2012 TOYOTA PRIUS wheel

213
2-1. Driving procedures
2
When driving
Hor n
■After adjusting the steering wheel
Make sure that the steering wheel is securely locked.
The horn may not sound if the steering wheel is not securely locked.
(P. 117)
To sound the horn, press on or
close to the mark.

215
2-2. Instrument cluster
2
When driving
Touch tracer display (if equipped)
When the audio control switches,
climate control switches, “DISP”
button or “TRIP” button of the
steering wheel are touched, the
touch tracer display will appear
in front of the gauges, with the
touched button highlighted to
allow the driver to identify the
button that is being operated.
The button can then be operated
by further presses.
If an audio/navigation system is
used that is not compatible with
the steering switches in this vehi-
cle, the audio switch display may
not operate correctly.

284 2-4. Using other driving systems
CAUTION
■When the sensor may not be correctly 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. 277) 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
■ Conditions under which the vehicle -to-vehicle distance control may
not function correctly
Apply the brakes as necessary in the following conditions as the radar sen-
sor may not be able to correctly detect vehicles ahead, and a fatal or serious
accident may result:
● When water or snow thrown up by the surrounding vehicles hinders the
functioning of the sensor
● When your vehicle is pointing upwards (caused by a heavy load in the lug-
gage compartment etc.)
● When the road curves or when the lanes are narrow
● When steering wheel operation or your position in the lane is unstable
● When the vehicle ahead of you decelerates suddenly

286
2-4. Using other driving systems
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. 270) 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.

289
2-4. Using other
driving systems
2
When driving
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 solid lane lines are shown:
The lane departure warning func-
tion is active.

290 2-4. Using other driving systems
■Temporary cancelation 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.
However, the lane keeping assist function will not resume even after the
brake pedal is released because depressing the brake pedal also can-
cels the dynamic radar cruise control. (Only lane departure warning func-
tion will resume.)
● The vehicle speed deviates from the operating range of the LKA system
functions.
● When the lane lines cannot be recognized while driving.
● The wiper operates continuously.
■ When the lane departure wa rning function is activated
The lane departure warning function will be temporarily canceled and will not
resume until a few seconds elapse after it is activated.

291
2-4. Using other
driving systems
2
When driving
■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.
■ Warning lights and warning messages for LKA
Warning lights and messages are used to indicate a system malfunction or
to inform the driver of the need for caution while driving. ( P. 496, 510)
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.

292 2-4. Using other driving systems
CAUTION
■Turn the LKA off while driving in any of the following conditions
Do not use LKA in any of the following situations.
Otherwise, the system may not function correctly and could result in an acci-
dent.
● When driving with snow tires, snow chains, a spare tire, or similar equip-
ment.
● When driving with non-standard parts or aftermarket equipment installed.
(including modified tires and suspensions, etc.)
● When there are objects or structures along the roadside that might be mis-
interpreted as lane markers. (such as guardrails, curb, reflector posts, etc.)
● When there are wheel ruts, icy trademar ks, etc. or if snow remains on the
road surface.
● When there are shadows on the road r unning parallel with lane markers,
or if a shadow covers the lane markers.
● When there are visible lines on the pavement from road repairs, or if the
remains of old lane markers are still visible on the road.
● When driving on slippery roads, such as those covered with rain, ice or
snow.
● When driving in a lane other than the driving or passing lanes on a freeway
or highway.
● When driving on a road with lane closures due to maintenance, or when
driving in a temporary lane.
● When driving on winding roads or roads that are rough or uneven.