2003 TOYOTA PRIUS engine

109
Hybrid driving
This vehicle runs in combination with the
gasoline engine and electric motor.
If the “READY” light is on, you can start
your vehicle even with the gasoline engine
stopped.
When the hybrid vehicle battery tempera-
ture is low or high, or the hybrid vehicle
battery capacity is decreased with the run-
ning mode selector lever at “R” during
driving, the output control warning light is
on and the output power may be limited.
If the output control warning light is on,
drive your vehicle without hard accelera-
tion. The output power will be limited par-
ticularly when backing up.
(g) If you cannot shift lever out of “P”position
If you cannot shift the selector lever from
the “P” position even though the brake
pedal is depressed, use the shift lock
override button. For instructions, see “If
you cannot shift running mode selector
lever” on page 188 in Section 5.
25p008
Vehicles sold in U.S.A.
25p009
Vehicles sold in Canada
When parking, firmly apply the parking
brake to avoid inadvertent creeping.
To set: Fully depress the parking brake
pedal. For better holding power, first de-
press the brake pedal and hold it while
setting the parking brake.
To release: Depress the parking brake
pedal while depressing the brake pedal.
To remind you that the parking brake is
set, the parking brake reminder light in
the instrument panel remains on until you
release the parking brake.
CAUTION
Driving with the parking brake en-
gaged can reduce braking power.
Before driving, be sure the parking
brake is fully released and the park-
ing brake reminder light is off.
53.Parking brake

139
3. Powerful cooling and dehumidifying
If the air conditioning does not work well
with the “A/C” button on, push the “MAX”
button. To cancel the “MAX” mode, push
the “MAX” button again. To turn off the air
conditioning, push the “A/C” button.
With the “MAX” button on, the gasoline
engine is frequently used.
The air conditioning may not turn on with
the selector lever in “N” position because
the gasoline engine cannot start.
If the “A/C” button indicator flashes, there
is a problem in the air conditioning system
and the air conditioning automatically
shuts off. If this happens, take your ve-
hicle to your Toyota dealer for service. For economical and environmentfriend-
ly use
Usually, use the air conditioning with the
“A/C” button on (economical and environ-
mentfriendly cooling).
In this mode the gasoline engine starts
and stops automatically and good fuel
economy driving is achieved.
To use the air conditioning in economi-
cal and environmentfriendly way, we
recommend the following setting:
1. Lower the setting temperature if you feel a little hot with the “A/C” button
on.
2. If you feel still hot with the “A/C” but- ton on, push the “MAX” button also.
After the compartment cools, turn off
the “MAX” mode only.

149
103.INFORMATION BEFORE DRIVING
YOUR TOYOTA
Information before driving your TOYOTA
Breakin period150
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Fuel 150
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Fuel pump shutoff system m 152. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation in foreign countries 152
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Threeway catalytic converter Toyota HC adsorber and catalyst system 153
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Engine exhaust cautions 154
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Facts about engine oil consumption 155
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Iridiumtipped spark plugs 156
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Brake system 156
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Brake pad wear limit indicators 160
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Luggage stowage precautions 160
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Your Toyota’s identification 161
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Theft prevention labels 162
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Suspension and chassis 162
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Types of tires 162
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SECTION 3

150
Drive gently and avoid high speeds.
Your vehicle does not need an elaborate
breakin. But following a few simple tips
for the first 1000 km (600 miles) can add
to the future economy and long life of
your vehicle:
Avoid fullthrottle acceleration when
starting and driving.
Avoid racing the hybrid engine.
Try to avoid hard stops during the first
300 km (200 miles).FUEL TYPE
Your vehicle must use only unleaded
gasoline.
To help prevent gas station mixups, your To-
yota has a smaller fuel tank opening.
The
special nozzle on pumps with unleaded fuel
will fit it, but the larger standard nozzle on
pumps with leaded gas will not.
At a minimum, the gasoline you use
should meet the specifications of ASTM
D4814 in the U.S.A. and CGSB 3.5M93
in Canada.
NOTICE
Do not use leaded gasoline. Use of
leaded gasoline will cause the three
way catalytic converter to lose its
effectiveness and the emission con-
trol system to function improperly.
Also, this can increase maintenance
costs.
OCTANE RATING
Select unleaded gasoline with an Oc-
tane Rating of 87 (Research Octane
Number 91) or higher. Use of unleaded fuel with an octane num-
ber or rating lower than stated above will
cause persistent heavy knocking. If se-
vere, this will lead to engine damage.
If your engine knocks ...
If you detect heavy knocking even when
using the recommended fuel, or if you
hear steady knocking while holding a
steady speed on level roads, consult your
Toyota dealer.
However, occasionally, you may notice
light knocking for a short time while accel-
erating or driving up hills. This is normal
and there is no need for concern.
GASOLINE CONTAINING DETERGENT
ADDITIVES
Toyota recommends the use of gasoline that
contains detergent additives to avoid build
up of engine deposits.
However, all gasoline sold in the U.S. con-
tains detergent additives
to keep clean and/or
clean intake systems.
104.Breakin period 105.Fuel

151
QUALITY GASOLINE
Automotive manufacturers in the U.S., Eu-
rope and Japan have developed a specifica-
tion for quality fuel named WorldWide
Fuel Charter (WWFC) that is expected to
be applied world wide. The WWFC consists
of three categories that depend on required
emission levels. In the U.S., category 3 has
been adopted. The WWFC improves air
quality by providing for better emissions in
vehicle fleets, and customer satisfaction
through better vehicle performance.
CLEANER BURNING GASOLINE
Cleaner burning gasoline, including refor-
mulated gasoline that contains oxygenates
such as ethanol or MTBE is available in
many areas.
Toyota recommends the use of cleaner
burning gasoline and appropriately blended
reformulated gasoline. These types of gas-
oline provide excellent vehicle perfor-
mance, reduce vehicle emissions, and im-
prove air quality. OXYGENATES IN GASOLINE
Toyota allows the use of oxygenate blended
gasoline where the oxygenate content is up
to 10% ethanol or 15% MTBE.
If you use
gasohol in your Toyota, be sure that it has
an octane rating no lower than 87.
Toyota does not recommend the use of
gasoline containing methanol.
GASOLINE CONTAINING MMT
Some gasoline contain an octane en-
hancing additive called MMT (Methylcy-
clopentadienyl Manganese Tricarbonyl).
Toyota does not recommend the use of
gasoline that contains MMT. If fuel con-
taining MMT is used, your emission con-
trol system may be adversely affected.
The Malfunction Indicator Lamp on the in-
strument cluster may come on. If this hap-
pens, contact your Toyota dealer for ser-
vice. GASOLINE QUALITY
In a very few cases, you may experience
driveability problems caused by the partic-
ular gasoline that you are using. If you
continue to have unacceptable driveability,
try changing gasoline brands. If this does
not rectify your problem, then consult your
Toyota dealer.
NOTICE

Do not use gasohol other than
stated above. It will cause fuel sys-
tem damage or vehicle performance
problems.
 If drivability problems are encoun-
tered (poor hot starting, vaporizing,
engine knock, etc.), discontinue its
use.
 Take care not to spill gasohol dur-
ing refueling. Gasohol may cause
paint damage.

152
106.FUEL TANK CAPACITY45 L (11.9 gal., 9.9 lmp. gal.)
The given fuel tank capacity is measured
on EPA/CARB ORVR testing condition
which is approved for nominal capacity
measurement condition.
The fuel tank capacity is decreased at low
ambient temperature. (decreased by about
5 L (1.3 gal., 1.1 lmp. gal.) at 10 C
(14 F).)
107.Fuel pump shutoff system
The fuel pump shutoff system stops sup-
plying fuel to the engine to minimize the
risk of fuel leakage when the engine stalls
or an airbag inflates upon collision. To
restart the hybrid system after the fuel
pump shutoff system activates, turn the
ignition switch to “ACC” or “LOCK” once
and start it.
CAUTION
Inspect the ground under the vehicle
before restarting the hybrid system. If
you find that liquid has leaked onto
the ground, the fuel system has been
damaged and it is in need of repair.
In this case, do not restart the hybrid
system.
If you plan to drive your Toyota in
another country...
First , comply with the vehicle registration
laws.
Second, confirm the availability of the cor-
rect fuel (unleaded and minimum octane
number).
108.Operation in foreign
countries

153
30p001b
1. Threeway catalytic converter
2. Toyota HC adsorber and catalyst sys-tem
The threeway catalytic converter and
Toyota HC adsorber and catalyst system
are emission control devices installed
in the exhaust system.
Its purpose is to reduce pollutants in the
exhaust gas.
CAUTION
Keep people and combustible mate-
rials away from the exhaust pipe
while the engine is running. The
exhaust gas is very hot.
Do not drive, idle or park your ve-
hicle over anything that might burn
easily such as grass, leaves, paper
or rags.
NOTICE
A large amount of unburned gases
flowing into the threeway catalytic
converter and Toyota HC adsorber
and catalyst system may cause it to
overheat and create a fire hazard. To
prevent this and other damage, ob-
serve the following precautions:
 Use only unleaded gasoline.
 Do not drive with an extremely low
fuel level; running out of fuel could
cause the engine to misfire, creat-
ing an excessive load on the three
way catalytic converter and Toyota
HC adsorber and catalyst system.
 Do not turn off the ignition while
the vehicle is moving.
 Keep your engine in good running
order. Malfunctions in the engine
electrical system, electronic ignition
system/distributor ignition system
or fuel system could cause an ex-
tremely high temperature of three
way catalytic converter and Toyota
HC adsorber and catalyst system.
109.Threeway catalytic
converter
Toyota HC adsorber and
catalyst system

154
If the engine becomes difficult to
start or stalls frequently, take your
vehicle in for a checkup as soon
as possible. Remember, your Toyota
dealer knows your vehicle and its
threeway catalytic converter and
Toyota HC adsorber and catalyst
system best.
 To ensure that the threeway cata-
lytic converter and Toyota HC ad-
sorber and catalyst system and the
entire emission control system op-
erate properly, your vehicle must
receive the periodic inspections re-
quired by the Toyota Maintenance
Schedule. For scheduled mainte-
nance information, refer to the
”Scheduled Maintenance Guide” or
”Owner ’s Manual Supplement”.
 Do not apply coating agent such as
for antirust undercoating to the
exhaust pipe (especially to the ac-
tuator to valve).CAUTION
Avoid inhaling the engine exhaust.
It contains carbon monoxide, which
is a colorless and odorless gas. It
can cause unconsciousness or even
death.
Make sure the exhaust system has
no holes or loose connections. The
system should be checked from
time to time. If you hit something,
or notice a change in the sound of
the exhaust, have the system
checked immediately.
Do not run the hybrid system in a
garage or enclosed area except for
the time needed to drive the vehicle
in or out. The exhaust gases cannot
escape, making this a particularly
dangerous situation.
Do not remain for a long time in a
parked vehicle with the hybrid sys-
tem running. If it is unavoidable,
however, do so only in an uncon-
fined area and adjust the heating or
cooling system to force outside air
into the vehicle.
Keep the trunk lid closed while
driving. An open or unsealed trunk
lid may cause exhaust gases to be
drawn into the vehicle.
To allow proper operation of your
vehicle’s ventilation system, keep
the inlet grilles in front of the wind-
shield clear of snow, leaves, or oth-
er obstructions.
If you smell exhaust fumes in the
vehicle, drive with the windows
open and the trunk lid closed. Have
the cause immediately located and
corrected.
110.Engine exhaust cautions