2017 Lexus GS300h maintenance

4346-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30F92E_(EE) Remove the air conditioning filter
from the filter case and replace it
with a new one.
The “
UP” marks shown on the filter
and the filter case should be pointing up.
■Changing interval
Inspect and replace the air conditioning filt er according to the maintenance schedule. In
dusty areas or areas with heavy traffic flow, early replacement may be required. (For
scheduled maintenance information, please refer to the “Lexus Service Booklet” or
“Lexus Warranty Booklet”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
■Air conditioning filter with deodorizing function
When fragrances are placed in your vehicle, the deodorizing effect may become signifi-
cantly weakened in a short period.
When an air conditioning odor comes out cont inuously, replace the air conditioning filter.
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NOTICE
■When using the air conditioning system
When fragrances are placed in your vehicle, the deodorizing effect may become sig-
nificantly weakened in a short period.
When an air conditioning odor comes out continuously, replace the air conditioning fil-
ter.

435
6
6-3. Do-it-yourself maintenance
Maintenance and care
GS450h_300h_OM_OM30F92E_(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 th e following items:
Replacing the battery
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4366-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30F92E_(EE) Remove the depleted battery.
Insert a new battery with the “+” termi-
nal facing up.
■Use a CR2032 lithium battery
●Batteries can be purchased at any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer, local el
ectrical appliance shops or camera stores.
●Replace only with the same or equivalent type recommended by the manufacturer.
●Dispose of used batteries according to the 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 function properly.
●The operational range will be reduced.
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WARNING
■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
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS
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.

437
6
6-3. Do-it-yourself maintenance
Maintenance and care
GS450h_300h_OM_OM30F92E_(EE)
Checking and replacing fuses
Turn the power switch off.
Open the fuse box cover.
Engine compartment:
Remove the engine compartment
cover ( P. 405) and remove all of the
clips.
Push the tabs on either side to detach
the lock and lift the lid off while pulling
the lock plate.
When installing the lid, check that the
lock plate and the tabs on either side are
connected correctly.
If any of the electrical components do not operate, a fuse may have blown. If
this happens, check and repl ace the fuses as necessary.
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4386-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30F92E_(EE)
Left side instrument panel
(left-hand drive vehicles)Left side instrument panel
(right-hand drive vehicles)
Remove the lid. Remove the lid.
Right side instrument panel
(left-hand drive vehicles)Right side instrument panel
(right-hand drive vehicles)
Remove the lid. Remove the lid.

439
6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30F92E_(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. When one or more of the fuses in this
unit are blown, the unit needs to be
replaced as a whole.
Remove the fuse with the pullout
tool.
Only type A fuse can be removed using
the pullout tool.
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4406-3. Do-it-yourself maintenance
GS450h_300h_OM_OM30F92E_(EE) Check if the fuse is blown.
Normal fuse
Blown fuse
Type A and B:
Replace the blown fuse with a new fuse of an appropriate amperage rating. The
amperage rating can be found on the fuse box lid.
Type C and D:
Contact any authorized Lexus retailer or Le xus authorized repairer, or any reliable
repairer.
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1
2
Type AType B
Type CType D

441
6-3. Do-it-yourself maintenance
6
Maintenance and care
GS450h_300h_OM_OM30F92E_(EE)
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may need
replacement. ( P. 442)
●If the replaced fuse blows again, have the vehicle inspected by any authorized Lexus
retailer or Lexus authorized repa irer, or any reliable repairer.
■If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness from damage.
■When replacing light bulbs
Lexus recommends that you us e genuine Lexus products designed for this vehicle.
Because certain bulbs are connected to circuits designed to prevent overload, non-gen-
uine parts or parts not designed for this vehicle may be unusable.
WARNING
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failure to do so may cause damage to the vehicle, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than that indicated, or use any other
object in place of a fuse.
●Always use a genuine Lexus fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
●Do not modify the fuses or fuse boxes.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer as soon as possible.