2010 TOYOTA PRIUS battery

38 1-1. Hybrid system
PRIUS_U (OM47668U) U.S.A.
CAUTION
■High voltage precautions
The vehicle has high voltage DC and AC systems as well as a 12 volt sys-
tem. DC and AC high voltage is very dangerous and can cause severe burns
and electric shock that may result in death or serious injury.
● Never touch, disassemble, remove or replace the high voltage parts,
cables and their connectors.
● The hybrid system will become hot after starting as the system uses high
voltage. Be careful of both the high voltage and the high temperature, and
always obey the caution labels attached to the vehicle.
■ Hybrid battery (traction battery)
Your vehicle contains a sealed nickel- metal hydride battery. If disposed of
improperly, it is hazardous to the environment and there is a risk of severe
burns and electrical shock that may result in death or serious injury.
■ Emergency shut off system
● Carefully check to see if there are exposed high voltage parts or cables.
Never touch the parts or cables. (
P. 32)
● Carefully inspect the ground under the vehicle. If you find that liquid has
leaked onto the ground, the fuel system may have been damaged. Leave
the vehicle as soon as possible.
●Never try to open the service plug
access hole located in the luggage
compartment. The service plug is used
only when the vehicle is serviced and is
subject to high voltage.
● Do not subject the service plug to
strong impacts. Also, avoid splashing
large amount of water onto the luggage
compartment, for example while in a
high-pressure car wash.

39
1-1. Hybrid system
1
Before driving
PRIUS_U (OM47668U) U.S.A.
CAUTION
■
Road accident cautions
Observe the following precautions to reduce the risk of injury.
● Pull your vehicle off the road, push the “P” position switch, apply the park-
ing brake and turn the hybrid system off.
● Do not touch the high voltage parts, cables and connectors.
● If electric wires are exposed inside or outside your vehicle, an electric
shock may occur. Never touch exposed electric wires.
● If a fluid leak occurs, do not touch it as it may be strong alkaline electrolyte
from the hybrid battery (traction battery). If it comes into contact with your
skin or eyes, wash it off immediately with a large amount of water or if pos-
sible, boric acid solution. Seek immediate medical attention.
● If a fire occurs in the hybrid vehicle, leave the vehicle as soon as possible.
Never use a fire extinguisher that is not meant for electric fires. Using even
a small amount of water may be dangerous.
● If your vehicle needs to be towed, do so with the front wheels raised. If the
wheels with the electric motor (traction motor) are on the ground when
towing, the motor may continue to generate electricity. This may cause an
electricity leakage leading to a fire. (
P. 487)

40 1-1. Hybrid system
PRIUS_U (OM47668U) U.S.A.
NOTICE
■Hybrid battery air vent
● Do not put foreign objects over the air vent. The hybrid battery (traction
battery) may overheat and be damaged.
● Clean the air vent regularly to prevent the hybrid battery (traction battery)
from overheating.
● Do not wet the air vent. It may cause a short circuit and damage the hybrid
battery (traction battery).
● Do not load a large amount of water such as an aquarium into the vehicle.
If water spills over the hybrid battery (traction battery), the battery may be
damaged.

41
1
Before driving
PRIUS_U (OM47668U) U.S.A.
1-2. Key information
Keys
Using the mechanical keyTake out the mechanical key.
After using the mechanical key,
store it in the electronic key. Carry
the mechanical key together with
the electronic key. If the electronic
key battery is depleted or the
smart key system does not oper-
ate properly, you will need the
mechanical key.
The following keys are provided with the vehicle.
Electronic keys
• Operating the smart key system ( P. 43, 57)
• Operating the wireless
remote control function 
( P. 63)
Mechanical keys
Key number plate

49
1-2. Key information
1
Before driving
PRIUS_U (OM47668U) U.S.A.
■
Battery-saving function
In the following circumstances, the entry function is disabled in order to pre-
vent the vehicle battery from discharging and electronic key battery from
depleting.
● When the entry function has not been used for 5 days or more
● When the electronic key has been left within approximately 6 ft. (2 m) of
the vehicle for 10 minutes or more
● If the entry function has not been used for 9 days or more, the vehicle
cannot be unlocked by a door other than the driver’s door. To unlock the
vehicle, grip the driver’s door handle or use the wireless remote control
or the mechanical key.
The system will resume operation when...
● The vehicle is locked touching the door handle lock sensor area.
● The vehicle is locked/unlocked using the wireless remote control function 
( P. 63) or the mechanical key. ( P. 541)
■ Electronic key battery depletion
 P. 6 4

54 1-2. Key information
PRIUS_U (OM47668U) U.S.A.
*1: A message will be shown on the multi-information display in the instru-ment cluster.
*2: If the hybrid system does not start when the electronic key is inside the vehicle, the electronic key battery may be depleted or there may be dif-
ficulties receiving signal from the key. ( P. 541)
AlarmSituationCorrection procedure
Interior alarm
pings once
*1
The electronic key has a
low battery Replace the electronic
key battery
An attempt was made to
start the hybrid system
without the electronic key
being present, or the elec-
tronic key was not func-
tioning normally Start the hybrid sys-
tem with the elec-
tronic key present
*2
Interior alarm
pings once and
exterior alarm
sounds 3 times
*1
The driver’s door was
closed after the key was
carried outside the vehicle,
and the “POWER” switch
was not turned OFF
Turn the “POWER”
switch OFF and close
the driver’s door again
An occupant carried the
electronic key outside the
vehicle and closed the
door while the “POWER”
switch was not OFF Bring the electronic
key back into the vehi-
cle

55
1-2. Key information
1
Before driving
PRIUS_U (OM47668U) U.S.A.
■
If the smart key system does not operate properly
● Locking and unlocking the doors: Use the mechanical key. ( P. 541)
● Starting the hybrid system: P. 542
■ When the electronic key battery is fully depleted
 P. 460
■ Customization that can be co nfigured at Toyota dealer
Settings (e.g. smart key system) can be changed. 
(Customizable features P. 587)
■ Certification for the smart key system
For vehicles sold in the U.S.A.
FCC ID: NI4TMLF8-2
FCC ID: HYQ14ACX FCC ID: HYQ14ADF 
FCC ID: HYQ13CZD FCC ID: HYQ13CZE
NOTE: 
This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful interfer-
ence, and (2) this device must accept any interference received, including
interference that may cause undesired operation.
FCC WARNING: 
Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
For vehicles sold in Canada
NOTE: 
Operation is subject to the following two conditions: (1) this device may not
cause interference, and (2) this device must accept any interference, includ-
ing interference that may cause undesired operation of the device.

59
1-2. Key information
1
Before driving
PRIUS_U (OM47668U) U.S.A.
■
Conditions aff ecting operation
 P. 6 5
■ Electronic key battery depletion
 P. 6 4
■ To operate the system properly
Make sure to carry the electronic key when operating the system.
Depending on the position and holding condition of the electronic key, the
key may not be detected correctly and the system may not operate properly.
(The alarm may go off accidentally, or the door lock prevention may not func-
tion.)
■ Note for the smart key system
● Even when the electronic key is within the effective range (detection
areas), the system may not operate properly. 
For example, the electronic key is on the instrument panel, luggage
cover, floor or in the glove box when the hybrid system is started or
“POWER” switch modes are changed.
● Even if the electronic key is not inside the vehicle, it may be possible to
start the hybrid system if the electronic key is near the window.