2006 TOYOTA PRIUS Spark plug

317
INFORMATION BEFORE DRIVING YOUR
TOYOTA
Break−in period 318
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Fuel 318
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Fuel pump shut −off systemm 320
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Operation in foreign countries 320
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Three −way catalytic converters 321
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Engine exhaust cautions 322
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Facts about engine oil consumption 322
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Coolant heat storage system 324
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Iridium −tipped spark plugs 324
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Brake system 325
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Electric power steering system 329
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Brake pad wear limit indicators 329
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Your Toyota’s identification 330
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Theft prevention labels 331
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Suspension and chassis 331
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Tire information 332
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Vehicle load limits 342
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Cargo and luggage 342
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Types of tires 345
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SECTION 3

324
30p103
Electric water pumpCoolant heat storage
tank
Coolant flow control
valve
The coolant heat storage tank system
stores hot coolant and feeds it via the
electric water pump automatically to warm
the engine as required. This system helps
generate clean emissions. To confirm the
coolant heat storage system check, the
pump may operate automatically with the
vehicle stopped (in the “IG −OFF” mode).
Although the pump may operate and
cause noise while the vehicle is stopped,
this does not indicate a malfunction.
CAUTION
The coolant in this tank is hot even
if the engine and radiator are cold.
For replacement of the coolant,
contact your Toyota dealer.
Do not touch bolts (9 pieces)
painted in yellow.
In case the bolts are loosened,
there is a risk of hot coolant com-
ing out from inside the tank.
When this has any malfunction, the
surface of this tank gets hot. To
prevent burning yourself, do not
touch the tank.
INFORMATION
In such cases as the time of engine
starting and a short trip after the
engine is stopped, the electric water
pump will work for a moment, but
this is no problem.
This is for the preparation for good
emission.
Your engine is fitted with iridiumtipped
spark plugs.
NOTICE
Use only iridiumtipped spark plugs.
Do not adjust gaps for engine perfor-
mance or smooth drivability.
Coolant heat storage system Iridiumtipped spark plugs

394
If you perform maintenance by yourself,
be sure to follow the correct procedure
given in this Section.
You should be aware that improper or in-
complete servicing may result in operating
problems.
Performing do−it−yourself maintenance
during the warranty period may affect your
warranty coverage. Read the separate
Toyota Warranty statement for details and
suggestions.
This Section gives instructions only for
those items that are relatively easy for an
owner to perform. As explained in Section
7, there are still a number of items that
must be done by a qualified technician
with special tools.
For information on tools and parts for do −
it −yourself maintenance, see “Parts and
tools” on page 397.
Utmost care should be taken when work-
ing on your vehicle to prevent accidental
injury. Here are a few precautions that
you should be especially careful to ob-
serve:CAUTION
When the hybrid system is on, 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 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 hybrid system 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
batteries. Their fumes are flam-
mable.
When the hybrid system is operat-
ing with the “READY” light on, the
engine is automatically started in
some case. When you inspect the
engine compartment, be sure to
press the “POWER” switch to the
“OFF” mode.
Do not get under your vehicle with
just the body jack supporting it. Al-
ways use automotive jack stands or
other solid supports.
Be sure that the hybrid system is
in the “OFF” mode if you work near
the electric cooling fans or radiator
grille. With the ignition on, the
electric cooling fans will automati-
cally start to run if the engine cool-
ant temperature is high and/or the
air conditioning is on.
Use eye protection whenever you
work on or under your vehicle
where you may be exposed to fly-
ing or falling material, fluid spray,
etc.
Be extremely cautious when work-
ing on the batteries. It contains poi-
sonous and corrosive sulfuric acid
or strong alkali.
Doityourself service
precautions

395
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
for information concerning recycling
or disposal.
Take care when filling the brake
fluid reservoir because brake fluid
can harm your eyes and damage
painted surfaces. If fluid gets in
your eyes, flush your eyes with
clean water immediately. If you still
feel uncomfortable with your eyes,
go to the doctor.
When servicing the vehicle with the
smart entry and start system, be
sure to keep the smart key away
from the vehicle. If the key is left
in the vehicle, the hybrid system
may start by pressing the “POWER”
switch with the brake pedal de-
pressed.
NOTICE
Remember that batteries and igni-
tion cable carry high currents or
voltages. 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
spark plug against the center elec-
trode.
 Use only spark plugs of the speci-
fied type. Using other types will
cause engine damage, loss of per-
formance or radio noise.
 If the brake fluid is spilled on the
vehicle, be sure to wash it off with
water to prevent it damage to parts
or paint.
 Do not drive with the air cleaner
filter removed, or excessive engine
wear could result. Also backfiring
could cause a fire in the engine
compartment.
 Be careful not to scratch the glass
surface with the wiper frame.
 When closing the hood, check to
see that you have not forgotten any
tools, rags, etc.

427
Fuel type:Unleaded gasoline, Octane Rating 87
(Research Octane Number 91) or
higher
Fuel tank capacity, L (gal., lmp.gal.): 45 (11.9, 9.9)
Hybrid battery
Type: Nickel −Metal hydride battery
Voltage: 7.2 V
Capacity: 6.5 Ah (3HR)
Quantity: 28
Overall voltage: 201.6 V
Service specifications
ENGINE
Valve clearance (engine cold), mm (in.): Intake 0.17 − 0.23 (0.007 − 0.009)
Exhaust 0.27 − 0.33 (0.011 − 0.013)
Spark plug type: DENSO SK16R11
NGK IFR5A11
Spark plug gap, mm (in.): 1.1 (0.043)
Fuel