warning TOYOTA PRIUS 2010 3.G Owner's Guide

238 2-4. Using other driving systems
PRIUS_U (OM47668U) U.S.A.
Indication on the multi-information display
While the LKA system is on, the lane line display and steering wheel
display (in case of lane keeping assist function) are shown on the
multi-information display to info rm that the LKA system is on.
Steering wheel display
The lane keeping assist function
is active.
Dynamic radar cruise control
display
Lane line display
When thin lines are shown: 
A lane marking is not recognized
by the system, or the LKA system
functions are temporarily can-
celed. (When the lane keeping
assist function is canceled,
buzzer will beep twice.)
When solid lane lines are shown: 
The lane departure warning func-
tion is active.ITO24P133

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When driving
PRIUS_U (OM47668U) U.S.A.
■Temporary cancellation of the LKA system functions
If any of the following occurs, the LKA system functions will be temporarily
canceled. The functions will resume after the necessary operating conditions
have returned.
● The turn signal lever is operated.
● The steering wheel is turned as far as necessary to cause the vehicle to
change lanes.
● The brake pedal is depressed. 
The lane keeping assist function will not resume even after the brake
pedal is released because depressing the brake pedal also cancels the
dynamic radar cruise control.
● The vehicle speed deviates from the operating range of the LKA system
functions. (The buzzer will beep twice when the lane keeping assist func-
tion is being canceled.)
● When the lane lines cannot be recognized while driving. (The buzzer will
beep twice when the lane keeping assist function is being canceled.)
● Low speed or high speed wiper operation states. (The buzzer will beep
twice when the lane keeping assist function is being canceled.) 
The buzzer may not beep when the LKA system functions are canceled
because the notification of dynamic radar cruise control cancellation
takes priority over the LKA system and cancels the function.
● The no-handed driving warning activates while the lane keeping assist
function is active. (The buzzer will beep twice.)

240 2-4. Using other driving systems
PRIUS_U (OM47668U) U.S.A.
■No-handed driving warning
If the steering wheel is not operated for about 15 seconds on a straight road
or about 5 seconds on a curve, the buzzer will beep twice, indicators on the
multi-information display will flash, and the lane keeping assist function will
be temporarily canceled. If you drive the vehicle with your hands lightly
touching the steering wheel, this may also be detected as no-handed driv-
ing.
■ When the vehicle has been parked in the sun
The LKA system functions may not be available for a while after driving has
started. In such cases, turn the LKA system off and turn it on again after nor-
mal temperature returns. When the temperature in the cabin decreases and
the temperature around the camera sensor becomes suitable for its opera-
tion, the functions will begin to operate.
CAUTION
■Before using the LKA system
Do not rely on the LKA system to remain within a selected lane. The LKA
system is not designed to enable inattentive driving. The steering wheel
should be operated by the driver to mainta in the vehicle in a suitable position
within its lane. Always drive carefully.

248 2-4. Using other driving systems
PRIUS_U (OM47668U) U.S.A.
CAUTION
■When the Enhanced VSC is activated
The slip indicator light flashes and a warning buzzer sounds. Always drive
carefully. 
Reckless driving may cause an accident. Exercise particular care when the
indicator light flashes and a buzzer sounds.
■ Replacing tires
Make sure that all tires are of the same size, brand, tread pattern and total
load capacity. In addition, make sure that the tires are inflated to the speci-
fied tire pressure level.
The ABS and Enhanced VSC will not function correctly if different tires are
fitted on the vehicle.
Contact your Toyota dealer for further information when replacing tires or
wheels.
■ Handling of tires and suspension
Using tires with any kind of problem or modifying the suspension will affect
the driving assist systems, and may cause the system to malfunction.

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When driving
PRIUS_U (OM47668U) U.S.A.
Pre-Collision System
: If equipped
Safety systems such as the brakes and seat belts are automati-
cally engaged to lessen impact and in juries to occupants as well as
vehicle damage when the radar sensor detects an unavoidable
frontal collision.
■ Pre-collision seat belts
If the pre-collision s ensor detects that a co llision is unavoidable,
the pre-collision system will retract the seat belt before the colli-
sion occurs. 
The same will happen if the driver makes an emergency braking
or loses control of the vehicle. ( P. 8 6 )
■ Pre-collision brake assist
When there is a high possibility of a frontal collision, the system
applies greater braking force in relation to how strongly the
brake pedal is depressed.
■ Pre-collision braking
When there is a high possibility of a frontal collision, the system
warns the driver using a warning light, warning display and
buzzer. If the system determines that a collision is unavoidable,
the brakes are auto matically applied to reduce the collision
speed. Pre-collision braking can be disabled using the pre-colli-
sion braking off button.

250 2-4. Using other driving systems
PRIUS_U (OM47668U) U.S.A.
Disabling pre-collision brakingEnabled
Disabled
The “PCS” warning light comes
on when the pre-collision braking
is disabled.
Radar sensorDetects vehicles or other obsta-
cles on or near the road ahead
and determines whether a colli-
sion is imminent based on the
position, speed, and heading of
the obstacles.
ITO24P116
ITO24P131

252 2-4. Using other driving systems
PRIUS_U (OM47668U) U.S.A.
■Conditions that may trigger the system even if there is no danger of
collision
● When there is an object by the roadside at the entrance to a curve
● When passing an oncoming vehicle on a curve
● When driving over a narrow iron bridge
● When there is a metal object on the road surface
● When driving on an uneven road surface
● When passing an oncoming vehicle on a left-turn
● When your vehicle rapidly closes on the vehicle in front
When the system is activated in the situations described above there is also
a possibility that the seat belts will retract quickly and the brakes will be
applied with a force greater than normal. When the seat belt is locked in the
restricted position, stop the vehicle in a safe place, release the seat belt and
refasten.
■ When there is a malfunction in the system
Warning lights and/or warning messages will turn on or flash. ( P. 508)

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When driving
PRIUS_U (OM47668U) U.S.A.
■Certification
For vehicles sold in the U.S.A.
FCC ID: HYQDNMWR004
FCC WARNING 
Changes or modifications not expressly approved by the party responsi-
ble for compliance could void the user’s authority to operate the equip-
ment.
FCC RF exposure Information 
This device complies with the FCC RF exposure requirements.
This device complies with Part 15 of the FCC Rules and RSS-210. Oper-
ation is subject to the following two conditions: (1) this device may not
cause harmful interference, and (2) this device must accept any interfer-
ence received, including interference that may cause undesired opera-
tion.
For vehicles sold in Canada
Operation is subject to the following two conditions: (1) this device may
not cause interference, and (2) this device must accept any interference,
including interference that may cause undesired operation of the device.

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2-5. Driving information
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When driving
PRIUS_U (OM47668U) U.S.A.
CAUTION
■
Driving with tire chains
Observe the following precautions to reduce the risk of accidents. 
Failing to do so may result in the vehicle being unable to be driven safely,
and may cause death or serious injury.
● Do not drive in excess of the speed limit specified for the tire chains being
used, or 30 mph (50 km/h), whichever is lower.
● Avoid driving on bumpy road surfaces or over potholes.
● Avoid sudden turns and braking, as use of chains may adversely affect
vehicle handling.
● Slow down sufficiently before entering a curve to ensure that vehicle con-
trol is maintained.
NOTICE
■Repairing or replacing snow tires
Request repairs of and obtain replacement snow tires from Toyota dealers. 
This is because the removal and attachment of snow tires affects the opera-
tion of the tire pressure warning valves and transmitters.
■ Fitting tire chains
The tire pressure warning valves and transmitters may not function correctly
when tire chains are fitted.

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3-2. Using the audio system
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Interior features
PRIUS_U (OM47668U) U.S.A.
CAUTION
■
For vehicles sold in the U.S.A.
● Part 15 of the FCC Rules
FCC Warning: 
Any unauthorized changes or modifications to this equipment will void the
user’s authority to operate this device.
● Laser products
• Do not take this unit apart or attempt to make any changes yourself. 
This is an intricate unit that uses a laser pickup to retrieve information
from the surface of compact discs. The laser is carefully shielded so
that its rays remain inside the cabinet. Therefore, never try to disas-
semble the player or alter any of its parts since you may be exposed to
laser rays and dangerous voltages.
• This product utilizes a laser. 
Use of controls or adjustments or performance of procedures other
than those specified herein may result in hazardous radiation expo-
sure.
NOTICE
■ To prevent 12 volt battery discharge
Do not leave the audio system on longer than necessary with the hybrid sys-
tem is not operating.
■ To avoid damaging the audio system
Take care not to spill drinks or other fluids over the audio system.