2013 Lexus GS450h headlights

GS450h_U (OM30D01U)
6976-3. Do-it-yourself maintenance
6
Maintenance and care
■Replacing the following bulbs
If any of the lights listed below has burnt out, have it replaced by your
Lexus dealer.
●Headlights
●Parking lights and daytime running lights
●Front side marker lights
●Side turn signal lights
●Stop/tail lights
●Tail lights
●Rear side marker lights
●High mounted stoplight
●License plate lights
●Outer foot lights
■Discharge headlights (if equipped)
If voltage to the discharge bulbs is insufficient, the bulbs may not come on, or may go
out temporarily. The discharge bulbs will come on when normal power is restored.
■LED Lights
The lights other than the discharge headligh ts (if equipped), fog lights (if equipped),
front turn signal lights, rear turn signal lights, back-up lights and outer foot lights each
consist of a number of LEDs. If any of the LEDs burn out, take your vehicle to your
Lexus dealer to have the light replaced.
■Condensation build-up on the inside of the lens
Contact your Lexus dealer for more information in the following situations. Tempo-
rary condensation build-up on the inside of the headlight lens does not indicate a
malfunction.
●Large drops of water have built up on the inside of the lens.
●Water has built up inside the headlight.
■When replacing light bulbs
 P. 6 8 4

698
GS450h_U (OM30D01U)
6-3. Do-it-yourself maintenance
CAUTION
■Replacing light bulbs
●Turn off the lights. Do not attempt to replace the bulb immediately after turning
off the lights.
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 drop ped, it may blow out or crack.
●Fully install light bulbs and any parts used to secure them. Failure to do so may
result in heat damage, fire, or water en tering the headlight unit. This may damage
the headlights or cause condensati on to build up on the lens.
●Vehicles with discharge headlights: While
the headlights are turned on, and for a short
time after they have been turned off, metal
components at the rear of the headlight
assembly will be extremely hot. To prevent
burns, do not touch these metal compo-
nents until you are certain they have cooled
down.
Metal components

GS450h_U (OM30D01U)
6996-3. Do-it-yourself maintenance
6
Maintenance and care
CAUTION
■Discharge headlights (if equipped)
●Contact your Lexus dealer before replacing the discharge headlights (including
light bulbs).
●Do not touch the discharge headlight’s high voltage socket when the headlights
are turned on.
An extremely high voltage of 30000 V wi ll be discharged and could result in
death or serious injury by electric shock.
●Do not attempt to take apart or repair the headlight bulbs, connectors, power
supply circuits, or related components.
Doing so could result in electric shock and death or serious injury.
■To prevent damage or fire
●Make sure bulbs are fully seated and locked.
●Check the wattage of the bulb before installing to prevent heat damage.

762
GS450h_U (OM30D01U)
7-2. Steps to take in an emergency
If the hybrid system will not start
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly. (P. 76 8 )
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●There may be a malfunction in the immobilizer system. ( P. 7 9 )
●There may be a malfunction in the steering lock system.
●The hybrid system may be malfunctio ning due to an electrical problem
such as electronic key battery de pletion or a blown fuse. However,
depending on the type of malfuncti on, an interim measure is available
to start the hybrid system. ( P. 763)
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( P. 770)
●The 12-volt battery terminal connecti ons may be loose or corroded.
Reasons for the hybrid system not st arting vary depending on the situa-
tion. Check the following and perf orm the appropriate procedure:
The hybrid system will not start even though the correct starting
procedure is being followed. ( P. 1 8 9 )
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

7637-2. Steps to take in an emergency
GS450h_U (OM30D01U)
7
When trouble arises
One of the following may be the cause of the problem:
●One or both of the 12-volt battery terminals may be disconnected.
●The 12-volt battery may be discharged. ( P. 770)
Contact your Lexus dealer if the problem cannot be repaired, or if repair proce-
dures are unknown.
When the hybrid system does not start, the following steps can be used as
an interim measure to star t the hybrid system if the power switch is func-
tioning normally:
Set the parking brake.
Shift the shift lever to P.
Turn the power switch to ACCESSORY mode.
Press and hold the power switch fo r about 15 seconds while depressing
the brake pedal firmly.
Even if the hybrid system can be star ted using the above steps, the system
may be malfunctioning. Have the vehicle inspected by your Lexus dealer.
The interior lights and headlights do not turn on, or the horn does
not sound.
Emergency start function
1
2
3
4

7717-2. Steps to take in an emergency
GS450h_U (OM30D01U)
7
When trouble arises
Start the engine of the second vehicle. Increase the engine speed
slightly and maintain at that le vel for approximately 5 minutes to
recharge the 12-volt battery of your vehicle.
Open and close any of th e doors of your vehicle with the power switch
off.
Maintain the engine speed of the se cond vehicle and start the hybrid
system of your vehicle by turning the power switch to ON mode.
Make sure the “READY” indicator co mes on. If the indicator does not
come on, contact your Lexus dealer.
Once the hybrid system has started, remove the jumper cables in the
exact reverse order from wh ich they were connected.
Once the hybrid system starts, have the vehicle inspected at your Lexus
dealer as soon as possible.
■Starting the hybrid system when the 12-volt battery is discharged
The hybrid system cannot be started by push-starting.
■To prevent 12-volt battery discharge
●Turn off the headlights and the audio system while the hybrid system is off.
●Turn off any unnecessary electrical compon ents when the vehicle is running at a
low speed for an extended period, such as in heavy traffic.
■Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when the
vehicle is not in use, due to natural discharge and the draining effects of certain elec-
trical appliances. If the vehicle is left for a long time, the 12-volt battery may dis-
charge, and the hybrid system may be unable to start. (The 12-volt battery recharges
automatically while the hybrid system is operating.)
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4
5
6
7

GS450h_U (OM30D01U)
7918-1. Specifications
8
Vehicle specifications
Light bulbs
Light BulbsBulb No.WTy p e
Exterior
Discharge headlights*35A
Fog lights*55B
Front turn signal lights7444NA28 /8C
Rear turn signal lightsW21W21D
Back-up lightsW16W16D
Outer foot lightsW5W5D
Interior
Door courtesy lights5D
Vanity lights8D
Tr u n k l i g h t3.8C
A: D4S discharge bulbsB: H11 halogen bulbs
C: Wedge base bulbs (amber) D: Wedge base bulbs (clear)
*: If equipped

814
GS450h_U (OM30D01U)
8-2. Customization
Automatic
light control
system
( P. 2 1 3 )
“Headlamps-On Sensitiv-
ity”
(Adjust the sensitivity of the
ambient light sensor)
Standard-2 to 2O—O
“Headlamps Auto-Off
Ti m e r ”
(Adjust the time elapsed
before the headlights auto-
matically turn off)
30
seconds
Off
O—O
60
seconds
90
seconds
Welcome light illumination
controlOnOff——O
Lights
(  P. 2 1 3 )“Daytime Running Lights”
(Daytime running lights
can be disabled)
*3OnOffO—O
Intuitive
parking
assist
*2
( P. 2 6 1 )
“Detection (Front)”
(Detection distance of the
front center sensor)
FarNearO—O
“Detection (Rear)”
(Detection distance of the
rear center sensor)
FarNearO—O
“Alert Volume”
(Alert volume can be
adjusted)
31 to 5O—O
“Display”
(when intuitive parking
assist is operating)All sensors
displayedDisplay offO—O
Automatic
air condition-
ing system
(  P. 3 6 4 )
“A u t o A / C M o d e ”
(A/C Auto switch opera-
tion)
OnOffO—O
“Smog Sensor Sensitivity”
(Exhaust gas sensor sensi-
tivity)
Standard-3 to 3O—O
ItemFunctionDefault
settingCustom-
ized setting123