air conditioning TOYOTA PRIUS 2002 1.G Owners Manual

3
1. Headlight and turn signal switch
2. Wiper and washer switch
3. Rear window defogger switch
4. Trip meter reset button
5. Emergency flasher switch
6. Multi−information display
7. Switching km/h MPH button
8. Security indicator light
9. Clock
10. Car audio 11. Air conditioning controls
12. Auxiliary box
13. Power outlet
14. Ignition switch
15. Cruise control switch
16. Power rear view mirror control switch
17. Instrument panel light control dial
11p001g

8
Toyota hybrid system combines the
gasoline engine and the electric motor
power to improve the fuel economy
largely and minimize the emissions as
well as to provide higher power perfor-
mance than the ordinary gasolinepow-
ered vehicles.
Depending on the driving condition, the
vehicle runs on the best combination of;
Gasoline engine power
Electric motor power generated by
the gasoline engine
Electric motor power of the hybrid
vehicle battery
Furthermore, the energy is effectively used
in the following ways:
When stopping the vehicle, the gaso-
line engine is automatically stopped.
When decreasing the speed by apply-
ing the brakes, electricity converted
from the turning force of the wheels is
stored in the hybrid vehicle battery.
(This is called regenerative brake.) Since the battery is charged by the
gasoline engine as needed, it does not
require charging from the outside like
an electric vehicle.
In this way, greatly improved fuel economy
and reduced emissions are attained.
If you do not use the vehicle for a long
time, the hybrid vehicle battery will dis-
charge and the battery condition is liable
to decline.
Basic operations are described below. Be-
sides, Toyota hybrid system performs vari-
ous controls depending on the operating
condition, such as at the time of hybrid
system starting, at the time of charging
should be required, at the time of the air
conditioning is in use, etc.
Toyota hybrid system
Toyota hybrid system
operating condition

11
Turn the ignition key from “ON” to
“START” with the running mode selector
lever in “P” position only. When the
“READY” light flashes and stays on and
a beep sounds after a few seconds, the
hybrid system starts. (If the ambient tem-
perature is low such as during winter con-
ditions, it may take time until the
“READY” light is on.) Being different from
ordinary vehicles, you cannot start your
vehicle with the running mode selector le-
ver in “N” position. (For details, see “How
to start the hybrid system—” on page 162
in Section 4.)Drive your vehicle with a smooth accel-
eration and deceleration.
When driving, energy is effectively re-
covered through the regenerative brake
as the vehicle decelerates. However,
for more efficient use, do not acceler-
ate or decelerate your vehicle more
than necessary.
By avoiding abrupt acceleration and de-
celeration, the remaining capacity of
the hybrid vehicle battery can be pre-
served and it makes it possible to run
the vehicle utilizing the gasoline engine
and the electric power from the hybrid
vehicle battery.
The remaining capacity of the hybrid
vehicle battery can be confirmed on
the energy monitor screen of the multi
−
information display. See “Information”
on 113 page in Section 2 −6 for details.
As the way in which you drive may
decrease the remaining capacity of the
hybrid vehicle battery and reduce fuel
economy, drive your vehicle without
abrupt acceleration or deceleration. Use the “A/C” mode (with the “A/C”
button only on) when you use the air
conditioning.
As the gasoline engine starts and
stops automatically in this mode, eco-
nomical driving with less emissions is
possible.
In the “MAX” mode (with the “A/C” but-
ton and “MAX” button on), the gasoline
engine is frequently used. Use this
mode only when you need to operate
the air conditioning fully such as when
you should dehumidify or when you are
under a burning sun.
When parking, be sure to put the run-
ning mode selector lever in “P” posi-
tion. While driving, use “D” position.
With the selector lever in “N” position,
the gasoline engine operates but elec-
tricity cannot be generated. The
constant electrical power remaining in
the hybrid vehicle battery becomes in-
sufficient and the battery will be dis-
charged.
Starting your vehicle For efficient use of your
vehicle

12
The hybrid system automatically con-
trols the level of electrical power re-
maining in the hybrid vehicle battery.
With the selector lever in a position
other than “N”, electricity is generated
and charging occurs when the level of
electrical power in the hybrid vehicle
battery decreases. It is unnecessary to
charge the hybrid vehicle battery from
outside.
INFORMATION:
The gasoline engine starts and stops
automatically. (It stops during a low
load driving, deceleration or when the
vehicle stopped.)
If the “READY” light remains on, you
can start your vehicle using the electric
motor even with the gasoline engine
stopped.
The gasoline engine may not stop auto-
matically in the following conditions:
 During under gasoline engine warm
up
 During hybrid vehicle battery charg-
ing
 When the air conditioning is used in
the “MAX” mode, the gasoline engine
is frequently used. If the output control warning light ()
comes on in the instrument cluster, the
hybrid vehicle battery temperature is
low or high, or the hybrid vehicle bat-
tery capacity is decreased with the se-
lector lever at “R” during driving. As it
does not indicate the failure of the sys-
tem, you can continue driving but avoid
hard acceleration because the power is
insufficient (which is caused by the bat-
tery power deterioration).
The vehicle runs in combination with
the gasoline and electric power. Pay
special attention to the following items.
Be careful of a high voltage and high
temperature.
Your vehicle is equipped with the orange
colored cables connected to the hybrid
vehicle battery which contain a high volt-
age (about 300 V) and to other high volt-
age parts.
CAUTION
Do not touch or come in contact with
orange cables or battery terminals.
Electric shock may cause serious in-
jury or death. Read all caution labels.
A electric motor, coolant radiator and
some other parts reach high temperature
when you are driving. Caution labels are
applied to these parts. Carefully observe
the instructions on these caution labels.
Precautions for use

93
The brake system warning light re-
mains on together with the “ABS”
warning light.
In this case, not only the antilock
brake system will fail but also the
vehicle will become extremely unsta-
ble during braking.
Any of the following conditions may oc-
cur, but do not indicate the malfunc-
tion:
The light may stay on for about 60
seconds after the ignition key is turned
to the “ON” position. It is normal if it
turns off after a while.
Depressing the brake pedal repeatedly
may turn on the warning light and
buzzer. It is normal if the light turns off
and the buzzer stops sounding after a
few seconds.
You may hear a small sound in the
engine compartment after the hybrid
system is started or the brake p edal is
depressed repeatedly. This is a pump
pulsating sound of the brake system,
and it is not a malfunction. (b) Driver’s Seat Belt Reminder Light
and Buzzer
This light and buzzer remind you to
buckle up the driver’s seat belt.
Once the ignition key is turned to ”ON” or
”START”, the reminder light flashes and
the buzzer sounds if the driver ’s seat belt
is not fastened. Unless the driver fastens
the belt, the light keeps on flashing and
the buzzer sounds 4 to 8 seconds.
(c) Front Passenger ’s Seat Belt Reminder Light
This light reminds you to buckle up the
front passenger ’s seat belt.
Once the ignition key is turned to “ON” or
“START”, the reminder light flashes if a
passenger sits in the front passenger seat
and does not fasten the seat belt. Unless
the front passenger fastens the belt, the
light stays flashing.
If luggage load is placed on the front
passenger seat, depending on its weight
and how it is placed on the seat, built −in
sensors in the seat cushion may detect
the pressure, causing the reminder light to
come on. (d) Discharge Warning Light
This light warns that the auxiliary battery
is being discharged.
If it comes on while you are driving, there
is a problem somewhere in the charging
system.
The hybrid system will continue to oper-
ate, however, until the auxiliary battery is
discharged. Turn off the air conditioning,
blower, radio, etc., and drive directly to
the nearest Toyota dealer or repair shop.

131
OPERATION OF INSTRUMENTS AND
CONTROLS
Air conditioning system
Controls132
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Air flow selector settingss 136
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Operating tips 136
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Instrument panel vents 138
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SECTION 2– 8

132
1. Air intake selector
2. Air flow selector
3. Temperature selector
4. Fan speed selector
5. Air conditioning on−off buttons
Controls
27P001e

133
“AUTO” position (for fan speed)
For automatic operation of the air condi-
tioning, turn the fan speed selector knob
to “AUTO” position.
In the automatic operation mode, the air
conditioning selects the most suitable fan
speed according to the temperature.
You may use manual controls if you want
to select your own settings.
Fan speed selector
Turn the knob to adjust the fan speed—to
the right to increase, to the left to de-
crease.
In automatic operation, you do not have
to adjust the fan speed unless you desire
another fan speed mode.
Temperature selector
Turn the knob to adjust the temperature
to the right to warm and then to the left
to cool.
27p002
Air flow selector
Turn the knob to select the vents used for
air flow.1. Panel— Air flows mainly from the
instrument panel vents.
2. Bilevel— Air flows from both the floor
vents and the instrument panel vents.
3. Floor— Air flows mainly from the floor
vents.
4. Floor/Windshield— Air flows mainly
from the floor vents and windshield
vents.
This position allows the air intake to
select FRESH automatically. This is to
clean up the front view more quickly. If you want to return the setting to RE-
CIRCULATE mode, press the air intake
selector button once again.
Press the “A/C” and “MAX” button for
dehumidified heating or cooling. This
setting clears the front view more
quickly.
5. Windshield— Air flows mainly from the
windshield vents.
Turning the air flow selector to the
windshield position turns on the defog-
ging function with the purpose of clear-
ing the front view.
This position allows the air intake to
select FRESH automatically. This is to
clean up the front view more quickly.
If you want to return the setting to RE-
CIRCULATE mode, press the air intake
selector button once again.
For details about air flow selector settings,
see “Air flow selector settings” on page
136.

134
27p003a
Air intake selector
Press the button to select the air source.1. Recirculate— Recirculates the air inside
the vehicle.
2. Fresh— Draws outside air into the sys-
tem.
The air intake selector button is used to
switch the air intake FRESH mode that
draws outside air into the system and RE-
CIRCULATED mode that recirculates the
air inside vehicle.
To turn the air source to RECIRCULATED
mode, press the button. The indicator will
come on. To turn the air source to FRESH
mode, press the button again. The indica-
tor will go off. To prevent fogging up of the windshield,
the air intake mode may change automati-
cally to FRESH depending on the condi-
tion of the air conditioning system.
2way air intake control
To improve fuel economy, “Fresh” mode
control changes when the air intake se-
lector is set in “Fresh” mode on the
following conditions:
When the maximum heating is needed
with the air flow in “Floor” or “Floor/
Windshield”, fresh air flows in the up-
per compartment, while air is recircu-
lated in the lower compartment.
When cooling is needed, both fresh
and recirculate modes turns on.
27p004b
Air conditioning onoff buttons
To turn on the air conditioning, push
the “A/C” button.
1. Turning off the air conditioning
Push the “A/C” button to turn off the air
conditioning. 2. Economical and environmentfriendly cooling
Usually use the air conditioning with the
“A/C” button on. If you push the button
again, the air conditioning turns off.

135
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-
ment
−friendly 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.