2019 Lexus GS300 heating

330
GS350_300_OM_OM30G96U_(U)5-2. Using the air conditio
ning system and defogger
Heated steering wheel/seat heaters/seat ventilators
Turns the heated steering wheel on/off
The indicator light comes on when the
heater is operating.
●The heated steering wheel can be used when the engine switch is in IGNITION ON
mode.
●The heated steering wheel will automati cally turn off after about 30 minutes.
: If equipped
Heated steering wheel and seat heaters heat the side grips of the steering
wheel and seats, respectively. Seat ventilators maintain good airflow by blow-
ing air from the seats.
WARNING
●Care should be taken to prevent injury if anyone in the following categories comes in
contact with the steering wheel or seats when the heater is on:
• 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.)
●Observe the following precautions to pr event the minor burns or overheating:
• Do not cover the seat with a blanket or cushion when using the seat heater.
• Do not use seat heater more than necessary.
NOTICE
●To prevent damage to the seat heaters/seat ventilators, do not put heavy objects that
have an uneven surface on the seat and do not stick sharp objects (needles, nails, etc.)
into the seat.
●To prevent battery discharge, do not us e the functions when the engine is off.
Heated steering wheel (If equipped)

334
GS350_300_OM_OM30G96U_(U)5-2. Using the air conditio
ning system and defogger
■Automatic operation of the seat heater during Eco drive mode
If the driving mode select swit ch is switched to Eco drive mo de in cold temperatures, the
seat heater may be automatically oper ated to assist heating performance.
■Automatic operation during S-FLOW mode
The front seat heater and ventilator or the re ar seat heater may automatically turn off
when S-FLOW mode is turned on during automatic mode. (P. 317)
■Button lock function (vehicle s with rear control panel)
To prevent inadvertent operation, some bu ttons on the rear armrest can be locked.
(  P. 329)
■When the switch is disabled (v ehicles with rear control panel)
When the rear control panel switch cannot be operated even though the button lock
function is released, check whether the switch is disabled due to selecting on
Remote Touch screen. ( P. 323)
■Rear control panel illumination off function (vehicles with rear control panel)
Control panel illumination on the re ar armrest can be turned off. (P. 329)
■Customization
The automatic mode settings for the front seat heaters and ventilators or the rear seat
heaters can be changed. (Customizable features:  P. 549)

4507-2. Steps to take in an emergency
GS350_300_OM_OM30G96U_(U)
(If equipped)
Indicates that the LKA (Lane-Keeping Assist) system has
determined that the driver does not have their hands on
the steering wheel while the steering control function is
on If the driver operates the steering wheel only a small
amount, the system may be unable to detect the steer-
ing wheel operations and this warning may be dis-
played.
A buzzer also sounds.
 Firmly hold the steering wheel.
(If equipped)
Indicates that steering control function is temporarily
canceled due to the LKA (Lane-Keeping Assist) system
determining that the driver does not have their hands on
the steering wheel while the steering control function is
on
If the driver operates the steering wheel only a small
amount, the system may be unable to detect the steer-
ing wheel operations and this warning may be dis-
played.
 Firmly hold the steering wheel.
Indicates that the parking brake system is overheating
A buzzer also sounds.
 Do not use the parking brake until the message dis-
appears.
Indicates an engine malfunction
A buzzer also sounds.
 Have the vehicle inspected by your Lexus dealer.
Warning messageDetails/Actions
(U.S.A.) (Canada)
(U.S.A.) (Canada)

512
GS350_300_OM_OM30G96U_(U)7-2. Steps to take in an emergency
If your vehicle overheats
●The needle of the engine coolant temperature gauge (
P. 92, 98) enters the
red zone or a loss of engine power is experienced. (For example, the vehicle
speed does not increase.)
●“Engine Coolant Temp High Stop in a Safe Place See Owner’s Manual” is
shown on the multi-information display.
●Steam is coming from under the hood.
Stop the vehicle in a safe place and tu rn off the air conditioning system, and
then stop the engine.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the engine has cooled down sufficiently, inspect the hoses and cooling
core (radiator) for any leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2

586Alphabetical index
GS350_300_OM_OM30G96U_(U)
Child restraint system............................ 59Booster seats, definition ....................59
Booster seats, installation.................. 67
Convertible seats, definition ............59
Convertible seats, installation .........65
Front passenger occupant classification system ......................... 52
Infant seats, definition ..........................59
Infant seats, installation .......................65
Installing CRS with LATCH anchors ..................... 64
Installing CRS with seat belts ..........65
Installing CRS with top tether strap .........................68
Child safety ................................................ 58 Airbag precautions .............................. 44
Battery precautions .................393, 511
Child restraint system .........................59
How your child should wear the seat belt ................................. 37, 38
Installing child restraints..................... 63
Moon roof precautions.................... 186
Power window lock switch .............. 181
Power window precautions .......... 183
Rear door child-protectors ........... 146
Removed electronic key battery precautions................ 413
Seat belt comfort guide ..................... 37
Seat belt extender precautions ......40
Seat belt precautions .......................... 62
Seat heater precautions................. 330
Trunk precautions............................... 152 Child-protectors .................................... 146
Cleaning .......................................360, 364
Aluminum wheels ................................361
Exterior ...................................................360
Interior ..................................................... 364
Seat belts................................................365
Clock................................................. 93, 345
Coat hooks ............................................. 350
Condenser.............................................. 390
Console box ........................................... 339
Console box light ................................. 339
Consumption screen ............................ 134
Cooling system ..................................... 388 Engine overheating ............................ 512
Consumption screen ............................ 133
Cruise control Cruise control ..................................... 278
Dynamic radar cruise control with full-speed range ................... 266
Cup holders............................................ 340
Curtain shield airbags ............................ 42
Customizable features ...................... 549
Daytime running light system...........223
Defogger Front windshield................................. 322
Outside rear view mirrors ............ 322
Rear window........................................ 322
Differential Front differential .................................530
Rear differential.....................................531
D

588Alphabetical index
GS350_300_OM_OM30G96U_(U)
Eco drive mode ...................................... 281
Eco Driving Indicator...............................91
Eco driving meter .................................... 98
EDR (Event data recorder) ...................10
Electric Power Steering (EPS) ....... 297Function .................................................. 297
Warning light ...................................... 438
Warning message ............................. 444
Electronic key ......................................... 138 Battery-saving function .................... 158
If the electronic key does not operate properly............................ 504
Replacing the battery .........................412
Emergency, in case of If a warning buzzer sounds........... 437
If a warning light turns on............... 437
If a warning message is displayed ........................................ 444
If the electronic key does not operate properly ....... 504
If the engine will not start............... 500
If the vehicle is trapped in rising water ........................................428
If the parking brake cannot be released ....................... 502
If the vehicle battery is discharged ........................................ 507
If you have a flat tire ............. 475, 486
If you think something is wrong...............................................435
If your vehicle becomes stuck ...... 518
If your vehicle has to be stopped in an emergency ............................. 427
If your vehicle needs to be towed .......................................429
If your vehicle overheats ................. 512 Emergency flashers .............................426
Emergency tire puncture repair
kit ............................................................. 486
Engine Accessory mode ............................... 204
Compartment ..................................... 378
Engine switch ...................................... 203
Hood........................................................ 375
How to start the engine.................. 203
Identification number....................... 524
Ignition switch (engine switch.................................. 203
Overheating........................................... 512
Engine compartment cover...............381
Engine coolant ...................................... 388 Capacity................................................. 529
Checking .............................................. 388
Preparing and checking before winter ....................................304
Engine coolant temperature gauge .............................................. 92, 100
Engine immobilizer system .................. 77
Engine oil ................................................. 383 Capacity................................................. 526
Checking ...............................................383
Oil level warning message ........... 444
Oil pressure warning message........................... 444
Preparing and checking before winter ....................................304
E

594Alphabetical index
GS350_300_OM_OM30G96U_(U)
Outer foot lightsOuter foot lights ................................ 335
Replacing light bulbs ........................ 422
Wattage ................................................. 535
Outside rear view mirrors .................. 177 Adjusting and folding......................... 177
Blind Spot Monitor........................... 286
Linked mirror function when reversing ..................................179
Mirror position memory .................. 166
Outside rear view mirror defoggers ............................ 322
Outside temperature display ...93, 100
Overheating, Engine ............................512
Paddle shift switches ............................ 210
Parking assist sensors (intuitive parking assist)
*
Parking brake........................................... 217 If the parking brake cannot be released ....................... 502
Operation ................................................ 217
Parking brake engaged warning buzzer ............................... 444
Parking brake engaged warning message ........................... 444
Parking lights .......................................... 222 Light switch ........................................... 222
Replacing light bulbs ........................ 422
Welcome light illumination control ......................... 144 PCS (Pre-Collision System).............245
Function .................................................. 245
Warning light .......................................438
Warning message............................. 444
Personal lights ....................................... 336
Power easy access system ................. 166
Pop-up display ................................. 111, 123
Power outlets ......................................... 346
Power steering (Electric Power Steering system)................................. 297 Warning light .......................................438
Warning message............................. 444
Power trunk opener and closer ....... 149
Power windows........................................ 181 Door lock linked window operation ...........................182
Jam protection function..................... 181
Operation................................................. 181
Window lock switch ........................... 181
Pre-Collision System (PCS).............245 Function .................................................. 245
Warning light .......................................438
Warning message............................. 444
P