2011 INFINITI EX brakes

PREVIEW FUNCTION (for Intelligent
Cruise Control system equipped
models)
The ICC system with the preview function iden-
tifies the need to apply emergency braking by
sensing the vehicle ahead in the same lane and
the distance to the vehicle ahead and relative
speed from it, it applies the brake pre-pressure
before the driver depresses the brake pedal and
helps improve brake response by reducing
pedal free play.
For more details, see “BRAKE ASSIST” later in
this section.The Distance Control Assist (DCA) system
brakes and moves the accelerator pedal upward
according to the distance from and the relative
speed of the vehicle ahead to help assist the
driver to maintain a following distance.
WARNING
●
Always drive carefully and attentively when
using the Distance Control Assist system.
Read and understand the Owner’s Manual
thoroughly before using the DCA system. To
avoid serious injury or death, do not rely on
the system to prevent accidents or to control
the vehicle’s speed in emergency situations.
Do not use the Distance Control Assist sys-
tem except in appropriate road and traffic
conditions.
● If the vehicle ahead comes to a stop, the
vehicle decelerates to a standstill within the
limitations of the system. The system will
cancel once it judges that the vehicle has
come to a standstill with a warning chime. To
prevent the vehicle from moving, the driver
must depress the brake pedal.
● The DCA system will not apply brake control
while the driver’s foot is on the accelerator
pedal.
PRECAUTIONS ON DISTANCE CONTROL
ASSIST SYSTEM
The system is intended to assist the driver to
keep a following distance from the vehicle
ahead traveling in the same lane and direction.
If the distance sensor
Adetects a slower
moving vehicle ahead, the system will reduce
the vehicle speed to help assist the driver to
maintain a following distance.
The system automatically controls the throttle
and applies the brakes (up to 25% of vehicle
braking power) if necessary.
The detection range of the sensor is approxi-
mately 390 ft (120 m) ahead.
SSD0701
DISTANCE CONTROL ASSIST (DCA) SYSTEM
(if so equipped)
5-54Starting and driving

WARNING
●This system is only an aid to assist the driver
and is not a collision warning or avoidance
device. It is the driver’s responsibility to stay
alert, drive safely and be in control of the
vehicle at all times.
● This system will not adapt automatically to
road conditions. Do not use the system on
roads with sharp curves, or on icy roads, in
heavy rain or in fog.
The distance sensor will not detect the follow-
ing objects:
● Stationary and slow moving vehicles
● Pedestrians or objects in the roadway
● Oncoming vehicles in the same lane
● Motorcycles traveling offset in the travel
lane
WARNING
● As there is a performance limit to the dis-
tance control function, never rely solely on
the Distance Control Assist system. This
system does not correct careless, inatten-
tive or absent-minded driving, or overcome
poor visibility in rain, fog, or other bad
weather. Decelerate the vehicle speed by de-
pressing the brake pedal, depending on the
distance to the vehicle ahead and the sur-
rounding circumstances in order to maintain
a safe distance between vehicles.
● The system may not detect the vehicle in
front of you in certain road or weather condi-
tions. To avoid accidents, never use the Dis-
tance Control Assist system under the fol-
lowing conditions:
– On roads with sharp curves
– On slippery road surfaces such as on ice or snow, etc.
– During bad weather (rain, fog, snow, etc.)
– When strong light (for example, at sun- rise or sunset) is directly shining on the
front of the vehicle
– When rain, snow or dirt adhere to the sys- tem sensor – On steep downhill roads (frequent brak-
ing may result in overheating the brakes)
– On repeated uphill and downhill roads
● Do not use the Distance Control Assist sys-
tem if you are towing a trailer. The system
may not detect a vehicle ahead.
● In some road or traffic conditions, a vehicle
or object can unexpectedly come into the
sensor detection zone and cause automatic
braking. You may need to control the dis-
tance from other vehicles using the accelera-
tor pedal. Always stay alert and avoid using
the DCA system when it is not recommended
in this section.
Starting and driving5-55

DISTANCE CONTROL ASSIST
OPERATION
Always pay attention to the operation of the
vehicle and be ready to manually decelerate to
maintain the proper following distance. The
Distance Control Assist (DCA) system may not
be able to decelerate the vehicle under some
circumstances.
The DCA system uses a sensor
Alocated on
the front of the vehicle to detect vehicles trav-
eling ahead. The sensor generally detects the
signals returned from the reflectors on a vehicle
ahead. Therefore, if the sensor cannot detect
the reflector on the vehicle ahead, the DCA
system may not operate. The following are some conditions in which the
sensor cannot detect the signals:
●
When the reflector of the vehicle ahead is
positioned high on the vehicle (trailer, etc.)
● When the reflector on the vehicle ahead is
missing, damaged or covered
● When the reflector of the vehicle ahead is
covered with dirt, snow and road spray
● When the snow or road spray from traveling
vehicles reduces the sensor’s visibility
● When dense exhaust or other smoke (black
smoke) from vehicles reduces the sensor’s
visibility
● When excessively heavy baggage is loaded
in the rear seat or the luggage room of your
vehicle
The DCA system is designed to automatically
check the sensor’s operation. When the sensor
is covered with dirt or is obstructed, the system
will automatically be canceled. If the sensor is
covered with ice, a transparent or translucent
vinyl bag, etc., the DCA system may not detect
them. In these instances, the Distance Control
Assist (DCA) system may not be able to decel-
erate the vehicle properly. Be sure to check and
clean the sensor regularly. The DCA system is designed to help assist the
driver to maintain a following distance from the
vehicle ahead. The system will decelerate as
necessary and if the vehicle ahead comes to a
stop, the vehicle decelerates to a standstill.
However, the DCA system can only apply up to
25% of the vehicles total braking power. If a
vehicle moves into the traveling lane ahead or if
a vehicle traveling ahead rapidly decelerates,
the distance between vehicles may become
closer because the DCA system cannot deceler-
ate the vehicle quickly enough. If this occurs,
the DCA system will sound a warning chime and
blink the system display to notify the driver to
take necessary action.
See “Approach warning” later in this section.
This system only brakes and moves the accel-
erator pedal upward to help assist the driver to
maintain a following distance from the vehicle
ahead. Acceleration should be operated by the
driver.
The DCA system does not control vehicle speed
or warn you when you approach stationary and
slow moving vehicles. You must pay attention to
vehicle operation to maintain proper distance
from vehicles ahead.
SSD0701
5-56Starting and driving

1. System set display with vehicle ahead
2. System set display without vehicle aheadSystem operation
WARNING
The Distance Control Assist system automati-
cally decelerates your vehicle to help assist the
driver to maintain a following distance from the
vehicle ahead. Manually brake when decelera-
tion is required to maintain a safe distance
upon sudden braking by the vehicle ahead or
when a vehicle suddenly appears in front of
you. Always stay alert when using the DCA
system.The Distance Control Assist (DCA) system helps
assist the driver to keep a following distance to
the vehicle ahead by braking and moving the
accelerator pedal upward in the normal driving
condition.
When a vehicle is detected ahead :
The vehicle ahead detection indicator comes
on.
When vehicle approaches a vehicle ahead :
●
If the driver’s foot is not on the accelerator
pedal, the system activates the brakes to
decelerate smoothly as necessary. If the
vehicle ahead comes to a stop, the vehicle
decelerates to a standstill within the limita-
tions of the system.
● If the driver’s foot is on the accelerator
pedal, the system moves the accelerator
pedal upward to assist the driver to release
the accelerator pedal.
When brake operation by driver is required :
The system alerts the driver by a warning chime
and blinking the vehicle ahead detection indi-
cator. If the driver’s foot is on the accelerator
pedal after the warning, the system moves the
accelerator pedal upward to assist the driver to
switch to the brake pedal.
SSD0746
5-62Starting and driving

FCW system operation
The FCW system will function at speeds of
approximately 10 MPH (15 km/h) and above,
when the system turns on.
The FCW system has an automatic setting mode
and a manual setting mode to turn the system
on. The setting mode can be changed. In the
automatic setting mode, the FCW system is
automatically turned on when the ignition
switch is pushed to the ON position. When the
FCW system is on, the warning systems ON
indicator light
1on the warning systems
switch illuminates. To cancel the FCW system,
push the warning systems switch. The warning systems ON indicator light will turn off. To turn
on the system, push the warning systems
switch again.
When the warning systems switch is pushed,
the LDW BSW system will also turn on or off
simultaneously. See “LANE DEPARTURE WARN-
ING (LDW) SYSTEM” earlier in this section and
“BLIND SPOT WARNING (BSW) SYSTEM” earlier
in this section.
In the manual setting mode, you need to push
the warning systems switch to turn on the
system after the ignition switch is pushed to the
ON position.
The setting mode can be changed using the
warning systems switch. To change the setting
mode, push and hold the warning systems
switch for more than 4 seconds when the
warning systems ON indicator is off. When the
mode is changed, a chime sounds and the lane
departure warning light (orange) flashes.
For the sensor maintenance, see “INTELLIGENT
CRUISE CONTROL (ICC) SYSTEM (FULL SPEED
RANGE)” earlier in this section.
The Intelligent Brake Assist (IBA) system warns
the driver by a warning light and chime when
there is a risk of a collision with the vehicle
ahead in the traveling lane and the driver must
take avoidance action immediately. The system
helps reduce the rear-end collision speed by
applying the brakes when the system judges
that the collision cannot be prevented.
The IBA system will function when your vehicle
is driven at speeds of approximately 10 MPH (15
km/h) and above, and when your vehicle is
driven at speeds approximately 10 MPH (15
km/h) faster than the vehicle ahead.
Warning systems switch
SSD1156
INTELLIGENT BRAKE ASSIST (IBA) SYSTEM
(if so equipped)
Starting and driving5-69

WARNING
If the engine is not running or is turned off while
driving, the power assist for the steering will
not work. Steering will be harder to operate.
The power assisted steering uses a hydraulic
pump, driven by the engine, to assist steering.
If the engine stops or the drive belt breaks, you
will still have control of the vehicle. However,
much greater steering effort is needed, espe-
cially in sharp turns and at low speeds.
BRAKING PRECAUTIONS
The brake system has two separate hydraulic
circuits. If one circuit malfunctions, you will still
have braking at two wheels.
You may feel a small click and hear a sound
when the brake pedal is fully depressed slowly.
This is not a malfunction and indicates that the
brake assist mechanism is operating properly.
Vacuum assisted brakes
The brake booster aids braking by using engine
vacuum. If the engine stops, you can stop the
vehicle by depressing the brake pedal. How-
ever, greater foot pressure on the brake pedal
will be required to stop the vehicle and the
stopping distance will be longer.
When the brake pedal is depressed slowly and
firmly, you may hear a clicking noise and feel a
slight pulsation. This is normal and indicates
that the Brake Assist System is operating.
Wet brakes
When the vehicle is washed or driven through
water, the brakes may get wet. As a result, your
braking distance will be longer and the vehicle
may pull to one side during braking.
To dry brakes, drive the vehicle at a safe speed
while lightly tapping the brake pedal to heat-up the brakes. Do this until the brakes return to
normal. Avoid driving the vehicle at high speeds
until the brakes function correctly.
PARKING BRAKE BREAK-IN
Break in the parking brake shoes whenever the
stopping effect of the parking brake is weak-
ened or whenever the parking brake shoes
and/or drums/rotors are replaced, in order to
assure the best braking performance.
This procedure is described in the vehicle ser-
vice manual and can be performed by an
INFINITI retailer.
Using the brakes
Avoid resting your foot on the brake pedal while
driving. This will cause overheating of the
brakes, wearing out the brake and pads faster
and reduce gas mileage.
To help save the brakes and to prevent the
brakes from overheating, reduce speed and
downshift to a lower gear before going down a
slope or long grade. Overheated brakes may
reduce braking performance and could result in
loss of vehicle control.
POWER STEERING
BRAKE SYSTEM
Starting and driving5-77

WARNING
●While driving on a slippery surface, be care-
ful when braking, accelerating or downshift-
ing. Abrupt braking or accelerating could
cause the wheels to skid and result in an
accident.
● If the engine is not running or is turned off
while driving, the power assist for the
brakes will not work. Braking will be harder.
BRAKE ASSIST
When the force applied to the brake pedal
exceeds a certain level, the Brake Assist is
activated generating greater braking force than
a conventional brake booster even with light
pedal force.
WARNING
The Brake Assist is only an aid to assist braking
operation and is not a collision warning or
avoidance device. It is the driver’s responsibil-
ity to stay alert, drive safely and be in control of
the vehicle at all times.
PREVIEW FUNCTION (Intelligent Cruise
Control system equipped models)
When the Preview Function identifies the need
to apply emergency braking by sensing a ve-
hicle ahead in the same lane and the distance
and relative speed from it, it applies the brake
pre-pressure before the driver depresses the
brake pedal and helps improve brake response
by reducing pedal free play.
● This system will not operate when the ve-
hicle is moving at approximately 20 MPH (32
km/h) or less.
● The pre-pressure function ceases when the
following conditions are met:
a) When the driver depresses the accel- erator pedal or the brake pedal.
b) If the driver does not operate the ac- celerator or brake pedal within ap-
proximately 1 second.
BRAKE ASSIST
5-78Starting and driving

– For detailed information, see “WHEELSAND TIRES” in the “8. Maintenance and
do-it-yourself” section of this manual.
The Anti-lock Braking System (ABS) controls the
brakes so the wheels do not lock during hard
braking or when braking on slippery surfaces.
The system detects the rotation speed at each
wheel and varies the brake fluid pressure to
prevent each wheel from locking and sliding. By
preventing each wheel from locking, the system
helps the driver maintain steering control and
helps to minimize swerving and spinning on
slippery surfaces.
Using the system
Depress the brake pedal and hold it down.
Depress the brake pedal with firm steady pres-
sure, but do not pump the brakes. The ABS will
operate to prevent the wheels from locking up.
Steer the vehicle to avoid obstacles.
WARNING
Do not pump the brake pedal. Doing so may
result in increased stopping distances.
Self-test feature
The ABS includes electronic sensors, electric
pumps, hydraulic solenoids and a computer.
The computer has a built-in diagnostic feature
that tests the system each time you start the
engine and move the vehicle at a low speed in
forward or reverse. When the self-test occurs,
you may hear a “clunk” noise and/or feel a
pulsation in the brake pedal. This is normal and
does not indicate a malfunction. If the computer
senses a malfunction, it switches the ABS off
and illuminates the ABS warning light on the
instrument panel. The brake system then oper-
ates normally, but without anti-lock assistance.
If the ABS warning light illuminates during the
self-test or while driving, have the vehicle
checked by an INFINITI retailer.
Normal operation
The ABS operates at speeds above 3 to 6 MPH
(5 to 10 km/h). The speed varies according to
road conditions.
When the ABS senses that one or more wheels
are close to locking up, the actuator rapidly
applies and releases hydraulic pressure. This
action is similar to pumping the brakes very
quickly. You may feel a pulsation in the brake
pedal and hear a noise from under the hood or
feel a vibration from the actuator when it is
operating. This is normal and indicates that the
ABS is operating properly. However, the pulsa-
tion may indicate that road conditions are haz-
ardous and extra care is required while driving.
Starting and driving5-81