2010 TOYOTA PRIUS warning

226 2-4. Using other driving systems
PRIUS_U (OM47668U) U.S.A.
■Automatic cancelation of constant speed control
The cruise control will stop maintaining the vehicle speed in the following sit-
uations:
● Actual vehicle speed is more than approximately 10 mph (16 km/h)
below the set vehicle speed. 
At this time, the memorized set speed is not retained.
● Vehicle speed falls below 25 mph (40 km/h).
● Enhanced VSC is activated.
■ Vehicle-to-vehicle distance settings
Select a distance from the table below. Note that the distances shown corre-
spond to a vehicle speed of 50 mph (80 km/h). Vehicle-to-vehicle distance
increases/decreases in accordance with vehicle speed.
■ Radar sensor and grille cover
■ Warning lights, messages and buzze rs for dynamic radar cruise con-
trol
Warning lights, messages and buzzers are used to indicate a system mal-
function or to inform the driver of the need for caution while driving. 
( P. 508)
Distance optionsVehicle-to-vehicle distance
Long Approximately 160 ft. (50 m)
Medium Approximately 130 ft. (40 m)
Short Approximately 100 ft. (30 m)
Always keep the sensor and grille cover
clean to ensure that the vehicle-to-vehi-
cle distance control operates properly.
(Some obstructions, such as snow, ice
and plastic objects, cannot be detected
by the obstruction sensor.)
Dynamic radar cruise control is can-
celed if an obstruction is detected.
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When driving
PRIUS_U (OM47668U) U.S.A.
■Approach warning
In the following instances, there is a possibility that the warnings will not
occur:
● When the speed of the vehicle ahead matches or exceeds your vehicle
speed
● When the vehicle ahead is traveling at an extremely slow speed
● Immediately after the cruise control speed was set
● At the instant the accelerator is applied
■ 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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When driving
PRIUS_U (OM47668U) U.S.A.
CAUTION
■Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.
Doing so may result in inappropriate speed control and could cause an acci-
dent resulting in death or serious injury.
● In heavy traffic
● On roads with sharp bends
● On winding roads
● On slippery roads, such as those covered with rain, ice and snow
● On steep downhills, or where there are sudden changes between sharp up
and down gradients 
Vehicle speed may exceed the set speed when driving down a steep hill.
● At entrances to expressways
● When weather conditions are bad enough that they may prevent the sen-
sors from functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
● When an approach warning buzzer can be heard often
■ When the sensor may not be corr ectly detecting the vehicle ahead
Apply the brakes as necessary when any of the following types of vehicles
are in front of you. 
As the sensor may not be able to correctly detect these types of vehicles,
the approach warning ( P. 227) will not be activated, and a fatal or serious
accident may result.
● Vehicles that cut in suddenly
● Vehicles traveling at low speeds
● Vehicles that are not moving
● Vehicles with small rear ends (trailers with no load on board etc.)
● Motorcycles traveling in the same lane

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PRIUS_U (OM47668U) U.S.A.
LKA (Lane-Keeping Assist)
: If equipped
While driving on a freeway or motor highway that has lane markings,
this system recognizes the lanes using a camera as a sensor to
assist the driver with staying in the lane. The LKA system has two
functions.
■ Lane departure warning function
If the system judges that the vehicle may deviate from its lane, it
alerts the driver using rapid be eping, indications on the multi-
information display, and a sensory warning
* given via the steer-
ing wheel.
*: A slight steering torque is applied for a short period of time in
the direction of the center of the lane.
■ Lane keeping assist function
This function will be active when the vehicle-to-vehicle distance
control mode of the cruise control ( P. 218) is set with vehicle
speed above approx. 50 mph (approx. 75 km/h) and while the
lane departure warning function is active. When the lane keep-
ing assist function is active, a slight steering torque will be
applied, to help the driver mainta in the vehicle inside the lane.

236 2-4. Using other driving systems
PRIUS_U (OM47668U) U.S.A.
■Turning the LKA system on
The lane departure warning functi on and lane keeping assist
function will be automatically activated depending on the recog-
nition condition of lane marki ngs, vehicle speed and the setting
of radar cruise control (vehic le-to-vehicle distance control
mode).
Press the “LKA” switch to acti-
vate the system.
Press the switch again to turn
the LKA system off.
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When driving
PRIUS_U (OM47668U) U.S.A.
■Operating conditions for each function
*1: Vehicle speed is between about 30 and 124 mph (50 and 200 km/h).
*2: Vehicle speed is between about 50 and 112 mph (75 and 180 km/h).
“LKA”
switchCruise control
(vehicle-to-vehicle
distance control mode)Lane departure warning
function
*1
Lane keeping assist
function
*2
On
OffAvailableNot available
On
(While cruising in vehi- cle-to-vehicle distance control mode with the set vehicle speed approx. 45 mph
[approx. 70 km/h] or less)
AvailableNot available
On
(While cruising in vehi- cle-to-vehicle distance control mode with the set vehicle speed approx. 50 mph
[approx. 75 km/h] or more)
AvailableAvailable

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.)