2010 Lexus IS250C Owner's Manual

440
4-3. Do-it-yourself maintenance
10_IS250C/350C_U■
Tr u n k
FuseAmpereCircuit
1DEFOG30 ARear window defogger
2ROOF RH30 ARetractable hardtop
3ROOF LH30 ARetractable hardtop
4LGG RH30 ARetractable hardtop
5LGG LH30 ARetractable hardtop
6LGG LCK RH30 ARetractable hardtop
7LGG LCK LH30 ARetractable hardtop
8P-T R AY M A I N30 ARetractable hardtop
9P-T R AY S I D E7. 5 ARetractable hardtop
10PSB30 APre-collision seat belt
■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. 444)
●If the replaced fuse blows again, have the vehicle inspected by your Lexus
dealer.
■If there is an overload in the circuits
The fuses are designed to blow before the entire wiring harness is damaged.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
10_IS250C/350C_U
CAUTION
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failing to do so may cause damage, and possibly a fire or injury.
●Never use a fuse of a higher amperage rating than 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.
This can cause extensive damage or even fire.
●Do not modify fuses or the fuse box.
NOTICE
■Before replacing fuses
Have the cause of electrical overload determined and repaired by your Lexus
dealer.

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4-3. Do-it-yourself maintenance
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Headlight aim
■Removing the engine compartment cover
→ P. 394
■ Vertical movement adjusting bolts
Adjustment bolt A
Adjustment bolt B
■ Before checking the headlight aim
Make sure the vehicle has a full tank of gas and the area around
the headlight is not deformed.
Park the vehicle on level ground.
Sit in the driver’s seat.
Bounce the vehicle several times.
STEP1
STEP2
STEP3
STEP4

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4-3. Do-it-yourself maintenance
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Maintenance and care
10_IS250C/350C_U
■Adjusting the headlight aim
Turn bolt A in either direction
using a Phillips-head screw-
driver.
Remember the turning direction
and the number of turns in mind.
Turn bolt B the same number of
turns and in the same direction
as step 1 using a Phillips-head
screwdriver.
If the error is over the value
specified above, take the vehicle
to your Lexus dealer to adjust
the headlight aim.
STEP1
STEP2

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4-3. Do-it-yourself maintenance
10_IS250C/350C_U
Light bulbs
You may replace the following bulbs yourself. For more information about
replacing other light bulbs, contact your Lexus dealer.
■Preparing a replacement light bulb
Check the wattage of the light bulb being replaced. ( →P. 541)
■ Removing the engine compartment cover
→ P. 394
■ Front bulb locations
■ Rear bulb locations
Parking light
Headlight high
beam
Rear turn signal light Back-up light

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4-3. Do-it-yourself maintenance
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Maintenance and care
10_IS250C/350C_U
Replacing light bulbs■ Headlight high beams
Release the lock and remove the
cover.
Turn the bulb base counterclock-
wise.
Unplug the connector while
depressing the lock release.
STEP1
STEP2
STEP3

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4-3. Do-it-yourself maintenance
10_IS250C/350C_U■
Parking lights
Release the lock and remove the
cover.
Turn the bulb base counterclock-
wise.
Remove the light bulb.
■ Back-up light
Open the trunk lid and remove the
trunk panel cover clips.
STEP1
STEP2
STEP3
STEP1

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Maintenance and care
10_IS250C/350C_UPartly remove the trunk panel
cover and turn bulb bases coun-
terclockwise.
Remove the light bulb.
■ Rear turn si gnal lights
Open the trunk lid and remove the
covers.
Remove the bolts and unit.
STEP2
STEP3
STEP1
STEP2