2006 TOYOTA TUNDRA coolant reservoir

’06 TUNDRA_U (L/O 0508)
407
2006 TUNDRA from Oct. ’06 Prod. (OM 34458U)
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

’06 TUNDRA_U (L/O 0508)
437
2006 TUNDRA from Oct. ’06 Prod. (OM 34458U)
What about doityourself maintenance?
Many of the maintenance items are easy
to do yourself if you have a little mechani-
cal ability and a few basic automotive
tools. Simple instructions for how to per-
form them are presented in Section 7.
If you are a skilled do−it−yourself mechan-
ic, the Toyota service manuals are recom-
mended. Please be aware that do −it−your-
self maintenance can affect your warranty
coverage. See “Owner ’s Warranty Informa-
tion Booklet” or “Owner ’s Manual Supple-
ment” for the details. Listed below are the general maintenance
items that should be performed as fre-
quently as specified. In addition to check-
ing the items listed, if you notice any
unusual noise, smell or vibration, you
should investigate the cause or take your
vehicle to your Toyota dealer or a quali-
fied service shop immediately. It is recom-
mended that any problem you notice be
brought to the attention of your dealer or
the qualified service shop for their advice.
CAUTION
Make these checks only with ade-
quate ventilation if you run the en-
gine.
IN THE ENGINE COMPARTMENT
Items listed below should be checked
from time to time, e.g. each time when
refueling.
Washer fluid
Make sure there is sufficient fluid in the
tank. See Section 7
−3 for additional in-
formation. Engine coolant level
Make sure the coolant level is between
the “F” and “L” lines on the see
−through
reservoir when the engine is cold. See
Section 7 −2 for additional information.
Radiator, condenser and hoses
Check that the front of the radiator and
condenser are clean and not blocked with
leaves, dirt, or insects. See Section 7 −2
for additional information.
Battery condition
Check the battery condition by the indica-
tor color. See Section 7 −3 for additional
information.
Brake fluid level
Make sure the brake fluid level is correct.
See Section 7 −2 for additional information.
Engine oil level
Check the level on the dipstick with the
engine turned off and the vehicle parked
on a level spot. See Section 7 −2 for addi-
tional information.
General maintenance

’06 TUNDRA_U (L/O 0508)
442
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

’06 TUNDRA_U (L/O 0508)
443
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

’06 TUNDRA_U (L/O 0508)
446
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.

’06 TUNDRA_U (L/O 0508)
452
2006 TUNDRA from Oct. ’06 Prod. (OM 34458U)
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

’06 TUNDRA_U (L/O 0508)
453
2006 TUNDRA from Oct. ’06 Prod. (OM 34458U)
Toyota recommends “Toyota Super Long
Life Coolant”, which has been tested to
ensure that it will not cause corrosion nor
result in malfunction of your engine
coolant system with proper usage. “Toyota
Super Long Life Coolant” is formulated
with long−life hybrid organic acid
technology and has been specifically
designed to avoid engine cooling system
malfunction on Toyota vehicles.
Please contact your Toyota dealer for
further details. If any of the above parts are extremely
dirty or you are not sure of their condi-
tion, take your vehicle to a Toyota dealer.
CAUTION
To prevent burning yourself, be care-
ful not to touch the radiator or con-
denser when the engine is hot.
NOTICE
To prevent damage to the radiator
and condenser, do not perform the
work by yourself.
To check the fluid level, simply look at
the seethrough reservoir. The level
should be between the “MAX” and
“MIN” lines on the reservoir.
It is normal for the brake fluid level to go
down slightly as the brake pads wear. So
be sure to keep the reservoir filled.
If the reservoir needs frequent refi
lling, it
may indicate a serious mechanical prob-
lem.
Checking the radiator and
condenser Checking brake fluid
(without vehicl
es stability
control system)

’06 TUNDRA_U (L/O 0508)
506
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
. . . . . . . . . . . . . . . . . .