2004 TOYOTA PRIUS engine coolant

269
If you are a skilled do−it−yourself
mechanic, the Toyota service manuals are
recommended. Please be aware that
do− it−yourself maintenance can affect your
warranty coverage. See “Owner ’s Warranty
Information Booklet” or “Owner ’s Manual
Supplement” for the details.
General maintenance
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 page 302 for additional informa-
tion. Coolant level
Make sure the coolant level is between
the “FULL” and “LOW” lines on the see
−
through reservoir when the hybrid system
is cold. See page 284 for additional infor-
mation.
Radiator, condenser and hoses
Check that the front of the radiator and
condenser are clean and not blocked with
leaves, dirt, or insects. See page 286 for
additional information.
Brake fluid level
Make sure the brake fluid level is correct.
See page 286 for additional information.
Engine oil level
Check the level on the dipstick with the
engine turned off and the vehicle parked
on level spot. See page 282 for additional
information.
Exhaust system
If you notice any change in the sound of
the exhaust or smell exhaust fumes, have
the cause located and corrected immedi-
ately. (See “Engine exhaust cautions” on
page 206.)

271
Tire surface and wheel nuts
Check the tires carefully for cuts,
damage or excessive wear. See Sec-
tion 8
−2 for additional information.
When checking the tires, make sure
no nuts are missing, and check the
nuts for looseness. Tighten them if
necessary.
Tire rotation
Rotate the tires according to the
maintenance schedule. (For sched-
uled maintenance information, please
refer to the “Scheduled Maintenance
Guide” or “Owner ’s Manual Supple-
ment”.) See page 293 for additional
information.
Be on the alert for changes in perfor-
mance, sounds, and visual tip −offs that
indicate service is needed. Some impor-
tant clues are as follows:
Engine missing, stumbling, or pinging
Appreciable loss of power
Strange engine noises
A fluid leak under the vehicle (however,
water dripping from the air conditioning
after use is normal.)
Change in exhaust sound (This may
indicate a dangerous carbon monoxide
leak. Drive with the windows open and
have the exhaust system checked im-
mediately.)
Flat −looking tire; excessive tire squeal
when cornering; uneven tire wear
Vehicle pulls to one side when driving
straight on a level road
Strange noises related to suspension
movement
Loss of brake effectiveness; spongy
feeling brake pedal; pedal almost
touches floor; vehicle pulls to one side
when braking
Coolant temperature continually higher
than normal If you notice any of these clues, take your
vehicle to your Toyota dealer as soon as
possible. It probably needs adjustment or
repair.
CAUTION
Do not continue driving with the ve-
hicle unchecked. It could result in se-
rious vehicle damage and possibly
personal injury.
Does your vehicle need
repairing?

274
Engine compartment overview
1. Windshield washer fluid tank
2. Brake fluid reservoir
3. Engine oil filler cap
4. Engine coolant reservoir
5. Inverter reservoir tank
6. Fuse block
7. Radiator and condenser
8. Engine oil level dipstick
9. Auxiliary battery
81p001g

277
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 you spill the fluid, be sure to
wash it off with water to prevent it
from damaging the 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.

279
Parts and tools
Here is a list of parts and tools you will
need to perform do−it−yourself mainte-
nance. Remember all Toyota parts are de-
signed in metric sizes, so your tools must
be metric.
CHECKING THE ENGINE OIL LEVEL
Parts (if level is low):
Engine oil API grade SL “Energy −Con-
serving” or ILSAC multigrade having
viscosity proper for your climate
Tools:
Rag or paper towel
Funnel (only for adding oil)
CHECKING THE COOLANT LEVEL
Parts (if level is low):
“Toyota Super Long Life Coolant” or
similar high quality ethylene glycol
based non− silicate, non −amine, non− ni-
trite, and non −borate coolant with long −
life hybrid organic acid technology.
“Toyota Super Long Life Coolant” is a
mixture of 50% coolant and 50% deion-
ized water (for the U.S.A.) or 55%
coolant and 45% deionized water (for
Canada).
Tools:
Funnel (only for adding coolant) CHECKING BRAKE FLUID
Parts (if level is low):
SAE J1703 or FMVSS No.116 DOT 3
brake fluid
Tools:
Rag or paper towel
Funnel (only for adding fluid)
CHECKING AUXILIARY BATTERY CON-
DITION
Tools:
Warm water
Baking soda
Grease
Conventional wrench (for terminal
clamp bolts)
CHECKING AND REPLACING FUSES
Parts (if replacement is necessary):
Fuse with same amperage rating as
original
ADDING WASHER FLUID
Parts:
Water
Washer fluid containing antifreeze (for
winter use) Tools:
Funnel
REPLACING LIGHT BULBS
Parts:
Bulb with same number and wattage
rating as original (See charts in “Re-
placing light bulbs–” on page 302.)
Tools:
Screwdriver

281
DOITYOURSELF MAINTENANCE
Engine and Chassis
Checking the engine oil level282
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the coolant level 284
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking the radiator and condenser 286
. . . . . . . . . . . . . . . . . . . . . . . . .
Checking brake fluid 286
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . .
Checking and replacing the air conditioning filter 287
. . . . . . . . . . . . . . .
Checking tire inflation pressure 289
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking and replacing tires 291
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rotating tires 293
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . . . . . .
Installing snow tires and chains 294
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacing wheels 295
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . . . . .
Aluminum wheel precautions 296
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 8– 2

284
Oil identification marks
Either or both API registered marks are
added to some oil containers to help
you select the oil you should use.
The API Service Symbol is located any-
where on the outside of the container.
The top portion of the label shows the oil
quality by API (American Petroleum Insti-
tute) designations such as SL. The center
portion of the label shows the SAE viscos-
ity grade such as SAE 5W−30. “Energy −
Conserving” shown in the lower portion,
indicates that the oil has fuel −saving ca-
pabilities.
The ILSAC (International Lubricant Stan-
dardization and Approval Committee) Certi-
fication Mark is displayed on the front of
the container.
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”.
CAUTION
The coolant heat storage tank reaches
high temperature inside. It is danger-
ous if hot coolant is discharged when
replacing. For replacement of the
coolant, contact your Toyota dealer.
Look at the seethrough coolant reser-
voir when the hybrid system is cold.
The coolant level is satisfactory if it is
between the “FULL” and “LOW” lines
on the reservoir. If the level is low, add
the coolant. (For the coolant type, see
“Coolant type selection” described be-
low.)
The coolant level in the reservoir will vary
with hybrid system temperature. However,
if the level is on or below the “LOW” line,
add coolant. Bring the level up to the
“FULL” 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.
Checking the coolant level

312
ENGINE LUBRICATION
Oil capacity (drain and refill), L (qt., lmp.
qt.):With filter 3.7 (3.9, 3.3)
Without filter 3.4 (3.6, 3.0)
“Toyota Genuine Motor Oil” is used in your
Toyota vehicle. Use Toyota approved “Toyota
Genuine Motor Oil” or equivalent to satisfy the
following grade and viscosity.
Oil grade: API grade SL “Energy −Conserving” or
ILSAC multigrade engine oil. Recommended oil viscosity:
SAE 5W
−30
oil008
Outside temperature
Please contact your Toyota dealer for further
details. COOLING SYSTEM
Total capacity, L (qt., Imp. qt.):
For gasoline engine 8.6 (9.0, 7.5)
For electric motor
and inverter and
converter 2.7 (2.9, 2.4)
Coolant type: “Toyota Super Long Life Coolant” is
used in your Toyota vehicle at factory
fill. In order to avoid technical prob-
lems, only use “Toyota Super Long Life
Coolant” or similar high quality ethyl-
ene 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 or-
ganic acids.)
Do not use plain water alone.
Please contact your Toyota dealer for
further details.