2010 TOYOTA PRIUS lane assist

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PRIUS_U (OM47668U) U.S.A.
2-1. Driving proceduresDriving the vehicle............... 150
Power (ignition) switch ........ 162
EV-Drive Mode.................... 168
Transmission....................... 171
Turn signal lever ................. 178
Parking brake ...................... 179
Horn .................................... 180
2-2. Instrument cluster Gauges and meters ............ 181
Indicators and warning 
lights ................................. 185
Multi-information display ..... 188
2-3. Operating the lights 
and windshield wipers
Headlight switch .................. 206
Fog light switch ................... 209
Windshield wipers 
and washer ....................... 210
Rear window wiper 
and washer ....................... 212
Headlight cleaner switch ..... 213 2-4. Using other driving systems
Cruise control ..................... 214
Dynamic radar 
cruise control .................... 218
Rear view monitor 
system .............................. 231
LKA (Lane-Keeping 
Assist) .............................. 235
Hill-start assist control ........ 243
Driving assist systems ........ 245
Pre-Collision System .......... 249
2-5. Driving information Cargo and luggage ............. 255
Vehicle load limits............... 260
Winter driving tips ............... 261
Trailer towing ...................... 266
Dinghy towing ..................... 267
2When driving

When driving2
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PRIUS_U (OM47668U) U.S.A.
2-1. Driving proceduresDriving the vehicle............ 150
Power (ignition) switch ..... 162
EV-Drive Mode................. 168
Transmission.................... 171
Turn signal lever .............. 178
Parking brake ................... 179
Horn ................................. 180
2-2. Instrument cluster Gauges and meters ......... 181
Indicators and warning 
lights .............................. 185
Multi-information  display............................ 188 2-3. Operating the lights and
windshield wipers
Headlight switch ............... 206
Fog light switch ................ 209
Windshield wipers 
and washer .................... 210
Rear window wiper  and washer .................... 212
Headlight 
cleaner switch ................ 213
2-4. Using other driving systems Cruise control ................... 214
Dynamic radar 
cruise control ................. 218
Rear view monitor 
system ........................... 231
LKA (Lane-Keeping 
Assist) ............................ 235
Hill-start assist control ...... 243
Driving assist systems ..... 245
Pre-Collision System........ 249
2-5. Driving information Cargo and luggage .......... 255
Vehicle load limits ............ 260
Winter driving tips ............ 261
Trailer towing ................... 266
Dinghy towing .................. 267

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2-2. Instrument cluster
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When driving
PRIUS_U (OM47668U) U.S.A.
Switching the display
“TRIP” button
“DISP” button
On vehicles with touch tracer dis-
play, the steering switches opera-
tion status is displayed on the
instrument cluster for confirma-
tion purposes. (P. 182)
●Dynamic radar cruise control display (if equipped) ( P. 218)
Automatically displayed when using dynamic radar cruise control.
● Lane-keeping assist display (if equipped) ( P. 235)
Automatically displayed when using lane-keeping assist.
● Warning messages ( P. 508)
Automatically displayed when a malfunction occurs in one of the vehi-
cle’s systems.

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2-4. Using other driving systems
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When driving
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.
ITO24P132

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