2018 Lexus ES350 overheating

ES350_OM_OM06134U_(U)
792. Instrument cluster
2
Instrument cluster
NOTICE
■To prevent damage to the engine and its components
●Do not let the indicator needle of the tachometer enter the red zone, which indicates
the maximum engine speed.
●The engine may be overheating if the engine coolant temperature gauge is in the red
zone (H); or “Engine Coolant Temp High” is shown on the multi-information display.
In this case, immediately stop the vehicle in a safe place, and check the engine after it
has cooled completely. ( →P. 510)

ES350_OM_OM06134U_(U)
1574-2. Driving procedures
4
Driving
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be suspended if the
engine is turned on and off re peatedly in a short period of time. In this case, refrain from
operating the engine. After about 10 seconds, the steering lock motor will resume func-
tioning.
■When “Check Access System with Elec. Key” is displayed on the multi-information dis-
play
The system may be malfunctio ning. Have the vehicle inspected by your Lexus dealer
immediately.
■If the electronic key battery is depleted
→ P. 457
■Operation of the engine switch
●If the switch is not pressed shortly and firmly, the engine switch mode may not change
or the engine may not start.
●If attempting to restart the engine immediately after turning the engine switch off, the
engine may not start in some cases. After turning the engine switch off, please wait a
few seconds before restarting the engine.
■If the smart access system with push-button start has been deactivated in a customized
setting
→ P. 504
■Odometer and trip meter display
When the engine switch is turned off, the odometer or trip meter display will extinguish
after approximately 30 seconds. “Steering Lock active” will be displayed on the
multi-information display.
Check that the shift lever is set in P. Press the
engine switch while turn ing the steering wheel
left and right.

260
ES350_OM_OM06134U_(U)4-5. Using the driving support systems
■Operating conditions of
hill-start assist control
When the following four conditions are met, the hill-start assist control will operate:
●The shift lever is in a position other than P or N (when starting off forward/backward on
an upward incline).
●The vehicle is stopped.
●The accelerator pedal is not depressed.
●The parking brake is not engaged.
■Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in any of the following situations:
●The shift lever is moved to P or N.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●Approximately 2 seconds elapse af ter the brake pedal is released.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from overheating
when there is frequent steering input over an extended period of time. The steering
wheel may feel heavy as a result. Should this occur, refrain from excessive steering input
or stop the vehicle and turn the engine off. The EPS system should return to normal
within 10 minutes.

375
ES350_OM_OM06134U_(U)6-1. Using the air conditio
ning system and defogger
6
Interior features
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 battery discharge, do not use th e functions when the engine is not running.

510
ES350_OM_OM06134U_(U)8-2. Steps to take in an emergency
If your vehicle overheats
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.
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. 76) enters the
red zone or a loss of engine power is experienced. (For example, the vehicle
speed does not increase.)
●Steam comes out from under the hood.
Correction procedures
1
2
3
1
2
4
1
2
3
4

566Alphabetical index
ES350_OM_OM06134U_(U)
Child restraint systemBooster seats, definition ......................51
Booster seats, installation..................60
Convertible seats, definition ..............51
Convertible seats, installation ........ 58
Front passenger occupant classification system ......................... 44
Infant seats, definition ............................51
Infant seats, installation ...................... 58
Installing CRS with LATCH anchors .....................56
Installing CRS with seat belts ......... 58
Installing CRS with top tether strap ...........................61
Child safety ................................................ 50 Airbag precautions .............................. 37
Battery precautions ...........................438, 509
Child restraint system ...........................51
How your child should wear the seat belt ............................................31
Installing child restraints.....................55
Moon roof precautions.....................137
Power window lock switch .............. 131
Power window precautions .......... 133
Rear door child-protectors .............98
Removed electronic key battery precautions.............. 458
Seat belt extender precautions ........................................... 33
Seat belt precautions .......................... 33
Seat heater precautions..................375
Trunk precautions............................... 104 Child-protectors ..................................... 98
Cleaning
Aluminum wheels ................................ 413
Exterior ..................................................... 412
Interior .......................................................415
Seat belts..................................................416
Clock......................................................... 387
Coat hooks ............................................. 392
Condenser.............................................. 435
Console box .............................................381
Console box light ...................................381
Consumption screen ............................. 86
Cooling system Engine overheating ........................... 510
Cruise control Cruise control ....................................... 219
Dynamic radar cruise control ..... 207
Cup holders............................................ 382
Curtain shield airbags ........................... 35
Customizable features ...................... 538
Daytime running light system............ 166
Defogger Front windshield................................. 370
Outside rear view mirrors ............ 370
Rear window........................................ 370
Dimension ................................................. 516
Dinghy towing ......................................... 153
Display Dynamic radar cruise control ..... 207
LDA (Lane Departure Alert with steering control) .................... 198
Multi-information display..................80
Trip information ..................................... 87
Warning message............................ 488
D

568Alphabetical index
ES350_OM_OM06134U_(U)
EngineAccessory mode................................. 155
Compartment......................................429
Engine switch ........................................ 154
Hood ........................................................ 427
How to start the engine ................... 154
Identification number ........................ 517
If the engine will not start............... 502
Ignition switch (engine switch)..... 154
Overheating .......................................... 510
Engine compartment cover ............. 430
Engine coolant Capacity ................................................ 520
Checking................................................434
Preparing and checking before winter .................................... 262
Engine coolant temperature gauge .........................................................76
Engine immobilizer system ................. 65
Engine oil Capacity .................................................. 518
Checking................................................. 431
Preparing and checking before winter .................................... 262
Enhanced VSC ..................................... 257
EPS (Electronic Po wer Steering)
Function ................................................. 258
Warning light ...................................... 483
Event data recorder (EDR) ...................10 Flat tire ........................................................ 491
Floor mats....................................................26
Fluid
Automatic transmission .................... 521
Brake.......................................................... 521
Washer ................................................... 439
Fog lights Switch ........................................................ 172
Footwell light ........................................... 377
Front passenger occupant classification system ............................44
Front personal lights ........................... 378
Front seats Adjustment............................................... 116
Cleaning...................................................415
Correct driving posture .................... 28
Driving position memory................... 117
Head restraints .......................................121
Power easy access system ...............117
Seat heaters .......................................... 376
Seat position memory ......................... 117
Seat ventilators.................................... 376
Front side marker lights Light switch.............................................165
Replacing light bulbs ....................... 467
Wattage ................................................. 524
Front turn signal lights Replacing light bulbs ....................... 465
Turn signal lever ...................................163
Wattage ................................................. 524F

572Alphabetical index
ES350_OM_OM06134U_(U)
Ornament lights .....................................377
Outer foot lightsOuter foot lights ................................. 377
Replacing light bulbs ........................470
Wattage ..................................................524
Outside rear view mirrors Adjusting and folding........................ 128
Blind spot monitor.............................249
Linked mirror function when reversing ................................. 129
Mirror position memory .................... 117
Outside rear view mirror defoggers ............................370
Outside temperature display ..............76
Overheating ............................................ 510
Parking assist sensors (intuitive parking assist) .................. 222
Parking brake Operation ............................................... 164
Parking brake engaged warning buzzer ................................ 164
Parking lights Light switch ............................................ 165
Replacing light bulbs ........................470
PCS (Pre-Collision System) Function ................................................... 187
Warning light ...................................... 483
Personal lights........................................ 378 Power easy access system ...................117
Power outlets ......................................... 387
Power steering (Electric Power
Steering system)................................ 258 Warning light .......................................483
Power trunk opener and closer ........ 101
Power windows Door lock linked window operation ........................... 132
Jam protection function......................131
Operation..................................................131
Window lock switch ............................131
Pre-Collision System (PCS) Function ....................................................187
Warning light .......................................483
Radar cruise control (dynamic radar cruise control).........................207
Radiator.................................................... 435
Radio
*.......................................................294
RCTA (Rear Cross Traffic Alert).........................................249
Rear personal lights ............................ 378
Rear side marker lights Light switch.............................................165
Replacing light bulbs ....................... 470
PR