2011 TOYOTA TUNDRA engine overheat

282 2-5. Driving information
●To maintain engine braking efficiency when driving on a long steep
downgrade, do not use the transmission in D.
Transmission shift range position must be in 5 in the S mode (6-
speed models) or in 4 in the S mode (5-speed models).
● Instability happens more frequently when descending steep or long
downhill grades. Before descending, slow down and downshift. Do
not make sudden downshifts while descending steep or long down-
hill grades.
● Avoid holding the brake pedal down too long or applying the
brakes too frequently. This could cause the brakes to overheat and
result in reduced braking efficiency.
● Due to the added load of the trailer, your vehicle’s engine may
overheat on hot days (at temper atures over 85°F [30°C]) when
driving up a long or steep grade. If the engine coolant temperature
gauge indicates overheating, immediately turn off the air condition-
ing (if in use), pull your vehicle off the road and stop in a safe spot.
(  P. 637)
● Always place wheel blocks under both the vehicle’s and the
trailer’s wheels when parking. Ap ply the parking brake firmly, and
put the transmission in P. Avoid parking on a slope, but if unavoid-
able, do so only after performing the following:
Apply the brakes and keep them applied.
Have someone place wheel blo cks under both the vehicle’s
and trailer’s wheels.
When the wheel blocks are in place, release the brakes slowly
until the blocks absorb the load.
Apply the parking brake firmly.
Shift into P and turn off the engine.

493
3-8. Other interior features
3
Interior and exterior features
CAUTION
■
Burns
●Use caution when seating the following persons in a seat with the seat
heater on to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the disabled
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping
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 temperature
of the seat and may lead to overheating.
NOTICE
■To prevent seat heater damage
Do not put unevenly weighted objects on the seat and do not stick sharp
objects (needles, nails, etc.) into the seat.
■ To prevent battery discharge
Turn the switches off when the engine is not running.

495
3-8. Other interior features
3
Interior and exterior features
CAUTION
■
Burns
●Use caution when seating the following persons in a seat with the seat
heater on to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the disabled
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping
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 temperature
of the seat and may lead to overheating.
NOTICE
■To prevent seat heater damage
Do not put unevenly weighted objects on the seat and do not stick sharp
objects (needles, nails, etc.) into the seat.
■ To prevent battery discharge
Turn the switches off when the engine is not running.

When trouble arises5
587
5-1. Essential informationEmergency flashers ......... 588
If your vehicle needs to be towed ........................ 589
If you think something is wrong ............................. 595
Fuel pump shut off system ........................... 596
Event data recorder ......... 597 5-2. Steps to take in
an emergency
If a warning light turns on or a warning buzzer
sounds... ........................ 599
If a warning message is displayed (vehicles
with multi-information
display) .......................... 608
If you have a flat tire......... 612
If the engine will not start ................................ 628
If the shift lever cannot be shifted from P............ 630
If you lose your keys ........ 633
If the vehicle battery is discharged ..................... 634
If your vehicle overheats ....................... 637
If the vehicle becomes stuck .............................. 640
If your vehicle has to be stopped in
an emergency ................ 641

5
When trouble arises
637
5-2. Steps to take in an emergency
If your vehicle overheats
If your engine overheats:
Stop the vehicle in a safe place and turn off the air condi-
tioning system.
Check to see if steam is coming out from under the hood.
If you see steam: Stop the engine. Carefully lift the hood after the steam
subsides and then restart the engine.
If you do not see steam: Leave the engine running and carefully lift the hood.
Check to see if the cooling fan is operating.
If the fan is operating: Wait until the temperature of the engine (shown on the
instrument cluster) begins to fall and then stop the
engine.
If the fan is not operating: Stop the engine immediately and call your local Toyota
dealer.

5
When trouble arises
639
5-2. Steps to take in an emergency
■
Overheating
If you observe the following, your vehicle may be overheating.
●The engine coolant temperature gauge enters the red zone or a loss of
power is experienced.
● Steam is coming from under the hood.
● “ENGINE COOLANT HOT” is shown on the multi-information display
(vehicles with multi-information display).
CAUTION
■To prevent an accident or injury when inspecting under the hood of
your vehicle
●If steam is seen coming from under the hood, do not open the hood until
the steam has subsided. The engine compartment may be very hot, caus-
ing serious injury such as burns.
● Keep hands and clothing away from the fan and other belts while the
engine is running.
● Do not loosen the radiator cap while the engine and radiator are hot.
Serious injury, such as burns, may result from hot coolant and steam
released under pressure.
NOTICE
■When adding engine coolant
Wait until the engine has cooled down before adding engine coolant.
When adding coolant, do so slowly. Adding cool coolant to a hot engine too
quickly can cause damage to the engine.

720 Alphabetical index
Seat heater precautions ................. 493, 495
Child-protectors .........................49
Cleaning Exterior .................................. 516
Interior ................................... 519
Seat belts .............................. 520
Clock ........................................ 480
Compass ................................... 510
Condenser ................................ 540
Console box ............................. 455
Cooling system
Engine overheating ............... 637
CRS ........................................... 142
Cruise control........................... 220
Cup holders .............................. 468
Curtain shield airbags ............. 119
Customizable features..... 205, 683
Daytime running light
system .................................... 214
Deck hooks ............................... 500
Defogger
Back window ......................... 311
Side mirrors ................... 309, 311
Dimension................................. 644
Dinghy towing .......................... 288
Display Trip information ..................... 203
Warning message ................. 608
Do-it-yourself main tenance..... 528
Doors Door glasses ...........................94
Door lock ...........................44, 47
Open door warning........601, 609
Side doors ...............................47
Side mirrors .............................89
Driver’s seat belt reminder buzzer ..................................... 601
Driver’s seat belt
reminder light......................... 601 Driving
Break-in tips .......................... 173
Correct posture ..................... 117
Driving assist systems .......... 243
Procedures............................ 172
Winter driving tips ................. 261
Driving position memory .......... 68
DVD player................................ 390
Emergency flashers................. 588
Emergency flashers switch .... 588
Emergency, in case of Blown fuse ............................ 565
If the engine will not start ...... 628
If the shift lever cannot be shifted ................................. 630
If the vehicle has discharged battery .............. 634
If the warning buzzer
sounds ................................ 599
If the warning light turns on........................................ 599
If the warning message is displayed ......................... 608
If you have a flat tire ............. 612
If you lose your keys ............. 633
If you think something is wrong .............................. 595
If your vehicle becomes stuck ................................... 640
If your vehicle has to be
stopped in an emergency ... 641
If your vehicle needs to be towed ............................. 589
If your vehicle overheats ....... 637
Engine Compartment ........................ 533
Engine switch ........................ 181
Exhaust gas .......................... 178
Hood ..................................... 532
How to start the
engine ................................. 181
Identification number............. 655
D
E

721
Alphabetical index
If the engine will not start...... 628
Ignition switch ...................... 181
Immobilizer system............... 112
Overheating .......................... 637
Warning light ........................ 600
Engine coolant Capacity ............................... 660
Checking .............................. 539
Preparing and checking before winter ...................... 261
Engine coolan t temperature
gauge ..................................... 192
Engine immobilizer system .... 112
Engine oil Capacity ............................... 657
Checking .............................. 535
Preparing and checking before winter ...................... 261
Warning light ........................ 599
Engine oil maintenance
data ........................................ 537
Engine switch .......................... 181
Event data recorder ................ 597
FFV ................................... 107, 668
Flex-fuel ........................... 107, 668
Flexible fuel vehicle ........ 107, 668
Floor mat .................................. 498
Fluid Brake .................................... 540
Washer ................................. 545
Fog lights Replacing light bulbs ............ 581
Switch ................................... 216
Wattage ................................ 667
Four-wheel drive system ........ 236
Front fog lights Replacing light bulbs ............ 581
Switch ................................... 216
Wattage ................................ 667 Front passenger occupant
classification system ............135
Front passenger’s seat belt reminder light.........................601
Front passenger’s seat belt
warning buzzer ..............601, 603
Front seats Adjustment ..............................58
Front side marker lights Replacing light bulbs .............580
Switch....................................212
Wattage .................................667
Front turn signal lights Replacing light bulbs .............579
Switch....................................189
Wattage .................................667
Fuel
Capacity ................................657
Fuel gauge ............................192
Fuel pump shut off system ....596
Gas station information .........732
Information ............................668
Refueling ...............................107
Type ......................................657
Warning light .........................601
Warning message .................609
Fuel door...................................107
Fuel filler door ..........................107
Fuel pump shut off system .....596
Fuses.........................................565
Garage door opener.................503
Gas station information...........732
Gauges ......................................192
Glove box..................................453
F
G