2015 TOYOTA TUNDRA radiator cap

4067-3. Do-it-yourself maintenance
Engine compartment
Washer fluid tank (P. 415)
Engine oil level dipstick ( P. 407)
Engine coolant reservoir ( P. 409)
Engine oil filler cap ( P. 408)
Brake fluid reservoir ( P. 4 11 ) Fuse box (
P. 435)
Battery ( P. 413)
Radiator ( P. 4 1 1 )
Cooling fan
Condenser ( P. 4 1 1 )
Power steering fluid reservoir ( P. 412)1
2
3
4
5
6
7
8
9
10
11

4107-3. Do-it-yourself maintenance
■Coolant selection
Only use “Toyota Super Long Life Coolant” or a 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% deion-
ized water. (Minimum temperature: -31 F [-35 C])
Canada:
“Toyota Super Long Life Coolant” is a mixture of 55% coolant and 45% deion-
ized water. (Minimum temperature: -44 F [-42 C])
For more details about coolant, contact your Toyota dealer.
■ If the coolant level drops within a short time of replenishing
Visually check the radiator, hoses, engine coolant reservoir cap, drain cock
and water pump.
If you cannot find a leak, have your Toyota dealer test the cap and check for
leaks in the cooling system.
CAUTION
■When the engine is hot
Do not remove the radiator cap.( P. 497)
The cooling system may be under pressure and may spray hot coolant if the
cap is removed, causing serious injuries, such as burns.
NOTICE
■ When adding coolant
Coolant is neither plain water nor straight 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 it from damaging parts or paint.

497
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. 8 8 )
enters the red zone or a loss of engine power is experienced. (For
example, the vehicle sp eed does not increase.)
● “ENGINE COOLANT OVERTEMP” is shown on the multi-informa-
tion display.
● Steam comes out from under the hood.
Stop the vehicle in a safe place and turn 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 sufficient ly, inspect the
hoses and radiator core
(radiator) for any leaks.
Radiator
Cooling fan
If a large amount of coolant
leaks, immediately contact your
Toyota dealer.
The coolant level is satisfac-
tory if it is between the
“FULL” and “LOW” lines on
the reservoir.Reservoir
“FULL”
“LOW”
Radiator cap
The following may indicate that your vehicle is overheating:
Correction procedures
1
2
3
1
2
4
1
2
3
4

4988-2. Steps to take in an emergency
Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.
Start the engine to check that the radiator cooling fan operates
and to check for coolant leaks from the radiator or hoses.
If the fan is not operating:
Stop the engine immediately and contact your Toyota dealer.
If the fan is operating:
Have the vehicle in spected at the nearest Toyota dealer.
5
CAUTION
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
● 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.
● Keep hands and clothing away from the fans, etc., while the engine is run-
ning.
● Do not loosen the radiator cap and the coolant reservoir cap while the
engine and radiator are hot.
High temperature steam or coolant could spray out.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cooled down sufficiently. Adding
cool coolant to a hot engine too quickly can cause damage to the engine.
■ To prevent damage to the cooling system
Observe the following precautions:
● Avoid contaminating the coolant with foreign matter (such as sand or dust,
etc.).
● Do not use any coolant additives.
6
7

571Alphabetical index
Noise from under vehicle............ 8
Odometer.................................... 90
Off-road precautions ............... 244
Oil Engine oil .............................. 512
Differential oil ........................ 515
Transfer oil ............................ 516
Opener
Hood ..................................... 405
Outer foot lights Location ................................ 353
Replacing light bulbs............. 451
Wattage ................................ 519
Outside rear view mirrors ....... 130
Adjusting and folding ............ 130
Blind spot monitor ................. 217
Mirror position memory ......... 116
Outside rear view mirror defoggers ......... 338, 345
Outside temperature
display .................................... 376
Overhead console ................... 365
Overheating.............................. 497
Parking assist sensors (intuitive parking assist) ....... 202
Parking brake ........................... 187 Operation .............................. 187
Parking brake engaged
warning buzzer ................... 465
Parking brake engaged
warning message ............... 473
Parking lights ........................... 188 Light switch ........................... 188
Replacing light bulbs..... 443, 451
Wattage ................................ 519
Pen holder ................................ 363
Personal lights ......................... 354
Light switch ........................... 354 Wattage ................................ 519
Power back window ................ 138
Power easy access system .... 116
Power outlets ........................... 377
Power steering fluid ................ 412
Power windows ....................... 134 Jam protection function ........ 135
Operation .............................. 134
Window lock switch .............. 134
Radiator .................................... 411
Radio ........................................ 267
Rear personal lights ................ 354
Rear seat Adjustment precautions ........ 115
Child seats/child restraint
system installation ................ 60
Cleaning ............................... 394
Head restraints ..................... 120
Raising the bottom cushion ............................... 114
Rear side marker lights........... 188 Light switch ........................... 188
Replacing light bulbs ............ 449
Wattage ................................ 519
Rear step bumper .................... 110
Rear turn signal lights ............ 186 Replacing light bulbs ............ 449
Turn signal lever ................... 186
Wattage ................................ 519
Rear view mirror Inside rear view mirror .......... 127
Outside rear view mirrors ..... 130
Rear view monitor system ...... 208
Refueling .................................. 195 Capacity................................ 511
Fuel types ............................. 511
Opening the fuel tank cap..... 197
N
O
P
R