overheating Lexus IS300 2017 Owner's Manual / LEXUS 2017 IS200T,IS300,IS350 OWNER'S MANUAL (OM53D76U)

832. Instrument cluster
2
Instrument cluster
IS350/300/200t_U (OM53D76U)
■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.)
■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. 92)
■Customization
The meter display can be customized on the multi-information display. (→P. 92)
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. 566)

1744-2. Driving procedures
IS350/300/200t_U (OM53D76U)
■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. 109
■Conditions affe cting operation
→ P. 124
■Notes for the entry function
→P. 125
■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.

2924-5. Using the driving support systems
IS350/300/200t_U (OM53D76U)
■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.

4106-2. Using the air conditioning system
IS350/300/200t_U (OM53D76U)
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 ventila-
tors
∗
∗
: 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

5668-2. Steps to take in an emergency
IS350/300/200t_U (OM53D76U)
●The needle of the engine coolant temperature gauge ( →P. 79) 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

633Alphabetical index
IS350/300/200t_U (OM53D76U)
Child safety ................................................ 52Airbag precautions ..............................38
Battery precautions ............. 474, 565
Child restraint system ......................... 53
How your child should wear the seat belt .......................................... 32
Installing child restraints..................... 57
Moon roof precautions.................... 156
Power window lock switch ............ 149
Power window precautions .......... 152
Rear door child-p rotectors ............. 114
Removed electronic key battery precautions...............494
Seat belt extender precautions ........................................... 35
Seat belt precautions ..........................56
Seat heater precautions................... 410
Trunk precautions............................... 120
Child-protectors...................................... 114 Cleaning ....................................... 446, 450
Aluminum wheels .............................. 447
Exterior ................................................... 446
Interior .....................................................450
Seat belts..................................................451
Clock........................................................... 421
Coat hooks ..............................................425
Compass ................................................. 433
Condenser................................................ 471
Console box ............................................. 416
Cooling system ......................................469 Engine overheating ..........................566
Cruise control Dynamic radar cruise control ..... 236
Cup holders.............................................. 417
Current fuel consumption ................................100, 101
Curtain shield airbags ............................36
Customizable features ...................... 602

635Alphabetical index
IS350/300/200t_U (OM53D76U)
E-mail......................................................... 367
Eco drive mode ..................................... 285
Eco Driving Indicator..............................97
EDR (Event data recorder) ...................10
Elapsed time ............................................ 100
Electric Power Steering (EPS) ....... 290Warning light ........................................ 517
Electronic key ......................................... 106 Battery-saving function .....................123
If the electronic key does not operate properly............................ 559
Replacing the battery .......................493
Emergency, in case of If a warning message is displayed ........................................ 522
If the electronic key does not operate properly ....... 559
If the engine will not start................557
If the vehicle battery is discharged .........................................562
If the warning buzzer sounds................................................... 516
If the warning light turns on............ 516
If you have a flat tire ......................... 546
If you think something is wrong................................................ 514
If your vehicle becomes stuck ..................................................... 570
If your vehicle has to be stopped in an emergency ......... 507
If your vehicle needs to be towed ...................................... 508
If your vehicle overheats ............... 566 Emergency flashers ............................ 506
Engine ........................................................576
ACCESSORY mode ....................... 173
Compartment ..................................... 464
Engine switch ........................................ 172
Hood........................................................ 462
How to start the engine.................... 172
Identification number....................... 576
If the engine will not start ............... 557
Ignition switch (engine switch) ..... 172
Overheating.........................................566
Engine coolant .......................................469 Capacity.................................................. 581
Checking ............................................... 469
Preparing and checking before winter .................................... 294
Engine coolant temperature gauge ......................................................... 79
Engine immobilizer system ................. 68
Engine oil ..................................................466 Capacity................................................. 577
Checking ............................................... 466
Preparing and checking before winter .................................... 294
Engine oil maintenance data ........... 468
Engine switch ........................................... 172
Enhanced VSC ..................................... 289
EPS (Electronic Power Steering) ........ 290 Warning light ......................................... 517
Event data recorder (EDR)................... 10
E

640Alphabetical index
IS350/300/200t_U (OM53D76U)
Moon roof................................................. 153Door lock linked moon roof operation ..................... 154
Jam protection function ................... 154
Operation ............................................... 153
MP3 disc.................................................. 332
Multi-information display ..................... 84 Audio system-linked ...........................84
Drive information ..................................89
Dynamic radar cruise control......236
LDA (Lane Departure Alert with steering control) .....................231
Navigation system-linked .................84
Settings ....................................................... 92
Warning message ............................. 522
Navigation system
*
Needle ......................................................... 92
Noise from under vehicle ....................... 8 Odometer ................................................... 79
Oil
Engine oil ............................................... 577
Front differential oil ...........................582
Rear differential oil ............................582
Opener Hood........................................................ 462
Trunk ............................................................ 117
Outer foot lights Location ................................................... 412
Replacing light bulbs .......................502
Wattage ................................................ 586
Outside rear view mirrors .................. 146 Adjusting and folding ........................146
Blind spot monitor .............................273
Linked mirror function when reversing.................................. 147
Mirror position memory .................. 134
Outside rear view mirror defoggers............................406
Outside temperature ............................. 79
Overheating, Engine .......................... 566
N
O
*: For vehicles with a naviga tion system, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL”.