2017 SUBARU LEGACY lane assist

About EyeSight
18
■ (CRUISE) switch
xSwitches cruise control* on/off.
x When this switch is pressed “ ” or “ ” appears on the EyeSight display area in the
multi information display. This indicates that the main cruise control is turned on.
Ÿ Refer to pages 38 and 76.
x Can be used to cancel the cruise control.
Ÿ Refer to pages 48 and 81.
* Adaptive Cruise Control and Conventional Cruise Control
■ RES/SET switch
●
SET/-
x Can be used to set cruise control*.
x Can be used to reduce the set vehicle speed (when cruise control* is currently set).
Ÿ Refer to pages 39 and 43 (for Adaptive Cruise Control).
Ÿ Refer to pages 78 and 80 (for Conventional Cruise Control).
●RES/+
xAfter cruise control* is canceled, this switch can be used to resume the cruise control
function at the vehicle speed that was previously set.
x Can be used to increase set vehicle speed (when cruise control
* is currently set).
Ÿ Refer to pages 42 and 51 (for Adaptive Cruise Control).
Ÿ Refer to pages 79 and 84 (for Conventional Cruise Control).
* Adaptive Cruise Control and Conventional Cruise Control
■/(Following distance setting) switch
x Can be used to switch the set following distance in 4 stages: (only when Adaptive Cruise
Control is on).
Ÿ Refer to page 45.
x When the (CRUISE) switch is on, press and hold this switch for approximately 2
seconds or longer to select Adaptive Cruise Control or Conventional Cruise Control.
■ (Lane Keep Assist) switch
Switches Lane Keep Assist on/off.
Ÿ Refer to page 58.

32
Adaptive Cruise Control
Adaptive Cruise Control is a driving support system intended to allow more comfortable driving on
expressways, freeways and interstate highways. The vehicle in front in the same traffic lane is
detected by means of the stereo cameras, and your vehicle tracks the vehicle in front (up to the
maximum speed of the set vehicle speed) while automatically maintaining a following distance that
corresponds to the speed of the vehicle in front. Through operation of the electronic parking brake,
the system uses the vehicle’s conventional braking system to stop your vehicle when the vehicle
in front is stopped. The vehicle is capable of being controlled at a speed between approximately 0
and 90 MPH (145 km/h). Please remember that you should not exceed posted speed limits.
WARNING
xThis system does not provide the driver with an automatic driving function
that handles all traffic conditions.
x Do not rely excessively on Adaptive Cruise Control. This system is not intended
to assist in driving when the driver is not paying full attention to what is ahead of
him/her due to distractions or a lack of concentration while driving, or under
conditions of poor visibility. It is not intended to prevent rear-end collisions.
Strive for safe driving at all times. Always maintain a safe following distance
behind the vehicle in front of you, pay attention to your surroundings and the
driving conditions, and operate the brake pedal and take other action as neces-
sary.
x Set the set vehicle speed within a range that is appropriate to the road con-
ditions and surrounding environment.
x Before using the system, perform a daily inspection and verify that there
are no malfunctions of the tires or brakes.
Ÿ Refer to the separate “Warranty and Maintenance Booklet”.
x The system may not operate correctly under the conditions listed below.
When these conditions occur, do not use Adaptive Cruise Control.
- The tire pressure is not correct.
*1
- The temporary spare tire is installed.*1
- Tires that are unevenly worn or tires with uneven wear patterns are installed.*1
- Tires that are the wrong size are installed.*1
- Flat tires have been fixed temporarily with a tire repair kit.
- The suspension has been modified (including a genuine SUBARU sus-pension that has been modified).
- Any object that disturbs the stereo cameras’ view is installed on the vehicle.
- The headlights are dirty or they have snow and ice or dirt on them. (Objects are not correctly illuminated and are difficult to detect.)
- The optical axes are not aligned correctly. (Objects are not correctly illu- minated and are difficult to detect.)
- The lights including headlights and fog lamps have been modified.
- Vehicle operation has become compromised due to an accident or malfunction.
- The brake system warning light is illuminated in red.
- A heavy cargo is loaded onto or inside the vehicle.
- The maximum number of occupants is exceeded.
- There is something wrong with the combination meter; such as when the lights do not illuminate, the beeps do not sound, the display is different
from when it is normal, etc.
*2
*1: The wheels and tires have functions that are critically important. Be
sure to use the correct ones. For details, refer to the Owner’s Manual
for your vehicle.
*2: For details about the combination meter, refer to the Owner’s Manual for your vehicle.

54
Lane Keep Assist
The stereo cameras detect lane markings
(including Botts’ dots) of the lane and the sys-
tem assists the steering operation by working
with the electric power steering to help keep
your vehicle in its lane when driving on
expressways, freeways and interstate high-
ways.
WARNING
Lane Keep Assist is not an automatic driving system.
Do not overestimate the capabilities of Lane Keep Assist. It is not a sys-
tem to assist inattentive driving or meant to permit driving without hold-
ing the steering wheel. Make sure to grip the steering wheel while
driving. To drive safely, check the distance from the vehicle in front or
from a vehicle driving in parallel with your vehicle, the surrounding con-
ditions and the surrounding environment while driving.
If you feel that the level of control and timing by the system are different from
your own driving style, the system may not support safe driving. Do not use
Lane Keep Assist.
Lane Keep Assist does not always operate under all situations. If you rely
only on the Lane Keep Assist to stay in a lane, it may cause an accident such
as a collision with an obstacle beside your lane or with a vehicle driving in an
adjacent lane.x Check that there are no problems with the tires and brakes during a daily
inspection before using the system.
Ÿ Refer to “Warranty and Maintenance Booklet”.
x The system may not operate properly under the following conditions. Do
not use Lane Keep Assist.
- The air pressure of tires is not to specification.
*1
- Tires that are unevenly worn or tires with uneven wear patterns are installed.*1
- Tires that are the wrong size are installed.*1
- The wheel balance is abnormal (e.g., the balance weight is removed ormisaligned.)*1
- The wheel alignment is out of the specified value.*1
- Flat tires have been fixed temporarily with a tire repair kit.
- The suspension has been modified (including genuine SUBARU parts).
S02069
Lane
markings

Lane Keep Assist
55
Continued on next pageŸ
- Any object that disturbs the stereo cameras’ view is installed on the vehi-
cle.
- Tire chains are installed.
- When you feel an abnormal vibration in the steering wheel or feel the steering wheel is heavier than usual.
- The steering wheel has been replaced with parts other than genuine SUBARU parts.
- The headlights are dirty or they have snow, ice or dirt on them. (Objects are not adequately illuminated and are difficult to detect.)
- The headlights are not aligned correctly. (Objects are not adequately illu- minated and are difficult to detect.)
- The headlights and fog lamps, and other lights, have been modified.
- Vehicle operation has become compromised due to an accident or mal- function.
- The brake system warning light (red) is illuminated.
- A heavy cargo is loaded onto or inside the vehicle.
- The maximum number of occupants is exceeded.
- Your vehicle is towing a vehicle, etc.
- There is something wrong with the combination meter. For example, an indicator light or a warning light in the combination meter does not prop-
erly turn on or off, a beep does not sound, or the indication on the liquid-
crystal display is different from when it is normal.
*2
*1: The wheels and tires have critically important functions. Be sure to
use the appropriate ones.
For details, refer to the Owner’s Manual for your vehicle.
*2: For details about the functions and operations of the combination meter, refer to the Owner’s Manual for your vehicle.
x Lane Keep Assist is designed for use on expressways, freeways, toll
roads, interstate highways and similar limited access roads. In the follow-
ing conditions, do not use Lane Keep Assist. Doing so may result in an
accident.
- Ordinary roads (roads other than those mentioned above)
- Roads with sharp curves
- Roads with lane restric- tions or tentative lanes due
to construction work, etc.
- Old lane markings remain.
- Snow, puddles or snow melting agents remain on
the road surface.
- Cracks or constructed traces remain on the road
surface.
S02059

Lane Keep Assist
56
ŸContinued from previous page
- Frozen roads, snow-covered roads or other slippery road surfaces
The tires may spin, causing loss of control of the vehicle.
- When entering a sharp curve into an interchange or junction, or a service area, parking area, toll booth or other facilities.
- When there are changes in brightness, such as at a tunnel entrance or exit.
- When visibility is poor due to sand, smoke or water vapor blowing in the wind, or when the vehicle in front or oncoming traffic causes water,
snow, dirt or dust to obscure the view.
- When there is snow, frost, dirt or dust on the windshield or it is clouded.
- When water droplets from rain or dirt have not been fully wiped off on the windshield.
It may not be possible to detect the lane, making correct control impossi-
ble.
- When the stereo cameras’ field of view is obstructed (for example by a canoe on the roof of the vehicle).
- The stereo cameras may have difficulty detecting the objects under the following conditions and the system may not operate properly.
- When driving at night or in a tunnel without the headlights on.
- When light is poor in the evening or early morning.
- In bad weather (for example, rain or snow)
- The distance between your vehicle and the vehicle in front is short, mak- ing it difficult to detect lane markings.
- When a vehicle intruded from an adjacent lane or the vehicle in front changed lanes.
- The shape of a curve in the road suddenly changes.
- Shadows of guardrails or similar objects are overlapped on the lane markings.
- When your vehicle is exposed to a strong light from the front (backlight from the sun, headlights, etc.).
- The width of a lane is narrow.
- The stereo cameras may have difficulty detecting the lane due to the per- formance of the cameras.
xThere are no lane markings or they are very worn.
x The lane markings are painted in yellow.
x It is difficult to detect lane markings because they are similar in color to
the road surface.
x The lane markings are drawn in double.
x The width of lane markings is narrow.
x The indicated lines for the area are touched to walls and poles.
- The shape of lane markings suddenly changes (entrance/exit of a curve, crank and S-shaped road, etc.).
- There is curb or side wall in the road shoulder.
- The brightness changes such as when you drive under an overpass.

Lane Keep Assist
57
CAUTION
xThe performance of Lane Keep Assist may not be optimal under the following
conditions. In addition, Lane Keep Assist may not operate or the operation
may be canceled.
- Immediately after the weight of your vehicle changes radically
- Immediately after the replacement of a tire or the adjustment of tire pres- sure
- Immediately after the adjustment, repair or replacement of cameras or related components
- Immediately after the repair or replacement of the suspension or steering system
- A winter tire or a tire other than a genuine SUBARU tire is used.
- The vehicle is in a crosswind.
- The road grade abruptly changes (uphill or downhill).
- The grade of the crossing direction in a road is large or changes abruptly.
- Unevenness, winding and joint of a road surface
- The acceleration/deceleration is high.
- Immediately after starting the engine when the outside temperature is low.
- The outside temperature is high.
x When you do not use Lane Keep Assist, make sure to turn off the (Lane
Keep Assist) switch. If you turn it on, the function may operate unexpectedly,
causing an accident.
x If you turn on the (Lane Keep Assist) switch, the operation power of
electric power steering may change.

Lane Keep Assist
58
The system detects lane markings in order to help prevent departure from the lane. If you
drive on expressways, freeways or interstate highways at speeds above approximately 40
MPH (65 km/h) and the vehicle is about to depart from the lane, the system assists the
steering operation by turning it to the direction that will help prevent the lane departure.
■How to use Lane Departure Prevention Function
Press the (Lane Keep Assist) switch.
Lane Keep Assist is turned on, and “ ” (Lane Keep Assist indicator) (white) is displayed
on the EyeSight display area of the multi information display.
Lane Departure Prevention Function
S02043
There is a strong
possibility of lane
departure. There is a
possibility of lane
departure.
S01994milesA
MPG
S02044
Lane Keep
Assist indicator
(white)

Lane Keep Assist
59
Press the (Lane Keep Assist) switch once again to turn it off, and “ ” (Lane Keep
Assist indicator) is turned off on the EyeSight display area.
The Lane Departure Prevention Function goes into the standby status, and the lane indica-
tor illuminates when all of the following conditions are met.x The vehicle speed is between approximately 40 MPH (65 km/h) and 90 MPH (145 km/h).
x The system is detecting the lane markings.
x The driver is holding the steering wheel.
x When driving on a road that has a lane width that is between approximately 10 ft (3 m)
and 15 ft (4.5 m).
x When driving on a straight road or gentle curve.
x When driving near the center of a lane.
When the vehicle is about to depart from the lane, Lane Departure Prevention Function
starts to operate and “ ” (Lane Keep Assist indicator) illuminates in green while it is
operating.
NOTE
x If you just lightly put your hands on the steering wheel for a certain period
of time or if you do not operate the steering wheel, the function will auto-
matically be canceled. (“ ” Lane Keep Assist indicator) illuminates in
white again.)
x Lane Departure Prevention Function operates when the system deter-
mines that the vehicle will depart from the lane if you continue to drive in
the same manner. Therefore, it operates at an earlier timing than Lane
Departure Warning (
Ÿ Refer to page 68.) (it may depend on the surround-
ing environment and road condition).
x The lane indicator in the standby status and in operation may illuminate
only on the left side or right side.
milesA
MPG
milesA
MPG
milesA
MPG
S02045
Lane Keep
Assist
indicator
(white)
Turned on Standby status In operation
(white) (green)