sensor NISSAN SENTRA 2023 Repair Manual

Action to take:
When the conditions listed above are no
longer present, the warning message will
no longer be available in the vehicle infor-
mation display. If the “Forward Driving Aids
Temporarily Disabled Front Sensor
Blocked: See Owner’s Manual” or “Driving
Aids Temporarily Disabled Front Sensor
Blocked: See Manual” warning message
continues to be displayed, have the system
checked. It is recommended that you visit a
NISSAN dealer for this service.
Condition C
When the radar sensor of the front bumper
is covered with mud, dirt, snow, ice, etc., or is
obstructed, the I-FCW system will auto-
matically be canceled, the chime will sound
and the “Forward Driving Aids Temporarily
Disabled Front Sensor Blocked: See Own-
er’s Manual” or “Driving Aids Temporarily
Disabled Front Sensor Blocked: See
Manual” warning message will appear in
the vehicle information display.
LSD3796
For vehicles with the 4.2 inch meter display
5-118Starting and driving

Action to take:
If the warning message appears, stop the
vehicle in a safe place, place the shif t lever
in the P (Park) position, and turn the engine
off. When the radar signal is temporarily
interrupted, clean the sensor area of the
front bumper and restart the engine. If the
“Forward Driving Aids Temporarily Disabled
Front Sensor Blocked: See Owner’s Manual”
or “Driving Aids Temporarily Disabled Front
Sensor Blocked: See Manual” warning mes-
sage continues to be displayed, have the
system checked. It is recommended that
you visit a NISSAN dealer for this service.
Condition D
When driving on roads with limited road
structures or buildings (for example, long
bridges, deserts, snowfields, driving next to
long walls), the system may illuminate the
system warning light and display the “For-
ward Driving Aids Temporarily Disabled
Front Sensor Blocked: See Owner’s Manual”
or “Driving Aids Temporarily Disabled Front
Sensor Blocked: See Manual” message.
Action to take:
When the above driving conditions no lon-
ger exist, turn the system back on.NOTE:
If the AEB with Pedestrian Detection sys-
tem stops working, the I-FCW system will
also stop working.
SYSTEM MALFUNCTION
If the I-FCW system malfunctions, it will be
turned off automatically, a chime will
sound, the AEB with Pedestrian Detection
warning light (orange) will illuminate and
the warning message [Malfunction] will ap-
pear in the vehicle information display.
LSD3890
Starting and driving5-119

Action to take
If the warning light (orange) comes on, stop
the vehicle in a safe location, turn the en-
gine off and restart the engine. If the
warning light continues to illuminate, have
the I-FCW system checked. It is recom-
mended that you visit a NISSAN dealer for
this service.
SYSTEM MAINTENANCE
The sensorOAis 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/emblem 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
sensor area (brush guard, etc.). This could
cause failure or malfunction.
• Do not alter, remove or paint the front bumper. Before customizing or restoring
the front bumper, it is recommended that
you visit a NISSAN dealer.
LSD3826
5-120Starting and driving

•Tire type and condition may also af-
fect braking effectiveness.
– When replacing tires, install the
specified size of tires on all four
wheels.
– When installing a spare tire, make
sure that it is the proper size and
type as specified on the Tire and
Loading Information label. For ad-
ditional information, see “Tire and
Loading Information label”
(P. 8-31).
– For additional information, see
“Wheels and tires” (P. 8-29).
The 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 pre-
vent 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
pressure, but do not pump the brakes. The
Anti-lock Braking System 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 Anti-lock Braking System (ABS) in-
cludes 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 mal-
function. If the computer senses a mal-
function, it switches the ABS off and illumi-
nates 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 ve-
hicle checked. It is recommended that you
visit a NISSAN dealer for this service.
Normal operation
The Anti-lock Braking System (ABS) oper-
ates at speeds abov
e3-6mph(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 applies and releases hydraulic pres-
sure. This action is similar to pumping the
brakes very quickly. You may feel a pulsa-
tion 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 op-
erating properly. However, the pulsation
may indicate that road conditions are haz-
ardous and extra care is required while
driving.
5-130Starting and driving

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 responsibility to stay alert,
drive safely and be in control of the ve-
hicle at all times. The VDC system uses various sensors to
monitor driver inputs and vehicle motion.
Under certain driving conditions, the VDC
system helps to perform 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 out- put 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 conditions:– Understeer (vehicle tends to not follow the steered path despite increased
steering 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 can-
not prevent loss of vehicle control in all driv-
ing situations.
When the VDC system operates, the
indicator light 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 indi-
cates that the VDC system is working
properly.
• Adjust your speed and driving to the road conditions.
For additional information, see “Slip indica-
tor light” (P. 2-16) and ”Vehicle Dynamic Con-
trol (VDC) OFF indicator light” (P. 2-16).
If a malfunction occurs in the system, the
indicator light comes on in the instru-
ment panel. The VDC system automatically
turns off when the indicator light is off.
The vehicle information display is used to
turn off the VDC system. The
indicator
light and the AEB system warning light illu-
minates to indicate the VDC system is off.
When the vehicle information display is
used to turn off the VDC system, the sys-
tem still operates to prevent one drive
wheel from slipping by transferring power
to a non-slipping drive wheel. The
indicator light flashes if this occurs. All
VEHICLE DYNAMIC CONTROL (VDC)
SYSTEM
Starting and driving5-131

When the Intelligent Trace Control is oper-
ating, you may feel a pulsation in the brake
pedal and hear a noise. This is normal and
indicates that the Intelligent Trace Control
is operating properly.
You may also feel deceleration when the
Intelligent Trace Control is operating. How-
ever, this is not a malfunction.
ACTIVE RIDE CONTROL
This system senses upper body motion
(based on wheel speed information) and
controls four wheel brake pressure. This will
enhance ride comfort in effort to restrain
uncomfortable upper body movement
when passing over undulated road
surfaces.
When the VDC system is turned off, the Ac-
tive Ride Control is also turned off.
When the Active Ride Control is operating,
you may hear noise and sense slight decel-
eration. This is normal and indicates that
the Active Ride Control is operating
properly.
If the chassis control warning message ap-
pears in the vehicle information display, it
may indicate that Active Ride Control is not
functioning properly. Have the system
checked by a NISSAN dealer as soon aspossible. See “Vehicle information display
warnings and indicators” (P. 2-26) or (P. 2-41).
INTELLIGENT ENGINE BRAKE
The Intelligent Engine Brake function adds
subtle deceleration by controlling gear ra-
tio, depending on the cornering condition
calculated from driver’s steering input and
plural sensors. This benefit is for easier
traceability and less workload of adjusting
speed with braking at corners.
The Intelligent Engine Brake also adds
subtle deceleration with gear ratio control
according to driver’s brake pedal
operation.
If the chassis control warning message ap-
pears in the vehicle information display, it
may indicate that the Intelligent Engine
Brake is not functioning properly. Have the
system checked by a NISSAN dealer as
soon as possible. See “Vehicle information
display warnings and indicators” (P. 2-26) or
(P. 2-41).
WARNING
The Intelligent Engine Brake may not
be effective depending on the driving
condition. Always drive carefully and
attentively. When the Intelligent Engine Brake is oper-
ating, the needle of the tachometer will rise
up and you may hear an engine noise. This
is normal and indicates that the Intelligent
Engine Brake is operating properly.
5-134Starting and driving

WARNING
• The RSS is a convenience but it is not
a substitute for proper parking.
• The driver is always responsible for
safety during parking and other ma-
neuvers. Always look around and
check that it is safe to do so before
parking.
• Read and understand the limitations
of the RSS as contained in this sec-
tion. The colors of the corner sonar
indicator and the distance guide
lines in the rear view indicate differ-
ent distances to the object.
• Inclement weather or ultrasonic
sources such as an automatic car
wash, a truck's compressed-air
brakes or a pneumatic drill may af-
fect the function of the system; this
may include reduced performance or
a false activation.
• This function is designed as an aid to
the driver in detecting large station-
ary objects to help avoid damaging
the vehicle. •The system is not designed to prevent
contact with small or moving objects.
Always move slowly. The system will
not detect small objects below the
bumper, and may not detect objects
close to the bumper or on the ground.
• The system may not detect the fol-
lowing objects: fluff y objects such as
snow, cloth, cotton, glass, wool, etc.;
thin objects such as rope, wire and
chain, etc.; or wedge-shaped objects.
If your vehicle sustains damage to the
bumper fascia, leaving it misaligned or
bent, the sensing zone may be altered
causing inaccurate measurement of ob-
stacles or false alarms.
CAUTION
• Excessive noise (such as audio sys-
tem volume or an open vehicle win-
dow) will interfere with the tone and
it may not be heard.
• Keep the sonar sensors (located on
the bumper fascia) 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 au-
dible alert of rear obstacles when the shif t
lever is in the R (Reverse) position.
The system is deactivated at speeds above
6 mph (10 km/h). It is reactivated at lower
speeds.
The intermittent tone will stop af ter 3 sec-
onds when an obstacle is detected by only
the corner sensor and the distance does
not change. The tone will stop when the
obstacle moves away from the vehicle or if
the vehicle moves away from the obstacle.
When the object is detected, the indicator
(green) appears and blinks and the tone
sounds intermittently. When the vehicle
moves closer to the object, the color of the
indicator turns yellow and the rate of the
blinking increases. When the vehicle is very
close to the object, the indicator stops
blinking and turns red, and the tone
sounds continuously.
5-136Starting and driving

HOW TO ENABLE/DISABLE THE
SONAR SYSTEM
The system is automatically activated
when the ignition is in the ON position and
the shif t lever is in the R (Reverse) position.
Perform the following steps to enable or
disable the sonar system:
For vehicles with the 7 inch meter
display:
1. Press the
button until “Settings” dis-
plays in the vehicle information display.
Use the
button to select “Driver As-
sistance.” Then press the OK button.
2. Select “Parking Aids” and press the OK button.
3. Select “Rear” and press the OK button to turn the system on or off.
– Select “Auto Show Sonar” to display the parking sensor in the vehicle information
display when the sonar system
activates.
– Select “Distance” to change the sonar system distance to “Long,” “Medium” or
“Short.”
– Select “Volume” to change the volume to “High,” “Medium” or “Low”
LSD3981
For vehicles with the 7 inch meter display
5-138Starting and driving

For vehicles with the 4.2 inch meter
display:
1. Press the
button until “Settings” dis-
plays in the vehicle information display.
Use the
button to select “Driver As-
sistance.” Then press the OK button.
2. Select “Parking Aids” and press the OK button.
3. Select “Rear Sensor” and press the OK button to turn the system on or off.
– Select “Display” to display the parking sensor in the vehicle information display
when the sonar system activates.
– Select “Distance” to change the sonar system distance to “Long,” “Medium” or
“Short.”
– Select “Volume” to change the volume to “High,” “Medium” or “Low”
LSD3799
For vehicles with the 4.2 inch meter display
Starting and driving5-139

SONAR LIMITATIONS
WARNING
Listed below are the system limitations
for the sonar system. Failure to operate
the vehicle in accordance with these
system limitations could result in seri-
ous injury or death.
• The system is deactivated at speeds
above 6 mph (10 km/h). It is reacti-
vated at lower speeds.
• Inclement weather or ultrasonic
sources such as an automatic car
wash, a truck’s compressed-air
brakes or a pneumatic drill may af-
fect the function of the system; this
may include reduced performance or
a false activation.
• The system is not designed to pre-
vent contact with small or moving
objects. Always move slowly. The
system will not detect small objects
below the bumper or on the ground.
• The system may not detect the fol-
lowing objects: fluff y objects such as
snow, cloth, cotton, glass-wool, etc.;
thin objects such as rope, wire and
chain, etc.; or wedge-shaped objects. •
The system may not detect objects
at speeds above 3 mph (5 km/h) and
may not detect certain angular or
moving objects.
• Do not attach stickers (including
transparent material), install acces-
sories, or apply anything blocking
the sensors. These conditions may
reduce the ability of the system.
SYSTEM TEMPORARILY
UNAVAILABLE
When sonar blockage is detected, the sys-
tem will be deactivated automatically.
The system is not available until the condi-
tions no longer exist.
The sonar sensors may be blocked by tem-
porary ambient conditions such as splash-
ing water, mist or fog. The blocked condi-
tion may also be caused by objects such as
ice, frost or dirt obstructing the sonar
sensors.
Action to take:
When the above conditions no longer exist,
the system will resume automatically.
SYSTEM MAINTENANCE
The sonar sensorsO1are located on the
rear bumper. Always keep the area near
the sonar sensors clean.
The sonar sensors may be blocked by tem-
porary ambient conditions such as splash-
ing water, mist or fog.
The blocked condition may also be caused
by objects such as ice, frost or dirt ob-
structing the sonar sensors.
Check for and remove objects obstructing
the area around the sonar sensors.
LSD3754
5-140Starting and driving