
Flush your eyes with clean water for at least 15 minutes and get immedi-
ate medical attention. If possible, continue to apply water with a sponge or
cloth while traveling to the nearest medical facility.
If electrolyte gets on your skin
Wash the affected area thoroughly. If you feel pain or burning, get medical
attention immediately.
If electrolyte gets on your clothes
It can soak through clothing on to your skin. Immediately take off the
clothing and follow the procedure above if necessary.
If you accidentally swallow electrolyte
Drink a large quantity of water or milk. Get emergency medical attention
immediately.
When replacing the 12-volt battery
Use a 12-volt battery designed for this vehicle. Failure to do so may cause
gas (hydrogen) to enter the passenger compartment, causing a fire or explo-
sion.
For replacement of the 12-volt battery, contact any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional.
NOTICE
When recharging the 12-volt battery
Never recharge the 12-volt battery while the hybrid system is operating.
Also, be sure all accessories are turned off.

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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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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.
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Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
Removed battery and other parts
These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. Failure to do so could result in death or serious
injury.
Lithium battery precautions
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCOR-
RECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUC-
TIONS
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 component inside the remote control.
Do not bend either of the battery terminals.

785 6-3. Do-it-yourself maintenance
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Maintenance and care
GS450h_300h_OM_OM30D53E_(EE)
Trunk
Push the tab in and lift the lid
off.
Remove the lid.
The upper part of the 12-volt battery
Pull the strap upwards to lift
up the 12-volt battery cover.
Remove the fuse with the pull-
out tool.
Only type A fuse can be removed
using the pullout tool.
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