engine overheat LEXUS LX570 2019 User Guide

316
LX570_OM_OM60R07U_(U) 4-5. Using the driving support systems■
Automatic system cancelation 
Crawl Control
In the following situations, the buzzer will sound intermittently an d 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 inte rmittently 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 drivin g uphill at a co nstant 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. 319)

LX570_OM_OM60R07U_(U) 3854-5. Using the driving support systems
4
Driving ■
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 Tr ailer 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 w ill 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.

419
LX570_OM_OM60R07U_(U) 5-3. Using the air conditio ning system and defogger
5
Interior features
Heated steering wheel 
/seat heaters/seat
ventilators 
 : If equippedHeated 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 ph ysically 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.

511
LX570_OM_OM60R07U_(U) 7When trouble arises 7-1. Essential information
Emergency flashers ................... 512
If your vehicle has to be
stopped in an emergency..... 513
If the vehicle is trapped
in rising water ............................ 514
7-2. Steps to take in an emergency
If your vehicle needs
to be towed................................. 515
If you think something is
wrong ............................................ 521
Fuel pump shut off system ...... 522
If a warning light turns
on or a warning buzzer
sounds.......................................... 523
If a warning message is
displayed...................................... 531
If you have a flat tire ..................535
If the engine will not start ........ 547
If the electronic key does
not operate properly ............. 549
If the vehicle battery is
discharged ................................. 552
If your vehicle overheats .........555
If the vehicle becomes
stuck ............................................ 558

555
LX570_OM_OM60R07U_(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 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 suff iciently, inspect th e 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

619Alphabetical index
LX570_OM_OM60R07U_(U) Coolant..................................................... 566
Capacity ................................................ 566
Checking............................................... 480
Preparing and checking
before winter ................................... 388
Cooling system
Engine overheating.......................... 555
Crawl Control .........................................313
Cruise control
Cruise control......................................287
Dynamic radar cruise control
with full-speed range .................... 275
Cup holders ............................................ 429
Curtain shield airbags ........................... 38
Customizable features ....................... 584
Daytime running light system .......... 228
Defogger
Outside rear view mirrors ................ 411
Rear window ........................................... 411
Windshield ............................................... 411
Differential ............................................... 567
Dimension ............................................... 562
Dinghy towing......................................... 210 Display
Crawl Control....................................... 313
Drive information.................................. 99
Dynamic radar cruise control
with full-speed range ................... 275
Fuel consumption information ......... 111
Head-up display ................................. 105
Intuitive parking assist...................... 294
LDA (Lane Departure Alert)....... 270
Multi-information display.................. 96
Multi-terrain Monitor ....................... 322
Multi-terrain Select ............................ 318
Warning messages ............................531
Do-it-yourself maintenance.............. 472
Door courtesy lights
Location ................................................. 423
Doors
Automatic door locking and
unlocking system.............................. 125
Back door................................................128
Door glasses ............................................ 171
Door lock...................................................121
Open door warning buzzer ........ 525
Open door warning light .............. 525
Outside rear view mirrors ............. 168
Rear door child-protectors ............ 124
Side doors .................................................121D
* : Refer to
the “NAVIGATION SYSTEM OWNER’S MANUAL”.

620 Alphabetical index
LX570_OM_OM60R07U_(U) Drive information .................................... 99
Driver’s seat belt reminder light ..... 525
Driver’s seat position memory ..........157
Driving........................................................ 180
Break-in tips ............................................ 181
Correct posture..................................... 28
Driving in the rain.................................. 181
Driving mode select switch ......... 290
Off-road precautions.......................392
Procedures ............................................180
Winter drive tips ................................ 388
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 .................................................. 275
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............................ 549
Replacing the battery ...................... 505 Emergency, in case of
If a warning buzzer sounds .......... 523
If a warning light turns on .............. 523
If a warning message is
displayed ..............................................531
If the electronic key does not
operate properly ............................549
If the engine will not start ............... 547
If the vehicle battery is
discharged......................................... 552
If the vehicle is trapped in
rising water ..........................................514
If you have a flat tire ..........................535
If you lose your keys..................118, 120
If you think something is
wrong..................................................... 521
If your vehicle becomes stuck.... 558
If your vehicle has to be stopped
in an emergency...............................513
If your vehicle needs to be
towed .................................................... 515
If your vehicle overheats ................555
Emergency flashers .............................. 512E

621Alphabetical index
LX570_OM_OM60R07U_(U) Engine
Accessory mode.................................. 212
Air cleaner ............................................. 473
Compartment......................................475
Engine switch .......................................... 211
Exhaust gas precautions ................... 73
Hood ........................................................ 474
How to start the engine ..................... 211
Identification number ...................... 563
If the engine will not start................547
If your vehicle has to be
stopped in an emergency ........... 513
Ignition switch (engine
switch) ..................................................... 211
Overheating ........................................ 555
Engine compartment cover ............. 476
Engine coolant.......................................480
Capacity ................................................ 566
Checking............................................... 480
Preparing and checking
before winter ................................... 388
Engine coolant temperature
gauge ........................................................ 92
Engine immobilizer system ................. 80
Engine oil ..................................................477
Capacity ................................................ 564
Checking................................................ 477
Preparing and checking
before winter ................................... 388 Engine switch (ignition switch) ...........211
Engine switch light
(ignition switch light)........................ 423
Event data recorder (EDR)................... 10
Exhaust gas precautions ....................... 73
First-aid kit holder .................................434
Flat tire ...................................................... 535
Floor mats....................................................26
Fluid
Automatic transmission .................. 567
Brake....................................................... 568
Steering ................................................. 568
Washer ................................................... 487
Fog lights.................................................. 235
Replacing light bulbs ........................ 510
Switch ...................................................... 235
Footwell lights .........................................423
Four-wheel AHC (Active Height
Control Suspension) .........................301
Easy access mode ............................303
Disabling the height control .........304
Selecting vehicle height................... 301
Four-wheel drive system
Center differential
lock/unlock ........................................ 310
Four-wheel drive control
switch ...................................................309
Warning light ....................................... 525
Front automatic air conditioning
system .................................................... 405
Front doors .................................................121 F
* : Refer to
the “NAVIGATION SYSTEM OWNER’S MANUAL”.

625Alphabetical index
LX570_OM_OM60R07U_(U) Multi-information display ..................... 96
Crawl Control ...................................... 313
Display contents ....................................96
Drive information ..................................99
Dynamic radar cruise control
with full-speed range .................... 275
Fuel consumption information ......... 111
Intuitive parking assist ......................294
Language .............................................. 595
LDA (Lane Departure Alert) .......270
Multi-information display ..................96
Switching the display...........................98
Multi terrain ABS.................................. 383
Multi-terrain Monitor ......................... 322
Multi-terrain Select............................... 318
Navigation system
*Noise from under vehicle ....................... 8
Odometer .................................................. 93
Off road precautions .......................... 392
Oil
Engine oil............................................... 564
Front differential oil............................567
Rear differential oil .............................567
Transfer oil ............................................ 568
Opener
Back door ............................................... 129
Fuel filler door ......................................246
Hood ........................................................ 474 Outside rear view mirrors ..................168
Adjusting and folding ....................... 168
Blind Spot Monitor ........................... 369
Driving position memory................. 157
Linked mirror function when
reversing...............................................169
Mirror position memory .................. 157
Outside rear view mirror
defoggers...............................................411
Outside temperature
display ............................................100, 107
Overheating, Engine .......................... 555
Paddle shift switches............................. 218
Panic mode .................................................117
Parking assist sensors
(Intuitive parking assist).................. 293
Parking brake .........................................224
Operation.............................................. 224
Parking brake engaged
warning buzzer ............................... 526
Parking lights .......................................... 227
Light switch............................................227
Replacing light bulbs ........................ 510
PCS (Pre-Collision system) ............ 255
Enabling/disabling the system.... 259
Function .................................................. 255
Warning light ....................................... 524
Personal lights ........................................423
Switch ...................................................... 425
Power back door ...................................130
Power easy access system ................. 157
Power outlet ........................................... 438N
O P
* : Refer to
the “NAVIGATION SYSTEM OWNER’S MANUAL”.