Lexus GS450h 2008 Using the audio system / LEXUS 2008 GS450H OWNER'S MANUAL (OM30A96U)

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Maintenance and care
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December 27, 2007 1:38 pm
Air conditioning filter
The air conditioning filter must be cleaned or changed regularly to main-
tain air conditioning efficiency.
■ Removal method
Set the air conditio ning system to recirculated mode.
The air conditioning filter case cannot be removed with the system in
the outside air mode.
Turn the “POWER” switch to OFF.
Open the glove box and
remove the partition.
Remove the filter cover.
Press the tabs and remove the
filter case.
STEP1
STEP2
STEP3
STEP4
STEP5

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■Cleaning method
If the filter is dirty, clean by blow-
ing compressed air through the
filter from the downward side.
Hold the air gun 2 in. (5 cm)
from the filter and blow for
approximately 2 minutes at 73
psi (500 kPa, 5.1 kgf/cm
2 or
bar). 
If it is not available, have the filter
cleaned by your Lexus dealer.
■ Replacement method
Remove the air conditioning fil-
ter 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.

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Maintenance and care
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December 27, 2007 1:38 pm
■Checking interval
Inspect and replace the air conditioning filter according to the maintenance sched-
ule. In dusty areas or areas with heavy traffic flow, early replacement may be
required. (For scheduled maintenance information, refer to the “Warranty and Ser-
vices Guide/Owner’s Manual Supplement/Scheduled Maintenance”.)
■If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
NOTICE
■To prevent damage to the system
●When using the air conditioning system, make sure that a filter is always installed.
●When cleaning the filter, do not clean the filter with water.

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4-3. Do-it-yourself maintenance
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December 27, 2007 1:38 pm
Electronic key battery
Replace the battery with a new one if it is discharged.
■You will need the following items:
●Flathead screwdriver
● Small Phillips-head sc rewdriver
● Lithium battery (CR1632)
■ Replacing the battery
Take out the mechanical key.
Remove the cover.
Remove the depleted battery.
Insert a new battery with the “+”
terminal facing up.
STEP1
STEP2
STEP3

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Maintenance and care
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■If the electronic key battery is discharged
The following symptoms may occur.
●The smart access system with push-button start and wireless remote control will
not function properly.
●The operational range is reduced.
■Use a CR1632 lithium battery
●Batteries can be purchased at your Lexus dealer, jewelers, or camera stores.
●Replace only with the same or equivalent type recommended by your Lexus
dealer.
●Dispose of used batteries according to the local laws.
CAUTION
■Removed battery and other parts
Keep away from children. 
These parts are small and if swallowed by a child they can cause choking.
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 comp onents inside the electronic key.
●Do not bend the battery terminals.

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4-3. Do-it-yourself maintenance
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Checking and replacing fuses
If any of the electrical components do not operate, a fuse may have blown.
If this happens, check and replace the fuses as necessary.
Turn the “POWER” switch to OFF.
Remove the engine compartment cover if necessary.
P. 4 2 1
Open the fuse box cover.
■ Engine compartment
Remove the clips.
■ Front controller in the engine compartment fuse box
Lift the lid off while pushing the
tabs on either side.STEP1
STEP2
STEP3

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Maintenance and care
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■Left side instrument panel
Remove the lid.
■ Right side instrument panel
Remove the lid.
■ Luggage compartment
Remove the cover.

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4-3. Do-it-yourself maintenance
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■Luggage compartment (vehicles with active stabilizer suspension
system)
Remove the lid.
After a system failure, see “Fuse la yout and amperage ratings”
( P. 460) for details about which fuse to check.
Remove the fuse with the pull-
out tool.
Check if the fuse has blown.
Type A
Normal fuse
Blown fuse
Replace it with one of an appro-
priate amperage rating. The
amperage rating can be found
on the fuse box lid.
STEP4
STEP5
STEP6

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Maintenance and care
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Type BNormal fuse
Blown fuse
Replace it with one of an appro-
priate amperage rating. The
amperage rating can be found
on the fuse box lid.
Type CNormal fuse
Blown fuse
Contact your Lexus dealer.
Type DNormal fuse
Blown fuse
Contact your Lexus dealer.

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Fuse layout and amperage ratings■ Engine compartment
FuseAmpereCircuit
1FR CTRL-B25H-LP HI, HORN
2RELIEF VLV10Fuel system
3ETCS10
Multiport fuel injection system/
sequential multiport fuel injection
system
4H-LP CLN30Headlight cleaner
5STB-AM30Active stabilizer suspension system
6DEICER25
7FR CTRL-AM30FR TAIL, FR FOG, WASH