2004 TOYOTA PRIUS key battery

11
Your vehicle is equipped with push but-
ton start. The hybrid system will start
automatically by pressing the “POWER”
switch briefly with the brake pedal de-
pressed.
Without smart function1. Insert the key.
2. Press the “POWER” switch briefly with the brake pedal depressed.
With smart function
1. Carry the key with you.
2. Press the “POWER” switch briefly with the brake pedal depressed.
The “READY” light flashes and stays on.
A beep sounds after a few seconds, and
the hybrid system will start. (If the ambi-
ent temperature is low such as during
winter, it may take time until the “READY”
light comes on.) You cannot start your
vehicle when the brake pedal is not de-
pressed. (For details, see “How to start
the hybrid system—” on page 230.)
The engine may not start even with the
“READY” light on. Drive your vehicle with a smooth accel-
eration and deceleration.
While driving, energy is recovered
through the regenerative brake as the
vehicle decelerates. However, for more
efficient use, do not accelerate or de-
celerate your vehicle more than neces-
sary.
Avoid abrupt acceleration and decelera-
tion.
The remaining capacity of the hybrid
vehicle battery can be confirmed on
the energy monitor screen of the multi
−
information display. See “Information”
on page 150 for details. Gradual or
non− abrupt acceleration or deceleration
will more effectively use the benefits of
an electric motor without having to use
gasoline engine power. When parking, be sure to put the hy-
brid transaxle in “P”. While driving, use
the hybrid transaxle in “D”.
In “N”, the gasoline engine operates
but electricity cannot be generated. The
battery will be discharged requiring un-
necessary engine power to recharge.
The hybrid system automatically re-
charges the hybrid vehicle battery
when the remaining battery power is
reduced. However, the charging is not
available if the hybrid transaxle is “N”.
Starting your vehicle
For efficient use of your
vehicle

13
These high voltage parts or cables
consisting of an electromagnetic
shielding structure produce relatively
the same amount of electromagnetic
waves as conventional gasoline
fueled vehicles or home electric ap-
pliances.
As unwanted noise may occur in the
reception of mobile radios, contact
your Toyota dealer for installation or
removal.
Always keep your hybrid vehicle’s driv-
ing characteristics in mind.
CAUTION
The driver should pay full attention
around the vehicle especially when it
is driven only by the electric motor
(with the gasoline engine stopped).
People in the immediate area might
misjudge the hybrid vehicle move-
ment based on the absence of the
regular engine noise.
When the hybrid system is started or
stopped, you may hear a sound coming
from the hybrid vehicle battery in the
luggage compartment. However, this
does not indicate any trouble.
As the vehicle runs with both the gaso-
line engine and electric motor, you may
hear a motor sound coming from the
engine compartment.
If the “READY” light is on, you can
start even though the gasoline engine
may be off.
When you shift the shift lever to “B”
and release it to its original position
and your foot from the accelerator ped-
al, engine braking will be applied. How-
ever, during high speed driving you
may feel that deceleration by engine
braking is less than that of ordinary
vehicle.
Be sure to put the hybrid transaxle in
“P” when parking.
In “N”, the hybrid vehicle battery assembly
is not charged, even if the gasoline en-
gine is operating. You cannot run your
vehicle if the hybrid transaxle is left in “N”
for a long time because the hybrid vehicle
battery assembly will be discharged. When you leave your vehicle, apply the
parking brake to put the hybrid trans-
axle in “P” and be sure to carry the
key with you and lock all the doors.
If you leave the hybrid system in “ACC”
or “IG
−ON”, the hybrid system may not
start because the auxiliary battery will be
discharged.
CAUTION
When you leave your vehicle, be
sure to shut off the hybrid system.
Be sure to put the hybrid transaxle
in “P” because the vehicle can start
with the “READY” light on and the
engine stopped (no engine sound
and vibration). When the “READY”
light is on, if you leave your ve-
hicle in shift position other than
“P” and “N”, the vehicle will creep
and start abruptly with the accelera-
tor pedal being depressed by mis-
take. This may cause death or seri-
ous injury.

15
CAUTION
If you are involved in an accident,
follow these precautions.
Move the vehicle to a safe place
and perform the followings to re-
duce the risk of high voltage elec-
tricity leakage. Depress the brake pedal and apply
the parking brake.
 Press the “P” position switch and
stop the hybrid system.
 If the key is inserted into key slot,
remove it.
If your vehicle has experienced ma-
jor damage, you may get an electric
shock. To prevent this, never touch
the high voltage parts (hybrid ve-
hicle battery assembly, etc.) or
cables (orange color) connecting
these parts. If some exposed elec-
tric wires are protruding inside or
outside of the vehicle, an electric
shock may also occur. Never touch
them.
If the fluid leaks or gets in some
part of the vehicle, never touch it
because it may be electrolyte
(strong alkali) from the hybrid ve-
hicle battery. If it gets on your skin
or eyes, wash off immediately with
a large amount of water, if possible,
with boric acid solution, and get
immediate medical attention in or-
der to help avoid serious injury.
If a vehicle fire occurs, extinguish
it using a fire extinguisher for the
exclusive use on electric fires. As
a small amount of water may be
dangerous, use a large amount of
water, for example from a fire hy-
drant, or wait for a firefighting
team arrival.
If your vehicle needs to be towed,
do it with the front wheels or all
four wheels raised. If the front
wheels are on the ground when
towing, the electric motor may con-
tinue to generate electricity which
could leak electricity. A fire could
occur depending on the degree of
damage. See “If your vehicle needs
to be towed” on page 254.

23
21p120
1. Locking and unlocking
2. Starting the hybrid system
By carrying a smart key, you can lock
and unlock the doors and start the hy-
brid system.
For locking the doors, see “Locking the
doors with smart function” on page 28.
For unlocking the doors, see “Unlocking
the door(s) with smart function” on page
29. For starting the hybrid system, see
“Push button start” on page 130.
If the smart key battery is discharged, the
smart function cannot be used. Use the
mechanical key attached to the smart key
by inserting it in the driver’s door keyhole
to lock or unlock door. To start the hybrid
system, insert the smart key into the key
slot. In order to activate the smart func-
tion, the battery should be replaced. For
details, see “REPLACING THE BATTERY”
on page 36.
You can deactivate the smart function by
using the cancel switch. In this case, all
the smart function will be deactivated. For
details, see “Deactivating the smart func-
tion” on page 32.INFORMATION
Be sure to take the smart key with
you.
In the following cases, the smart
function or wireless remote control
feature may not operate properly. (If
this happens, use a mechanical key
to lock or unlock the driver’s door
and a smart key to start the hybrid
system.) When facilities issuing strong
electromagnetic waves such as
TV towers, electric power sta-
tions, broadcasting stations are
nearby.
 When you are carrying a smart
key together with a mobile com-
munications system such as a
twoway radio or cellular phone.
 When the smart key is in contact
with or covered by a metallic ob-
ject.
 When another person is operating
a wireless remote control func-
tion on another vehicle near your
vehicle.
Smart entry and start system

26
(g) Preventing the key from beinglocked inside the vehicle
When you close the door with the hybrid
system off but with the smart key left in
the vehicle, and attempt to lock all the
doors using smart locking function, it is
determined that the smart key is in the
vehicle.
Outside alarm: One beep (sounds for 2
seconds)
INFORMATION
 This function may not operate when
the smart key is left on the instru-
ment panel, luggage cover, floor or
in the glove box.
 The function may operate if the
smart key is brought outside but it
is very close to the door window or
door handle.
(h) Low smart key battery
When the hybrid system is turned to
“ACC” or “OFF” about 20 minutes after
the hybrid system is turned on or to “IG −
ON”, it is determined that the smart key
battery voltage is low.
Inside alarm: One beep (i) Outside of effective range
When the “POWER” switch is pressed, it
is determined that the smart key is not in
the vehicle.
Inside alarm: One beep
Warning light: On (for 5 seconds)
(j) Open door warning
When you attempt to lock all the doors
using smart locking function with the hy-
brid system turned off but with any door
open.
Outside alarm: One beep (sounds for 10
seconds)
Alarms will be turned off by either of
the following operations:
Closing all the doors
Pressing the “” (unlock) button on
the smart key

27
Warning and its meaningInside warning alarm
Outside warning alarmWarning lightCauses
One beep
(sounds continuously)——The driver ’s door was opened when the hybrid system was in “ACC”
or “IG −ON” and when the transaxle was in a position other than “P”.
One beep
(sounds continuously)One beep
(sounds continuously)OnThe driver brought out the smart key from the vehicle with the hybrid
system not to be turned off and with the transaxle in a position other
than “P”.
Beeps
(sound intermittently)——The driver ’s door was opened when the hybrid system was in “ACC”
and when the transaxle was in “P”.
One beep3 beepsOnThe driver brought out the smart key from the vehicle with the hybrid
system not to be turned off and with the transaxle in “P”.
—One beep
(sounds for 2 seconds)OnThe lock switch was pressed with the hybrid system not to be turned
off and with the transaxle in “P”.
One beep3 beepsOnThe passenger brought out the smart key from the vehicle with the
hybrid system not to be turned off.
—One beep
(sounds for 2 seconds)—The lock switch was pressed when the hybrid system was off but with
the smart key left in the vehicle.
One beep——The key battery voltage become about 2 V. (3 V for normal operation)
One beep—On
(for 5 seconds)The “POWER” swi t c h was pr es s ed when the smar t key was not in the
effective range of the system.
—One beep
(sounds for 10 seconds)—The lock switch was pressed when the hybrid system was off but any
door was opened.

31
INFORMATION
When changing the mode, be sure
to push both “ ” (lock) and “ ”
(panic) buttons firmly, or panic
alarm may be activated.
 This operation will not change the
wireless remote control unlocking
function.
 In the single or driver’s door un-
locking mode, if you get into the
vehicle from the driver’s door carry-
ing the smart key, all the smart un-
locking controls activated by the
smart key will be stopped for secu-
rity. If you get out of the vehicle
from the driver’s door carrying the
smart key and get out of the effec-
tive range of the smart function,
unlocking control by the smart key
will be possible. However, unlocking
control may not be carried out for
5 seconds after you get out from
the vehicle. In this case, operate
unlock control again after 5 sec-
onds.
BATTERY POWER SAVING
When doors are locked, the smart entry
and start system transmits electromagnetic
waves to the outside of the vehicle at
regular intervals. For this reason, the ve-
hicle battery will be discharged if the ve-
hicle is left for a long time. If the key is
left within the effective range of the smart
function outside of the vehicle, the key
and the vehicle transmit electromagnetic
waves periodically. If these conditions con-
tinue for a long time, the battery in the
key and vehicle will be discharged.
To prevent the batteries from being dis-
charged, the smart function is automatical-
ly deactivated in the following conditions:
If there is no response from the key
for more than 14 days
If the key is left within the effective
range of the smart function outside of
the vehicle for more than 10 minutes To reactivate the smart function, perform
any of the following:
(a) Press the lock button on the outside front door handle or back door while
carrying the smart key.
(b) Perform a wireless remote control op- eration.
(c) Insert and turn the mechanical key in the keyhole of the driver’s door.

32
INFORMATION
To maintain communication with the
vehicle, smart keys use builtin bat-
tery power. The battery service life
is about 1 to 3 years on average. If
battery power becomes insufficient,
replace the battery with a new one.
The smart key continually receives
electromagnetic waves, and if it re-
ceives strong electromagnetic waves
over a period of time, the battery
can be drastically run down. There-
fore, avoid storing smart keys near
any electrical appliances.Here is a list of electrical ap-
pliances which may have adverse
effects on the smart key perfor-
mance: TVs, personal computers,
cellular phone or cordless phone
recharger units, electric light stands
and fluorescent desk lights
Note that you should always keep
such electrical appliances at least 1
m (3 ft.) away from the smart key.
21p138a
1. Smart function is on.
2. Smart function is off.
DEACTIVATING THE SMART FUNCTION
The cancel switch for this function is
located at the bottom of the instrument
panel on the driver side. When you
push the switch, the smart function will
be deactivated. Pushing the switch
again will reactivate the function.
When the smart function is deactivated,
use a mechanical key or wireless remote
control function key to lock and unlock the
doors. To start the hybrid system, insert
a smart key into the key slot. If you do not intend to drive your vehicle
for a long time, push the cancel switch to
deactivate the smart function.
INFORMATION
The smart function will be deactivated
in the following cases:
The cancel switch is turned on.
The smart key is inserted into the
key slot.
The battery of the smart key is dis-
charged.