engine overheat LEXUS LX570 2020 User Guide

LX570_OM_OM60R61U_(U)
3174-5. Using the driving support systems
4
Driving
■Automatic system cancelation
Crawl Control
In the following situations, the buzzer will sound intermittently and Crawl Control will be
canceled automatically. In this event, the Crawl Control indicator will flash and then go
off, the Turn Assist indicator will go off (if th e Turn Assist function is in use), and a message
stating that Crawl Cont rol has been turned off will be di splayed on the multi-information
display for several seconds.
●When the shift lever is moved to P or N.
●When the four-wheel drive control switch is in H4.
●When the driver’s door is opened.
Turn Assist function
When the center differential is locked, the buzzer will sound intermittently and the Turn
Assist function will be canceled automatically. In this event, the Turn Assist indicator will
go off, and a message stating that the Turn Assi st function has been turned off will be dis-
played on the multi-informatio n display for several seconds.
■Function limitations
Crawl Control
●In the following situations, brake control can be used to drive downhill at a constant
speed. However, engine control is not available when driving uphill at a constant speed.
•When switched to second start mode.
●In the following situation, engine control an d brake control will stop temporarily. In this
event, the Crawl Control indicator will flash.
• When the vehicle speed exceeds approximately 15 mph (25 km/h).
Turn Assist function
In the following situations, the Turn Assist func tion will stop temporarily. In this event, the
Turn Assist indicator will flash.
●When the vehicle speed exceeds approximately 6 mph (10 km/h).
●When the shift lever is moved to R.
■When the Crawl Control system is operated continuously
●If Crawl Control is used continuously for a long time, the buzzer will sound, a malfunc-
tion notification will be displayed on the multi-information display, the Crawl Control
indicator will go off, and Crawl Control will be temporarily inoperable as a result of the
brake system overheating. In this event, stop the vehicle immediately in a safe place,
and allow the brake system to cool down sufficiently until the TRAC OFF indicator
goes off. (In the meantime, normal driving is possible.)
●If Crawl Control is used continuously for a long time, the buzzer will sound, the system
will be temporarily canceled, and a malfunct ion notification will be displayed on the
multi-information display as a result of th e automatic transmission system overheating.
Stop the vehicle in a safe place until the display goes off.
■When depressing the accelerator pedal while the Crawl Control is operating
Multi-terrain Select operates in AUTO mode. ( P. 320)

386
LX570_OM_OM60R61U_(U)4-5. Using the driving support systems
■Automatic Active TRAC reactivation
If only the Active TRAC system is turned of
f, the Active TRAC system will turn on when
vehicle speed increases.
■Automatic Active TRAC, VSC and Trailer Sway Control reactivation
If the Active TRAC, VSC and Trailer Sway Control are turned off, the systems will not
turn on even when vehicle speed increases.
■If the brake system overheats
The brake system may overheat . In this case, a buzzer will sound, and the TRAC OFF
indicator will flash, and Active TRAC and hill-s tart assist control will be temporarily inop-
erable. In this event, stop the vehicle immedi ately in a safe place, and allow the brake sys-
tem to cool down sufficiently until the TR AC OFF indicator goes off. (There is no
problem with continuing normal driving.)
■Sounds and vibrations caused by the Multi Terrain AB S, brake assist, Active TRAC,
VSC, Trailer Sway Control, hill -start assist control and VGRS
●A sound may be heard from the engine compartment when the engine is started or just
after the vehicle begins to move. This soun d does not indicate that a malfunction has
occurred in any of these systems.
●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 afte r the vehicle comes to a stop.
• The brake pedal may pulsate slightly af ter the Multi Terrain ABS is activated.
• The brake pedal may move down slightly after the Multi Terrain ABS is activated.
■Hill-start assist control is operational when
●The shift lever is in D or S.
●The brake pedal is not depressed.
■VGRS is disabled in the following situations
●During stopping or the steering wheel has been moved for a long time while driving at
lower speeds.
●After the engine is restarted at less than -22°F (-30°C).
●If you disconnect the battery with the steering wheel turned, the center position of the
steering wheel could be slightly and tempor ary changed. To initialize the VGRS, drive
for a short while.

421
LX570_OM_OM60R61U_(U)5-3. Using the air conditio
ning system and defogger
5
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. Seat ventilators maintain good airflow by blowing 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 pr event 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.

513
LX570_OM_OM60R61U_(U)
7When trouble arises
7-1. Essential informationEmergency flashers ................... 514
If your vehicle has to be stopped in an emergency..... 515
If the vehicle is trapped in rising water ............................ 516
7-2. Steps to take in an emergency If your vehicle needs to be towed..................................517
If you think something is wrong ........................................... 523
Fuel pump shut off system ...... 524
If a warning light turns on or a warning buzzer
sounds.......................................... 525
If a warning message is displayed.....................................533
If you have a flat tire .................. 537
If the engine will not start ........ 549
If the electronic key does not operate properly .............. 551
If the vehicle battery is discharged .................................554
If your vehicle overheats ......... 557
If the vehicle becomes stuck .............................................560

557
LX570_OM_OM60R61U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If your vehicle overheats
Stop the vehicle in a safe place and turn 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 suff iciently, inspect 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 following may indicate that your vehicle is overheating.
●The needle of the engine coolant temperature gauge ( P. 92) enters the
red zone or a loss of engine power is experienced. (For example, the vehicle
speed does not increase.)
●Steam is coming from under the hood.
Correction procedures
1
2
3
1
2

621Alphabetical index
LX570_OM_OM60R61U_(U)
Coolant..................................................... 568Capacity ................................................ 568
Checking................................................482
Preparing and checking before winter ................................... 389
Cooling system Engine overheating...........................557
Crawl Control .........................................314
Cruise control Cruise control..................................... 288
Dynamic radar cruise control with full-speed range .................... 276
Cup holders ..............................................431
Curtain shield airbags ........................... 38
Customizable features ....................... 586
Daytime running light system .......... 229
Defogger Outside rear view mirrors .............. 413
Rear window ......................................... 413
Windshield ............................................. 413
Differential ............................................... 569
Dimension ............................................... 564
Dinghy towing......................................... 210 Display
Crawl Control....................................... 314
Drive information.................................. 99
Dynamic radar cruise control with full-speed range ................... 276
Fuel consumption information ......... 111
Head-up display ................................. 105
Intuitive parking assist...................... 295
LDA (Lane Departure Alert)......... 271
Multi-information display.................. 96
Multi-terrain Monitor ....................... 323
Multi-terrain Select .............................319
Warning messages .......................... 533
Do-it-yourself maintenance.............. 474
Door courtesy lights Location ................................................. 425
Doors Automatic door locking and unlocking system.............................. 125
Back door................................................128
Door glasses ............................................ 171
Door lock...................................................121
Open door warning buzzer ........ 527
Open door warning light .............. 527
Outside rear view mirrors ............. 168
Rear door child-protectors ............ 124
Side doors .................................................121
D
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

622Alphabetical index
LX570_OM_OM60R61U_(U)
Drive information .................................... 99
Driver’s seat belt reminder light ..... 527
Driver’s seat position memory ..........157
Driving........................................................ 180 Break-in tips ............................................ 181
Correct posture..................................... 28
Driving in the rain.................................. 181
Driving mode select switch ........... 291
Off-road precautions.......................393
Procedures ............................................180
Winter drive tips ................................ 389
Driving position memory..................... 157 Driving position memory ................ 157
Memory recall function.................... 158
Power easy access system ............ 157
DVD player
*
Dynamic radar cruise control with full-speed range Function .................................................. 276
Eco Driving Indicator Light ...................91
EDR (Event data recorder) ...................10
Electronic key ........................................... 116 Battery-saving function .................... 140
If the electronic key does not operate properly.............................. 551
Replacing the battery ...................... 507 Emergency, in case of
If a warning buzzer sounds .......... 525
If a warning light turns on .............. 525
If a warning message is displayed ............................................ 533
If the electronic key does not operate properly ............................. 551
If the engine will not start ............... 549
If the vehicle battery is discharged.........................................554
If the vehicle is trapped in rising water ..........................................516
If you have a flat tire .......................... 537
If you lose your keys..................118, 120
If you think something is wrong................................................... 523
If your vehicle becomes stuck.... 560
If your vehicle has to be stopped in an emergency.............................. 515
If your vehicle needs to be towed ..................................................... 517
If your vehicle overheats ................ 557
Emergency flashers .............................. 514
E

623Alphabetical index
LX570_OM_OM60R61U_(U)
EngineAccessory mode.................................. 212
Air cleaner .............................................475
Compartment...................................... 477
Engine switch .......................................... 211
Exhaust gas precautions ................... 73
Hood ........................................................ 476
How to start the engine ..................... 211
Identification number ...................... 565
If the engine will not start............... 549
If your vehicle has to be stopped in an emergency ........... 515
Ignition switch (engine switch) ..................................................... 211
Overheating .........................................557
Engine compartment cover ............. 478
Engine coolant....................................... 482 Capacity ................................................ 568
Checking................................................482
Preparing and checking before winter ................................... 389
Engine coolant temperature gauge ........................................................ 92
Engine immobilizer system ................. 80
Engine oil ................................................. 479 Capacity ................................................ 566
Checking................................................ 479
Preparing and checking before winter ................................... 389 Engine switch (ignition switch) ...........211
Engine switch light
(ignition switch light)........................ 425
Event data recorder (EDR)................... 10
Exhaust gas precautions ....................... 73
First-aid kit holder ................................ 436
Flat tire .......................................................537
Floor mats....................................................26
Fluid Automatic transmission ..................569
Brake........................................................ 570
Steering .................................................. 570
Washer ...................................................489
Fog lights...................................................236 Replacing light bulbs ......................... 512
Switch ...................................................... 236
Footwell lights .........................................425
Four-wheel AHC (Active Height Control Suspension) ....................... 302 Easy access mode ............................304
Disabling the height control .........305
Selecting vehicle height.................. 302
Four-wheel drive system Center differential lock/unlock ...........................................311
Four-wheel drive control switch .................................................... 310
Warning light ....................................... 527
Front automatic air conditioning system .....................................................407
Front doors .................................................121
F
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.

627Alphabetical index
LX570_OM_OM60R61U_(U)
Multi-information display ..................... 96Crawl Control ...................................... 314
Display contents ....................................96
Drive information ..................................99
Dynamic radar cruise control with full-speed range .................... 276
Fuel consumption information ......... 111
Intuitive parking assist ......................295
Language ...............................................597
LDA (Lane Departure Alert) .........271
Multi-information display ..................96
Switching the display...........................98
Multi terrain ABS.................................. 384
Multi-terrain Monitor ......................... 323
Multi-terrain Select................................319
Navigation system
*
Noise from under vehicle ....................... 8
Odometer .................................................. 93
Off road precautions .......................... 393
Oil Engine oil............................................... 566
Front differential oil........................... 569
Rear differential oil ............................ 569
Transfer oil ............................................ 570
Opener Back door ............................................... 129
Fuel filler door ......................................248
Hood ........................................................ 476 Outside rear view mirrors ..................168
Adjusting and folding ....................... 168
Blind Spot Monitor ........................... 370
Driving position memory................. 157
Linked mirror function when reversing...............................................169
Mirror position memory .................. 157
Outside rear view mirror defoggers............................................. 413
Outside temperature display ............................................100, 107
Overheating, Engine ...........................557
Paddle shift switches............................. 219
Panic mode .................................................117
Parking assist sensors (Intuitive parking assist)...................294
Parking brake .........................................225 Operation.............................................. 225
Parking brake engaged warning buzzer ...............................528
Parking lights ......................................... 228 Light switch........................................... 228
Replacing light bulbs ......................... 512
PCS (Pre-Collision system) ............ 256 Enabling/disabling the system.... 260
Function .................................................. 256
Warning light ....................................... 526
Personal lights ........................................425 Switch .......................................................427
Power back door ...................................130
Power easy access system ................. 157
Power outlet ........................................... 440
N
O
P
*: Refer to the “NAVIGATION SYSTEM OWNER’S MANUAL”.