2006 TOYOTA TUNDRA radiator cap

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If your engine coolant temperature
gauge indicates overheating, if you ex-
perience a loss of power, or if you hear
a loud knocking or pinging noise, the
engine has probably overheated. You
should follow this procedure...
1. Pull safely off the road, stop the ve- hicle and turn on your emergency
flashers. Put the transmission in “P”
(automatic) or neutral (manual) and ap-
ply the parking brake. Turn off the air
conditioning if it is being used.
2. If coolant or steam is boiling out of the radiator or reservoir, stop the engine.
Wait until the steam subsides before
opening the hood. If there is no coolant
boiling over or steam, leave the engine
running.
CAUTION
To help avoid personal injury, keep
the hood closed until there is no
steam. Escaping steam or coolant is
a sign of very high pressure.
3. Visually check to see if the enginedrive belt (fan belt) is broken or loose.
Look for obvious coolant leaks from the
radiator, hoses, and under the vehicle.
However, note that water draining from
the air conditioning is normal if it has
been used.
CAUTION
When the engine is running, keep
hands and clothing away from the
moving fan and engine drive belts.
4. If the engine drive belt is broken or thecoolant is leaking, stop the engine im-
mediately. Call a Toyota dealer for as-
sistance.
5. If the engine drive belt is O.K. and there are no obvious leaks, you may
help the engine cool down more quickly
by running it at about 1500 rpm for a
few minutes with the accelerator pedal
lightly depressed.
6. Check the coolant reservoir. If it is dry, add coolant to the reservoir while the
engine is running. Fill it about half full.
For the coolant type, see “Coolant type
selection” in Section 7 −2.
CAUTION
Do not attempt to remove the radiator
cap when the engine and radiator are
hot. Serious injury could result from
scalding hot fluid and steam blown
out under pressure.
7. After the engine coolant temperature
has cooled to normal, again check the
coolant level in the reservoir. If neces-
sary, bring it up to half full again. Seri-
ous coolant loss indicates a leak in the
system. You s hould have it checked as
soon as possible at your Toyota dealer.
If your vehicle overheats

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2006 TUNDRA from Oct. ’06 Prod. (OM 34458U)
1. Power steering fluid reservoir
2. Engine oil level dipstick
3. Engine oil filler cap
4. Brake fluid reservoir
5. Fuse block
6. Battery
7. Engine coolant reservoir
8. Radiator
9. Condenser
10. Windshield washer fluid tank
Engine compartment overview
 4.0 L V6 (1GRFE) engine

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2006 TUNDRA from Oct. ’06 Prod. (OM 34458U)
1. Power steering fluid reservoir
2. Engine oil level dipstick
3. Engine oil filler cap
4. Brake fluid reservoir
5. Fuse blocks
6. Battery
7. Engine coolant reservoir
8. Radiator
9. Condenser
10. Windshield washer fluid tank

4.7 L V8 (2UZFE) engine

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2006 TUNDRA from Oct. ’06 Prod. (OM 34458U)
CAUTION
When the engine is running, keep
hands, clothing, and tools away
from the moving fan and engine
drive belts. (Removing rings,
watches, and ties is advisable.)
Right after driving, the engine
compartment—the engine, radiator,
exhaust manifold, power steering
fluid reservoir and spark plug
boots, etc.—will be hot. So be care-
ful not to touch them. Oil, fluids
and spark plugs may also be hot.
If the engine is hot, do not remove
the radiator cap or loosen the drain
plugs to prevent burning yourself.
Do not leave anything that may
burn easily, such as paper or rags,
in the engine compartment.
Do not smoke, cause sparks or al-
low open flames around fuel or the
battery. Their fumes are flammable.
Do not get under your vehicle with
just the body jack supporting it. Al-
ways use automotive jack stands or
other solid supports.
Use eye protection whenever you
work on or under your vehicle
where you may be exposed to flying
or falling material, fluid spray, etc.
Used engine oil contains potentially
harmful contaminants which may
cause skin disorders such as in-
flammation or skin cancer, so care
should be taken to avoid prolonged
and repeated contact with it. To re-
move used engine oil from your
skin, wash thoroughly with soap
and water.
Do not leave used oil within the
reach of children.
Dispose of used oil and filter only
in a safe and acceptable manner.
Do not dispose of used oil and fil-
ter in household trash, in sewers or
onto the ground. Call your dealer or
a service station for information
concerning recycling or disposal.
Be extremely cautious when work-
ing on the battery. It contains poi-
sonous and corrosive sulfuric acid.
NOTICE
Remember that battery and ignition
cables carry high currents or volt-
ages. Be careful of accidentally
causing a short circuit.
 Add only “Toyota Super Long Life
Coolant” or similar high quality eth-
ylene glycol based nonsilicate,
nonamine, nonnitrite, and nonbo-
rate coolant with longlife hybrid
organic acid technology to fill the
radiator. “Toyota Super Long Life
Coolant” is a mixture of 50% cool-
ant and 50% deionized water (for
the U.S.A.) or 55% coolant and 45%
deionized water (for Canada).
 If you spill some of the coolant, be
sure to wash it off with water to
prevent it from damaging the parts
or paint.
 Do not allow dirt or anything else
to fall through the spark plug holes.
 Do not pry the outer electrode of a
spark plug against the center elec-
trode.

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To ensure excellent lubrication perfor-
mance for your engine, “Toyota Genuine
Motor Oil” is available, which has been
specifically tested and approved for all
Toyota engines.
Please contact your Toyota dealer for fur-
ther details about “Toyota Genuine Motor
Oil”. Look at the seethrough coolant reser-
voir when the engine is cold. The cool-
ant level is satisfactory if it is between
the “F” and “L” lines on the reservoir.
If the level is low, add the coolant. (For
the coolant type, see “Coolant type
selection” described below.)
The coolant level in the reservoir will vary
with engine temperature. However, if the
level is on or below the “L” line, add
coolant. Bring the level up to the “F” line.
If the coolant level drops within a short
time after replenishing, there may be a
leak in the system. Visually check the
radiator, hoses, radiator cap and drain
cock and water pump.
If you can find no leak, have your Toyota
dealer test the cap pressure and check
for leaks in the cooling system.
CAUTION
To prevent burning yourself, do not
remove the radiator cap when the en-
gine is hot.
Coolant type selection
Use of improper coolants may damage
your engine cooling system.
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. (Coolant
with long −life hybrid organic acid
technology is a combination of low
phosphates and organic acids.)
For the U.S.A.—“Toyota Super Long Life
Coolant” is a mixture of 50% coolant and
50% deionized water. This coolant pro-
vides protection down to about −35 C
( − 31 F).
For the Canada—“Toyota Super Long Life
Coolant” is a mixture of 55% coolant and
45% deionized water. This coolant pro-
vides protection down to about −42 C
( − 44 F).
NOTICE
Do not use plain water alone.
Checking the engine coolant
level

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A
“AUTO LSD” system 201
. . . . . . . . . . . . . . . . . .
Access doors 24
. . . . . . . . . . . . . . . . . . . . . . . . .
Adding washer fluid 469
. . . . . . . . . . . . . . . . . .
Adjustment
Front seats 54,55
. . . . . . . . . . . . . . . . . . . . . .
Seat belt 63
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Air conditioning system 306
. . . . . . . . . . . . . . .
Airbags 75,85,92,102,108
. . . . . . . . . . . . . . . .
Aluminum wheel precautions 464
. . . . . . . . . .
Anti −glare inside rear view mirror 156 . . . . . .
Anti −lock brake system
warning light 178
. . . . . . . . . . . . . . . . . . . . . . .
Anti −theft steering column lock 190 . . . . . . . .
Appearance care
Cleaning the interior 431
. . . . . . . . . . . . . . . .
Protecting your Toyota from corrosion 428
. . . . . . . . . . . . . . . . . . .
Washing and waxing 429
. . . . . . . . . . . . . . . .
Armrest 62
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ashtray 327
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio system 218,242
. . . . . . . . . . . . . . . . . . . .
Audio/video system 251
. . . . . . . . . . . . . . . . . .
Audio/video system operating tips 299 . . . . . .
Automatic transmission
Driving with an automatic transmission 191
. . . . . . . . . . . . . . . . . . . . .
Shift pattern 191
. . . . . . . . . . . . . . . . . . . . . . .
Shifting speed 191
. . . . . . . . . . . . . . . . . . . . .
Automatic transmission fluid temperature warning light 178
. . . . . . . . . . .
Auxiliary boxes 335
. . . . . . . . . . . . . . . . . . . . . .
Auxiliary catch, Engine hood 42
. . . . . . . . . . .
B
Back window 38
. . . . . . . . . . . . . . . . . . . . . . . . .
Back window and outside rear view mirror defogger switch 171
. . . . . . . . .
Battery
Checking battery condition 466
. . . . . . . . . .
Gas caution 466
. . . . . . . . . . . . . . . . . . . . . . .
Handling safety 466
. . . . . . . . . . . . . . . . . . . .
Recharging precautions 467
. . . . . . . . . . . . .
Winter driving tips 386
. . . . . . . . . . . . . . . . . .
Before starting the engine 382
. . . . . . . . . . . . .
Brake pad wear limit indicators 364 . . . . . . . .
Brake system 358
. . . . . . . . . . . . . . . . . . . . . . . .
Brake system warning light and buzzer 178
. . . . . . . . . . . . . . . . . . . .
Brakes
Fluid level 453,454
. . . . . . . . . . . . . . . . . . . . .
Pad wear limit indicators 364
. . . . . . . . . . . .
Parking 213
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Break −in tips 351
. . . . . . . . . . . . . . . . . . . . . . . .
Brightness control 164
. . . . . . . . . . . . . . . . . . . .
C
Carbon monoxide caution 355
. . . . . . . . . . . . .
Cargo and luggage
Capacity 376
. . . . . . . . . . . . . . . . . . . . . . . . . .
Capacity and distribution 377
. . . . . . . . . . . .
Stowage precautions 377
. . . . . . . . . . . . . . .
Cargo lamp 168
. . . . . . . . . . . . . . . . . . . . . . . . . .
Cargo net hooks 346
. . . . . . . . . . . . . . . . . . . . .
Cassette player 218
. . . . . . . . . . . . . . . . . . . . . .
Cassette tape holder 342
. . . . . . . . . . . . . . . . .
Center vents 313
. . . . . . . . . . . . . . . . . . . . . . . . . Certification label
365
. . . . . . . . . . . . . . . . . . . .
Charging system warning light 178
. . . . . . . . .
Checking and replacing fuses 468
. . . . . . . . .
Checking brake fluid 453,454
. . . . . . . . . . . . . .
Checking the engine oil level 450
. . . . . . . . . .
Checking the radiator and condenser 453
. . . . . . . . . . . . . . . . . . . . . . . . .
Child restraint
Child restraint system 117
. . . . . . . . . . . . . .
Installation 119,128
. . . . . . . . . . . . . . . . . . . .
Installation with child restraint lower anchorages 146,148,150 . . . . . . . .
Precautions 115
. . . . . . . . . . . . . . . . . . . . . . .
Types of child restraint system 118 . . . . . . .
Using a top strap 138,140,144
. . . . . . . . . . .
Cigarette lighter 327
. . . . . . . . . . . . . . . . . . . . . .
Cleaning the interior 431
. . . . . . . . . . . . . . . . . .
Clock 327
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coin holder 338,339,340
. . . . . . . . . . . . . . . . . .
Cold weather
Operation 386
. . . . . . . . . . . . . . . . . . . . . . . . .
Compact disc and cassette tape holder
Cassette tape holder 341,342
. . . . . . . . . . .
Compact disc holder 341,342
. . . . . . . . . . . .
Compact disc changer 218
. . . . . . . . . . . . . . . .
Compact disc changer controller 218 . . . . . . .
Compact disc player 218
. . . . . . . . . . . . . . . . . .
Compass 323
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condenser
Checking the condenser 453
. . . . . . . . . . . .
Console box
Rear 336,337
. . . . . . . . . . . . . . . . . . . . . . . . . .
Controls, Instrument panel 2,7,11
. . . . . . . . . .

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2006 TUNDRA from Oct. ’06 Prod. (OM 34458U)
Cooling system
Coolant level 452 . . . . . . . . . . . . . . . . . . . . . .
Engine overheating 407 . . . . . . . . . . . . . . . . .
Radiator and reservoir 452 . . . . . . . . . . . . . .
Radiator cap 407 . . . . . . . . . . . . . . . . . . . . . . .
Winter driving tips 386 . . . . . . . . . . . . . . . . . .
Corrosion prevention 428 . . . . . . . . . . . . . . . . .
Cranking hold function 382 . . . . . . . . . . . . . . . .
Cruise control 214 . . . . . . . . . . . . . . . . . . . . . . .
Cup holders 343 . . . . . . . . . . . . . . . . . . . . . . . . .
D
Defogger
Back window 171 . . . . . . . . . . . . . . . . . . . . . .
Outside rear view mirror 171 . . . . . . . . . . . .
Differential, Limited slip 365 . . . . . . . . . . . . . . .
Dimmer switch, Headlight 162 . . . . . . . . . . . . .
Dinghy towing 387 . . . . . . . . . . . . . . . . . . . . . . .
Directional signals 162 . . . . . . . . . . . . . . . . . . .
Do −it−yourself maintenance
Parts and tools 447 . . . . . . . . . . . . . . . . . . . . .
Service precautions 445 . . . . . . . . . . . . . . . .
Does your vehicle need repairing? 439 . . . . .
Doors
Access door 24 . . . . . . . . . . . . . . . . . . . . . . . .
Front door 20 . . . . . . . . . . . . . . . . . . . . . . . . . .
Side doors 21 . . . . . . . . . . . . . . . . . . . . . . . . .
Driver ’s seat belt reminder buzzer 178 . . . . . .
Driver ’s seat belt reminder light 178 . . . . . . . .
Driving
Automatic transmission 191 . . . . . . . . . . . . .
Driving tips 382 . . . . . . . . . . . . . . . . . . . . . . . .
Manual transmission 195 . . . . . . . . . . . . . . . Driving tips
Driving tips in various conditions 383 . . . . .
Driving with a manual transmission 195 . . . . . . . . . . . . . . . . . . . . .
Driving with an automatic transmission 191 . . . . . . . . . . . . . . . . . . . . .
Economical driving 399 . . . . . . . . . . . . . . . . .
Good driving practice 191,195 . . . . . . . . . . .
Winter driving tips 386 . . . . . . . . . . . . . . . . . .
During
Break −in 351 . . . . . . . . . . . . . . . . . . . . . . . . . .
DVD player 251 . . . . . . . . . . . . . . . . . . . . . . . . . . E
Economical driving
Saving money on both fuel and repairs 399 . . . . . . . . . . . . . . . . . .
Electric moon roof 48 . . . . . . . . . . . . . . . . . . . . .
Electrical system
Battery 466,467 . . . . . . . . . . . . . . . . . . . . . . . .
Fuse locations 444 . . . . . . . . . . . . . . . . . . . . .
Fuses 468 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emergency flasher switch 163 . . . . . . . . . . . . .
Emergency, In case of
Blown fuse 468 . . . . . . . . . . . . . . . . . . . . . . . .
Emergency flasher switch 163 . . . . . . . . . . .
Flat tire 408 . . . . . . . . . . . . . . . . . . . . . . . . . . .
If you cannot increase engine speed 406 . . . . . . . . . . . . . . . . . . . .
If you lose your keys 426 . . . . . . . . . . . . . . . .
If you lose your wireless remote control transmitter 426 . . . . . . . . . . . . . . . . If your engine stalls while driving 406
. . . . .
If your vehicle becomes stuck 420 . . . . . . .
If your vehicle needs to be towed 420 . . . . .
If your vehicle will not start 402
. . . . . . . . . .
Jump starting 403
. . . . . . . . . . . . . . . . . . . . . .
Overheating 407
. . . . . . . . . . . . . . . . . . . . . . .
Towing 420
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emissions Inspection and Maintenance (I/M) programs 440
. . . . . . . . .
Engine
Before starting the engine 382
. . . . . . . . . . .
Checking the coolant level 452
. . . . . . . . . .
Emission control device 354
. . . . . . . . . . . . .
Engine compartment 442
. . . . . . . . . . . . . . .
Exhaust gas caution 355
. . . . . . . . . . . . . . . .
Hood release 42
. . . . . . . . . . . . . . . . . . . . . . .
Identification number 366
. . . . . . . . . . . . . . .
Oil consumption 356
. . . . . . . . . . . . . . . . . . . .
Oil level 450
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil pressure gauge 175
. . . . . . . . . . . . . . . . .
Overheating 407
. . . . . . . . . . . . . . . . . . . . . . .
Starting procedure 382
. . . . . . . . . . . . . . . . .
Three −way catalytic converters 354 . . . . . .
Engine coolant
Temperature gauge 174
. . . . . . . . . . . . . . . . .
Winter driving tips 386
. . . . . . . . . . . . . . . . . .
Engine coolant temperature gauge 174 . . . . .
Engine immobilizer system 19
. . . . . . . . . . . . .
Engine oil
Winter driving tips 386
. . . . . . . . . . . . . . . . . .
Engine oil pressure gauge 175
. . . . . . . . . . . . .
Engine oil replacement reminder light 178
. . . . . . . . . . . . . . . . . . . . . .
Exhaust gas caution 355
. . . . . . . . . . . . . . . . . .

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2006 TUNDRA from Oct. ’06 Prod. (OM 34458U)
Outside temperature display 322
. . . . . . . . . . .
Overdrive switch 191
. . . . . . . . . . . . . . . . . . . . .
Overheating, Engine 407
. . . . . . . . . . . . . . . . . .
Overheating, Engine coolant 174
. . . . . . . . . .
Overview
Engine compartment 442
. . . . . . . . . . . . . . .
P
Parking brake
Operation 213 . . . . . . . . . . . . . . . . . . . . . . . . .
Reminder light 213 . . . . . . . . . . . . . . . . . . . . .
Passenger airbag off switch 84 . . . . . . . . . . . .
Polishing 429 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power back window 39 . . . . . . . . . . . . . . . . . . .
Power outlet 328,329 . . . . . . . . . . . . . . . . . . . . .
Power rear view mirror control 155 . . . . . . . . .
Power steering
Fluid level 455 . . . . . . . . . . . . . . . . . . . . . . . . .
Power window switches 35 . . . . . . . . . . . . . . . .
Preloaders (seat belt pretensioners) 71 . . . . .
Pretensioners
(seat belt pretensioners) 71 . . . . . . . . . . . . .
Protecting your Toyota from corrosion 428 . . . . . . . . . . . . . . . . . . . . .
R
Radiator
Checking the radiator 453 . . . . . . . . . . . . . . .
Coolant, Engine 452 . . . . . . . . . . . . . . . . . . . .
Radio 218 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rear audio system
Rear seat audio system 242 . . . . . . . . . . . . .
Rear audio/video system
Rear seat entertainment system 251 . . . . .
Rear console box 336,337 . . . . . . . . . . . . . . . .
Rear side windows 38 . . . . . . . . . . . . . . . . . . . .
Rear step bumper 364 . . . . . . . . . . . . . . . . . . . .
Rear vents 313 . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear view mirror
Anti −glare inside 156 . . . . . . . . . . . . . . . . . . .
Rear view mirror, auto anti −glare inside 157 . . . . . . . . . . . . . . .
Rear view mirrors
Folding 156 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outside 154 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power 155 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote controls 240 . . . . . . . . . . . . . . . . . . . . .
Reporting safety defects
for U.S. owners 498 . . . . . . . . . . . . . . . . . . . .
Roll sensing of curtain shield airbags off switch 114 . . . . . . . . . . . . . . . . . .
S
Seat adjustment precautions
Front seats 53 . . . . . . . . . . . . . . . . . . . . . . . . .
Seat belt extender 69 . . . . . . . . . . . . . . . . . . . . .
Seat belts
Cleaning 431 . . . . . . . . . . . . . . . . . . . . . . . . . .
Fastening 63 . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat belt precautions 63 . . . . . . . . . . . . . . . .
Seat belt pretensioners 71 . . . . . . . . . . . . . .
Seat heater switches 62 . . . . . . . . . . . . . . . . . .
Seating capacity 376 . . . . . . . . . . . . . . . . . . . . . Seats 52
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Security system 42 . . . . . . . . . . . . . . . . . . . . . . .
Service and maintenance 436 . . . . . . . . . . . . .
Service reminder indicator 178 . . . . . . . . . . . .
Side door locks 21 . . . . . . . . . . . . . . . . . . . . . . .
Side doors 21 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side steps 365 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Side vents 313 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spare fuse 468 . . . . . . . . . . . . . . . . . . . . . . . . . .
Spare tire 409,410 . . . . . . . . . . . . . . . . . . . . . . .
Spark plugs
Iridium −tipped spark plugs 357 . . . . . . . . . .
Specifications 480 . . . . . . . . . . . . . . . . . . . . . . .
SRS driver airbag and front passenger airbag 75,85 . . . . . . . . . . . .
SRS side airbags and curtain shield airbags 92 . . . . . . . . . . . . . . . .
SRS warning light 178 . . . . . . . . . . . . . . . . . . . .
Starting
Cold weather 382 . . . . . . . . . . . . . . . . . . . . . .
Engine 382 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump starting 403 . . . . . . . . . . . . . . . . . . . . . .
Steering
Tilt steering wheel 154 . . . . . . . . . . . . . . . . . .
Steering column
Column lock 190 . . . . . . . . . . . . . . . . . . . . . . .
StepSide bed 365 . . . . . . . . . . . . . . . . . . . . . . . .
Sun visors 158 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension and chassis 367 . . . . . . . . . . . . . .
Swing −up rear seats 58 . . . . . . . . . . . . . . . . . . .
Switch
Back window defogger 171 . . . . . . . . . . . . . .
Emergency flasher 163 . . . . . . . . . . . . . . . . .
Headlight, dimmer and turn signal 162 . . . .
Ignition 190 . . . . . . . . . . . . . . . . . . . . . . . . . . .