2013 Lexus GS450h heating

GS450h_U (OM30D01U)
5915-7. Other interior features
5
Interior features
Blows air from the seatHi
Mid
Lo
Off
The indicator light (green) on the
switch and the level indicator lights
(green) come on.
■The seat heaters/seat ventilators can be used when
The power switch is in ON mode.
■The seat heater timer control
The seat heater automatically switches from Hi  Mid  Lo  Off. The switching
timing differs depending on the temperature inside the cabin etc. when the seat
heater was operated.
■Automatic operation of the seat heater during Eco drive mode
Eco drive mode controls the heating operat ions and fan speed of the air conditioning
system to enhance fuel efficiency. If the driving mode select switch is switched to Eco
drive mode in cold temperatures, the seat heater may be automatically operated to
assist heating performance.
■Button lock function (vehicles with rear control panel)
To prevent inadvertent operation, some buttons on the rear armrest can be locked.
(  P. 383)
■Rear control panel illumination off function (vehicles with rear control panel)
Control panel illumination on the rear armrest can be turned off. ( P. 3 8 3 )
Seat ventilators (front seats only)
1
2
13
4

592
GS450h_U (OM30D01U)
5-7. Other interior features
CAUTION
■Burns
●Use caution when seating the following persons in a seat with the seat heater on
to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the physically challenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs, cold remedies, etc.)
●Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the temperature of the
seat and may lead to overheating.
●Do not use seat heater more than necessary. Doing so may cause minor burns or
overheating.
NOTICE
■To prevent damage to the seat heaters/seat ventilators
Do not put heavy objects that have an unev en surface on the seat and do not stick
sharp objects (needles, nails, etc.) into the seat.
■To prevent 12-volt battery discharge
Turn the seat heaters/seat ventilator s off when the hybrid system is off.

7417-2. Steps to take in an emergency
GS450h_U (OM30D01U)
7
When trouble arises
*: Refer to the separate “Scheduled Maintenance” or “Owner’s Manual Supple-ment” for the maintenance interval applicable to your vehicle.
Wa r n i n g m e s s a g eDetailsCorrection procedure
Indicates that the tire
position information can-
not be recognized
Drive for a short while
and check if the display
updates. If the radio wave condi-
tions improve, the dis-
play may return to
normal. If the tire pres-
sure is still not dis-
played after driving for
several minutes, stop
the vehicle in a safe
place, turn the power
switch off then on
again, and start driving.
If the tire pressure is still
not displayed even
after repeating this sev-
eral times, have the
vehicle inspected at
your Lexus dealer.
Indicates that the pre-col-
lision system is not cur-
rently functional because
the grille cover or the
sensor is dirtyThis message also
appears when the pre-
collision system is not
functional due to over-
heating.
Check the grille cover
and the sensor and clean
them if they are dirty. In case of overheating,
the system will become
functional once the sys-
tem cools down.
(If equipped)
(Flashes)
(If equipped)

774
GS450h_U (OM30D01U)
7-2. Steps to take in an emergency
If your vehicle overheats
●The needle of the engine coolant temperature gauge enters the red
zone:
The engine may be overheating.
●“Hybrid System Overheat” is shown on the multi-information display:
The power control unit may be overheating.
■If the needle of the engine coolant temperature gauge enters the red
zone
Stop the vehicle in a safe place an d turn off the air conditioning sys-
tem.
Check to see if steam is coming out from the engine area.
If you see steam:
Stop the hybrid system. Carefull y lift the hood after the steam sub-
sides and then restart the hybrid system.
If you do not see steam:
Leave the hybrid system operating and carefully lift the hood.
Check to see if the cooling fans are operating.
If the fans are operating:
Wait until the engine coolant temperature ga uge begins to fall and
then stop the hybrid system.
If the fans are not operating:
Stop the hybrid system immediately and call your Lexus dealer.
The following may indicate that your vehicle is overheating:
Correction procedures
1
2
3

7767-2. Steps to take in an emergency
GS450h_U (OM30D01U)After the hybrid system has
cooled down, check the power
control unit coolant level and
inspect the cooling system for
leaks.
If the engine compartment cover
needs to be removed:
P. 6 3 8
Add power control unit cool-
ant if necessary.
Water can be used in an emer-
gency if power control unit coolant
is unavailable. ( P. 7 8 7 )
Have the vehicle inspected at the nearest Lexus dealer as soon as pos-
sible.
■Overheating
If you observe the following, your vehicle may be overheating:
●The engine coolant temperature gauge enters the red zone or a loss of power is
experienced.
●“Hybrid System Overheat” is shown on the multi-information display.
●Steam comes out from under the hood.
4
5

843Alphabetical index
GS450h_U (OM30D01U)
Console box ............................................577
Console box light ..................................577
Consumption screen ............................. 113
Coolant..................................................... 642Capacity ................................................. 787
Checking................................................642
Preparing and checking before winter ..................................................... 319
Cooling system ..................................... 642 Engine overheating........................... 774
Hybrid system overheating .......... 774
Cruise control Cruise control...................................... 232
Dynamic radar cruise control......236
Cup holders ............................................ 578
Curtain shield airbags ........................... 39
Customizable features ....................... 807
Daytime running light system ............216
Defogger Front windshield ...................................371
Outside rear view mirrors ............ 384
Rear window ....................................... 384
Differential ............................................... 789
Dimensions ............................................. 782
Dinghy towing......................................... 188 Display
Dynamic radar cruise control ..... 236
LKA (Lane-Keeping Assist)......... 255
Multi-information display.................. 94
Remote Touch screen ....................330
Trip information ..................................... 95
Warning message............................... 721
Do-it-yourself maintenance............... 631
Door courtesy lights Location ................................................... 571
Wattage ................................................... 791
Door lock Doors......................................................... 137
Smart access system with push-button start ................................121
Wireless remote control.................. 134
Doors .......................................................... 137 Automatic door locking and unlocking system ....................139
Door glasses ..........................................164
Door lock................................................. 137
Open door warning buzzer .......... 125
Open door warning light ................ 714
Outside rear view mirrors ............... 161
Rear door child-protector ............. 138
D

845Alphabetical index
GS450h_U (OM30D01U)
Energy monitor ........................................ 110
EngineAccessory mode................................. 190
Compartment ......................................637
Engine switch ........................................ 189
Hood ........................................................634
How to start the hy brid system .... 189
Identification number .......................783
Ignition switch (power switch).................................. 189
Overheating ......................................... 774
Power switch......................................... 189
Engine compartment cover ............. 638
Engine coolant....................................... 642 Capacity ................................................. 787
Checking................................................642
Preparing and checking before winter ..................................... 319
Engine coolant temperature gauge ........................................................ 89
Engine oil ................................................. 639 Capacity ................................................ 785
Checking............................................... 639
Oil level warning message ........... 733
Oil pressure warning message ........................... 722
Preparing and checking before winter ..................................... 319 Engine oil maintenance data ............624
Engine switch ...........................................189
EPS
(Electronic Power Steering) ........ 289Function .................................................. 289
Warning light ......................................... 712
Warning message............................. 726
EV drive mode ........................................ 196
Event data recorder (EDR).....................11
First-aid kit storage net ........................581
Flat tire ....................................................... 749
Floor mats................................................... 28
Fluid Brake........................................................ 789
Hybrid transmission .........................788
Washer ................................................... 646
Fog lights.................................................... 218 Replacing light bulbs ...................... 689
Switch ........................................................218
Wattage ................................................... 791
Footwell light ............................................ 571
Front passenger occupant classification system ............................49
Front personal lights ............................572
F

847Alphabetical index
GS450h_U (OM30D01U)
HeatersAir conditioning system ..................364
Heated steering wheel ...................588
Seat heaters ......................................... 590
Outside rear view mirrors ............ 384
High-voltage components ...................74
Hood .......................................................... 634 Open ........................................................634
Warning message .............................728
Hooks Cargo hooks ......................................... 581
Coat hooks ...........................................597
Luggage hook ...................................... 581
Retaining hooks (floor mat) ............. 28
Utility hook ........................................... 599
Horn ............................................................. 212
Hybrid battery (traction battery) .......74
Hybrid battery (traction battery) air vents .................................................... 75
Hybrid system ........................................... 70 Emergency shut off system.............. 75
Energy monitor/consumption screen ...................... 109
EV drive mode..................................... 196
High voltage components ............... 74
Hybrid System Indicator ................... 92
Hybrid system precautions.............. 74
Hybrid vehicle driving tips...............317
If the hybrid system will not start........................................ 762
Overheating ......................................... 774
Power (ignition) switch .................... 189
Starting the hybrid system .............. 189
Vehicle proximity notification system ....................................................... 71 Hybrid System Indicator .......................92
Hybrid transmission .............................. 199
If the shift lever cannot be shifted from P ............ 764
Paddle shift switches..........................201
S mode.................................................... 202
I/M test ..................................................... 630
Identification Engine ..................................................... 783
Vehicle .................................................... 783
Ignition switch (power switch) ..........189
Illuminated entry system ....................573
Immobilizer system ................................. 79
Indicators .....................................................87
Initialization Maintenance ........................................ 624
Moon roof ...............................................169
Power windows....................................165
Tire pressure warning system ...............................653
Initiators (tire pressure warning system) ................................ 659
Inside door handle lights ..................... 571
Inside rear view mirror......................... 159
Instrument panel light control .............. 91
Interior lights ............................................ 571
Intuitive parking assist .......................... 261 Function .................................................... 261
Warning message..................723, 734
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