2023 NISSAN ALTIMA sensor

Front passenger air bag
The front passenger air bag and front pas-
senger supplemental knee air bag is de-
signed to automatically turn OFF when the
vehicle is operated under some conditions
as described below in accordance with U.S.
regulations. If the front passenger air bag
and front passenger supplemental knee
air bag is OFF, it will not inflate in a crash.
The driver air bag and other air bags in your
vehicle are not part of this system.
The purpose of the regulation is to help
reduce the risk of injury or death from an
inflating air bag to certain front passenger
seat occupants, such as children, by requir-
ing the air bags to be automatically turned
OFF. Certain sensors are used to meet the
requirements.
The occupant classification sensor in this
vehicle is a weight sensor. It is designed to
detect an occupant and objects on the
seat by weight. For example, if a child is in
the front passenger seat, the NISSAN Ad-
vanced Air Bag System is designed to turn
the front passenger air bag and front pas-
senger supplemental knee air bag OFF in
accordance with the regulations. Also, if a
child restraint of the type specified in the
regulations is on the seat, its weight andthe child’s weight can be detected and
cause the air bag to turn OFF.
Front passenger seat adult occupants who
are properly seated and using the seat belt
as outlined in this manual should not
cause the front passenger air bag and
front passenger supplemental knee air
bag to be automatically turned OFF. For
small adults it may be turned OFF, however
if the occupant takes his/her weight off the
seat cushion (for example, by not sitting
upright, by sitting on an edge of the seat, or
by otherwise being out of position), this
could cause the sensor to turn the air bags
OFF. Always be sure to be seated and wear-
ing the seat belt properly for the most ef-
fective protection by the seat belt and
supplemental air bag.
NISSAN recommends that pre-teens and
children be properly restrained in a rear
seat. NISSAN also recommends that ap-
propriate child restraints and booster
seats be properly installed in a rear seat. If
this is not possible, the occupant classifica-
tion sensor is designed to operate as de-
scribed above to turn the front passenger
air bag and front passenger supplemental
knee air bag OFF for specified child re-
straints as required by the regulations. Fail-
ing to properly secure child restraints andto use the ALR mode may allow the re-
straint to tip or move in a collision or sud-
den stop. This can also result in the passen-
ger air bag and front passenger
supplemental knee air bag inflating in a
crash instead of being OFF. For additional
information about proper use and installa-
tion, see “Child restraints” (P. 1-23).
If the front passenger seat is not occupied,
the front passenger air bag and front pas-
senger supplemental knee air bag are de-
signed not to inflate in a crash. However,
heavy objects placed on the seat could re-
sult in air bag inflation, because of the ob-
ject’s weight detected by the occupant
classification sensor. Other conditions
could also result in air bag inflation, such as
if a child is standing on the seat, or if two
children are on the seat, contrary to the
instructions in this manual. Always be sure
that you and all vehicle occupants are
seated and restrained properly.
Using the front passenger air bag status
light, you can monitor when the front pas-
senger air bag and front passenger
supplemental knee air bag are automati-
cally turned OFF.
1-58Safety-Seats, seat belts and supplemental restraint system

If an adult occupant is in the seat but the
front passenger air bag status light is illu-
minated (indicating that the front passen-
ger air bag and front passenger supple-
mental knee air bag are OFF), it could be
that the person is a small adult, or is not
sitting on the seat properly or not using the
seat belt properly.
If a child restraint must be used in the front
seat, the front passenger air bag status
light may or may not be illuminated, de-
pending on the size of the child and the
type of child restraint being used. If the air
bag status light is not illuminated (indicat-
ing that the air bag might inflate in a crash),
it could be that the child restraint or seat
belt is not being used properly. Make sure
that the child restraint is installed properly,
the seat belt is used properly and the occu-
pant is positioned properly. If the air bag
status light is still not illuminated, reposi-
tion the occupant or child restraint in a rear
seat.
If the front passenger air bag status light
will not illuminate even though you believe
that the child restraint, the seat belts and
the occupant are properly positioned, it is
recommended that you take your vehicle
to a NISSAN dealer. A NISSAN dealer can
check system status by using a specialtool. However, until you have confirmed
with a dealer that your air bag is working
properly, reposition the occupant or child
restraint in a rear seat.
The NISSAN Advanced Air Bag System and
front passenger air bag status light will
take a few seconds to register a change in
the front passenger seat status. This is nor-
mal system operation and does not indi-
cate a malfunction.
If a malfunction occurs in the front passen-
ger air bag system, the supplemental air
bag warning light
, located in the me-
ter and gauges area of the instrument
panel, will be illuminated (blinking or
steadily lit). Have the system checked. It is
recommended that you visit a NISSAN
dealer for this service.
Normal operation
In order for the occupant classification
sensor system to classif y the front passen-
ger based on weight, please follow the pre-
cautions and steps outlined below:
Precautions
• Make sure that there are no objects weighing over 9.1 lbs. (4 kg) hanging on
the seat or placed in the seatback pocket. • Make sure that a child restraint or other
object is not pressing against the rear of
the seatback.
• Make sure that a rear passenger is not pushing or pulling on the back of the front
passenger seat.
• Make sure that the front passenger seat or seatback is not forced back against an
object on the seat or floor behind it.
• Make sure that there is no object placed under the front passenger seat.
Steps
1. Adjust the seat as outlined in the “Seats” (P. 1-2) section of this manual. Sit upright,
leaning against the seatback, and cen-
tered on the seat cushion with your feet
comfortably extended to the floor.
2. Make sure there are no objects on your lap.
3. Fasten the seat belt as outlined in the “Seat belts” (P. 1-12) section of this
manual. Front passenger seat belt
buckle status is monitored by the occu-
pant classification system, and is used
as an input to determine occupancy
status. So, it is highly recommended that
the front passenger fasten their seat
belt.
Safety-Seats, seat belts and supplemental restraint system1-59

4. Remain in this position for 30 secondsallowing the system to classif y the front
passenger before the vehicle is put into
motion.
5. Ensure proper classification by checking the front passenger air bag status light.
NOTE:
This vehicle’s occupant classification
sensor system generally keeps the clas-
sification locked during driving, so it is
important that you confirm that the
front passenger is properly classified
prior to driving. However, the occupant
classification sensor may recalculate the
weight of the occupant under some con-
ditions (both while driving and when
stopped), so front passenger seat occu-
pants should continue to remain seated
as outlined above.
Troubleshooting
If you think the front passenger air bag
status light is incorrect:
1. If the light is ON with an adult occupyingthe front passenger seat:
•
Occupant is a small adult — the air bag light
is functioning as intended. The front pas-
senger air bag and front passenger supple-
mental knee air bag are suppressed.
However, if the occupant is not a small
adult, then this may be due to the following
conditions that may be interfering with the
weight sensors:
• Occupant is not sitting upright, leaning against the seatback, and centered on
the seat cushion with his/her feet com-
fortably extended to the floor.
• A child restraint or other object pressing against the rear of the seatback.
• A rear passenger pushing or pulling on the back of the front passenger seat.
• Forcing the front seat or seatback against an object on the seat or floor be-
hind it.
• An object placed under the front passen- ger seat.
• An object placed between the seat cush- ion and center console or between the
seat cushion and the door.
If the vehicle is moving, please come to a
stop when it is safe to do so. Check and
correct any of the above conditions. Re-
start the vehicle and wait 1 minute.NOTE:
A system check will be performed during
which the front passenger air bag status
light will remain lit for about 7 seconds
initially.
If the light is still ON af ter this, the person
should be advised not to ride in the front
passenger seat and the vehicle should be
checked as soon as possible. It is recom-
mended that you visit a NISSAN dealer for
this service.
2. If the light is OFF with a small adult, child or child restraint occupying the front
passenger seat.
This may be due to the following condi-
tions that may be interfering with the
weight sensors:
• Small adult or child is not sitting upright, leaning against the seatback, and cen-
tered on the seat cushion with his/her
feet comfortably extended to the floor.
• The child restraint is not properly in- stalled, as outlined in the “Child restraints”
section of this manual.
• An object weighing over 9.1 lbs. (4 kg) hanging on the seat or placed in the seat-
back pocket.
1-60Safety-Seats, seat belts and supplemental restraint system

•Modif ying or tampering with the
front passenger seat may result in
serious personal injury. For example,
do not change the front seats by
placing material on the seat cushion
or by installing additional trim mate-
rial, such as seat covers, on the seat
that are not specifically designed to
assure proper air bag operation. Ad-
ditionally, do not stow any objects
under the front passenger seat or the
seat cushion and seatback. Such ob-
jects may interfere with the proper
operation of the occupant classifica-
tion sensor (weight sensor).
• No unauthorized changes should be
made to any components or wiring
of the seat belt system. This may af-
fect the front air bag system. Tam-
pering with the seat belt system may
result in serious personal injury. •
It is recommended that you visit a
NISSAN dealer for work on and
around the front air bag system. It is
also recommended that you visit a
NISSAN dealer for installation of elec-
trical equipment. The Supplemental
Restraint System (SRS) wiring har-
nesses* should not be modified or
disconnected. Unauthorized electri-
cal test equipment and probing de-
vices should not be used on the air
bag system.
• A cracked windshield should be re-
placed immediately by a qualified re-
pair facility. A cracked windshield
could affect the function of the
supplemental air bag system.
*The SRS wiring harness connectors are
yellow and orange for easy
identification.
When selling your vehicle, we request that
you inform the buyer about the front air
bag system and guide the buyer to the
appropriate sections in this Owner's
Manual.
Front and rear outboard
seat-mounted side-impact
supplemental air bag and
roof-mounted curtain
side-impact and rollover
supplemental air bag systems
The side air bags are located in the outside
of the seatback of the front and rear out-
board seats. The curtain air bags are lo-
cated in the side roof rails. All of the infor-
mation, cautions and warnings in this
manual must be followed. The side air
bags and curtain air bags are designed to
LRS3142
1-62Safety-Seats, seat belts and supplemental restraint system

•If there is an impact to your vehicle
from any direction, your Occupant
Classification Sensor (OCS) should be
checked to verif y it is still functioning
correctly. It is recommended that you
visit a NISSAN dealer for this service.
The OCS should be checked even if no
air bags deploy as a result of the im-
pact. Failure to verif y proper OCS
function may result in an improper
air bag deployment resulting in in-
jury or death.
Safety-Seats, seat belts and supplemental restraint system1-69

Driver Assistance
The driver assistance menu allows the user to change the settings for driving, parking, and braking aids.
Some menu items shown below may not be equipped on your vehicle.
Menu itemExplanation
Driving Aids Displays available driving aids. Emergency Brake Displays available emergency brake options. Front Allows the user to turn the emergency braking system on or off. For additional information, see “Automatic Emer- gency Braking (AEB) with Pedestrian Detection ” (P. 5-135) and “Intelligent Forward Collision Warning (I-FCW)”
(P. 5-147).
Rear Allows the user to turn the rear emergency braking system on or off. For additional information, see “Rear Auto- matic Braking (RAB)” (P. 5-127).
Lane Displays available lane options. Lane (LDW) Allows the user to turn the Lane Departure Warning (LDW) system on or off. For additional information, see “Lane Departure Warning (LDW)” (P. 5-33).
Blind Spot Displays available emergency brake options. Blind Spot (BSW) Allows the user to turn the Blind Spot Warning (BSW) system on or off. For additional information, see “Blind Spot Warning (BSW) ” (P. 5-46).
Indicator Brightness Allows user to change the brightness of the side indicator.
Driver Attention Allows user to turn the Intelligent Driver Alertness on or off. For additional information, see “Intelligent Driver Alert- ness” (P. 5-162).
Parking Aids Displays available parking aids. Cross Traffic Allows user to turn the Rear Cross Traffic Alert (RC TA) system on or off. For additional information, see “ Rear Cross
Traffic Alert (RCTA)” (P. 5-58).
Rear Sensor Allows user to turn the rear sonar on or off.
Display Allows user to turn the display on or off.
Volume Allows the user to set the parking sensor volume to High/Med./Low.
Range Allows user to set the distance sensor range to Far/Mid./Near.
Chassis Control Displays available chassis control options. Trace Control Allows user to turn the Intelligent Trace Control system on or off. For additional information, see “ Intelligent Trace Control (I-TC)” (P. 5-178).
2-22Instruments and controls

cruise control is on and canceled, the
speed will be displayed to show the speed
the vehicle will return to if the resume but-
ton is activated.
Forward Driving Aids Temporarily
Disabled Front Sensor Blocked See
Owner’s Manual
This message appears when the front ra-
dar sensor may be obstructed due to:
• mud, dirt, snow, ice, etc.
• inclement weather (rain, fog, snow, etc.).
All forward driving aids are temporarily dis-
abled until the system detects that the
front radar sensor is no longer obstructed.
For additional information, see:
• Automatic Emergency Braking (AEB) withPedestrian Detection (P. 5-135).
• Intelligent Forward Collision Warning (I- FCW) (P. 5-147).
Driver Attention Alert
Malfunction
This warning appears when the Intelligent
Driver Alertness (I-DA) system is not func-
tioning properly. For additional information,
see “Intelligent Driver Alertness (I-DA)”
(P. 5-162).
Intelligent Driver
Alertness— Take a break?
This alert appears when the system has
detected that the driver may be displaying
fatigue or a lack of attention.
Lane Departure Warning
(LDW) indicator
This indicator appears when the LDW sys-
tem is engaged.
For additional information, see “Lane De-
parture Warning (LDW)” (P. 5-33).
Malfunction See Owner’s Manual
This warning appears when one of the fol-
lowing systems (if so equipped) is not func-
tioning properly:
• Automatic Emergency Braking (AEB) withPedestrian Detection
• Blind Spot Warning (BSW)
• Driver Attention Alert
• Intelligent Forward Collision Warning (I-FCW)
• Lane Departure Warning (LDW)
• Rear Automatic Braking (RAB)
• Rear Cross Traffic Alert (RCTA) If one or more of these warning appears,
have the system checked. It is recom-
mended that you visit a NISSAN dealer for
this service.
For additional information, see “Automatic
Emergency Braking (AEB) with Pedestrian
Detection” (P. 5-135), “Blind Spot Warning
(BSW)” (P. 5-46), “Intelligent Driver Alertness
(I-DA)” (P. 5-162), “Intelligent Forward Colli-
sion Warning (I-FCW)” (P. 5-147), “Lane Depar-
ture Warning (LDW)” (P. 5-33), “Rear Auto-
matic Braking (RAB)” (P. 5-127) and “Rear
Cross Traffic Alert (RCTA)” (P. 5-58).Parking Sensor Error: See Owner’s
Manual
This warning appears when there is an er-
ror with the system. For additional informa-
tion, see “Rear Sonar System (RSS)”
(P. 5-180).
Rear Automatic Braking
(RAB) indicator
This indicator appears to indicate the sta-
tus of the Rear Automatic Braking (RAB)
system. For additional information, see
“Rear Automatic Braking (RAB)” (P. 5-127).
Instruments and controls2-33

Driver Assistance
The driver assistance menu allows the user to change the settings for driving, parking, and braking aids.
Some menu items shown below may not be equipped on your vehicle.
Menu itemExplanation
Steering Assist Allows user to turn the Steering Assist of the ProPILOT Assist system on or off. For additional information, please
see “ProPILOT Assist” (P. 5-94).
Emergency Brake Displays available emergency braking options.
Front Allows user to turn the front emergency braking system on or off. For additional information, see “Automatic
Emergency Braking (AEB) with Pedestrian Detection” (P. 5-135) and “Intelligent Forward Collision Warning (I-FCW)”
(P. 5-147).
Rear Allows user to turn the rear emergency braking system on or off. For additional information, see “Rear Automatic
Braking (RAB)” (P. 5-127).
Lane Displays available lane options.
Lane Departure Warning Allows user to turn the Lane Departure Warning (LDW) system on or off. For additional information, see “Lane De-
parture Warning (LDW)” (P. 5-33).
Lane Departure Prevention Allows user to turn Intelligent Lane Intervention (I-LI) system on or off. For additional information, see “Intelligent Lane Intervention (I-LI)” (P. 5-40).
Blind Spot Displays available blind spot options.
Blind Spot Warning Allows user to turn the Blind Spot Warning (BSW) system on or off. For additional information, see “Blind Spot
Warning (BSW)” (P. 5-46).
Side Indicator Brightness Allows user to change the brightness of the side indicator.
Speed Limit Sign Allows user to turn the Speed Limit Sign recognition on or off. For additional information, see “Traffic Sign Recogni-
tion (TSR)” (P. 5-30).
Parking Aids Displays available parking aids.
Auto Show Sonar Allows user to auto display the sonar. For additional information, see “Rear Sonar System (RSS)” (P. 5-179).
Rear Allows user to turn the rear sonar on or off.
Distance Allows user to set the distance sensor range to Long/Medium/Short.
Volume Allows the user to set the parking sensor volume to High/Medium/Low.
2-38Instruments and controls