2020 Lexus IS300 heating

4266-2. Using the air conditioning system
IS350 AWD/IS350/IS300 AWD/IS300_U
Turn the heated steering wheel on/off
The indicator light comes on when the
heated steering wheel is operating.
●The heated steering wheel can be used when the engine switch is in IGNITION ON
mode.
●The heated steering wheel will automatically turn off after about 30 minutes.
Heated steering wheel/seat heaters/seat ventilators
: 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 prevent 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
●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 battery discharge, do not use the functions when the engine is off.
Heated steering wheel

4276-2. Using the air conditioning system
6
Interior features
IS350 AWD/IS350/IS300 AWD/IS300_U
Each time the switch is pressed, the
intensity of the seat heater changes and
the level indicator lights (amber) light
as follows:
Hi (3 segments lit)  Mid (2 segments
lit)  Lo (1 segment lit)  Off
■The seat heaters can be used when
The engine switch is in IGNITION ON mode.
■Seat heater timer control
To enable seat heater timer control, press and hold the driver and front passenger seat
heater switches at the same time until a buzzer sounds once. If a seat heater is turned on
while seat heater timer control is enabled, the intensity of the seat heater will automati-
cally change from Hi Mid Lo.
The timing of the change in seat heater in tensity differs depending on the temperature
inside the cabin, etc. when the seat heater is operating.
To disable seat heater timer control, press and hold the driver and front passenger seat
heater switches at the same time until a buzzer sounds twice.
Each time the switch is pressed, the
intensity of the seat ventilator changes
and the level indicator lights (green)
light as follows:
Hi (3 segments lit)  Mid (2 segments
lit)  Lo (1 segment lit)  Off
■The seat ventilators can be used when
The engine switch is in IGNITION ON mode.
■Seat ventilator
The seat ventilators provide ventilation only, and do not have a heating/cooling function.
Seat heaters
Type A Type B
Seat ventilators

5798-2. Steps to take in an emergency
8
When trouble arises
IS350 AWD/IS350/IS300 AWD/IS300_U
●The needle of the engine coolant temperature gauge (P. 89) 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 comes out 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, insp ect the hoses and
radiator core (radiator) for any
leaks.
Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
If your vehicle overheats
The following may indicate that your vehicle is overheating.
Correction procedures
1
2
3
1
2

643Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U
Child safety ................................................ 52Airbag precautions ..............................38
Battery precautions ............. 483, 578
Child restraint system ......................... 53
How your child should wear the seat belt .......................................... 32
Installing child restraints..................... 57
Moon roof precautions.................... 169
Power window lock switch ............ 162
Power window precautions .......... 165
Rear door child-p rotectors ............ 127
Removed electronic key battery precautions.............. 503
Seat belt extender precautions ........................................... 35
Seat belt precautions ..........................56
Seat heater precautions..................426
Trunk precautions............................... 133
Child-protectors..................................... 127 Cleaning .......................................454, 458
Aluminum wheels ..............................455
Exterior ................................................... 454
Interior .....................................................458
Seat belts................................................ 459
Clock..........................................................437
Coat hooks ............................................... 441
Compass ..................................................449
Condenser.............................................. 480
Console box ............................................432
Cooling system ......................................478 Engine overheating .......................... 579
Cruise control Dynamic radar cruise control ..... 248
Cup holders............................................ 433
Current fuel consumption .................................. 112, 113
Curtain shield airbags ............................36
Customizable features ........................ 613

645Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U
E-mail.........................................................380
Eco drive mode ..................................... 297
Eco Driving Indicator........................... 109
EDR (Event data recorder) ...................10
Elapsed time .............................................. 112
Electric Power Steering (EPS) ....... 302Warning light .......................................526
Electronic key ........................................... 118 Battery-saving function .....................137
If the electronic key does not operate properly............................. 572
Replacing the battery ...................... 502
Emergency, in case of If a warning message is displayed ........................................532
If the electronic key does not operate properly ........ 572
If the engine will not start............... 570
If the vehicle battery is discharged .........................................575
If the vehicle is trapped in rising water ......................................... 516
If the warning buzzer sounds................................................. 525
If the warning light turns on.......... 525
If you have a flat tire ......................... 559
If you think something is wrong...............................................523
If your vehicle becomes stuck ..................................................... 583
If your vehicle has to be stopped in an emergency ........... 515
If your vehicle needs to be towed ........................................ 517
If your vehicle overheats ................579 Emergency flashers .............................. 514
Engine ....................................................... 589
ACCESSORY mode .......................187
Compartment ..................................... 473
Engine switch ....................................... 186
Hood........................................................ 470
How to start the engine................... 186
Identification number...................... 588
If the engine will not start ............... 570
Ignition switch (engine switch) .... 186
Overheating......................................... 579
Engine coolant .......................................478 Capacity................................................. 592
Checking ............................................... 478
Preparing and checking before winter ....................................306
Engine coolant temperature gauge ........................................................ 89
Engine immobilizer system .................. 76
Engine oil ..................................................475 Capacity................................................ 590
Checking ............................................... 475
Preparing and checking before winter ....................................306
Engine oil maintenance data ............ 477
Engine switch ...........................................186
Enhanced VSC .......................................301
EPS (Electronic Power Steering) ........ 302 Warning light ....................................... 526
Event data recorder (EDR)................... 10
E

650Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U
Moon roof..................................................166Door lock linked moon roof operation ......................167
Jam protection function ....................167
Operation ............................................... 166
MP3 disc.................................................. 344
Multi-information display ..................... 94 Audio system-linked ........................... 94
Drive information ................................100
Dynamic radar cruise control......248
LDA (Lane Departure Alert with steering control) ................... 244
Navigation system-linked ................. 94
Settings ..................................................... 103
Warning message .............................532
Navigation system
*
Needle ....................................................... 103
Noise from under vehicle ....................... 8 Odometer .................................................. 89
Oil
Engine oil .............................................. 590
Front differential oil ...........................593
Rear differential oil ............................594
Opener Hood........................................................ 470
Trunk ......................................................... 130
Outer foot lights Location ................................................. 428
Replacing light bulbs .......................... 511
Wattage ................................................. 597
Outside rear view mirrors .................. 159 Adjusting and folding ........................159
Blind spot monitor ............................285
Linked mirror function when reversing................................. 160
Mirror position memory .................. 147
Outside rear view mirror defoggers............................ 422
Outside temperature ............................ 89
Overheating, Engine ...........................579
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