sensor NISSAN ALTIMA 2017 L33 / 5.G Service Manual

When driving on roads with limited road struc-
tures or buildings (for example, or long bridges,
deserts, snow fields, driving next to long walls) ,
the system may illuminate the system warning
light (orange) and display the “ Unavailable: Front
Radar Obstruction” message.
Action to take
If the warning light (orange) comes on, stop the
vehicle in a safe place, place the shift lever in the
P (Park) position and turn the engine off. Clean
the radar cover on the lower grille with a soft
cloth, and restart the engine. If the warning light
continues to illuminate, have the FEB system
checked. It is recommended that you visit a
NISSAN dealer for this service.
NOTE:
If the FEB system stops working, the PFCW
system (if so equipped) will also stop work-
ing.SYSTEM MALFUNCTION
If the FEB system malfunctions, it will be turned
off automatically, a chime will sound, the FEB
warning light (orange) will illuminate and the
warning message [Malfunction] will appear in the
vehicle information display.
Action to take
If the warning light (orange) comes on, stop the
vehicle in a safe location, turn the engine off and
restart the engine. If the warning light continues
to illuminate, have the FEB systems checked. It is
recommended that you visit a NISSAN dealer for
this service.
SYSTEM MAINTENANCE
The sensor1for the FEB is located on the front
of the vehicle.
To keep the system operating properly, be sure to
observe the following:
● Always keep the sensor area of the front
bumper clean.
● Do not strike or damage the areas around
the sensor.
● Do not cover or attach stickers or similar
objects on the front bumper near the sensor
area. This could cause failure or malfunction.
LSD2479
Starting and driving5-61

WARNING
Failure to follow the warnings and instruc-
tions for proper use of the PFCW system
could result in serious injury or death.
●The PFCW system can help warn the
driver before a collision occurs but will
not avoid a collision. It is the driver’s
responsibility to stay alert, drive safely
and be in control of the vehicle at all
times.
The PFCW system can help alert the driver when
there is a sudden braking of a second vehicle
traveling in front of the vehicle ahead in the same
lane. The PFCW system uses a radar sensor
1lo-
cated on the front of the vehicle to measure the
distance to the vehicle ahead in the same lane.
LSD2479
PREDICTIVE FORWARD COLLISION
WARNING (PFCW) (if so equipped)
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WARNING
Listed below are the system limitations for
the PFCW system. Failure to operate the
vehicle in accordance with these system
limitations could result in serious injury or
death.
●The PFCW system cannot detect all ve-
hicles under all conditions.
● The radar sensor does not detect the
following objects:
– Pedestrians, animals or obstacles in the roadway – Oncoming vehicles
– Crossing vehicles
● (Illustration A) The PFCW system does
not function when a vehicle ahead is a
narrow vehicle, such as a motorcycle.
● The radar sensor may not detect a ve-
hicle ahead in the following conditions:
– Snow or heavy rain
– Dirt, ice, snow or other material cov- ering the radar sensor.
– Interference by other radar sources. – Snow or road spray from travelling
vehicles.
– Driving in a tunnel
– (Illustration B) When the vehicle ahead is being towed.
– (Illustration C) When the distance to the vehicle ahead is too close, the
beam of the radar sensor is
obstructed.
– (Illustration D) When driving on a steep downhill slope or roads with
sharp curves.
Illustration B
LSD2265
5-68Starting and driving

●The system is designed to automatically
check the sensor’s functionality, within
certain limitations. The system may not
detect some forms of obstruction of the
sensor area such as ice, snow, stickers,
etc. In these cases, the system may not
be able to warn the driver properly. Be
sure that you check, clean and clear the
sensor area regularly.
● Excessive noise will interfere with the
warning chime sound, and the chime
may not be heard.
Starting and driving5-69

SYSTEM TEMPORARILY
UNAVAILABLE
Condition A
When the radar sensor picks up interference
from another radar source, making it impossible
to detect a vehicle ahead, the PFCW system is
automatically turned off.
The FEB system warning light (orange) will illu-
minate.
Action to take
When the above conditions no longer exist, the
PFCW system will resume automatically.
Condition B
When the sensor area of the front bumper is
covered with dirt or is obstructed, making it im-
possible to detect a vehicle ahead, the PFCW
system is automatically turned off.
The FEB system warning light (orange) will illu-
minate and the “Unavailable: Front Radar Ob-
struction” warning message will appear in the
vehicle information display.
When driving on roads with limited road struc-
tures or buildings (for example, or long bridges,
deserts, snow fields, driving next to long walls) ,
the system may illuminate system warning light
LSD2488
5-72Starting and driving

(orange) and display the “Unavailable: Front Ra-
dar Obstruction” message.
Action to take
If the warning light (orange) comes on, stop the
vehicle in a safe place, place the shift lever in the
P (Park) position and turn the engine off. Clean
the radar cover on the lower grille with a soft
cloth, and restart the engine. If the warning light
continues to illuminate, it is recommended that
you visit a NISSAN dealer.
NOTE:
If the FEB system stops working, the PFCW
system (if so equipped) will also stop work-
ing.
SYSTEM MALFUNCTION
If the PFCW system malfunctions, it will be
turned off automatically, a chime will sound, the
FEB system warning light (orange) will illuminate
and the warning message [Malfunction] will ap-
pear in the vehicle information display.
Action to take
If the warning light (orange) comes on, stop the
vehicle in a safe location, turn the engine off and
restart the engine. If the warning light continues
to illuminate, it is recommended you visit a
NISSAN dealer.
SYSTEM MAINTENANCE
The sensor1is located on the front of the
vehicle.
To keep the system operating properly, be sure to
observe the following:
● Always keep the sensor area of the front
bumper clean.
● Do not strike or damage the areas around
the sensor.
● Do not cover or attach stickers or similar
objects on the front bumper near the sensor
area. This could cause failure or malfunction. ●
Do not attach metallic objects near the sen-
sor area (brush guard, etc.) . This could
cause failure or malfunction.
● Do not alter, remove or paint the front bum-
per. Before customizing or restoring the
front bumper, contact a NISSAN dealer.
FCC Notice
For USA
This device complies with Part 15 of the
FCC Rules. Operation is subject to the fol-
lowing two conditions: 1. This device may not cause harmful in-
terference, and
2. This device must accept any interfer-
ence received, including interference
that may cause undesired operation.
FCC Warning
Changes or modification not expressly ap-
proved by the party responsible for compli-
ance could void the user’s authority to op-
erate the equipment.
LSD2479
Starting and driving5-73

– When installing a spare tire, makesure that it is the proper size and type
as specified on the Tire and Loading
Information label. For additional in-
formation, refer to “Tire and Loading
Information label” in the “Technical
and consumer information” section
of this manual.
– For additional information, refer to “Wheels and tires” in the “Do-it-
yourself” section of this manual.
The ABS controls the brakes so the wheels do
not lock during hard braking or when braking on
slippery surfaces. The system detects the rota-
tion speed at each wheel and varies the brake
fluid pressure to prevent each wheel from locking
and sliding. By preventing each wheel from lock-
ing, the system helps the driver maintain steering
control and helps to minimize swerving and spin-
ning on slippery surfaces.
Using the system
Depress the brake pedal and hold it down. De-
press the brake pedal with firm steady pressure,
but do not pump the brakes. The ABS will oper-
ate 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 malfunc-
tion, it switches the ABS off and illuminates the
ABS warning light on the instrument panel. The
brake system then operates normally but without
anti-lock assistance.
If the ABS warning light illuminates during the
self-test or while driving, have the vehicle
checked. It is recommended that you visit a
NISSAN dealer for this service.
Normal operation
The ABS operates at speeds above3-6mph(5
- 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 ap-
plies 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 pulsation may indicate that road
conditions are hazardous and extra care is re-
quired while driving.
BRAKE ASSIST
When the force applied to the brake pedal ex-
ceeds a certain level, the brake assist is activated
generating greater braking force than a conven-
tional 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 driv-
ers responsibility to stay alert, drive safely
and be in control of the vehicle at all times.
Starting and driving5-79

The VDC system uses various sensors to monitor
driver inputs and vehicle motion. Under certain
driving conditions, the VDC system helps to per-
form the following functions:● Controls brake pressure to reduce wheel
slip on one slipping drive wheel so power is
transferred to a non slipping drive wheel on
the same axle.
● Controls brake pressure and engine output
to reduce drive wheel slip based on vehicle
speed (traction control function) .
● Controls brake pressure at individual wheels
and engine output to help the driver maintain
control of the vehicle in the following condi-
tions:
– understeer (vehicle tends to not follow the steered path despite increased steer-
ing input)
– oversteer (vehicle tends to spin due to certain road or driving conditions)
The VDC system can help the driver to maintain
control of the vehicle, but it cannot prevent loss of
vehicle control in all driving situations. When the VDC system operates, theindi-
cator in the instrument panel flashes to note the
following:
● The road may be slippery or the system may
determine some action is required to help
keep the vehicle on the steered path.
● You may feel a pulsation in the brake pedal
and hear a noise or vibration from under the
hood. This is normal and indicates that the
VDC system is working properly.
● Adjust your speed and driving to the road
conditions.
For additional information, refer to “Slip indicator
light” and “Vehicle Dynamic Control (VDC) OFF
indicator light” in the “Instruments and controls”
section of this manual.
If a malfunction occurs in the system, the
indicator light comes on in the instrument panel.
The VDC system automatically turns off when the
indicator light is on.
The VDC OFF switch is used to turn off the VDC
system. The
indicator illuminates to indi-
cate the VDC system is off.
When the VDC switch is used to turn off the
system, the VDC system still operates to prevent
one drive wheel from slipping by transferring
power to a non slipping drive wheel. The
indicator flashes if this occurs. All other VDC
functions are off and the
indicator will not
flash.
The VDC system is automatically reset to ON
when the ignition switch is placed in the OFF
position then back to the ON position.
The computer has a built in diagnostic feature
that tests the system each time you start the
engine and move the vehicle forward or in reverse
at a slow speed. When the self-test occurs, you
may hear a clunk noise and/or feel a pulsation in
the brake pedal. This is normal and is not an
indication of a malfunction.
WARNING
● The VDC system is designed to help the
driver maintain stability but does not
prevent accidents due to abrupt steer-
ing operation at high speeds or by care-
less or dangerous driving techniques.
Reduce vehicle speed and be especially
careful when driving and cornering on
slippery surfaces and always drive
carefully.
VEHICLE DYNAMIC CONTROL (VDC)
SYSTEM
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The sonar (parking sensor) system sounds a tone
to inform the driver of obstacles near the bumper.
When the “DISPLAY” key is ON, the sonar view
will automatically appear in the meter.
WARNING
Failure to follow the warnings and instruc-
tions for proper use of the sonar system
could result in serious injury or death.
●The sonar system is not a replacement
for proper driving procedures and is not
designed to prevent contact with ve-
hicles or objects. ●
The driver is always responsible for
safety during parking and other maneu-
vers. Always look around and check that
it is safe to do so before parking.
● This function is designed as an aid to
the driver in detecting large stationary
objects to help avoid damaging the
vehicle.
If your vehicle sustains damage to the bumper
fascia, leaving it misaligned or bent, the sensing
zone may be altered causing inaccurate mea-
surement of obstacles or false alarm.
CAUTION
● Excessive noise (such as audio system
volume or an open vehicle window) will
interfere with the tone and it may not be
heard
● Keep the sonar sensors (located on the
bumper fascia’s) free from snow, ice
and large accumulations of dirt. Do not
clean the sensors with sharp objects. If
the sensors are covered, the accuracy of
the sonar function will be diminished.
SYSTEM OPERATION
The system informs with a visual and audible alert
of front obstacles when the shift lever is in the D
(Drive) position and both front and rear obstacles
when the shift lever is in the R (Reverse) position.
Sonar Operation Table
FR Sensor RR Sensor
Range Sound Display Sound Display Px†x †
R ooo o
Nx†x †
Doox †
o – Display/Beep when detect
† – Display on camera view
x – No Display and Beep
The system is deactivated at speeds above
6 mph (10 km/h). It is reactivated at lower
speeds.
The intermittent tone will stop after 3 seconds
when an obstacle is detected by only the corner
sensor and the distance does not change. The
tone will stop when the obstacle get away from
the vehicle.
LSD2135
FRONT AND REAR SONAR SYSTEM
(if so equipped)
Starting and driving5-83

HOW TO ENABLE/DISABLE THE
SONAR SYSTEM
The system is automatically activated when the
ignition is in the ON position and the shift lever is
in the R (Reverse) position.
Perform the following steps to enable or disable
the sonar system:1. Press the
button until “Settings” dis-
plays in the vehicle information display and
then press ENTER. Use the
button to
select “Driver Assistance.” Then press the
ENTER button.
2. Select “Parking Aids” and press the ENTER button.
3. Select “Sensor” and press the ENTER but- ton.
NOTE: ● The system will automatically be turned on
when the engine is restarted.
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