engine overheat TOYOTA 4RUNNER 2021 (in English) User Guide

3034-5. Using the driving support systems
4
Driving
4RUNNER (U)
If the drive wheels spin, the slip
indicator flashes to indicate that
the AUTO LSD system has con-
trolled the spinning of the drive
wheels.
■If the engine is turned off and restarted
The AUTO LSD system and the indicators are automatically turned off.
■ Reactivation of the VSC syst em linked to vehicle speed
When the AUTO LSD system is turned on, the VSC, TRAC and Traile r Sway
Control systems will turn on automatically if vehicle speed inc rease.
■ If the brake system overheats
The system will cease operation and a buzzer will alert the driver. At this time,
the “AUTO LSD” indicator will flash and the “TRAC OFF” indicator will come
on. Stop the vehicle in a safe place. (There is no problem with continuing nor-
mal driving.) The system will be automatically restored after a short time.
When the AUTO LSD system is operating
WARNING
■To avoid an accident
Failure to do so, a much greater steering effort and more careful cornering
control will be required.
● Do not use the AUTO LSD system in conditions other than when on e of
the drive wheels spinning occurs in a ditch or rough surface.
● Do not drive with the AUTO LSD system continuously turned on.
NOTICE
■Activating while driving
Do not activate the AUTO LSD system if the wheel is slipping.
Stop the slipping or spinning before activating.

3124-5. Using the driving support systems
4RUNNER (U)■
Automatic system cancelation
In the following situations, the system will cease operation an d a buzzer will
sound to alert the driver. The Cr awl Control indicator will flash until the system
is turned off completely.
● When the shift lever is shifted to P or N
● When the front-wheel drive control lever or switch is shifted t o H4
● When the driver’s door is opened
● When the system is malfunctioning
● When the brake system overheats
Stop the vehicle in a safe place. (There is no problem with con tinuing normal
driving.)
● When the automatic transmission system overheats
Stop the vehicle in a safe place until the automatic transmissi on fluid tem-
perature warning light goes off.
■ Sounds and vibrations caused by the Crawl Control system
● A sound may be heard from the engine compartment when the engin e is
started or just after the vehicle begins to move. This sound do es not indicate
that a malfunction has occurred in Crawl Control system.
● Either of the following conditions may occur when the Crawl Con trol system
is 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 after the vehicle comes to a stop.
■ When there is a malfunction in the system
Warning lights and/or warning messages will turn on. ( P. 474, 484)
WARNING
■When using Crawl Control
● Do not overly rely on Crawl Control. This function does not ext end the
vehicle’s performance limitations. Always check the terrain tho roughly and
drive safely.
● The recommended speed modes for the listed terrains ( P. 311) are only
a reference. The selected mode may not be suitable to actual of f-road con-
ditions due to factors such as the type or unevenness of the te rrain or the
degree of incline. Check the actual terrain thoroughly and drive safely.
● After activating Crawl Control, make sure that the Crawl Contro l indicator
comes on. If the indicator flashes, the vehicle is not under system control.
■ Conditions under which the system may not operate correctly
When driving on the following surfaces, the system may not be a ble to
maintain a fixed low speed, which may result in an accident:
● Extremely steep inclines
● Extremely uneven surfaces
● Snow-covered roads, or other slippery surfaces

3555-1. Using the air conditioning system and defogger
5
Interior features
4RUNNER (U)
Seat heaters/seat ventilators
: If equipped
The seat heaters warm the seats and the seat ventilators main-
tain good airflow by blowi ng air through the seats.
WARNING
●Care should be taken to prevent injury if anyone in the following categories
comes in contact with the seats when the heater is on:
• Babies, small children, the elderly, the sick and the physical ly chal-
lenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sle eping
drugs, cold remedies, etc.)
● Observe the following precautions to prevent the minor burns or overheat-
ing
• 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 uneven surface on the sea t and do
not stick sharp objects (needles, nails, etc.) into the seat.
● To prevent battery discharge, do not use the functions when the engine is
off.

461
When trouble arises7
4RUNNER (U)7-1. Essential information
Emergency flashers .......... 462
If your vehicle has to be stopped in an
emergency ...................... 463
If the vehicle is trapped in rising water ..................... 465
7-2. Steps to take in an emergency
If your vehicle needs to be towed .............................. 466
If you think something is wrong .............................. 472
Fuel pump shut off system ............................ 473
If a warning light turns on or a warning buzzer
sounds ............................ 474
If a warning message is displayed......................... 484
If you have a flat tire.......... 489
If the engine will not start ................................. 504
If you cannot operate back door opener ............ 506
If the electronic key does not operate properly
(vehicles with a smart
key system)..................... 507
If the vehicle battery is discharged ...................... 510
If your vehicle overheats ........................ 514
If the vehicle becomes stuck ............................... 517

5147-2. Steps to take in an emergency
4RUNNER (U)
●The needle of the engine coolant temperature gauge ( P. 8 8 )
enters the red zone o r a loss of engine power is experienced.
(For example, the vehicle speed does not increase.)
● Steam comes out f rom under the hood.
Stop the vehicle in a safe place and turn off the air condition ing sys-
tem, 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, inspect the
hoses and radiator core (radia-
tor) for any leaks. Radiator
Cooling fan
If a large amount of coolant leaks,
immediately contact your Toyota
dealer.
The coolant level is satisfactory
if it is between the “F” and “L”
lines on the reservoir.Reservoir
“F” line
“L” line
Radiator cap
If your vehicle overheats
The following may indicate that your vehicle is overheating:
Correction procedures
1
2
3
1
2
4
1
2
3
4

581Alphabetical index
4RUNNER (U)
Child safety ................................ 52Airbag precautions .................. 37
Back door precautions .......... 133
Battery precautions ....... 418, 513
Child restraint system ............. 53
How your child should
wear the seat belt ................. 31
Installing child restraints ......... 57
Moon roof precautions .......... 173
Power window lock switch .... 162
Power window precautions ... 165
Rear door child-protectors .... 114
Removed electronic key battery precautions ...... 445
Seat belt extender precautions ........................... 34
Seat belt precautions .............. 56
Seat heater precautions........ 355
Child-protectors....................... 114
Cleaning ........................... 392, 395 Exterior ................................. 392
Interior................................... 395
Seat belts .............................. 396
Wheels and wheel ornaments .......................... 393
Clock ......................................... 373
Compass .................................... 92
Condenser ................................ 414
Console box ............................. 361
Cooling system Engine overheating ............... 514
Crawl Control ........................... 310
Cruise control Dynamic radar cruise control................................. 272
Cup holders.............................. 362
Curtain shield airbags ............... 35
Customizable features ............ 545 Daytime running light
system.................................... 228
Defogger Front windshield ................... 349
Outside rear view
mirrors ........................ 342, 349
Rear window ................. 342, 349
Dimension ................................ 520
Dinghy towing.......................... 208
Display Dynamic radar cruise control ................................ 272
LDA
(Lane Departure Alert) ....... 264
Multi-information display ......... 90
Trip information....................... 90
Warning message................. 484
Do-it-yourself maintenance .... 404
Door courtesy lights Wattage ................................ 529
Doors Automatic door locking
and unlocking system......... 115
Back door ............................. 131
Door lock ...................... 113, 132
Door windows ....................... 162
Open door warning buzzer ... 120
Open door warning light ....... 476
Outside rear view mirrors ..... 160
Rear door child-protector ...... 114
Side doors ............................ 110
Downhill assist control
system.................................... 307
Drive-Start Control .................. 177
Driver’s seat position memory .................................. 149D

582Alphabetical index
4RUNNER (U)
Driving ...................................... 176Break-in tips .......................... 178
Correct driving posture ........... 28
Driving assist systems .......... 320
Off-road precautions ............. 333
Procedures ........................... 176
Winter drive tips .................... 329
Dynamic radar cruise
control .................................... 272
Eco Driving Indicator ................ 97
EDR (Event data recorder) ........ 10
Electronic key .......................... 102 Battery-saving function ......... 121
If the electronic key does not operate properly ................. 507
Replacing the battery ............ 443
Emergency, in case of
If the electronic key does not operate
properly .............................. 507
If the engine will not start ...... 504
If the vehicle battery is discharged .......................... 510
If the warning buzzer sounds ................................ 474
If the warning light turns on ....................................... 474
If a warning message is displayed......................... 484
If you cannot operate
back door opener ............... 506
If you have a flat tire ............. 489
If you think something is wrong .............................. 472
If your vehicle becomes stuck ................................... 517
If your vehicle has to be stopped in an emergency ... 463
If your vehicle needs
to be towed ......................... 466
If your vehicle overheats ....... 514 Emergency flashers ................ 462
Engine
ACCESSORY mode ............. 213
Compartment ........................ 408
Engine switch ............... 209, 212
Hood ..................................... 407
How to start the engine ........................ 209, 212
Identification number ............ 521
If the engine will not start ...... 504
Ignition switch (engine switch) ........... 209, 212
Overheating .......................... 514
Engine coolant......................... 412
Capacity................................ 524
Checking............................... 412
Preparing and checking before winter ...................... 329
Engine coolant temperature gauge ....................................... 88
Engine immobilizer system ...... 76
Engine oil ................................. 410 Capacity................................ 523
Checking............................... 410
Preparing and checking
before winter ...................... 329
Engine switch .................. 209, 212
Event data recorder (EDR)........ 10
Flat tire ..................................... 489
Floor mats .................................. 26
Fluid
Automatic transmission ........ 527
Brake .................................... 527
Power steering...................... 528
Washer ................................. 420
Fog lights ................................. 234
Replacing light bulbs ............ 449
Switch ................................... 234
Wattage ................................ 529
Four-wheel drive system............................ 292, 296
E
F

586Alphabetical index
4RUNNER (U)
Multi Terrain ABS .................... 320
Multi-information display .......... 90Driving information .................. 93
Dynamic radar cruise control................................. 272
Language .............................. 555
LDA (Lane Departure Alert)........ 264
Outside temperature ............... 97
PCS (Pre-Collision System)........ 254
Settings ................................... 96
Warning messages ............... 484
Multi-terrain Select .................. 313
Navigation system
*
Noise from under vehicle............ 8
Odometer.................................... 88
Off-road precaution s ............... 333
Oil Engine oil .............................. 410
Opener Back door.............................. 132
Hood ..................................... 407
Outer foot lights....................... 357
Outside rear view mirrors ....... 160
Adjusting and folding ............ 160
Outside rear view mirror defoggers ......... 342, 349
Outside temperature display ...................................... 97
Overhead console ................... 364
Overheating, Engine................ 514 Parking brake........................... 224
Operation .............................. 224
Parking brake engaged warning buzzer ................... 474
PCS (Pre-Collision System).......... 254 Warning light......................... 214
Parking lights........................... 225 Light switch ........................... 225
Replacing light bulbs ............ 452
Wattage ................................ 529
Pen holder ................................ 365
Personal lights......................... 358
Power back window ................ 166 Jam protection function ........ 168
Operation .............................. 166
Power outlets ................... 374, 378
Power steering Fluid ...................................... 416
Warning light......................... 476
Power windows ....................... 162 Door lock linked
window operation ............... 164
Jam protection function ........ 163
Operation .............................. 162
Window lock switch .............. 162
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