2010 SUBARU LEGACY brake

7-24Starting and operating
a loss of control of the vehicle. Keep
driving straight ahead while gradually
reducing speed. Then slowly pull off the
road to a safe place. &Brake system
! Two separate circuits
Your vehicle has a dual circuit brake
system. Each circuit works diagonally
across the vehicle. If one circuit of the
brake system should fail, the other half of
the system still works. If one circuit fails,
the brake pedal will go down much closer
to the floor than usual and you will need to
press it down much harder. And a much
longer distance will be needed to stop thevehicle. ! Brake booster
The brake booster uses engine manifold
vacuum to assist braking force. Do not
turn off the engine while driving because
that will turn off the brake booster, result-
ing in poor braking power.
The brakes will continue to work even
when the brake booster completely stops
functioning. If this happens, however, you
will have to depress the pedal much
harder than normal and the braking dis-
tance will increase. !
Brake assist system
WARNING
Do not be overconfident about the
brake assist. It is not a system that
brings more braking ability to the
vehicle beyond its braking capabil-
ity. Always use the utmost care
when driving regarding vehicle
speed and safe distance.
CAUTION
When you need to brake suddenly,
continue depressing the brake pedal
strongly to bring the effect of the
brake assist.
Brake assist is a driver assistance system.
It assists the brake power when the driver
cannot depress the brake pedal strongly
and the brake power is insufficient.
Brake assist generates the brake power
according to the speed at which the driver
depresses the brake pedal.
NOTE
When you depress the brake pedal
strongly or suddenly, the following
phenomena occur. However, even
though these occur, they do not indi- cate any malfunctions, and the brake
assist system is operating properly. .
You might feel that the brake pedal
is applied by lighter force and gener-
ates a greater braking force.. You might hear the sound of ABS
operating from the engine compart-ment.
& Disc brake pad wear warning indicators
The disc brake pad wear warning indica-
tors on the disc brakes give a warning
noise when the brake pads are worn.
If a squeaking or scraping noise is heard
from the disc brakes while braking, im-
mediately have your vehicle inspected by
the nearest SUBARU dealer.

ABS (Anti-lock Brake Sys- tem)
WARNING
Always use the utmost care in driving –overconfidence because
youaredrivingwithanABS
equipped vehicle could easily lead
to a serious accident.
CAUTION
. The ABS system does not always
decrease stopping distance. You
should always maintain a safe
following distance from othervehicles.
. When driving on badly surfaced
roads, gravel roads, icy road, or
over deep newly fallen snow,
stopping distances may be long-
er for a vehicle with the ABS
system than one without. When
driving under these conditions,
therefore, reduce your speed and
leave ample distance from othervehicles.
. When you feel the ABS system
operating, you should maintain constant brake pedal pressure.
Do not pump the brake pedal
since doing so may defeat the
operation of the ABS system.
The ABS system prevents the lock-up of
wheels which may occur during sudden
braking or braking on slippery road sur-
faces. This helps prevent the loss of
steering control and directional stability
caused by wheel lock-up.
When the ABS system is operating, you
may hear a chattering noise or feel a slight
vibration in the brake pedal. This is normal
when the ABS operates.
The ABS system will not operate when the
vehicle speed is below approximately 6
mph (10 km/h).
& ABS system self-check
You may feel a slight shock in the brake
pedal and hear the operating sound of
ABS from the engine compartment just
after the vehicle is started. This is caused
by an automatic functional test of the ABS
system being carried out and does not
indicate any abnormal condition. &
ABS warning light
The ABS warning light illuminates when
the ignition switch is turned to the “ON ”
position and turns off after approximately 2seconds.
This is an indication that the ABS system
is working properly.
CAUTION
If the warning light behaves as
follows, the ABS system may not
be working properly.
When the warning light is on, the
ABS function shuts down; however,
the conventional brake system con-
tinues to operate normally. . The warning light does not illu- Starting and operating
7-25
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7-26Starting and operating
minate when the ignition switch
is turned to the “ON ”position.
. The warning light illuminates
when the ignition switch is
turned to the “ON ”position, but
it does not turn off even when the
vehicle speed exceeds approxi-
mately 8 mph (12 km/h).
. The warning light illuminates dur-
ing driving.
If these occur, have the ABS system
repaired at the first available oppor-
tunity by your SUBARU dealer.
NOTE
If the warning light behavior is as
described in the following, the ABS
system may be considered normal. . The warning light illuminates right
after the engine is started but turns off
immediately, remaining off.. The warning light remains illumi-
nated after the engine has been started,
but it turns off when the vehicle speed
reaches approximately 8 mph (12km/h).. The warning light illuminates during
driving, but it turns off immediately and
remains off.
When driving with an insufficient battery voltage such as when the engine is jump
started, the ABS warning light may illumi-
nate. This is due to the low battery voltage
and does not indicate a malfunction.
When the battery becomes fully charged,
the light will turn off.
Electronic Brake Force Dis-
tribution (EBD) system
The EBD system maximizes the effective-
ness of the brakes by allowing the rear
brakes to supply a greater proportion of
the braking force. It functions by adjusting
the distribution of braking force to the rear
wheels in accordance with the vehicle
’s
loading condition and speed.
The EBD system is an integral part of the
ABS system and uses some of the ABSsystem ’s components to perform its func-
tion of optimizing the distribution of brak-
ing force. If any of the ABS components
used by the EBD function fails, the EBD
system also stops working.
When the EBD system is operating, you
may hear a chattering noise or feel a slight
vibration in the brake pedal. This is normal
and does not indicate a malfunction.

&Steps to take if EBD system malfunctions
If a malfunction occurs in the EBD system,
the system stops working and the brake
system warning light and ABS warning
light illuminate simultaneously.
The EBD system may be malfunctioning if
the brake system warning light and ABS
warning light illuminate simultaneously
during driving.
Even if the EBD system fails, the conven-
tional braking system will still function.
However, the rear wheels will be more
prone to locking when the brakes are
applied harder than usual and the vehi-cle’s motion may therefore become some-
what harder to control.
If the brake system warning light and ABS warning light illuminate simultaneously,
take the following steps.
1. Stop the vehicle in the nearest safe,
flat place.
2. Shut down the engine, then restart it.
3. Release the parking brake. If both
warning lights turn off, the EBD system
may be malfunctioning.
Drive carefully to the nearest SUBARU
dealer and have the system inspected.
4. If both warning lights illuminate again
and remain illuminated after the engine
has been restarted, shut down the engine
again, apply the parking brake, and check
the brake fluid level.
5. If the brake fluid level is not below the “
MIN ”mark, the EBD system may be
faulty. Drive carefully to the nearest
SUBARU dealer and have the systeminspected.
6. If the brake fluid level is below the “ MIN ”mark, DO NOT drive the vehicle.
Instead, have the vehicle towed to the
nearest SUBARU dealer for repair.
WARNING
. Driving with the brake system
warning light on is dangerous.
This indicates your brake system
may not be working properly. If the light remains on, have the
brakes inspected by a SUBARU
dealer immediately.
. If at all in doubt about whether
the brakes are operating prop-
erly, do not drive the vehicle.
Have your vehicle towed to the
nearest SUBARU dealer for re-
pair. Starting and operating
7-27

NOTE .Slight twitching of the brake pedal
may be felt when the Vehicle Dynamics
Control system operates; a small de-
gree of vehicle or steering wheel shak-
ing may also be noticed in this situa-
tion. These are normal characteristics
of Vehicle Dynamics Control operation
and are no cause for alarm.. When driving off immediately after
starting the engine, a short-lived opera-
tion noise may be noticed coming from
the engine compartment. This noise is
generated as a result of a check being
performed on the Vehicle Dynamics
Control system and is normal.. Depending on the timing of activa-
tion of the brakes, the brake pedal may
seem to jolt when you drive off after
starting the engine. This is a conse-
quence of the Vehicle Dynamics Con-
trol operational check and is normal.. In the circumstances shown in the
following list, the vehicle may be more
unstable than it feels to the driver. The
Vehicle Dynamics Control System may
therefore operate. Such operation does
not indicate a system fault.
–on gravel-covered or rutted
roads – on unfinished roads
– when the vehicle is towing a trailer–
when the vehicle is fitted with
snow tires or winter tires
. Activation of the Vehicle Dynamics
Control system will cause operation of
the steering wheel to feel slightly
different compared to that for normalconditions. . Even if the vehicle is equipped with
a Vehicle Dynamics Control system, it
is important that winter tires be used
when driving on snow-covered or icy
roads. (All four wheels should be fitted
with tires of the same size and brand.) . It is always important to reduce
speed when appro aching a corner,
even if the vehicle is equipped with
Vehicle Dynamics Control. . All four wheels should be fitted with
tires of the same size, type, and brand;
furthermore, the amount of wear
should be the same for all four tires. If
these precautions are not observed
and non-matching tires are used, it is
quite possible that the Vehicle Dy-
namics Control system will be unable
to operate correctly as intended. . Always turn off the engine before
replacing a tire as failure to do so may
render the Vehicle Dynamics Control
system unable to operate correctly. &
Vehicle Dynamics Control
system monitor
! Vehicle Dynamics Control warning
light/Vehicle Dynamics Control op-
eration indicator light
The light illuminates when the ignition
switch is turned to the “ON ”position and
turns off several seconds after the engine
has started. This lighting pattern indicates
that the Vehicle Dynamics Control system
is operating normally. ! Vehicle Dynamics Control warning light
CAUTION
Because the Vehicle Dynamics Con-
trol system controls each brake Starting and operating
7-29
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7-30Starting and operating
through the ABS, whenever the ABS
stops operating due to a malfunc-
tion in that electrical system, the
Vehicle Dynamics Control will also
become unable to control all four
brakes. Thus Vehicle Dynamics
Control system operation halts and
the warning light illuminates.
Although both the Vehicle Dynamics
Control system and the ABS will be
inoperable in this situation, it will
still be possible to stop the vehicle
using normal braking. The Vehicle
Dynamics Control system and the
ABS do not adversely affect opera-
tion of the vehicle in any way when
they are inoperable. However
should such a situation occur, drive
with care and have an authorized
SUBARU dealer carry out an inspec-
tion of those systems at the first
available opportunity.
NOTE . When a malfunction has occurred in
the Vehicle Dynamics Control electrical
system, only the warning light will
illuminate. In such an event, the ABS
will still be operating normally.. The warning light will also illuminate
when a problem occurs with the ABS or
Vehicle Dynamics Control electronic control systems.
The warning light illuminates when the
ignition switch is turned to the
“ON ”
position and turns off several seconds
after the engine has started. This lighting
pattern indicates that the Vehicle Dy-
namics Control system is operating nor-
mally.
The following situations could indicate a
malfunction of the Vehicle Dynamics
Control system. If any of these situations
occur, have an authorized SUBARU deal-
er carry out an inspection of the system at
the first available opportunity. . The warning light does not illuminate
when the ignition switch is turned to the
ON position. . The warning light illuminates while the
vehicle is being driven.
NOTE
When the warning light turns on and off
in the following way, it indicates that
the Vehicle Dynamics Control system
is operating normally. . Although illuminating after the en-
gine has been started, the warning light
quickly turns off and remains off.. The warning light illuminates when
the vehicle is being driven, it then turns
off and remains off. !
Vehicle Dynamics Control operation
indicator light
The indicator light flashes during activa-
tion of the skid suppression function and
during activation of the traction controlfunction.
NOTE . The indicator light may remain illu-
minated for a while after the engine has
been started, especially in cold weath-
er. This occurs because the engine has
not yet warmed up and is completely
normal. The light will turn off when the
engine has reached a suitable operat-
ing temperature.. When an engine problem occurs
and the CHECK ENGINE warning light/
malfunction indicator lamp illuminates,
the indicator light will also illuminate.
The following two situations could indicate
malfunction of the Vehicle Dynamics
Control system. If either of these situa-
tions occurs, have an authorized
SUBARU dealer carry out an inspection
of that system at the first available
opportunity. . The indicator light does not illuminate
when the ignition switch is turned to the
ON position. . The indicator light fails to turn off after
the engine is started, even when several

minutes have passed to allow the engine
to heat up sufficiently. !Vehicle Dynamics Control OFF in-
dicator light
The light illuminates when the ignition
switch is turned to the “ON ”position and
turns off after approximately 2 seconds.
The light illuminates when the Vehicle
Dynamics Control OFF switch is pressed
to deactivate the Vehicle Dynamics Con-
trol system.
The following two situations could indicate
a malfunction of the Vehicle Dynamics
Control system. If either should occur,
have an authorized SUBARU dealer carry
out an inspection of that system at the first
available opportunity. . The indicator light does not illuminate when the ignition switch is turned to the
ON position. .
The indicator light does not turn off
approximately 2 seconds after the ignition
switch has been turned to the ON position.
& Vehicle Dynamics Control
OFF switch
Pressing the switch to deactivate the
Vehicle Dynamics Control system can
facilitate the following operations. .a standing start on a steeply sloping
road with a snowy, gravel-covered, or
otherwise slippery surface . extrication of the vehicle when its
wheels are stuck in mud or deep snow
When the switch is pressed during engine
operation, the Vehicle Dynamics Control OFF indicator light on the combination
meter illuminates. The Vehicle Dynamics
Control system will be deactivated. When
the switch is pressed again to reactivate
the Vehicle Dynamics Control system, the
Vehicle Dynamics Control OFF indicator
light turns off.
You should not deactivate the Vehicle
Dynamics Control system except under
the above-mentioned situations.
CAUTION
The Vehicle Dynamics Control sys-
tem helps prevent unstable vehicle
motion such as skidding using con-
trol of the brakes and engine power.
Do not turn off the Vehicle Dynamics
Control system unless it is abso-
lutely necessary. If you must turn off
the Vehicle Dynamics Control sys-
tem, drive very carefully based on
the road surface condition.
NOTE . When the switch has been pressed
to deactivate the Vehicle Dynamics
Control system, the Vehicle Dynamics
Control system automatically reacti-
vates itself the next time the ignition
switch is turned to the “LOCK ”position
and the engine is restarted. Starting and operating
7-31
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7-32Starting and operating
.If the switch is held down for 10
seconds or longer, the indicator light
turns off, the Vehicle Dynamics Control
system is activated, and the system
ignores any further pressing of the
switch. To make the switch usable
again, turn the ignition switch to the“ LOCK ”position and restart the en-
gine.. Whentheswitchispressedto
deactivate the Vehicle Dynamics Con-
trol system, the vehicle ’s running per-
formance is comparable with that of a
vehicle that does not have a Vehicle
Dynamics Control system. Do not de-
activate the Vehicle Dynamics Control
system except when absolutely neces-
sary.. Even when the Vehicle Dynamics
Control system is deactivated, compo-
nents of the brake control system may
still activate. When the brake control
system is activated, the Vehicle Dy-
namics Control operation indicator
light illuminates. Tire pressure monitoring
system (TPMS) (if equipped)
The tire pressure monitoring system pro-
vides the driver with a warning message
by sending a signal from a sensor that is
installed in each wheel when tire pressure
is severely low.
The tire pressure monitoring system will
activate only when the vehicle is driven at
speeds above 20 mph (32 km/h). Also,
this system may not react immediately to a
sudden drop in tire pressure (for example,
a blow-out caused by running over a
sharp object).
WARNING
If the low tire pressure warning light
illuminates while driving, never
brake suddenly and keep driving
straight ahead while gradually redu-
cing speed. Then slowly pull off the
road to a safe place. Otherwise an
accident involving serious vehicle
damage and serious personal injury
could occur.
Check the pressure for all four tires
and adjust the pressure to the COLD
tire pressure shown on the tire
placard on the door pillar on thedriver ’s side.
Even when the vehicle is driven a
very short distance, the tires get
warm and their pressures increase
accordingly. Be sure to let the tires
cool thoroughly before adjusting
their pressures to the standard
values shown on the tire placard.
Refer to “Tires and wheels ”F 11-35.
The tire pressure monitoring system
does not function when the vehicle
is stationary. After adjusting the tire
pressures, increase the vehicle
speed to at least 20 mph (32 km/h)
to start the TPMS re-checking of the
tire inflation pressures. If the tire
pressures are now above the severe