2018 TOYOTA TUNDRA engine overheat

3054-5. Using the driving support systems
4
Driving
■Sounds and vibrations caused by the ABS, brake assist, VSC, TRAC,
Trailer Sway Control 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 aft er the vehicle
begins to move. This sound does not indicate that a malfunction has
occurred in any of these systems.
● Any of the following conditions may occur when the above system s are
operating. None of these indicates that a malfunction has occur red.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a s top.
• The brake pedal may pulsate slightly after the ABS is activate d.
• The brake pedal may move down slightly after the ABS is activa ted.
■ Automatic reactivation of TRAC, Trailer Sway Control and VSC sy stems
After turning the TRAC, Trailer Sway Control and VSC systems of f, the sys-
tems will be automatically re-enabled in the following situations:
● When the engine switch is turned off
● If only the TRAC system is turned off, the TRAC will turn on wh en vehicle
speed increases
If both the TRAC and VSC systems are turned off, automatic re-enabling will
not occur when vehicle speed increases.
■ If the brake system overheats
TRAC will cease operation, and the slip indicator will change f rom flashing to
being on continuously to alert the driver. Stop the vehicle in a safe place.
(There is no problem with continuing normal driving.)
■ Shifting to “4L”
VSC and Trailer Sway Control are automatically turned off.

4276-1. Using the air conditioning system
6
Interior features
■Seat ventilators
Blows air from the seat Hi
Mid
Lo
Off
The level indicator lights come on.
Pressing the button changes
modes in the following:
HiMid LoOff
■The seat heaters/seat ventilators can be used when
The engine switch is in the “ON” position.
■ Passenger seat ventilator timer (vehicles with seat ventilators )
● The ventilator operates on for 5 minutes after the button is pr essed.
● When the passenger is not detected, the automatically turns off the ventila-
tor after 5 minutes.
■ When not in use
Turn the seat heaters or seat ventilators off by pressing the b utton. The indi-
cator light turns off.
1
2
3
4
WARNING
■ Burns
● Use caution when seating the following persons in a seat with t he seat
heater on to avoid the possibility of burns:
• 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.)
● Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the t emperature
of the seat and may lead to overheating.
● Do not use seat heater more than necessary. Doing so may cause minor
burns or overheating.

537
8When trouble arises
8-1. Essential informationEmergency flashers .......... 538
If your vehicle has to be stopped in
an emergency ................. 539 8-2. Steps to take in an emergency
If your vehicle needs to be towed ......................... 540
If you think something is wrong .............................. 545
Fuel pump shut off system ............................ 546
If a warning light turns on or a warning buzzer
sounds ............................ 547
If a warning message is displayed......................... 555
If you have a flat tire.......... 565
If the engine will not start ................................. 580
If the vehicle battery is discharged ...................... 582
If your vehicle overheats ... 585
If the vehicle becomes stuck ............................... 588

585
8
When trouble arises
8-2. Steps to take in an emergency
If your vehicle overheats
●The needle of the engine coolant temperature gauge ( P. 9 5 )
enters the red zone or a loss of engine power is experienced. ( For
example, the vehicle speed does not increase.)
● “ENGINE COOLANT OVERTEMP” is shown on the multi-informa-
tion display.
● 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 following may indicate that your vehicle is overheating:
Correction procedures
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2
3
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2

659Alphabetical index
Installing CRS with top tether strap ........ 67, 70
Child safety ................................ 55
Airbag precautions .................. 42
Battery precautions ............... 584
Child restraint system ............. 56
How your child should wear the seat belt ................. 34
Installing child restraints ......... 60
Moon roof precautions .......... 157
Power back window precautions ......................... 153
Power window lock switch .... 147
Power window precautions ... 149
Rear door child-protector ...... 116
Removed wireless remote
control battery
precautions ......................... 517
Seat belt extender
precautions ........................... 37
Seat belt precautions .............. 59
Seat heater precautions........ 427
Child-protectors....................... 116
Cleaning ........................... 470, 473 Aluminum wheels.................. 471
Exterior ................................. 470
Interior................................... 473
Seat belts .............................. 474
Clock ......................................... 451
Compass .................................. 465
Condenser ................................ 490
Console box ............................. 435
Coolant ..................................... 488 Capacity ................................ 604
Checking ............................... 488
Preparing and checking before winter....................... 312
Cooling system ........................ 488 Engine overheating ............... 585
CRS ............................................. 56 Cruise control
Cruise control ....................... 266
Dynamic radar cruise control ...................... 252
Cup holders ............................. 442
Curtain shield airbags............... 39
Customizable features ............ 624
Daytime running light system.................................... 209
Deck hooks .............................. 449
Defogger Back window................. 414, 421
Outside rear view mirrors ........................ 414, 421
Windshield .................... 414, 421
Differential................................ 605
Dimensions .............................. 592
Dinghy towing.......................... 194
Display Drive information .................. 101
Dynamic radar
cruise control ...................... 252
LDA
(Lane Departure Alert) ....... 244
Multi-information display ....... 100
Trip information..................... 100
Warning message................. 555
Do-it-yourself maintenance .... 482
D

660Alphabetical index
Doors ........................................ 114Automatic door locking and unlocking system ......... 117
Door glasses ......................... 147
Door lock............................... 115
Open door warning message ............................. 557
Outside rear view mirrors...... 142
Rear door child-protector ...... 116
Side doors............................. 114
Driver’s seat position memory .................................. 128
Drive-Start Control .................. 161
Driving ...................................... 160
Break-in tips .......................... 162
Correct driving posture ........... 30
Driving assist system ............ 301
Procedures ........................... 160
Winter drive tips .................... 312
Dynamic radar cruise control ........................ 252 Constant speed
control mode....................... 257
Vehicle-to-vehicle distance control mode ........ 259 EDR (Event data recorder)........ 10
Emergency, in case of
If the engine will not start ...... 580
If the vehicle has discharged battery ................................ 582
If the warning buzzer sounds................................ 547
If the warning light turns on ....................................... 547
If the warning message
is displayed ........................ 555
If you have a flat tire ............. 565
If you lose your keys ............. 111
If you think something is wrong .............................. 545
If your vehicle becomes
stuck ................................... 588
If your vehicle has to be stopped in an emergency ... 539
If your vehicle needs to be towed......................... 540
If your vehicle overheats....... 585
Emergency flashers ................ 538
Engine “ACC” position ...................... 195
Compartment ........................ 485
Engine switch ....................... 195
Hood ..................................... 484
How to start the engine......... 195
Identification number ............ 600
If the engine will not start ...... 580
Ignition switch
(engine switch) ................... 195
Immobilizer system .. ............... 76
Overheating .......................... 585
Engine coolant......................... 488 Capacity................................ 604
Checking............................... 488
Preparing and checking before winter ...................... 312
Engine coolant temperature gauge ....................................... 95E

664Alphabetical index
MaintenanceDo-it-yourself maintenance ... 482
General maintenance ........... 478
Maintenance data ................. 592
Maintenance requirements ... 476
Resetting the message indicating maintenance is
required .............................. 477
Malfunction indicator lamp ..... 547
Manual headlight leveling dial .......................................... 208
Map holder ............................... 438
Master warning light........ 548, 555
Meter Indicators ................................ 92
Instrument panel light control................................... 97
Meters ..................................... 95
Multi-information display ....... 100
Warning lights ......................... 91
Mirrors Inside rear view mirror .......... 139
Outside rear view
mirror defoggers ......... 414, 421
Outside rear view mirrors...... 142
Vanity mirrors........................ 450
Moon roof ................................. 154 Door lock linked
moon roof operation ........... 155
Jam protection function......... 154
Operation .............................. 154
MP3 disc ................................... 342 Multi-information display........ 100
Customizing vehicle features .............................. 624
Drive information .................. 101
Dynamic radar cruise control ...................... 252
LDA
(Lane Departure Alert) ....... 244
Settings................................. 104
Trip information..................... 100
Warning message................. 555
Noise from under vehicle ........... 8
Odometer ............................. 95, 97
Off-road precaution s ............... 316
Oil
Engine oil .............................. 602
Differential oil ........................ 605
Transfer oil............................ 606
Opener Hood ..................................... 484
Outer foot lights
Location ................................ 429
Replacing light bulbs ............ 534
Wattage ................................ 609
Outside rear view mirrors ....... 142 Adjusting and folding ............ 142
Blind spot monitor ................. 286
Mirror position memory ......... 128
Outside rear view mirror defoggers ......... 414, 421
Outside temperature display...................................... 95
Overhead console ................... 441
Overheating ............................. 585
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