2021 NISSAN SENTRA sensor

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 front passenger air bag and
passenger knee 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 occupant is positioned properly. If the
air bag status light is still not illuminated,
reposition the occupant or child restraint in
arearseat.
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 inthe 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 status is
monitored by the occupant classifica-
tion system, and is used as an input to
determine occupancy status. So, it is
highly recommended that the front pas-
senger 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 checking the front passenger air bag status light.
Safety-Seats, seat belts and supplemental restraint system1-57

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
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 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.
1-58Safety-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. 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
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 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
LRS3142
1-60Safety-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 system1-67

8. Engine start operation for Intelligent Keysystem (if I-Key battery level is low)
9. Release Parking Brake
10. Low Fuel
11. Loose Fuel Cap
12. Low Oil Pressure: See Owner’s Manual
13. Low Washer Fluid
14. Tire Pressure Low — Add Air
15. TPMS Error: See Owner’s Manual
16. Door/Trunk Open
17. Power will turn off to save the battery
18. Power turned off to save the battery
19. Reminder: Turn OFF Headlights
20. Headlight System Error: See Owner’s Manual (if so equipped)
21. Engine Oil Service due in---km
22. BSW/RCTA System Malfunction: See Owner’s Manual
23. Side Radar Obstruction
24. Check Rear Seat for All Articles
25. Rear Door Alert is activated
26. Shipping Mode On Push Storage Fuse 27. Not Available Poor Road Conditions (if
so equipped)
28. CVT Malfunction Service now
29. Illumination indicator
30. Outside Temperature Display
31. Low Outside Temperature (if so equipped)
32. Unavailable: Front Radar Obstruction
33. ECO mode indicator
34. Parking Sensor Error-See Owner’s Manual
35. Not Available System Malfunction (if so equipped)
36. Unavailable High Cabin Temperature
37. Currently not available (if so equipped)
38. Rear seat belt reminder
39. Rotate Steering Wheel and Push Start Switch
40. No Key Press and hold to Stop Engine
41. Speed Limit Sign (if so equipped)
42. Driver Attention Alert —Take a Break?
43. Driver Attention Alert MalfunctionNo Key Detected
This warning appears when the Intelligent
Key is lef t outside the vehicle with the igni-
tion switch in the ON position. Make sure
the Intelligent Key is inside the vehicle.
For additional information, refer to “NISSAN
Intelligent Key®” in the “Pre-driving checks
and adjustments” section of this manual.
Key ID Incorrect
This warning appears when the ignition
switch is placed from the OFF position and
the Intelligent Key is not recognized by the
system. You cannot start the engine with
an unregistered key.
For additional information, refer to “NISSAN
Intelligent Key®” in the “Pre-driving checks
and adjustments” section of this manual.
Key Battery Low
This indicator illuminates when the Intelli-
gent Key battery is running out of power.
If this indicator illuminates, replace the bat-
tery with a new one. For additional infor-
mation, refer to “Battery replacement” in
the “Do-it-yourself ” section of this manual.
2-28Instruments and controls

CVT Malfunction Service now
This warning illuminates when there is a
problem with the CVT system. If this warn-
ing comes on, have the system checked. It
is recommended that you visit a NISSAN
dealer for this service.
Illumination indicator
This indicator appears when the vehicle
information display screen brightness is
being adjusted.
Outside Temperature Display
The outside temperature display appears
in the center region of the vehicle informa-
tion display.
Low Outside Temperature (if so
equipped)
This warning appears if the outside tem-
perature is below 37°F (3°C). The tempera-
ture can be changed to display in Celsius or
Fahrenheit. For additional information, re-
fer to “Settings” in this section.
Unavailable: Front Radar Obstruction
This warning appears when one or more of
the following systems is not functioning
properly:
• Automatic Emergency Braking with Pe-destrian Detection • Intelligent Forward Collision Warning (I-
FCW)
If one or more of these warnings appear,
have the system checked. It is recom-
mended that you visit a NISSAN dealer for
this service. For additional information, re-
fer to “Automatic Emergency Braking with
Pedestrian Detection” or “Intelligent For-
ward Collision Warning (I-FCW)” in the
“Starting and driving” section of this
manual.
ECO mode indicator
This indicator shows when the ECO mode
is engaged.
For additional information, refer to “ECO
mode” in the “Starting and driving” section
of this manual.
Parking Sensor Error: See Owner’s
Manual
This warning illuminates when there is an
error with the system. For additional infor-
mation, refer to “Rear Sonar System (RSS)”
in the “Starting and driving” section of this
manual.
Not Available System Malfunction (if
so equipped)
This warning appears when one or more of
the following systems (if so equipped) is
not functioning properly.
• Intelligent Cruise Control (ICC)
• Blind Spot Warning (BSW)
• Lane Departure Warning (LDW)
If one or more of these warnings appear,
have the system checked. It is recom-
mended that you visit a NISSAN dealer for
this service.
For additional information, refer to "Intelli-
gent Cruise Control (ICC)”, “Blind Spot Warn-
ing (BSW)” or “Lane Departure Warning
(LDW)” in the “Starting and driving” section
of this manual.
Unavailable: High Camera
Temperature (if so equipped)
This message appears when the camera
detects an interior temperature of more
than 104°F (40°C). For additional informa-
tion, refer to “Traffic Sign Recognition (TSR)”
in the “Starting and driving” section of this
manual.
2-32Instruments and controls

10. Release Parking Brake
11. Low Fuel
12. Loose Fuel Cap
13. Engine Oil Service due in–––km
14. Low Washer Fluid (if so equipped)
15. Tire Pressure Low - Add Air
16. Door/ Trunk Open
17. Timer Alert —Time for a break?
18. Low outside temperature indicator
19. Power will turn off to save the battery
20. Power turned off to save the battery
21. Reminder: Turn OFF Headlights
22. Headlight System Error See Owner’sManual (if so equipped)
23. Parking Sensor Error: See Owner’s Manual
24. Driver Attention Alert— Take a Break?
25. Driver Attention Alert Malfunction
26. Malfunction: See Owner’s Manual
27. Unavailable: Side Radar Obstruction
28. Malfunction (if so equipped) 29. Shipping Mode On Push Storage Fuse
30. Intelligent Cruise Control (ICC) indica-
tors (if so equipped)
31. CVT (AT) Malfunction Service now (if so equipped)
32. CVT (AT) hot Power reduced (if so equipped)
33. Chassis Control System Error: See Owner’s Manual (if so equipped)
34. Not Available System Malfunction
35. Not Available Front Radar Blocked
36. Currently not available (if so equipped)
37. Not Available Poor Road Conditions (if so equipped)
38. Unavailable: High Cabin Temperature
39. Rear Door Alert is activated
40. Check Rear Seat For All Articles
41. Rear seat belt reminder
42. Rotate Steering Wheel and Push Start Switch
43. No Key Press and hold to Stop Engine
44. Speed Limit Sign (if so equipped)
45. Brightness indicator 46. Engine Stalled Stop safely
47. Engine Malfunction Power reduced Ser-
vice now
48. Engine Malfunction Service now
49. Engine hot Power reduced
No Key Detected
This warning appears when the Intelligent
Key is lef t outside the vehicle with the igni-
tion switch in the ON position. Make sure
the Intelligent Key is inside the vehicle.
For additional information, refer to “NISSAN
Intelligent Key®” in the “Pre-driving checks
and adjustments” section of this manual.
Key ID Incorrect
This warning appears when the ignition
switch is placed from the OFF position and
the Intelligent Key is not recognized by the
system. You cannot start the engine with
an unregistered key.
For additional information, refer to “NISSAN
Intelligent Key®” in the “Pre-driving checks
and adjustments” section of this manual.
Instruments and controls2-45

Parking Sensor Error: See Owner’s
Manual
This warning illuminates when there is an
error with the system. For additional infor-
mation, refer to “Rear Sonar System (RSS)”
in the “Starting and driving” section of this
manual.
Driver Attention Alert— Take a Break?
This alert appears when the system has
detected that the driver may be displaying
fatigue or a lack of attention.
Driver Attention Alert Malfunction
This warning appears when the Intelligent
Driver Alertness system is not functioning
properly. For additional information, refer to
“Intelligent Driver Alertness (I-DA)” in the
“Starting and driving” section of this
manual.
Malfunction: See Owner’s Manual
This warning appears when one or more of
the following systems are not functioning
properly:
• Rear Cross Traffic Alert (RCTA)
• Blind Spot Warning (BSW)If one or more of these warnings appear,
have the system checked. It is recom-
mended that you visit a NISSAN dealer for
this service.
Unavailable: Side Radar Obstruction
This message appears when the Blind
Spot Warning (BSW)/Rear Cross Traffic Alert
(RCTA) systems become unavailable be-
cause a radar blockage is detected. For
additional information, refer to “Blind Spot
Warning (BSW)” or “Rear Cross Traffic Alert
(RCTA)” in the “Starting and driving” section
of this manual.
Malfunction
This warning appears when the Automatic
Emergency Braking with Pedestrian Detec-
tion system or Intelligent Forward Collision
Warning (I-FCW) system is not functioning
properly.
If one or more of these warnings appears,
have the system checked. It is recom-
mended that you visit a NISSAN dealer for
this service.
For additional information, refer to “Auto-
matic Emergency Braking with Pedestrian
Detection” or “Intelligent Forward Collision
Warning (I-FCW)” in the “Starting and driv-
ing” section of this manual.
Shipping Mode On Push Storage Fuse
This warning may appear if the extended
storage switch is not pushed in. When this
warning appears, push in the extended
storage switch to turn off the warning. For
additional information, refer to “Extended
storage switch” in this section.
Intelligent Cruise Control (ICC)
indicators (if so equipped)
These indicators show the Intelligent
Cruise Control (ICC) system status. The sta-
tus is shown by color. For additional infor-
mation, refer to “Intelligent Cruise Control
(ICC)” in the “Starting and driving” section of
this manual.
CVT (AT) Malfunction Service now (if
so equipped)
This warning illuminates when there is a
problem with the CVT system. If this warn-
ing comes on, have the system checked. It
is recommended that you visit a NISSAN
dealer for this service.
CVT (AT) hot Power reduced (if so
equipped)
This transmission has a high fluid tem-
perature protection mode. If the fluid tem-
perature becomes too high (for example,
2-48Instruments and controls