2017 SUBARU LEGACY Driving Assist Manual

Pre-Collision Braking System
30
Pressing and holding the Pre-Collision Braking System OFF switch for approximately 2 sec-
onds (or longer) turns off the Pre-Collision Braking System (including Pre-Collision Brake
Assist). When 1 short beep sound emits, this control is turned off and the Pre-Collision
Braking System OFF indicator light on the instrument panel illuminates.
To turn the control back on, press and hold the Pre-Collision Braking System OFF switch for
approximately 2 seconds or longer again. When this control is turned on, the Pre-Collision
Braking System OFF indicator light turns off.
Turning off the Pre-Collision Braking System
NOTE
xWhen the Pre-Collision Braking System is turned off, the Pre-Collision
Throttle Management Control function is also turned off.
x Even when the Pre-Collision Braking System is turned off, if the ignition
switch is turned off and the engine is then restarted, the Pre-Collision
Braking System will be turned on. The system default setting when the
vehicle is restarted in “ON”.
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Pre-Collision Braking System
31
■Pre-Collision Braking System OFF indicator light
This indicator light illuminates when the igni-
tion switch is turned to the ON position, and
remains illuminated for approximately 7 sec-
onds after the engine starts. It turns on when
the Pre-Collision Braking System is turned off.
It also illuminates under the following condi-
tions.
x When the EyeSight system has a malfunc-
tion
Ÿ Refer to page 86.
x When the EyeSight system has stopped
temporarily
Ÿ Refer to page 87.
NOTE
When the Pre-Collision Braking System OFF indicator light is turned on, the
Pre-Collision Braking System (including the Pre-Collision Braking Assist func-
tion) does not operate.
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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.

Adaptive Cruise Control
33
Continued on next pageŸ
xAdaptive Cruise Control is designed for use on expressways, freeways, toll
roads, interstate highways and similar limited access roads. It is not intended
to be used in city traffic. In the following conditions, do not use Adaptive
Cruise Control. Doing so may result in an accident.
- Ordinary roads (roads other than those mentioned above) Depending on the driving environment (complexity of roads and other fac-
tors), the system may not be able to perform as the traffic conditions
require, and that may result in an accident.
- Roads with sharp curves or winding roads
- Frozen roads, snow-covered roads or other slippery road surfaces
- The tires may spin, causing loss of control of the vehicle.
- Traffic conditions when frequent acceleration and deceleration make it diffi- cult to maintain the following distance
It may not be possible for the system to perform as the traffic conditions
require.
- Steep downhill grades The set vehicle speed may be exceeded.
- On a steep continuous downhill grade The brakes may overheat.
- Roads and overpasses with repeated steep uphill and downhill grades Detection of the vehicle in front may be lost, or the road surface may be
detected instead of the vehicle in front, making correct control impossible.
- When entering a sharp curve into an interchange or junction, or a service area, parking area, toll booth or other facilities
Detection of the vehicle in front may not be possible.
- 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
Detection of the vehicle in front may be lost, or water or other substances
may be incorrectly detected instead, making correct control impossible.
- When there is snow, frost, dirt or dust on the windshield or it is clouded
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Adaptive Cruise Control
34
ŸContinued from previous page
- When water droplets from rain or the window washer, or dirt has not
been fully wiped off the windshield
It may not be possible to detect the vehicle in front, making correct con-
trol impossible.
- When the stereo cameras’ field of view is obstructed (for example by a canoe on the roof of the vehicle)
x The stereo cameras may have difficulty detecting the following objects or
conditions. Operate the brake pedal and take other actions as necessary.
- Vehicles at significantly different speeds (vehicles driving slowly, stopped or oncoming vehicles, etc.)
- Vehicles cutting into your lane
- Motorcycles, bicycles, pedestrians and animals, etc.
- When light is poor in the evening or early morning
- When driving at night or in a tunnel without the headlights on
- When driving at night or in a tunnel when there is a vehicle in front that does not have its taillights on
- When affected by strong light from the front (sunlight or headlight high beams, etc.)
- Vehicles in front that have a rear aspect that is low,
small or irregular (the sys-
tem may recognize
another part of the vehicle
and will determine opera-
tion from that)
xAn empty truck or trailer
that has no cargo in the
cargo bed being affected
by wind
x Vehicles that have cargo
protruding from their
back ends
x Non-standard shaped vehicles (vehicle transporters or vehicles with a
sidecar fitted, etc.)
x Vehicles that are low
- Objects that are located close to the bumper of your vehicle
x When you do not want to use Adaptive Cruise Control, be sure to turn the
(CRUISE) switch off. If the switch is left on, cruise control may be
accidentally engaged, possibly resulting in an accident.
x Before using Adaptive Cruise Control, be sure to fully verify the safety of
the vehicle occupants and the area around the vehicle. Never operate the
cruise control from outside the vehicle.
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Adaptive Cruise Control
35
Continued on next pageŸ
Detection of the vehicle in front by the EyeSight stereo cameras
xUnder the following road conditions or conditions of your vehicle, detection
of the vehicle in front may not be possible. Vehicles in neighboring traffic
lanes or roadside objects may also be incorrectly detected. Under condi-
tions such as these, do not use Adaptive Cruise Control. If cruise control is
currently in use, operate the brake pedal and take other action as neces-
sary.
- When tracking begins from a short following distance,
such as when the vehicle
in front is a vehicle that cut
into your lane
- When driving on curved roads, at the start and end
of a curve and on roads
with continuous curves
(These conditions make it
difficult for the system to
detect vehicles because
they are outside the
detectable area.)
- When driving on an on- ramp or off-ramp to a free-
way, highway, or other
restricted access road
(EyeSight Adaptive Cruise Control is not designed for use in this kind of
driving environment.)
- When driving in an urban, or suburban environment (Adaptive Cruise Control is not appropriate for use in these driving areas. Adaptive Cruise
Control should only be used on limited-access highways.)
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Adaptive Cruise Control
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ŸContinued from previous page
- When the vehicle in front is
not directly ahead of your
vehicle and is shifted to
one side
- When there is an obstacle at the side of the road
- When the relative speed difference compared to the
vehicle in front is large
- When a vehicle cuts into your lane in front of you
- When the distance between vehicles is extremely short
- When your vehicle is drift-
ing within the lane
- When driving on a bumpy or unpaved road surface
- When driving on a road with extremely narrow lanes, such as when traffic restrictions are in
effect or in areas where construction work is taking place
- When normal driving has become compromised due to an accident or malfunction
- When extremely heavy cargo is loaded in the cargo area, rear seat or
trunk of your vehicle
x There are limits to the capabilities of Adaptive Cruise Control. Even when
the vehicle in front is detected, the system may not be able to decelerate in
time in cases such as when the difference in speeds is large or when the
vehicle in front decelerates suddenly. Operate the brake pedal and decel-
erate as necessary.
x If the buzzer sounds frequently, do not use Adaptive Cruise Control.
x Even when the following distance is short, the “brake more” warning may
not activate in the following cases.
- When the relative speed difference compared to the vehicle in front is small (the two vehicles are traveling at almost the same speed)
- When the vehicle in front is traveling faster than your vehicle (the follow-
ing distance is gradually increasing)
- When another vehicle cuts into your lane very close to your vehicle
- When the vehicle in front decelerated suddenly
- When there are repeated uphill and downhill grades
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Adaptive Cruise Control
37
CAUTION
xAfter Adaptive Cruise Control has started, it maintains control continuously
according to the behavior of the vehicle in front. When your vehicle comes
to a stop if the vehicle in front has stopped, the stay-stopped function is
engaged. However, if the EyeSight stereo cameras lost detection of the
vehicle in front, the system may not stop your vehicle. Operate the brake
pedal and maintain the correct following distance as necessary. Be aware
that the EyeSight system has difficulty detecting objects or vehicles that
have a relative speed in comparison to your vehicle. Therefore, if the
EyeSight system loses detection just as you are approaching a line of
stopped cars, for example - you will have to brake manually.
x There is no possibility that the vehicle will automatically begin moving from
a stay-stopped condition without operation from the driver.
x If the conditions for automatically canceling cruise control (
Ÿ refer to page
49) are met while the vehicle is stay-stopped, Adaptive Cruise Control is
canceled and for safety reasons, the electronic parking brake is automati-
cally applied.
x Braking may not be sufficient depending on the following conditions. Oper-
ate the brake pedal and decelerate as necessary.
- Vehicle conditions (amount of load, number of occupants, etc.)
- Road conditions (grade, slipperiness, shape, bumps, etc.)
- Vehicle maintenance status (brake systems, tire wear, air pressure, tem- porary spare tire is being used, etc.)
- When the brakes are cold. (For example, just after the engine is started or when the outside temperature is low.)
- For a short period of time when driving after the engine is started until the engine has warmed-up
- When the brakes are overheated on downhill grades (braking effective- ness may be reduced)
- When driving in rain or after washing the vehicle (the brakes may become wet and braking effectiveness may be reduced)
- When towing a trailer or another vehicle, etc.