2020 INFINITI QX50 brake

∙ As there is a performance limit to the dis-tance control function, never rely solely
on the DCA system. This system does not
correct careless, inattentive or absent-
minded driving, or overcome poor visibil-
ity in rain, fog, or other bad weather. De-
celerate the vehicle speed by depressing
the brake pedal, depending on the dis-
tance to the vehicle ahead and the sur-
rounding circumstances in order to main-
tain a safe distance between vehicles.
∙ Always pay attention to the operation of the vehicle and be ready to manually de-
celerate to maintain the proper following
distance. The DCA system may not be
able to decelerate the vehicle under some
circumstances.
∙ This system only brakes and moves the accelerator pedal upward to help assist
the driver to maintain a following dis-
tance from the vehicle ahead. Accelera-
tion should be operated by the driver.
∙ The DCA system does not control the ve- hicle speed or warn you when you ap-
proach stationary and slow moving ve-
hicles. You must pay attention to vehicle
operation to maintain proper distance
from vehicles ahead. ∙ The DCA system automatically deceler-
ates your vehicle to help assist the driver
to maintain a following distance from the
vehicle ahead. Manually brake when de-
celeration is required to maintain a safe
distance upon sudden braking by the ve-
hicle ahead or when a vehicle suddenly
appears in front of you. Always stay alert
when using the DCA system.
∙ If the vehicle ahead comes to a stop, the vehicle decelerates to a standstill within
the limitations of the system. The system
will cancel with a warning chime once it
judges that the vehicle has come to a
standstill. To prevent the vehicle from
moving, the driver must depress the
brake pedal.
The DCA system is intended to assist the
driver in keeping a following distance from
the vehicle ahead traveling in the same lane
and direction.
If the radar sensor detects a slower moving
vehicle ahead, the system will reduce the ve-
hicle speed to help assist the driver to main-
tain a following distance. The system automatically controls the
throttle and applies the brakes (up to ap-
proximately 40% of vehicle braking power) if
necessary.
The detection range of the sensor is approxi-
mately 650 ft (200m) ahead.
5-134Starting and driving

1. Vehicle information display
2. Lower display buttons
3. ProPILOT Assist switch (for vehicleswith ProPILOT Assist)
4. Dynamic driver assistance switch (for vehicles without ProPILOT Assist)
5. DCA ON indicator
DCA SYSTEM OPERATION
WARNING
Failure to follow the warnings and instruc-
tions for proper use of the DCA system
could result in serious personal injury or
death.
∙ When the vehicle ahead detection indica- tor light is not illuminated, the system
will not control the vehicle or warn the
driver.
∙ Never place your foot under the brake pedal. Your foot may be caught when the
system controls the brake.
∙ Depending on the position of the accel- erator pedal, the system may not be able
to assist the driver to release the accel-
erator pedal appropriately.
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The DCA system brakes and moves the ac-
celerator pedal upward according to the dis-
tance from and the relative speed of the ve-
hicle ahead to help assist the driver in
maintaining a following distance. The system
will decelerate as necessary and if the vehicle
ahead comes to a stop, the vehicle deceler-
ates to a standstill. However, the DCA sys-
tem can only apply up to approximately 40%
of the vehicle’s total braking power. If a ve-
hicle 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 de-
celerate 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. For addi-
tional information, refer to “Approach warn-
ing” in this section.The 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 accelera- tor 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 limitations 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 re-
lease the accelerator pedal.
When brake operation by driver is required:
The system alerts the driver by a warning
chime and blinking the vehicle ahead detec-
tion indicator. If the driver’s foot is on the
accelerator pedal after the warning, the sys-
tem moves the accelerator pedal upward to
assist the driver to switch to the brake pedal.
NOTE: ∙ The stop lights of the vehicle come on
when braking is performed by the DCA
system.
∙ When the brake operates, a noise may be
heard. This is not a malfunction.
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Overriding the system:
The following driver’s operations override the
system operation:∙ When the driver depresses the accelera- tor pedal even further while the system is
moving the accelerator pedal upward,
the DCA system control of the accelera-
tor pedal is canceled.
∙ When the driver’s foot is on the accelera- tor pedal, the brake control by the system
is not operated.
∙ When the driver’s foot is on the brake pedal, neither the brake control nor the
alert by the system operates.
∙ When the ICC system is set, the DCA system will be canceled.Approach warning
If your vehicle comes closer to the vehicle
ahead due to rapid deceleration of that ve-
hicle or if another vehicle cuts in, the system
warns the driver with the chime and DCA
system display. Decelerate by depressing the
brake pedal to maintain a safe vehicle dis-
tance if:
∙ The chime sounds.
∙ The vehicle ahead detection indicator blinks.
The warning chime may not sound in some
cases when there is a short distance between
vehicles. Some examples are: ∙ When the vehicles are traveling at the same speed and the distance between
vehicles is not changing
∙ When the vehicle ahead is traveling faster and the distance between vehicles
is increasing
∙ When a vehicle cuts in near your vehicle
The warning chime will not sound when your
vehicle approaches vehicles that are parked
or moving slowly. NOTE:
The approach warning chime may sound and
the system display may blink when the radar
sensor detects objects on the side of the
road. This may cause the DCA system to de-
celerate or accelerate the vehicle. The radar
sensor may detect these objects when the
vehicle is driven on winding roads, narrow
roads, hilly roads or when entering or exiting
a curve. In these cases you will have to manu-
ally control the proper distance ahead of
your vehicle.
Also, the sensor sensitivity can be affected by
vehicle operation (steering maneuver or driv-
ing position in the lane) or traffic or vehicle
condition (for example, if a vehicle is being
driven with some damage).
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DCA SYSTEM LIMITATIONS
WARNING
Listed below are the system limitations of
the DCA system. Failure to operate the ve-
hicle in accordance with these system limi-
tations could result in serious injury or
death.
∙ This system will not adapt automaticallyto road conditions. Do not use the system
on roads with sharp curves, or on icy
roads, in heavy rain or in fog.
∙ The DCA system will not apply brake control while the driver’s foot is on the
accelerator pedal.
∙ As there is a performance limit to the dis- tance control function, never rely solely
on the DCA system. This system does not
correct careless, inattentive or absent-
minded driving, or overcome poor visibil-
ity in rain, fog, or other bad weather. De-
celerate the vehicle speed by depressing
the brake pedal, depending on the dis-
tance to the vehicle ahead and the sur-
rounding circumstances in order to main-
tain a safe distance between vehicles. ∙ The system may not detect the vehicle in
front of you in certain road or weather
conditions. To avoid accidents, never use
the DCA system under the following
conditions:
– On roads where the traffic is heavy or there are sharp curves
– On slippery road surfaces such as on ice or snow, etc.
– On off-road surfaces such as on sand or rock, etc.
– During bad weather (rain, fog, snow, etc.)
– When rain, snow or dirt adhere to the sensor area of the front bumper
– On steep downhill roads (frequent braking may result in overheating the
brakes)
– On repeated uphill and downhill roads
– When traffic conditions make it diffi- cult to keep a proper distance be-
tween vehicles because of frequent
acceleration or deceleration
– When towing a trailer or other vehicle
– Interference by other radar sources ∙ In some road or traffic conditions, a ve-
hicle or object can unexpectedly come
into the sensor detection zone and cause
automatic braking. You may need to con-
trol the distance from other vehicles us-
ing the accelerator pedal. Always stay
alert and avoid using the DCA system
when it is not recommended in this
section.
The radar sensor will not detect the following
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
The following are some conditions in which
the sensor cannot detect the signals: ∙ When the snow or road spray from trav- eling vehicles reduces the sensor’s visibil-
ity
∙ When excessively heavy baggage is loaded in the rear seat or the luggage
room of your vehicle
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1RAB system warning light and RAB sys-
tem warning indicator
2Lower display buttons
3Center display (if so equipped)
RAB SYSTEM OPERATION
When the shift lever is in the R (Reverse)
position and the vehicle speed is less than
approximately 9 mph (15 km/h), the RAB
system operates.
If a risk of a collision with an obstacle is
detected when your vehicle is backing up, the
RAB system warning indicator will flash in the
vehicle information display, a red frame will
appear in the center display (for vehicles with
the Intelligent Around View Monitor system),
and the system will chime three times. The
system will then automatically apply the
brakes. After the automatic brake applica-
tion, the driver must depress the brake pedal
to maintain brake pressure.
NOTE:∙ The brake lights of the vehicle come on
when braking is performed by the RAB
system.
∙ When the brakes operate, a noise may be
heard. This is not a malfunction.
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∙ When the vehicle approaches an obstaclewhile the accelerator or brake pedal is
depressed, the function may not operate
or the start of operation may be delayed.
The RAB system may not operate or may
not perform sufficiently due to vehicle
conditions, driving conditions, the traffic
environment, the weather, road surface
conditions, etc. Do not wait for the sys-
tem to operate. Operate the brake pedal
by yourself as soon as necessary.
∙ If it is necessary to override RAB opera- tion, strongly press the accelerator
pedal.
∙ Always check your surroundings and turn to check what is behind you before and
while backing up. The RAB system de-
tects stationary objects behind the ve-
hicle. The RAB system does not detect
the following objects:
– Moving objects
– Low objects
– Narrow objects
– Wedge-shaped objects
– Objects close to the bumper (less than approximately 1 ft [30 cm]) – Objects that suddenly appear
– Thin objects such as rope, wire, chain,
etc.
∙ The RAB system may not operate for the following obstacles:
– Obstacles located high off the ground
– Obstacles in a position offset from your vehicle
– Obstacles, such as spongy materials or snow, that have soft outer surfaces
and can easily absorb a sound wave
∙ The RAB system may not operate in the following conditions:
– There is rain, snow, ice, dirt, etc., at- tached to the sonar sensors.
– A loud sound is heard in the area around the vehicle.
– The surface of the obstacle is diagonal to the rear of the vehicle.
∙ The RAB system may unintentionally op- erate in the following conditions:
– There is overgrown grass in the area around the vehicle. – There is a structure (e.g., a wall, toll
gate equipment, a narrow tunnel, a
parking lot gate) near the side of the
vehicle.
– There are bumps, protrusions, or man- hole covers on the road surface.
– The vehicle drives through a draped flag or a curtain.
– There is an accumulation of snow or ice behind the vehicle.
– An ultrasonic wave source, such as an- other vehicle’s sonar, is near the
vehicle.
∙ Once the automatic brake control oper- ates, it does not operate again if the ve-
hicle approaches the same obstacle.
∙ The automatic brake control can only op- erate for a short period of time. There-
fore, the driver must depress the brake
pedal.
∙ In the following situations, the RAB sys- tem may not operate properly or may not
function sufficiently:
– The vehicle is driven in bad weather (rain, fog, snow, etc.).
– The vehicle is driven on a steep hill.
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– The vehicle’s posture is changed (e.g.,when driving over a bump).
– The vehicle is driven on a slippery road.
– The vehicle is turned sharply by turn- ing the steering wheel fully.
– Snow chains are used.
– Wheels or tires other than INFINITI recommended are used.
– The brakes are cold at low ambient temperatures or immediately after
driving has started.
– The braking force becomes poor due to wet brakes after driving through a
puddle or washing the vehicle.
∙ Turn the RAB system off in the following conditions to prevent the occurrence of
an unexpected accident resulting from
sudden system operation:
– The vehicle is towed.
– The vehicle is carried on a flatbed truck.
– The vehicle is on the chassis dynamometer.
– The vehicle drives on an uneven road surface. –Suspension parts other than those des-
ignated as Genuine INFINITI parts are
used. (If the vehicle height or the vehicle
body inclination is changed, the system
may not detect an obstacle correctly.)
∙ Excessive noise (e.g., audio system vol-
ume, an open vehicle window) will inter-
fere with the chime sound, and it may not
be heard.
SYSTEM MALFUNCTION
If the RAB system malfunctions, it will be
turned off automatically, the RAB system
warning light will illuminate, and the “System
fault” warning message will appear in the
vehicle information display.
Action to take
If the warning light illuminates, park the ve-
hicle in a safe location, turn the engine off,
and restart the engine. If the warning light
continues to illuminate, have the RAB system
checked. It is recommended that you visit an
INFINITI retailer for this service.
NOTE:
If the RAB system cannot be operated tem-
porarily, the RAB system warning light
blinks.
SYSTEM MAINTENANCE
Observe the following items to ensure proper
operation of the system:
∙ Always keep the parking sensors
1
clean.
∙ If the parking sensors are dirty, wipe them off with a soft cloth while being
careful to not damage them.
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