2012 TOYOTA TUNDRA cooling

307
3-1. Using the air conditioning system and defogger
3
Interior and exterior features
Manual air conditioning system
Adjusting the settings■ Adjusting the temperature setting
Driver’s side temperature control dial
Turn the temperature control dial clockwise (warm) or counter-
clockwise (cool).
If is not pressed, the system will blow ambient temperature air
or heated air.
For quick cooling, turn the temperature control dial to the MAX A/C
position.
The air conditioning will automatically turn on and the air intake selector
will be set to recirculated air mode.
: If equipped
Outside air or recirculated
air mode
Air outlet selection dial
Air conditioning ON/OFF switch
Driver’s side temperature
control dial
Fan speed control dial
Front passenger’s
side temperature
control dial

540 4-3. Do-it-yourself maintenance
CAUTION
The engine compartment contains many mechanisms and fluids that may
move suddenly, become hot, or become electrically energized. To avoid death
or serious injury observe the following precautions.
■When working on the engine compartment
●Keep hands, clothing, and tools away from the moving fan and engine
drive belt.
● Be careful not to touch the engine, radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil and other fluids may also be hot.
● Do not leave anything that may burn easily, such as paper or rags, in the
engine compartment.
● Do not smoke, cause sparks or expose an open flame to fuel or the bat-
tery. Fuel and battery fumes are flammable.
● Be extremely cautious when working on the battery. It contains poisonous
and corrosive sulfuric acid.
● Take care because brake fluid can harm your hands or eyes and damage
painted surfaces.
If fluid gets on your hands or in your eyes, flush the affected area with
clean water immediately.
If you still experience discomfort, see a doctor.
■ When working near the cooling fan or radiator grille
Be sure the engine switch is off.
With the engine switch on, the cooling fan may automatically start to run if
the air conditioning is on and/or the coolant temperature is high.
■ Safety glasses
Wear safety glasses to prevent flying or falling material, fluid spray, etc. from
getting in the eyes.

549
4-3. Do-it-yourself maintenance
4
Maintenance and care
Engine coolant
The coolant level is satisfactory if it is between the FULL and LOW
lines on the reservoir when the engine is cold.
Reservoir cap
FULL
LOW
If the level is on or below the
LOW line, add coolant up to the
FULL line.
■If the coolant level drops within a short time after replenishing
Visually check the radiator, hoses, reservoir cap, radiator cap, drain cock
and water pump.
If you cannot find a leak, have your Toyota dealer pressure test the cap and
check for leaks in the cooling system.
■ Coolant selection
Only use “Toyota Super Long Life Coolant” or similar high quality ethylene
glycol based non-silicate, non-amine, non-nitrite and non-borate coolant with
long-life hybrid organic acid technology.
U.S.A.: “Toyota Super Long Life Coolant” is a mixture of 50% coolant and 50% deionized water. (Enabled: -31 F [-35 C])
Canada: “Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deionized water. (Enabled: -44 F [-42 C])
For more details about engine coolant, contact your Toyota dealer.
CAUTION
■ When the engine is hot
Do not remove the radiator cap.
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.

550 4-3. Do-it-yourself maintenance
Radiator and condenserCheck the radiator and condenser and clear any foreign objects.
If either of the above parts are ex tremely dirty or you are not sure of
their condition, have your vehicl e checked by your Toyota dealer.
Brake fluid
■ Checking fluid level
The brake fluid level should be
between the MAX and MIN lines
on the reservoir.
NOTICE
■When adding engine coolant
Coolant is neither plain water nor stra ight antifreeze. The correct mixture of
water and antifreeze must be used to provide proper lubrication, corrosion
protection and cooling. Be sure to read the antifreeze or coolant label.
■ If you spill coolant
Be sure to wash it off with water to prevent damage to parts or paint.
CAUTION
■When the engine is hot
Do not touch the radiator or condenser as they may be hot and may cause
serious injuries, such as burns.

650 5-2. Steps to take in an emergency
CAUTION
■Avoiding battery fires or explosions
Observe the following precautions to prevent accidentally igniting the flam-
mable gas that may be emitted from the battery.
●Make sure the jumper cable is connected to the correct terminal and that it
is not unintentionally in contact with any part other than the intended termi-
nal.
● Do not allow a jumper cable to come into contact with both “+” and “-” ter-
minals.
● Do not smoke, use matches, cigarette lighters or allow open flame near
the battery.
■ Battery precautions
The battery contains poisonous and corrosive acidic electrolyte, while
related parts contain lead and lead compounds. Observe the following pre-
cautions when handling the battery.
●When working with the battery, always wear safety glasses and take care
not to allow any battery fluids (acid) to come into contact with skin, clothing
or the vehicle body.
● Do not lean over the battery.
● In the event that battery fluid comes into contact with the skin or eyes,
immediately wash the affected area with water and seek medical attention.
Place a wet sponge or cloth over the affected area until medical attention
can be received.
● Always wash your hands after handling the battery support, terminals, and
other battery-related parts.
● Do not allow children near the battery.
NOTICE
■When handling jumper cables
Be careful that the jumper cables do not become tangled in the cooling fan
or any of the belts when connecting or disconnecting them.

5
When trouble arises
651
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.

673
6-1. Specifications
6
Vehicle specifications
How to read oil container label:
The ILSAC (International Lubric
ant Standardization and Approval
Committee) Certification Mark is added to some oil containers to help
you select the oil you should use.
Cooling system
Capacity
4.0L V6
(1GR-FE)
engine 11.3 qt. (10.7 L, 9.4 Imp.qt.)
4.6L V8
(1UR-FE)
engine Vehicles without towing package
12.8 qt. (12.1 L, 10.6 Imp.qt.)
Vehicles with towing package
13.9 qt. (13.2 L, 11.6 Imp. qt.)
5.7L V8
(3UR-FE,
3UR-FBE)
engineVehicles without towing package
12.8 qt. (12.1 L, 10.6 Imp.qt.)
Vehicles with towing package
13.7 qt. (13.0 L, 11.4 Imp. qt.)
Coolant type Use either of the following.
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based non-silicate, non-amine, non-nitrite, and
non-borate coolant with long-life hybrid
organic acid technology
Do not use plain water alone.

732 Alphabetical index
Condenser ................................ 550
Console box ............................. 465
Cooling systemEngine overheating ............... 651
CRS ........................................... 140
Cruise control........................... 223
Cup holders .............................. 478
Curtain shield airbags ............. 122
Customizable features..... 203, 696
Daytime running light
system .................................... 213
Deck hooks ............................... 510
Defogger
Back window ......................... 317
Side mirrors ................... 315, 317
Dimensions............................... 658
Dinghy towing .......................... 294
Display Trip information ..................... 200
Warning message ................. 619
Do-it-yourself main tenance..... 538
Doors Door glasses ...........................96
Door lock ...........................46, 49
Open door warning........611, 620
Side doors ...............................49
Side mirrors .............................91
Driver’s seat belt reminder buzzer ..................................... 611
Driver’s seat belt
reminder light......................... 611
Driving Break-in tips .......................... 169
Correct posture ..................... 120
Driving assist systems........... 249
Procedures ............................ 168
Winter driving tips.................. 267
Driving position memory...........70
DVD player ................................ 399 Emergency flashers................. 600
Emergency flashers switch .... 600
Emergency, in case of
Blown fuse ............................ 577
If the engine will not start ...... 641
If the shift lever cannot be shifted ................................. 643
If the vehicle has
discharged battery .............. 647
If the warning buzzer sounds ................................ 609
If the warning light turns on........................................ 609
If the warning message
is displayed ......................... 619
If you have a flat tire ............. 623
If you lose your keys ............. 646
If you think something is wrong .............................. 607
If your vehicle becomes
stuck ................................... 654
If your vehicle has to be stopped in an emergency ... 655
If your vehicle needs to be towed ............................. 601
If your vehicle overheats ....... 651
Engine Compartment ........................ 543
Engine switch ........................ 178
Exhaust gas .......................... 174
Hood ..................................... 542
How to start the engine ................................. 178
Identification number............. 668
If the engine will not start ...... 641
Ignition switch ...................... 178
Immobilizer system ............... 115
Overheating .......................... 651
Warning light ......................... 610
Engine coolant Capacity ................................ 673
Checking ............................... 549
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