steering NISSAN SENTRA 2023 Repair Manual

While the AEB with Pedestrian Detection
system is operating, you may hear the
sound of brake operation. This is normal
and indicates that the AEB with Pedestrian
Detection system is operating properly.
NOTE:
The vehicle’s brake lights come on when
any braking is performed by the AEB
with Pedestrian Detection system.
Depending on vehicle speed and distance
to the vehicle or pedestrian ahead, as well
as driving and roadway conditions, the sys-
tem may help the driver avoid a forward
collision or may help mitigate the conse-
quences if a collision should be unavoid-
able. If the driver is handling the steering
wheel, accelerating or braking, the AEB with
Pedestrian Detection system will function
later or will not function.The automatic braking will cease under the
following conditions:
• When the steering wheel is turned to
avoid a collision.
• When the accelerator pedal is depressed.
• When there is no longer a vehicle or a pedestrian detected ahead.
If the AEB with Pedestrian Detection sys-
tem has stopped the vehicle, the vehicle
will remain at a standstill for approximately
2 seconds before the brakes are released.
Starting and driving5-95

– Vehicles where the tires are diffi-cult to see or the shape of the rear
of the vehicle is unclear or
obstructed.
– Parked vehicles.
• The AEB with Pedestrian Detection
system has some performance limi-
tations.
– If a stationary vehicle is in the ve-
hicle’s path, the system will not
function when the vehicle ap-
proaches the stationary vehicle at
speeds over approximately 50
mph (80 km/h).
– Pedestrian detection will not
function when the vehicle is
driven at speeds over approxi-
mately 37 mph (60 km/h) or below
approximately 6 mph (10km/h).
• For pedestrians, the AEB with Pedes-
trian Detection system will not issue
the first warning. •
The AEB with Pedestrian Detection
system may not function properly or
detect a vehicle or pedestrians
ahead in the following conditions:
– In poor visibility conditions (such
as rain, snow, fog, dust storms,
sand storms, smoke, and road
spray from other vehicles).
– If dirt, ice, snow, fog or other ma-
terial is covering the radar sensor
area or camera area of
windshield.
– If strong light (for example, sun-
light or high beams) enters the
front camera or a sudden change
in brightness occurs (for example,
entering a tunnel or driving in
lightning).
– In dark or dimly lit conditions,
such as at night or in tunnels, in-
cluding cases where your vehi-
cle’s headlights are off or dim, or
the tail lights of the vehicle ahead
are off.
– When the direction of the camera
is misaligned.
– When driving on a steep downhill
slope, on roads with sharp curves,
and/or bumpy or dirt roads.
– If there is interference by other ra-
dar sources. –
When your vehicle’s position or
movement is changed quickly or
significantly (for example, lane
change, turning vehicle, abrupt
steering, sudden acceleration or
deceleration).
– When your vehicle or the vehicle
or pedestrian ahead moves
quickly or significantly such that
the system cannot detect and re-
act in time (for example, pedes-
trian moving quickly toward the
vehicle at close range, vehicle cut-
ting in, changing lanes, making a
turn, steering abruptly, sudden
acceleration or deceleration).
– When the vehicle or pedestrian is
offset from the vehicle’s forward
path.
– If the speed difference between
the two vehicles is small.
– The pedestrian’s profile is par-
tially obscured or unidentifiable;
for example, due to transporting
luggage, pushing a stroller, wear-
ing bulky or very loose-fitting
clothing or accessories, or being
in a unique posture (such as rais-
ing hands).
5-98Starting and driving

WARNING
Failure to follow the warnings and in-
structions for proper use of the I-DA
system could result in serious injury or
death.
• The I–DA system is only a warning to
inform the driver of a potential lack
of driver attention or drowsiness. It
will not steer the vehicle or prevent
loss of control.
• The I–DA system does not detect and
provide an alert of the driver’s lack of
attention or fatigue in every
situation.
• It is the driver’s responsibility to:
– stay alert,
– drive safely,
– keep the vehicle in the traveling lane,
– be in control of the vehicle at all times,
– avoid driving when tired,
– avoid distractions (texting, etc.).
The I–DA system helps alert the driver if the
system detects a lack of attention or driv-
ing fatigue. The system monitors driving style and
steering behavior over a period of time,
and it detects changes from the normal
pattern. If the system detects that driver
attention is decreasing over a period of
time, the system uses audible and visual
warnings to suggest that the driver take a
break.
INTELLIGENT DRIVER ALERTNESS
SYSTEM OPERATION
LSD3807
For vehicles with the 7 inch meter
display
INTELLIGENT DRIVER ALERTNESS
(I-DA)
Starting and driving5-121

If the system detects driver fatigue or that
driver attention is decreasing, the mes-
sage “Take a break?” appears in the vehicle
information display and a chime sounds
when the vehicle is driven at speeds above
37 mph (60 km/h).
The system continuously monitors driver
attention and can provide multiple warn-
ings per trip.
The system resets and starts reassessing
driving style and steering behavior when the
ignition switch is cycled from the ON to the
OFF position and back to the ON position.
HOW TO ENABLE/DISABLE THE
INTELLIGENT DRIVER ALERTNESS
(I-DA) SYSTEM
LSD3984
For vehicles with the 4.2 inch meter display
LSD3980
For vehicles with the 7 inch meter display
5-122Starting and driving

3. To help prevent the vehicle from rollinginto traffic when parked on an incline, it
is a good practice to turn the wheels as
illustrated.
• HEADED DOWNHILL WITH CURB
O1:
Turn the wheels into the curb and
move the vehicle forward until the
curb side wheel gently touches the
curb.
• HEADED UPHILL WITH CURB
O2:
Turn the wheels away from the curb
and move the vehicle back until the
curb side wheel gently touches the
curb.
• HEADED UPHILL OR DOWNHILL, NO CURB
O3:
Turn the wheels toward the side of the
road so the vehicle will move away
from the center of the road if it moves.
4. Place the ignition switch in the LOCK position.
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.
• When the power steering warning
light illuminates with the engine run-
ning, there will be no power assist for
the steering. You will still have control
of the vehicle, but the steering will be
harder to operate. Have the power
steering system checked. It is recom-
mended that you visit a NISSAN
dealer for this service.
The power steering system is designed to
provide power assist while driving to oper-
ate the steering wheel with light force.
When the steering wheel is operated re-
peatedly or continuously while parking or
driving at a very low speed, the power as-
sist for the steering wheel will be reduced.
This is to prevent overheating of the power
steering system and protect it from getting
damaged. While the power assist is re-
duced, steering wheel operation will be-
come heavy. When the temperature of the
power steering system goes down, the
power assist level will return to normal.
Avoid repeating such steering wheel op- erations that could cause the power steer-
ing system to overheat.
You may hear a noise when the steering
wheel is operated quickly. However, this is
not a malfunction.
If the power steering warning light illumi-
nates while the engine is running, it may
indicate the power steering system is not
functioning properly and may need servic-
ing. Have the power steering system
checked. It is recommended that you visit a
NISSAN dealer for this service.
When the power steering warning light illu-
minates with the engine running, there will
be no power assist for the steering, but you
will still have control of the vehicle. At this
time, greater steering effort is required to
operate the steering wheel, especially in
sharp turns and at low speeds.
For additional information, see “Power
steering warning light” (P. 2-15).
POWER STEERING
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•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

other VDC functions are off and theindicator light 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 fea-
ture that tests the system each time you
start the engine and move the vehicle for-
ward 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 indica-
tion of a malfunction.
WARNING
• The VDC system is designed to help
the driver maintain stability but does
not prevent accidents due to abrupt
steering operation at high speeds or
by careless or dangerous driving
techniques. Reduce vehicle speed
and be especially careful when driv-
ing and cornering on slippery sur-
faces and always drive carefully. •
Do not modif y the vehicle's suspen-
sion. If suspension parts such as
shock absorbers, struts, springs, sta-
bilizer bars, bushings and wheels are
not NISSAN recommended for your
vehicle or are extremely deterio-
rated, the VDC system may not oper-
ate properly. This could adversely af-
fect vehicle handling performance,
and the
indicator light may flash
or theindicator light may
illuminate.
• If brake related parts such as brake
pads, rotors and calipers are not
NISSAN recommended or are ex-
tremely deteriorated, the VDC sys-
tem may not operate properly and
the
indicator light may
illuminate.
• If engine control related parts are not
NISSAN recommended or are ex-
tremely deteriorated, the
indi-
cator light may illuminate.
• When driving on extremely inclined
surfaces such as higher banked cor-
ners, the VDC system may not oper-
ate properly and the
indicator
light may flash or theindicator
light may illuminate. Do not drive on
these types of roads. •
When driving on an unstable surface
such as a turntable, ferry, elevator or
ramp, the
indicator light may
flash or theindicator light may
illuminate. This is not a malfunction.
Restart the engine af ter driving onto
a stable surface.
• If wheels or tires other than the
NISSAN recommended ones are
used, the VDC system may not oper-
ate properly and the
indicator
light may flash or theindicator
light may illuminate.
• The VDC system is not a substitute
for winter tires or tire chains on a
snow covered road.
RISE-UP AND BUILD-UP
The system gradually adjusts braking
power during normal braking to help pro-
vide an enhanced brake feel.
BRAKE FORCE DISTRIBUTION
During braking while driving through turns,
the system optimizes the distribution of
force to each of the front and rear wheels
depending on the radius of the turn.
5-132Starting and driving

WARNING
• The VDC system is designed to help
the driver maintain stability but does
not prevent accidents due to abrupt
steering operation at high speeds or
by careless or dangerous driving
techniques. Reduce vehicle speed
and be especially careful when driv-
ing and cornering on slippery sur-
faces and always drive carefully.
• Do not modif y the vehicle's suspen-
sion. If suspension parts such as
shock absorbers, struts, springs, sta-
bilizer bars, bushings and wheels are
not NISSAN recommended for your
vehicle or are extremely deterio-
rated, the VDC system may not oper-
ate properly. This could adversely af-
fect vehicle handling performance,
and the
indicator light may flash
or theindicator light may
illuminate.
• If brake related parts such as brake
pads, rotors and calipers are not
NISSAN recommended or are ex-
tremely deteriorated, the VDC sys-
tem may not operate properly and
the
indicator light may
illuminate. •
If engine control related parts are not
NISSAN recommended or are ex-
tremely deteriorated, the
indi-
cator light may illuminate.
• When driving on extremely inclined
surfaces such as higher banked cor-
ners, the VDC system may not oper-
ate properly and the
indicator
light may flash or theindicator
light may illuminate. Do not drive on
these types of roads.
• When driving on an unstable surface
such as a turntable, ferry, elevator or
ramp, the
indicator light may
flash or theindicator light may
illuminate. This is not a malfunction.
Restart the engine af ter driving onto
a stable surface.
• If wheels or tires other than the
NISSAN recommended ones are
used, the VDC system may not oper-
ate properly and the
indicator
light may flash or theindicator
light may illuminate.
• The VDC system is not a substitute
for winter tires or tire chains on a
snow covered road. The chassis control is an electric control
module that includes the following
functions:
• Intelligent Trace Control
• Active Ride Control
• Intelligent Engine Brake
INTELLIGENT TRACE CONTROL
This system senses driving based on the
driver’s steering and acceleration/braking
patterns, and controls brake pressure at
individual wheels to aid tracing at corners
and help smooth vehicle response.
When the VDC system is turned off, the In-
telligent Trace Control is also turned off.
If the chassis control warning message ap-
pears in the vehicle information display, it
may indicate that Intelligent Trace Control
is not functioning properly. Have the sys-
tem checked by a NISSAN dealer as soon
as possible. See “Vehicle information dis-
play warnings and indicators” (P. 2-26) or
(P. 2-41).
WARNING
The Intelligent Trace Control may not
be effective depending on the driving
condition. Always drive carefully and
attentively.
CHASSIS CONTROL
Starting and driving5-133

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