2018 Lexus ES300h heating

394
ES300h_OM_OM33D45U_(U)6-1. Using the air conditioning system and defogger
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 and 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 minor burns or overheating:
• Do not cover the seat with a blanket or cushion when using the seat heater.
• Do not use the 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 12-volt battery discharge, do not use the functions when the hybrid system
is off.

531
ES300h_OM_OM33D45U_(U)8-2. Steps to take in an emergency
8
When trouble arises
If your vehicle overheats
■If the needle of the engine coolant temperature gauge enters the red zone
Stop the vehicle in a safe place and turn off the air conditioning system, and
then stop the hybrid system.
If you see steam:
Carefully lift the hood after the steam subsides.
If you do not see steam:
Carefully lift the hood.
After the hybrid system has
cooled down sufficiently, inspect
the hoses and cooling system for
leaks.Radiator
Cooling fans
If a large amount of coolant leaks,
immediately contact your Lexus
dealer.
The coolant level is satisfactory if
it is between the “FULL” and
“LOW” lines on the reservoir.Reservoir
“FULL”
“LOW”
Radiator cap
The following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge ( →P. 86) enters the
red zone or a loss of hybrid system po wer is experienced. (For example, the
vehicle speed does not increase.)
●“Hybrid System Overheated” is shown on the multi-information display.
●Steam comes out from under the hood.
Correction procedures
1
2
3
1
2
4
1
2
3
4

590Alphabetical index
ES300h_OM_OM33D45U_(U)
CareAluminum wheels ............................... 431
Exterior................................................... 430
Interior .....................................................433
Seat belts ................................................434
Cargo capacity........................................165
Cargo hooks .......................................... 403
CD player
*.............................................. 318
Chains ........................................................ 281
Child restraint system Booster seats, definition ....................53
Booster seats, installation.................. 62
Convertible seats, definition ............ 53
Convertible seats, installation .........60
Front passenger occupant classification system ......................... 46
Infant seats, definition .......................... 53
Infant seats, installation .......................60
Installing CRS with LATCH anchors .................... 58
Installing CRS with seat belts ..........60
Installing CRS with top tether strap ......................... 63
Child safety ................................................ 52 12-volt battery precautions .......... 530
Airbag precautions .............................. 39
Child restraint system ......................... 53
How your child should wear the seat belt .......................................... 33
Installing child restraints..................... 57
Moon roof precautions...................... 151 Power window lock switch.............145
Power window precautions ........... 147
Rear door child-protectors ............... 111
Removed electronic
key battery precautions .............. 479
Seat belt extender precautions .......................................... 35
Seat belt precautions .......................... 56
Seat heater precautions ................. 394
Trunk precautions ................................. 117
Child-protectors ....................................... 111
Cleaning Aluminum wheels ................................ 431
Exterior ...................................................430
Interior ..................................................... 433
Seat belts................................................ 434
Clock......................................................... 406
Coat hooks ............................................... 410
Condenser.............................................. 454
Console box ........................................... 400
Console box light ................................. 400
Consumption screen ..............................99
Cooling system Hybrid system overheating ............531
Cruise control Dynamic radar cruise control ..... 225
Cup holders.............................................. 401
Curtain shield airbags ............................ 37
Customizable features ...................... 560
C

592Alphabetical index
ES300h_OM_OM33D45U_(U)
Emergency, in case ofIf a warning buzzer sounds................................................. 503
If a warning light turns on.............. 503
If a warning message is displayed ....................................... 509
If the 12-volt battery is discharged ......................................... 527
If the electronic key does not operate properly ....... 525
If the hybrid system will not start ................................................523
If you have a flat tire ........................... 513
If you think something is wrong.............................................. 502
If your vehicle becomes stuck ..................................................... 535
If your vehicle has to be stopped in an emergency .......... 497
If your vehicle needs to be towed ...................................... 498
If your vehicle overheats ................. 531
Emergency flashers ............................. 496
Energy monitor .........................................97 Engine
Accessory mode .................................169
Compartment ..................................... 447
Hood........................................................ 445
How to start the hybrid system ................................................... 168
Identification number.......................540
Ignition switch (power switch) ..... 168
Overheating...........................................531
Power switch. ....................................... 168
Engine compartment cover............. 448
Engine coolant Capacity................................................. 543
Checking ............................................... 453
Preparing and checking before winter ....................................280
Engine coolant temperature gauge ........................................................ 86
Engine oil Capacity...................................................541
Checking ............................................... 449
Preparing and checking before winter ....................................280

594Alphabetical index
ES300h_OM_OM33D45U_(U)
Hands-free system (for cellular phone)
*........................ 345
Head restraints ....................................... 135
Headlights Adaptive Front-lighting System (AFS) ..................................................... 183
Light switch ............................................ 182
Replacing light bulbs......................................... 485, 492
Wattage ................................................. 546
Heaters Air conditioning system ................................................. 384
Heated steering wheel ................... 395
Seat heaters ......................................... 395
Outside rear view mirrors ............ 388
High-voltage components .................... 71
Hill-start assist control .........................272
Hood .......................................................... 445
Hooks Cargo hooks ....................................... 403
Coat hooks ............................................ 410
Grocery bag hooks......................... 403
Retaining hooks (floor mat) ............. 28
Horn .............................................................139
Hybrid battery (traction battery) .................................... 71
Hybrid battery (traction battery) air vents .................72 Hybrid system............................................ 67
Emergency shut off system .............. 72
Energy monitor/consumption screen ..................................................... 96
EV drive mode ..................................... 173
High voltage components ................. 71
Hybrid System Indicator ...................88
Hybrid system precautions ............... 71
Hybrid vehicle driving tips ............ 278
If the hybrid system will not start ............................................... 523
Overheating...........................................531
“Power” (ignition) switch ................ 168
Starting the hybrid system.............. 168
Vehicle proximity notification system ..................................................... 68
Hybrid System Indicator ...................... 88
Hybrid transmission .............................. 175 If the shift lever cannot be shifted from P .....................................178
H

597Alphabetical index
ES300h_OM_OM33D45U_(U)
MirrorsInside rear view mirror ..................... 140
Outside rear view mirror defoggers .......................................... 388
Outside rear view mirrors ...............142
Vanity mirrors ..................................... 405
Moon roof Door lock linked moon roof operation ..................... 149
Jam protection function ................... 149
Operation ............................................... 148
MP3 disc
*................................................ 318
Multi-information display .......................91 Drive information .................................. 92
Dynamic radar cruise control...... 225
Energy monitor ...................................... 97
Language ...............................................562
Switching the display........................... 92
Trip information ..................................... 87
Warning message ............................ 509
Navigation system
*
Noise from under vehicle ....................... 8 Odometer .................................................. 86
Oil
Engine oil .................................................541
Opener Hood........................................................ 445
Trunk ............................................................114
Ornament lights ................................... 396
Outer foot lights Outer foot lights ................................. 396
Replacing light bulbs ....................... 492
Wattage ................................................. 546
Outside rear view mirrors Adjusting and folding ........................ 142
Blind spot monitor ............................ 264
Linked mirror function when reversing.................................. 143
Mirror position memory ................. 130
Outside rear view mirror defoggers........................... 388
Outside temperature display ............. 86
Overheating............................................. 531
N
O
*: For vehicles with navigation system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL”.