overheating Lexus IS350 2018 Owner's Manual / LEXUS 2018 IS300,IS350 OWNER'S MANUAL (OM53E34U)

852. Instrument cluster
2
Instrument cluster
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■The meters and display illuminate when
The engine switch is in IGNITION ON mode.
■Instrument panel brightness adjustment
The instrument panel brightness levels when the tail lights are on and off can be adjusted
individually. However, when the surroundings are bright (daytime, etc.), turning on the tail
lights will not change the inst rument panel brightness. At th is time, any adjustments made
to the instrument panel brightness levels will be applied to both settings at once.
■Outside temperature display
●In the following situations, the correct outside temperature may not be displayed, or the
display may take longer than normal to change.
• When stopped, or driving at low speeds (less than 12 mph [20 km/h])
• When the outside temperature has changed suddenly (at the entrance/exit of a garage, tunnel, etc.)
●When “ − −” or “E” is displayed, the sy stem may be malfunctioning.
Take your vehicle to your Lexus dealer.
■Pop-up display
●In some situations, such as when a switch operation is performed, a pop-up display will
be temporarily displayed on the multi-information display or the odometer/trip meter
screen (F SPORT models).
●Some pop-up displays can be set on/off. ( →P. 95)
■Customization
The meter display can be customized on the multi-information display. (→P. 95)
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). In this case, immediately stop the vehicle in a safe place, and check the
engine after it has cooled completely. ( →P. 576)

1804-2. Driving procedures
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes or IGNITION ON
mode (the engine is not running) for more than an hour with the shift lever in P, the engine
switch will automatically turn off. However, this function cannot entirely prevent battery
discharge. Do not leave the vehicle with the engine switch in ACCESSORY or IGNI-
TION ON mode for long periods of ti me when the engine is not running.
■Electronic key battery depletion
→P. 113
■Conditions affe cting operation
→ P. 129
■Notes for the entry function
→P. 130
■If the engine does not start
●Check that the shift lever is se curely set in P. The engine may not start if the shift lever is
displaced out of P.
●The engine immobilizer system ma y not have been deactivated. (→P. 68)
Contact your Lexus dealer.
■Steering lock
After turning the engine switch off and opening and closing the doors, the steering wheel
will be locked due to the steering lock func tion. Operating the engine switch again auto-
matically cancels the steering lock.
■When the steering lock cannot be released
■Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, operation of the motor may be sus-
pended if the engine is turned on and off repeat edly in a short period of time. In this case,
refrain from operating the engine switch. After about 10 seconds, the steering lock
motor will resume functioning. “Steering Wheel Lock Press Engine Switch
while Turning Wheel” w ill be displayed on the
multi-information display.
Check that the shift leve r is in P. Press the
engine switch while turn ing the steering wheel
left and right.

2954-5. Using the driving support systems
4
Driving
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■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 shifted 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
■When the battery is disconnected
The steering wheel may move from its straight forward position, but this will be corrected
automatically when driving.
■Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC and hill-start assist
control systems
●A sound may be heard from the engine compartment when the brake pedal is
depressed repeatedly, when the engine is started or just after the vehicle begins to
move. This sound does not indicate that a malfunction has occurred in any of these sys-
tems.
●Any of the following conditions may occur when the above systems are operating.
None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
• The brake pedal may pulsate slig htly after the ABS is activated.
• The brake pedal may move down s lightly after the ABS is activated.
■EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard.
This does not indicate a malfunction.
■Automatic reactivation of TRAC and VSC systems
After turning the TRAC and VSC systems off, the systems will be automatically re-
enabled in the following situations:
●When the engine swit ch is turned off
●If only the TRAC system is turned off, the TRAC will turn on when vehicle speed
increases
If both the TRAC and VSC systems are turned off, automatic re-enabling will not occur
when vehicle speed increases.
■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.

4166-2. Using the air conditioning system
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
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 automati cally 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 us e the functions when the engine is off.
Heated steering wheel

5768-2. Steps to take in an emergency
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
●The needle of the engine coolant temperature gauge ( →P. 81) 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

641Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Child safety ................................................ 52
Airbag precautions ..............................38
Battery precautions ............... 481, 575
Child restraint system ......................... 53
How your child should wear the seat belt .......................................... 32
Installing child restraints..................... 57
Moon roof precautions...................... 161
Power window lock switch ............ 154
Power window precautions .......... 157
Rear door child-protectors ............. 119
Removed electronic key battery precautions................ 501
Seat belt extender precautions ........................................... 35
Seat belt precautions ..........................56
Seat heater precautions................... 416
Trunk precautions............................... 125
Child-protectors...................................... 119 Cleaning ....................................... 452, 456
Aluminum wheels .............................. 453
Exterior ................................................... 452
Interior ..................................................... 456
Seat belts................................................ 457
Clock.......................................................... 427
Coat hooks ............................................... 431
Compass ................................................. 439
Condenser...............................................478
Console box ............................................422
Cooling system ...................................... 476 Engine overheating .......................... 576
Cruise control Dynamic radar cruise control ..... 239
Cup holders.............................................423
Current fuel consumption .............................. 104, 105
Curtain shield airbags ............................36
Customizable features ......................... 611

643Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
E-mail........................................................... 371
Eco drive mode .....................................288
Eco Driving Indicator............................. 101
EDR (Event data recorder) ...................10
Elapsed time ............................................ 104
Electric Power Steering (EPS) ....... 293
Warning light .......................................523
Electronic key ........................................... 110 Battery-saving function .................... 128
If the electronic key does not operate properly............................ 569
Replacing the battery ...................... 500
Emergency, in case of If a warning message is displayed ........................................529
If the electronic key does not operate properly ....... 569
If the engine will not start................567
If the vehicle battery is discharged ......................................... 572
If the warning buzzer sounds.................................................. 522
If the warning light turns on........... 522
If you have a flat tire ......................... 556
If you think something is wrong.............................................. 520
If your vehicle becomes stuck ..................................................... 580
If your vehicle has to be stopped in an emergency ........... 513
If your vehicle needs to be towed ........................................ 514
If your vehicle overheats ................576 Emergency flashers .............................. 512
Engine ....................................................... 587
ACCESSORY mode ....................... 179
Compartment ....................................... 471
Engine switch ........................................178
Hood........................................................468
How to start the engine....................178
Identification number...................... 586
If the engine will not start ............... 567
Ignition switch (engine switch) .....178
Overheating......................................... 576
Engine coolant ....................................... 476 Capacity................................................ 590
Checking ............................................... 476
Preparing and checking before winter .................................... 297
Engine coolant temperature gauge .......................................................... 81
Engine immobilizer system ................. 68
Engine oil ..................................................473 Capacity................................................ 588
Checking ............................................... 473
Preparing and checking before winter .................................... 297
Engine oil maintenance data ............475
Engine switch ........................................... 178
Enhanced VSC ......................................292
EPS (Electronic Power Steering) ........ 293 Warning light ....................................... 523
Event data recorder (EDR)................... 10
E

648Alphabetical index
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Moon roof................................................. 158
Door lock linked moon roof operation ..................... 159
Jam protection function ................... 159
Operation ............................................... 158
MP3 disc.................................................. 336
Multi-information display ..................... 86 Audio system-linked ...........................86
Drive information .................................. 92
Dynamic radar cruise control......239
LDA (Lane Departure Alert with steering control) ...................236
Navigation system-linked .................86
Settings .......................................................95
Warning message .............................529
Navigation system
*
Needle ......................................................... 95
Noise from under vehicle ....................... 8 Odometer .................................................... 81
Oil
Engine oil .............................................. 588
Front differential oil .............................591
Rear differential oil ............................ 592
Opener Hood........................................................468
Trunk .......................................................... 122
Outer foot lights Location ...................................................418
Replacing light bulbs ...................... 509
Wattage .................................................595
Outside rear view mirrors ................... 151 Adjusting and folding ......................... 151
Blind spot monitor ............................ 276
Linked mirror function when reversing.................................. 152
Mirror position memory ..................139
Outside rear view mirror defoggers.............................. 412
Outside temperature .............................. 81
Overheating, Engine ...........................576
N
O