Lexus GS450h 2007 Using the audio system / LEXUS 2007 GS450H THROUGH JUNE 2006 PROD. OWNER'S MANUAL (OM30727U)

411
4-3. Do-it-yourself maintenance
4
Maintenance and care
Headlight aim
■Adjustment bolts
For high beam
For low beam
■ Ga
uges
Vertical movement gauges
Horizontal movement
gauges
■ Befor
e checking the headlight aim
Make sure the vehicle has a full ta nk of gas and the ar
ea 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

412
4-3. Do-it-yourself maintenance
■Adjusting the headlight aim
While watching the gauges, use
a Phillips-head screwdriver to
turn each adjustment the bolt so
that for vertical adjustment the
bubble is in the center of the
gauge, and for horizontal
adjustment the gauge reads “0”.
If you feel that there is a large
deviation, take the vehicle to
your Lexus dealer to adjust the
headlight aim.

413
4-3. Do-it-yourself maintenance
4
Maintenance and care
Light bulbs
You may replace the following bulbs yourself. For more information about
replacing other light bulbs, contact your Lexus dealer.
■Prepare a replacement light bulb.
Check the wattage of the light bulb being replaced. ( P.
4 8 8 )
■ R
emove the engine compartment cover if necessary.
 P.
3 6 2
■ F
ront bulb locations
■Rear bulb locations
Parking light
Headlight high beam
Rear turn signal light Back-up light

414
4-3. Do-it-yourself maintenance
Replacing light bulbs
■Headlight high beam
Unplug the connector while push-
ing the lock release.
Turn the bulb base counterclock -
wise to remove it.
STEP1
STEP2

415
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Parking light
Turn the bulb base counterclock-
wise.
Remove the light bulb.
■ B
ack-up light
Open the trunk lid. Remove the
trunk handle and panel co
ver clips.
Partly remove the trunk panel
co
ver and turn bulb bases coun -
terclockwise.
STEP1
STEP2
STEP1
STEP2

416
4-3. Do-it-yourself maintenance
Remove the light bulb.
■ R
ear turn signal light
Open the trunk lid and remove the
co
ver.
Turn the bulb base counterclock -
wise.
Remove the light bulb.
STEP3
STEP1
STEP2
STEP3

417
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Bulbs other than the above
If any of the bulbs listed below has burnt out, have your Lexus dealer
r

eplace it.
● Headlight lo
w beams (high-intensity discharge bulbs)
● F
og lights
●F
ront turn signal lights
●F
ront side marker lights
●Stop
/tail lights
●T
ail lights
●R
ear side marker lights
●High mounted stoplight
● License plate lights
■Condensation build-up on the inside of the lens
Contact your Lexus dealer for more inform ation i
n the following situations. Tempo-
rary condensation build-up on the inside of the headlight lens does not indicate a
ma
lfunction.
●Large drops of water are built up on the inside of the lens.
●Water has built up in side the headlight.
■LED light bulbs
The tail, tail/stop and high mounted stopligh ts co
nsist of a number of LEDs. If any
LEDs burn out, take your vehicle to your Lexus dealer to have the light replaced.
If two or more LEDs in a stoplight burn out, y
our vehicle may not conform to local
laws (SAE).
■High-intensity discharge (HID) headlights
If voltage to the high-intensity discharge bu l
bs is insufficient, the light may not come
on, or may go out temporarily. The high-i ntensity discharge bulbs will come on
when normal power is restored.

418
4-3. Do-it-yourself maintenance
CAUTION
■Replacing light bulbs
●Turn off the headlights. Do not attempt to replace the bulb immediately after turn-
ing off the headlights. 
The bulbs become very hot and may cause burns.
●Do not touch the glass portion of the light bulb with bare hands. Hold the bulb by
the plastic or metal portion. 
If the bulb is scratched or dropped it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failing to do so may
result in heat damage, fire, or water ente ring the headlight unit. This may damage
the headlights or cause condensation to build up on the lens.
●Do not attempt to repair or disassemble lig ht bulbs, connectors, electric circuits
or component parts. 
Doing so may result in serious injury due to electric shock.
■High-intensity discharge (HID) headlights
●Contact your Lexus dealer before replac ing high-intensity discharge headlights
(including light bulbs).
●Do not touch the high voltage socket while the headlights are turned on.
20000V is momentarily generated and ma y cause severe injury by electric
shock.
■To prevent damage or fire
Make sure bulbs are fully seated and locked.

When trouble arises5
419
5-1. Essential information ........... 420If your vehicle needs to be 
towed........................................... 420
If you think something is 
wrong .......................................... 427
Event data recorder ................. 428 5-2. Steps to take in an

emergency............................ 430
If a warning light turns on or a 
warning buzzer sounds............ 430
If a warning message is 
displayed.................................... 436
If you have a flat tire 
(Vehicles with run-flat 
tires) ............................................. 455
If you have a flat tire 
(Vehicles with standard 
tires) ............................................. 456
If the hybrid system will not 
start .............................................. 466
If the shift lever cannot be 
shifted from P........................... 467
If you lose your keys ................. 468
When the electronic key  battery is discharged ............ 469
If the 12 volt battery is 
discharged .................................. 471
If your vehicle overheats ........ 475
If the vehicle becomes 
stuck ............................................ 478

420
5-1. Essential information
If your vehicle needs to be towed
Before towing
The following may indicate a problem with your transmission. Contact
your Lexus dealer before towing.
● The hybrid s
ystem is running, but the vehicle will not move.
● The v
ehicle makes an abnormal sound.
Emergency towing
If a tow truck is not available, in an emergency your vehicle may be tem-
porarily towed using a cable or ch ain secur
ed to the emergency towing
eyelet. This should only attempted on hard, surfaced roads for short dis-
tances at low speeds. 
A driver must be in the vehicle to steer and oper
ate the brakes. The vehi-
cle’s wheels, drive train, axles, steering and br
akes must be in good condi -
tion.
If towing is necessary, we recommen d having your vehicle towed by your
Lexus dealer or a commercial towing service, using a lift-type truck or a flat
bed truck.

Use a safety chain system for all towing , a
nd abide by all state/provincial
and local laws.
The wheels and axle on the ground must be in good condition.
If they are damaged, use a to wing dolly
or flat bed truck.