2015 Lexus GS450h headlights

GS450h_OM_OM30F70U_(U)
4916-3. 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.

554
GS450h_OM_OM30F70U_(U)
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. 560)
●There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
●There may be a malfunction in the immobilizer system. ( P. 8 1 )
●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. 555)
One of the following may be the cause of the problem:
●The 12-volt battery may be discharged. ( P. 562)
●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 9 3 )
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

5557-2. Steps to take in an emergency
GS450h_OM_OM30F70U_(U)
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. 562)
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

5637-2. Steps to take in an emergency
GS450h_OM_OM30F70U_(U)
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_OM_OM30F70U_(U)
5838-1. Specifications
8
Vehicle specifications
Compact spare tire
Ti r e s i z eT155/70D17 110M, T145/70D18 107M
Tire inflation pressure
(Recommended cold tire
inflation pressure)
60 psi (420 kPa, 4.2 kgf/cm2 or bar)
Wheel size17  4T (T155/70D17), 18  4T (T145/70D18)
Wheel nut torque76 f t•lbf (103 N•m, 10.5 kgf•m)
Light bulbs
Light bulbsBulb No.WTy p e
Exterior
Discharge headlights*35A
Fog lights*19B
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3.8D
A: D4S discharge bulbs
B: H16 halogen bulbs
C: Wedge base bulbs (amber) D: Wedge base bulbs (clear)
*: If equipped

604
GS450h_OM_OM30F70U_(U)
8-2. Customization
Tu r n s i g n a l
lever
( P. 2 0 9 )
The number of times
the turn signal lights
flash automatically
when the turn signal
lever is moved to the
first position during a
lane change
(After flashing the turn
signal lights when turn-
ing left or right while
this function is off and
the turn signal lever is
moved to the first posi-
tion in direction of the
flashing light, the turn
signal lights can be
selected to be flashing
or off.)
3
5
——O
7
Off
(the turn signal lights keep
flashing if the turn signal
lever is moved
to the first posi- tion in direc-
tion of flashing light)
Off
(the turn signal
lights will be off if the turn sig- nal lever is
moved to the
first position in direction of
flashing light)
Automatic
light control
system
(  P. 2 1 7 )
Light sensor sensitivityStandard-2 to 2O—O
Ti m e e l a p s e d b e f o r e
the headlights auto-
matically turn off30
seconds
Off
O—O
60
seconds
90
seconds
Welcome light illumi-
nation controlOnOff——O
Lights
(  P. 2 1 7 )Daytime running
lights
*2OnOffO—O
ItemFunctionDefault
settingCustomized setting123

640Alphabetical index
GS450h_OM_OM30F70U_(U)
Hands-free system (for cellular phone)
*
HD Radio® system*
Head restraints ....................................... 158
Headlights ................................................. 217 Adaptive Front-lighting System (AFS) .................................... 219
Discharge headlights precautions ......................................... 491
Headlight leveling warning message ............................ 516
Light switch ............................................. 217
Replacing light bulbs ....................... 489
Wattage ................................................. 583
Headlights aim ............................ 477, 624
Head-up display..................................... 104
Heaters Air conditioning system ................. 335
Heated steering wheel ................... 380
Seat heaters ......................................... 382
Outside rear view mirrors ............ 360
High-voltage components ...................76
Hood .......................................................... 426 Open ........................................................426
Warning message ............................ 520
Hooks Cargo hooks ........................................ 373
Coat hooks .......................................... 390
Luggage hook ..................................... 373
Retaining hooks (floor mat) ............. 28
Utility hook ............................................392 Horn............................................................. 216
Hybrid battery (traction battery) ....... 76
Hybrid battery (traction battery)
air vents ..................................................... 77
Hybrid system............................................ 72 Emergency shut off system .............. 77
Energy monitor/consumption screen.......................... 111
EV drive mode ...................................200
High voltage components ................76
Hybrid System Indicator ................... 94
Hybrid system precautions ..............76
Hybrid vehicle driving tips ..............316
If the hybrid system will not start .......................................554
Overheating.........................................566
Power (ignition) switch.....................193
Starting the hybrid system...............193
Vehicle proximity notification system ......................................................73
Hybrid System Indicator .......................94
Hybrid transmission ............................ 203 If the shift lever cannot be shifted from P ............556
Paddle shift switches........................205
S mode.................................................... 206
H