2021 NISSAN SENTRA battery replacement

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

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.
Key System Error: See Owner’s
Manual
Af ter the ignition switch is pushed to the
ON position, this light comes on for a period
of time and then turns off.
The Key System Error message warns of a
malfunction with the Intelligent Key sys-
tem. If the light comes on while the engine
is stopped, it may be impossible to start
the engine.
If the light comes on while the engine is
running, you can drive the vehicle. However,
in these cases, have the system checked. It
is recommended that you visit a NISSAN
dealer for this service.
Key Registration Complete
This appears when a new Intelligent Key is
registered to the vehicle.
Shif t to Park
This warning illuminates when the ignition
switch is in the AUTO ACC or OFF position
and the shif t lever is not in the P (Park)
position. Also, a chime sounds when the
ignition switch is in the AUTO ACC or OFF
position.
If this warning illuminates, move the shif t
lever to the P (Park) position and start the
engine.
Push Ignition to OFF
Af ter the Push Ignition to OFF warning illu-
minates, the warning will illuminate if the
ignition switch is placed in the AUTO ACC
position when the shif t lever is moved to
the P (Park) position.
To turn off the Push warning, place the ig-
nition switch in the ON position and then in
the LOCK position.
Push brake and start switch to drive
This indicator appears when the shif t lever
is in the P (Park) position.
This indicator also appears when the ve-
hicle has been started using the Remote
Engine Start (if so equipped) function.
This indicator means that the engine will
start by pushing the ignition switch withthe brake pedal depressed. You can start
the engine from any position of the ignition
switch.
Engine start operation for Intelligent
Key system (if I-Key battery level is
low)
This indicator appears when the battery of
the Intelligent Key is low and when the In-
telligent Key system and the vehicle are not
communicating normally.
If this appears, touch the ignition switch
with the Intelligent Key while depressing
the brake pedal. For additional information,
refer to “NISSAN Intelligent Key® battery dis-
charge” in the “Starting and driving” section
of this manual.
Release Parking Brake
This warning illuminates in the message
area of the vehicle information display
when the parking brake is set and the ve-
hicle is driven.
Low Fuel
This warning illuminates when the fuel level
in the fuel tank is getting low. Refuel as
soon as it is convenient, preferably before
the fuel gauge reaches 0 (Empty).
There
2-46Instruments and controls

CAUTION
• Be sure to carry the Intelligent Key
with you when operating the vehicle.
• Never leave the Intelligent Key in the
vehicle when you leave the vehicle.
The Intelligent Key is always communicat-
ing with the vehicle as it receives radio
waves. The Intelligent Key system trans-
mits weak radio waves. Environmental
conditions may interfere with the opera-
tion of the Intelligent Key system under the
following operating conditions:
• When operating near a location where strong radio waves are transmitted, such
as a TV tower, power station and broad-
casting station.
• When in possession of wireless equip- ment, such as a cellular telephone, trans-
ceiver or a CB radio.
• When the Intelligent Key is in contact with or covered by metallic materials.
• When any type of radio wave remote con- trol is used nearby.
• When the Intelligent Key is placed near an electric appliance such as a personal
computer.
• When the vehicle is parked near a parking meter. In such cases, correct the operating condi-
tions before using the Intelligent Key func-
tion or use the mechanical key.
Although the life of the battery varies de-
pending on the operating conditions, the
battery’s life is approximately two years. If
the battery is discharged, replace it with a
new one.
When the Intelligent Key battery is low, the
Intelligent Key system warning (
) will
show on the vehicle information display af-
ter the ignition switch is placed in the ON
position.
Since the Intelligent Key is continuously re-
ceiving radio waves, if the key is lef t near
equipment which transmits strong radio
waves, such as signals from a TV and per-
sonal computer, the battery life may be-
come shorter.
For information regarding replacement of
a battery, refer to “Battery replacement” in
the “Do-it-yourself ” section of this manual.
As many as four Intelligent Keys can be
registered and used with one vehicle. For
information about the purchase and use of
additional Intelligent Keys, it is recom-
mended that you visit a NISSAN dealer.

Audible reminder and warning
when locking the doors (if so
equipped)
When the chime or buzzer sounds from
inside and outside the vehicle, check for
the following:
• The ignition switch is placed in the LOCKposition.
• The Intelligent Key is not lef t inside the vehicle.
• The shif t lever is in the P (Park) position.
Audible reminder and warning
when the engine stops (if so
equipped)
When the Shif t P (Park) warning ()
shows in the vehicle information display:
• Make sure the shif t lever is in the P (Park) position.
When the chime sounds intermittently:
• Make sure the shif t lever is in the P (Park) position and the ignition switch is placed
in the LOCK position. If the chime sounds continuously when the
driver’s door is opened, check the following:
• The shif t lever is placed in the P (Park)
position and the ignition switch is placed
in the LOCK position.
• The warning chime may stop when one of the following is performed:
Returning the ignition switch to the LOCK
position.
Closing the doors.
Alarm and warning when the
engine starts
When the Intelligent Key system warning () shows and the outside buzzer
sounds, make sure the Intelligent Key is in-
side the vehicle.
Warning for low battery power
When the Intelligent Key battery is low, the
Intelligent Key system warning () will
show in the vehicle information display af-
ter the ignition switch is placed in the ON
position. This warning is to let you know
that the battery of the Intelligent Key will
run down soon. Replace it with a new one.
For additional information, refer to “Battery
replacement” in the “Do-it-yourself ” section
of this manual. It is recommended that you visit a NISSAN
dealer for battery replacement.
Preventing the Intelligent Key
from being lef t in the vehicle
If you lock all doors using the power door
lock switch with the Intelligent Key in the
vehicle, all of the doors unlock immediately
and the buzzer will warn you when the door
is closed.
Pre-driving checks and adjustments3-17

TROUBLESHOOTING GUIDE (Manual Transmission only)
SymptomPossible CauseRemedy
When the parking brake is fully applied The inside warning chime sounds con-
tinuously. The ignition switch is in the ACC or ON
position.Place the ignition switch in the OFF
position.
When opening the driver's door A warning chime sounds continuously. The ignition switch is in the ON posi-
tion.Place the ignition switch in the OFF
position.
When pushing the door handle re-
quest switch (if so equipped) to lock
the door The outside chime sounds for a few
seconds.
The Intelligent Key is inside the vehicle
or the trunk.Be sure to carry the Intelligent Key with
you.
When closing the doors The key warning light in the instrument
panel illuminates, the outside chime
sounds three times and the inside
warning chime sounds for approxi-
mately 3 seconds.
The ignition switch is in the ACC posi-
tion.
Place the ignition switch in the OFF
position.
The outside chime sounds for approxi-
mately 3 seconds and all doors unlock. The Intelligent Key is in the vehicle or
trunk.Be sure to carry the Intelligent Key with
you.
When pushing the ignition switch to
start the engine The key warning shows in the vehicle
information display.
The battery charge is low.Replace the battery with a new one.
For additional information, refer to
“Battery replacement” in the “Do-it-
yourself ” section of this manual.
Pre-driving checks and adjustments3-19

3. Replace the battery with a new one.Recommended battery: CR2032 or
equivalent.• Do not touch the internal circuit and electric terminals as doing so could
cause a malfunction.
• Hold the battery by the edges. Holding the battery across the contact points
will seriously deplete the storage ca-
pacity.
• Make sure that the + side faces the bottom of the lower part.
4. Close the lid securely as illustrated with
OCandOD.
5. Operate the buttons to check the operation.
If you need assistance with replacement, it
is recommended that you visit a NISSAN
dealer for this service.
FCC Notice:
For USA:
This device complies with Part 15 of the
FCC Rules. Operation is subject to the fol-
lowing two conditions: (1) This device
may not cause harmful interference, and
(2) this device must accept any interfer- ence received, including interference
that may cause undesired operation.
Note:
Changes or modifications not expressly
approved by the party responsible for
compliance could void the user’s author-
ity to operate the equipment.
For Canada:
This device complies with Industry
Canada licence-exempt RSS standard(s).
Operation is subject to the following two
conditions: (1) this device may not cause
interference, and (2) this device must ac-
cept any interference, including interfer-
ence that may cause undesired opera-
tion of the device.
HEADLIGHTS
For additional information on headlight
bulb replacement, refer to the instructions
outlined in this section.
Replacing the halogen headlight
bulb (if so equipped)
If halogen headlight bulb replacement is
required, it is recommended that you visit a
NISSAN dealer for this service.

Indicator lights and audible reminders
(See warning/indicator lights and audible
reminders)
...................3-16Inside automatic anti-glare mirror. . . .3-29Instrument brightness control.......2-60Instrument panel.............0-6, 2-2Instrument panel dimmer switch.....2-60Intelligent Around View Monitor......4-16Intelligent Cruise Control (ICC).......5-59Intelligent Driver Alertness (I-DA).....5-105Intelligent Forward Collision Warning
(I-FCW)......................5-92Intelligent Key system
Key operating range............3-9Key operation................3-10Mechanical key................3-3Remote keyless entry operation. . . .3-14Troubleshooting guide.......3-18,3-19Warning signals...........3-18,3-19Intelligent Trace Control (I-TC).......5-119Interior light...............2-74,2-75Interior trunk lid release...........3-24iPod® Player................. .4-57ISOFIX child restraints.............1-25
J
Jump starting...............6-9, 8-13
K
Key.........................3-2Key fob battery replacement........8-22
Keyless entry
With Intelligent Key system
(See Intelligent Key system)
.......3-14KeysNISSAN Intelligent Key®........3-2,3-7NISSAN Vehicle Immobilizer System
keys..................... .3-4
L
Labels
Air conditioner specification label. . .10-14C.M.V.S.S. certification label.......10-13Emission control information label. .10-13Engine serial number..........10-13F.M.V.S.S. certification label........10-13Tire and Loading Information label. .10-14Vehicle identification number (VIN). .10-12Vehicle identification number (VIN)
plate.................... .10-12Warning labels (for SRS)..........1-65Lane Departure Warning (LDW).......5-29LATCH (Lower Anchors and Tethers for
CHildren) System...............1-25Launch bar menu...............4-8License plate
Installing the license plate........10-14LightAir bag warning light........1-65, 2-14Brake light (See stop light)........8-26Bulb check/instrument panel......2-9Bulb replacement.............8-26Charge warning light...........2-10
Exterior and Interior lights........8-26Fog light switch...............2-61Fog lights..................8-25Headlight and turn signal switch. . . .2-55Headlight control switch.........2-55Headlights..................8-24Interior light..............2-74,2-75Light bulbs.................8-24Low tire pressure warning light.....2-11Low windshield-washer fluid warning
light................. .2-30, 2-47Spotlights (See map light)........2-75Trunk light..................2-76Warning/indicator lights and audible
reminders..................3-16Lights......................8-24Map lights..................2-75Lock
Child safety rear door lock.........3-7Door locks................. .3-4Fuel-filler door lock opener lever. . . .3-25Glove box lock...............2-67Power door locks..............3-6Trunk lid lock opener lever........3-24Loose fuel cap warning........2-29,2-47Low fuel warning light.........2-29,2-46Low tire pressure warning light.......2-11Low windshield-washer fluid warning
light................... .2-30, 2-47Luggage (See vehicle loading
information)..................10-15
11-4Index