2007 Lexus GS450h maintenance

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4-3. Do-it-yourself maintenance
4
Maintenance and care
Electronic key battery
Replace the battery with a new one if it is discharged.
■You will need the following items:
●F
lathead screwdriver
●Small Phillips-head sc rewd
river
● Lithium batter
y (CR1632)
■ R
eplacing 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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4-3. Do-it-yourself maintenance
■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 a 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
4
Maintenance and care
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” mode.
Remove the engine compartment cover if necessary.
P. 3 6 2
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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4-3. Do-it-yourself maintenance
Driver's side instrument panel
Remove the lid.
Passenger's side instrument panel Remove the lid.
Luggage compartment Remove the cover.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
Luggage compartment (vehicles with active stabilizer suspension
system)
Remove the lid.
After a system failure, see “Fuse la y
out and amperage ratings”
( P. 4 0 0 ) for details about which fuse to check.
Remove the fuse with the pull-
out tool.STEP4
STEP5

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4-3. Do-it-yourself maintenance
Check if the fuse has blown.
Type ANormal fuse
Blown fuse
Replace it with one of an appro-
priate amperage rating. The
amper
age rating can be found
on the fuse box lid.
Type B
Normal fuse
Blown fuse
Replace it with one of an appro-
priate amperage rating. The
amper
age rating can be found
on the fuse box lid.
Type C
Normal fuse
Blown fuse
Contact your Lexus dealer.
STEP6

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4-3. Do-it-yourself maintenance
4
Maintenance and care
Type D
Normal fuse
Blown fuse
Contact your Lexus dealer.

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4-3. Do-it-yourself maintenance
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