2019 NISSAN ALTIMA sensor

Front passenger air bag
The front passenger air bag is designed to
automatically turn OFF when the vehicle is
operated under some conditions as de-
scribed below in accordance with U.S. regu-
lations. If the front passenger 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 bag 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 OFF in accor-
dance with the regulations. Also, if a child
restraint of the type specified in the regula-
tions is on the seat, its weight and the
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 pas-
senger 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 ex-
ample, 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 bag OFF. Always be sure to be
seated and wearing the seat belt properly
for the most effective 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 passenger knee air bag OFF for
specified child restraints as required by the
regulations. Failing to properly secure child
restraints and to use the ALR mode may
allow the restraint to tip or move in a colli-
sion or sudden stop. This can also result in
the passenger air bag and passenger knee
air bag inflating in a crash instead of beingOFF. For additional information about
proper use and installation, refer to “Child
restraints” in this section.
If the front passenger seat is not occupied,
the front passenger air bag and passenger
knee air bag are designed not to inflate in a
crash. However, heavy objects placed on
the seat could result in air bag inflation,
because of the object’s weight detected by
the occupant classification sensor. Other
conditions could also result in air bag infla-
tion, such as if a child is standing on the
seat, or if two children are on the seat, con-
trary to the instructions in this manual. Al-
ways be sure that you and all vehicle occu-
pants are seated and restrained properly.
Using the front passenger air bag status
light, you can monitor when the front pas-
senger air bag and passenger knee air bag
are automatically turned OFF.
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 passenger 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
Safety—Seats, seat belts and supplemental restraint system1-57

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 special
tool. 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” section of this manual. Sit upright, lean-
ing against the seatback, and centered
on the seat cushion with your feet com-
fortably 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” section of this manual.
Front passenger seat belt buckle sta-
tus is monitored by the occupant clas-
sification system, and is used as an in-
put to determine occupancy status. So,
it is highly recommended that the front
passenger fasten their seat belt.
4. Remain in this position for 30 seconds allowing the system to classif y the
front passenger before the vehicle is
put into motion.
5. Ensure proper classification by check- ing the front passenger air bag status
light.
1-58Safety—Seats, seat belts and supplemental restraint system

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 occupying the front passenger seat:
∙ Occupant is a small adult — the air bag light is functioning as intended. The
front passenger air bag and passenger
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
behind it.
∙ An object placed under the front pas- senger seat.
∙ An object placed between the seat cushion 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 con-
ditions 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 re-
straints” section of this manual.
∙ An object weighing over 9.1 lbs. (4 kg) hanging on the seat or placed in the
seatback pocket.
Safety—Seats, seat belts and supplemental restraint system1-59

∙ Modif ying or tampering with the frontpassenger seat may result in serious
personal injury. For example, do not
change the front seats by placing ma-
terial on the seat cushion or by install-
ing additional trim material, such as
seat covers, on the seat that are not
specifically designed to assure proper
air bag operation. Additionally, do not
stow any objects under the front pas-
senger seat or the seat cushion and
seatback. Such objects may interfere
with the proper operation of the occu-
pant classification sensor (weight
sensor).
∙ No unauthorized changes should be made to any components or wiring of
the seat belt system. This may affect
the front air bag system. Tampering
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 rec-
ommended that you visit a NISSAN
dealer for installation of electrical
equipment. The Supplemental Re-
straint System (SRS) wiring har-
nesses* should not be modified or dis-
connected. Unauthorized electrical
test equipment and probing devices
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 identifica-
tion.
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 inflate in higher severity side collisions,
LRS3142
Safety—Seats, seat belts and supplemental restraint system1-61

∙ If there is an impact to your vehiclefrom 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
impact. Failure to verif y proper OCS
function may result in an improper air
bag deployment resulting in injury or
death.
1-68Safety—Seats, seat belts and supplemental restraint system

Driver Assistance (if so equipped)
The driver assistance menu allows the user
to change the settings for driving, parking,
and braking aids.
Menu itemResult
Steering Assist (if so equipped) Allows user to turn the Steering Assist of the ProPILOT Assist system on or off. For additional information, please
refer to “ProPILOT Assist system” in the “Starting and driving” section of this manual.
Emergency Brake Displays available emergency braking options.
Front Allows user to turn the front emergency braking system on or off. For additional information, refer to “Automatic
Emergency Braking (AEB)” , “Automatic Emergency Braking (AEB) with Pedestrian Detection” and “Intelligent For-
ward Collision Warning (I-FCW)” in the “Starting and driving” section of this manual.
Rear (if so equipped) Allows user to turn the rear emergency braking system on or off. For additional information, refer to “Rear Auto-
matic Braking (RAB)” in the “Starting and driving” section of this manual.
Lane (if so equipped) Displays available lane options.
Lane Departure Warning Allows user to turn the Lane Departure Warning (LDW) system on or off. For additional information, refer to “Lane
Departure Warning (LDW)” in the “Starting and driving” section of this manual.
Lane Departure Prevention Allows user to turn Intelligent Lane Intervention (I-LI) system on or off. For additional information, refer to “Intelli- gent Lane Intervention (I-LI)” in the “Starting and driving” section of this manual.
Blind Spot (if so equipped) Displays available blind spot options.
Blind Spot Warning Allows user to turn the Blind Spot Warning (BSW) system on or off. For additional information, refer to “Blind Spot
Warning (BSW)” in the “Starting and driving” section of this manual.
Side Indicator Brightness Allows user to change the brightness of the side indicator.
Speed Limit Sign (if so equipped) Allows user to turn the Speed Limit Sign recognition on or off. For additional information, refer to “Traffic Sign Rec -
ognition” in the “Starting and driving” section of this manual.
Parking Aids (if so equipped) Displays available parking aids.
Auto Show Sonar Allows user to auto display the sonar. For additional information, refer to “Rear Sonar System (RSS)” in the “Starting
and driving” section of this manual.
Rear Allows user to turn the rear sonar on or off.
Distance Allows user to set the distance sensor range to Long/Medium/Short.
2-22Instruments and controls

Menu itemResult
Volume Allows the user to set the parking sensor volume to High/Medium/Low.
Rear Cross Traffic Alert Allows user to turn the Rear Cross Traffic Alert (RCTA) system on or off. For additional information, refer to “Rear
Cross Traffic Alert (RCTA)” in the “Starting and driving” section of this manual.
Driver Attention Alert Allows user to turn the Intelligent Driver Alertness on or off. For additional information, refer to “Intelligent Driver
Alertness (I-DA)” in the “Starting and driving” section of this manual.
Timer Alert (if so equipped) Allows user to set the timer alert.
Low Temperature Alert (if so equipped) Allows user to turn the low temperature alert on or off.
Chassis Control Displays available chassis control options.
Active Trace Control Allows user to turn the Intelligent Trace Control system on or off. For additional information, refer to “Intelligent
Trace Control (I-TC)” in the “Starting and driving” section of this manual.
TPMS Setting
The TPMS settings menu allows the user to
change the tire pressure units displayed in
the vehicle information display.
Menu item Result
TPMS Setting Displays available TPMS settings.
Tire Pressure Unit Allows user to select the tire pressure units that will display in the vehicle information display.
Clock
Menu item Result
Clock Allows user to adjust the clock settings and time within the vehicle information display. Adjustments that
can be made include automatically setting the time, 12H/24H format, Daylight Saving Time, time zone, and
manually setting the time.
The clock can also be set within the center display. For additional information, refer to the separate
NissanConnect® Owner’s Manual.
Instruments and controls2-23

VEHICLE INFORMATION DISPLAY
WARNINGS
1. No Key Detected
2. Key ID Incorrect
3. Key Battery Low
4. Key System Error: See Owner’s Manual
5. Key Registration Complete
6. Shif t to Park
7. Push ignition to OFF
8. Push brake and start switch to drive
9. Engine start operation for IntelligentKey system (if I-Key battery level is low)
10. Release Parking Brake
11. Low Fuel
12. Loose Fuel Cap
13. Low Oil Pressure: See Owner’s Manual
14. Low Washer Fluid (if so equipped)
15. Tire Pressure Low - Add Air
16. TPMS Error: See Owner’s Manual
17. Door Open
18. Trunk Open 19. Timer Alert – Have a break?
20. Low Outside Temperature
21. Power will turn off to save the battery
22. Power turned off to save the battery
23. Reminder: Turn OFF headlights
24. Headlight System Error: See Owner’s
Manual (if so equipped)
25. Parking Sensor Error: See Owner’s Manual (if so equipped)
26. Driver Attention Alert Malfunction
27. Malfunction: See Owner’s Manual (if so equipped)
28. Unavailable: Side Radar Obstruction (if so equipped)
29. Unavailable: High Camera Temperature (if so equipped)
30. Driver Attention Alert— Take a Break?
31. Malfunction (if so equipped)
32. Shipping Mode On Push Storage Fuse
33. Not Available: Parking Brake On (if so equipped)
34. CVT Error: See Owner’s Manual
35. Rear Door Alert is activated 36. Check Back Seat For All Articles
37. Intelligent Cruise Control (ICC) indica-
tors (if so equipped)
38. Intelligent Cruise Control (ICC) (for ve- hicles with ProPILOT Assist) indicators
(if so equipped)
39. Speed Limit Sign indicator (if so equipped)
40. System Fault (if so equipped)
41. Chassis Control System Error: See Owner’s Manual (if so equipped)
42. Not Available System Malfunction (if so equipped)
43. Not Available: Seat Belt Not Fastened (if so equipped)
44. Not Available: Front Radar Blocked (if so equipped)
45. Currently not available (if so equipped)
46. Not Available Poor Road Conditions (if so equipped)
47. Unavailable: High Cabin Temperature (if so equipped)
48. AWD Error: See Owner’s Manual (if so equipped)
2-32Instruments and controls