battery NISSAN SENTRA 2021 Service Manual

• If the battery is labeled “do not open” it ismaintenance free and battery fluid
should not be checked. It is recom-
mended that you visit a NISSAN dealer or
a qualified specialist workshop to con-
firm the battery’s performance.
• Keep the battery surface clean and dry. Clean the battery with a solution of bak-
ing soda and water.
• Make certain the terminal connections are clean and securely tightened.
• If the vehicle is not to be used for 30 days or longer, disconnect the negative (-) bat-
tery terminal cable to prevent discharge.
NOTE:
Care should be taken to avoid situations
that can lead to potential battery dis-
charge and potential no-start conditions
such as:
1. Installation or extended use of elec-
tronic accessories that consume bat-
tery power when the engine is not run-
ning (Phone chargers, GPS, DVD
players, etc.)
2. Vehicle is not driven regularly and/or
only driven short distances.
In these cases, the battery may need to
be charged to maintain battery health.
WARNING
• Do not expose the battery to flames,
an electrical spark or a cigarette. Hy-
drogen gas generated by the battery
is explosive. Explosive gases can
cause blindness or injury. Do not al-
low battery fluid to contact your skin,
eyes, fabrics or painted surfaces. Sul-
furic acid can cause blindness or in-
jury. Af ter touching a battery or bat-
tery cap, do not touch or rub your
eyes. Thoroughly wash your hands. If
the acid contacts your eyes, skin or
clothing, immediately flush with wa-
ter for at least 15 minutes and seek
medical attention.
• When working on or near a battery,
always wear suitable eye protection
and remove all jewelry.
• Battery posts, terminals and related
accessories contain lead and lead
compounds. Wash hands af ter
handling.
• Keep battery out of the reach of
children.
• Do not tip the battery.
NOTE:
Do not try to open the top of the battery.
This battery is not equipped with remov-
able vent caps.
JUMP STARTING
If jump starting is necessary, refer to “Jump
starting” in the “In case of emergency” sec-
tion of this manual. If the engine does not
start by jump starting, the battery may
have to be replaced. It is recommended
that you visit a NISSAN dealer for this
service.
LDI3302

CAUTION
• Do not ground accessories directly to
the battery terminal. Doing so will
bypass the variable voltage control
system and the vehicle battery may
not charge completely.
• Use electrical accessories with the
engine running to avoid discharging
the vehicle battery. Your vehicle is equipped with a variable
voltage control system. This system mea-
sures the amount of electrical discharge
from the battery and controls voltage gen-
erated by the generator.
The current sensor
OAis located near the
battery along the negative battery cable. If
you add electrical accessories to your ve-
hicle, be sure to ground them to a suitable
body ground such as the frame or engine
block area.
1. Automatic tensioner pulley
2. Generator pulley
3. Water pump pulley
4. Air conditioner compressor pulley (if so
equipped/Idler pulley (if so equipped)
5. Crankshaf t pulley
WDI0638
VARIABLE VOLTAGE CONTROL
SYSTEM DRIVE BELT

Extended storage switch
The extended storage switch is located in
the fuse box in the passenger compart-
ment, on the lower side of the instrument
panel.
To inspect the extended storage switch,
ensure the ignition switch and headlight
switch are OFF.
If any electrical equipment does not oper-
ate, ensure the extended storage switch
OAis pushed fully in ON position as shown.
NOTE:
The extended storage switch is used for
long term vehicle storage.
CAUTION
Be careful not to allow children to swal-
low the battery or removed parts.

NISSAN INTELLIGENT KEY®
Replace the battery in the Intelligent Key as
follows:
1. Remove the mechanical key from theIntelligent Key.
2. Insert a small flathead screwdriver
OA
into the slitOBof the corner and twist it
to separate the upper part from the
lower part. Place a cloth over the screw-
driver to protect the casing.
LDI2001LDI2637

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.

Parking brake:Check the parking brake
operation regularly. The vehicle should be
securely held on a fairly steep hill with only
the parking brake applied. If the parking
brake needs adjustment, it is recom-
mended that you visit a NISSAN dealer for
this service.
Seats: Check seat position controls such
as seat adjusters, seatback recliner, etc., to
ensure they operate smoothly and all
latches lock securely in every position.
Check that the head restraints/headrests
move up and down smoothly and the locks
(if so equipped) hold securely in all latched
positions.
Seat belts: Check that all parts of the seat
belt system (for example, buckles, anchors,
adjusters and retractors) operate properly
and smoothly, and are installed securely.
Check the belt webbing for cuts, fraying,
wear or damage.
Steering wheel: Check for changes in the
steering system, such as excessive free
play, hard steering or strange noises.
Warning lights and chimes: Make sure all
warning lights and chimes are operating
properly.
Windshield defroster: Check that the air
comes out of the defroster outlets properly and in sufficient quantity when operating
the heater or air conditioner.
Windshield wiper and washer*:
Check
that the wipers and washer operate prop-
erly and that the wipers do not streak.
Under the hood and vehicle
The maintenance items listed here should
be checked periodically (for example, each
time you check the engine oil or refuel).
Battery*: This vehicle is equipped with a
sealed maintenance free battery. It is rec-
ommended that you visit a NISSAN dealer
for service.
NOTE:
Care should be taken to avoid situations
that can lead to potential battery dis-
charge and potential no-start conditions
such as:
1. Installation or extended use of elec-
tronic accessories that consume bat-
tery power when the engine is not run-
ning (Phone chargers, GPS, DVD
players, etc.).
2. Vehicle is not driven regularly and/or
only driven short distances. In these cases, the battery may need to
be charged to maintain battery health.
Brake and clutch (if so equipped) fluid
level*:
Make sure that the brake and clutch
fluid levels are between the MIN and MAX
lines on the reservoir.
Engine coolant level*: Check the coolant
level when the engine is cold.
Engine drive belt*: Make sure the drive belt
is not frayed, worn, cracked or oily.
Engine oil level*: Check the level af ter
parking the vehicle on a level surface with
the engine off. Wait more than 15 minutes
for the oil to drain back into the oil pan.
Exhaust system: Make sure there are no
loose supports, cracks or holes. If the
sound of the exhaust seems unusual or
there is a smell of exhaust fumes, immedi-
ately have the exhaust system inspected. It
is recommended that you visit a NISSAN
dealer for this service. For additional infor-
mation, refer to “Exhaust gas (carbon mon-
oxide)” in the “Starting and driving” section
of this manual.
9-4Maintenance and schedules

STANDARD MAINTENANCE
Abbreviations: I = Inspect and correct or replace as necessary, R = ReplaceMAINTENANCE OPERATION
Perform at number of miles, kilometers or months, whichever comes first. Miles x 1,000
(km x 1,000) Months MAINTENANCE INTERVAL
7. 5
(12) 6 15
(24) 12 22.5
(36) 18 30
(48) 24 37.5
(60) 30 45
(72) 36 52.5
(84) 42 60
(96) 48 67.5
(108) 54 75
(120) 60 82.5
(132) 66 90
(144) 72 97.5
(156) 78 105
(168) 84 112.5
(180) 90 120
(192) 96
Air cleaner filter NOTE (1) R R R R
Brake fluid RRRR
Brake lines and cables I I I I I I I I
Brake pads and rotors III IIIII
CVT fluid NOTE (2) I I I I I I I I
Drive belts NOTE (3) I* I* I* I* I*
Engine coolant* NOTE (4)(5)
Engine oil & oil filter  R RRRRRR RRRRRRRRR
EVAP vapor lines & fuel lines I* I* I* I*
Exhaust system IIII
Front drive shaf t boots  III IIIII
Fuel filter NOTE (6)
In-cabin microfilter R R R R R R R R
Intake & exhaust valve clearance* NOTE (7)
Manual transmission gear oil NOTE (8) I I I I I I I I
NISSAN Intelligent Key® battery I R R R R
Spark plugs (Iridium/Platinum — tipped type) NOTE (9) Replace every 105,000 miles (168,000 km)
Steering gear & linkage, axle & suspension parts IIII
Tire rotation NOTE (10)
9-8Maintenance and schedules

safety from http://
www.safercar.gov.
You may notif y NISSAN by contact-
ing our Consumer Affairs Depart-
ment, toll-free, at 1-800-NISSAN-1.
For Canada
If you believe that your vehicle has a
defect which could cause a crash or
could cause injury or death, you
should immediately inform Trans-
port Canada in addition to notif ying
NISSAN.
If Transport Canada receives com-
plaints, it may open an investigation,
and if it finds that a safety defect
exists in a group of vehicles, it may
request that NISSAN conduct a recall
campaign. However, Transport
Canada cannot become involved in
individual problems between you,
your dealer, or NISSAN.You may contact Transport Cana-
da's Defect Investigations and Re-
calls Division toll free at 1-800-333-
0510. You may also report safety
defects online at: https://
wwwapps.tc.gc.ca/Saf-Sec-Sur/7/
PCDB-BDPP/fc-cp.aspx?lang=eng
(English speakers) or https://
wwwapps.tc.gc.ca/Saf-Sec-Sur/7/
PCDB-BDPP/fc-cp.aspx?lang=fra
(French speakers)
Additional information concerning
motor vehicle safety may be ob-
tained from Transport Canada's
Road Safety Information Centre at
1-800-333-0371 or online at
www.tc.gc.ca/roadsafety (English
speakers) or www.tc.gc.ca/
securiteroutiere (French speakers).
To notif y NISSAN of any safety con-
cerns please contact our Consumer
Information Centre toll free at 1-800-
387-0122.Due to legal requirements in some states
and Canadian Provinces, your vehicle may
be required to be in what is called the
“ready condition” for an Inspection/
Maintenance (I/M) test of the emission
control system.
The vehicle is set to the “ready condition”
when it is driven through certain driving
patterns. Usually, the ready condition can
be obtained by ordinary usage of the ve-
hicle.
If a powertrain system component is re-
paired or the battery is disconnected, the
vehicle may be reset to a “not ready ” condi-
tion. Before taking the I/M test, check the
vehicle's inspection/maintenance test
readiness condition. Place the ignition
switch in the ON position without starting
the engine. If the Malfunction Indicator
Light (MIL) comes on steady for 20 seconds
and then blinks for 10 seconds , the I/M test
condition is “not ready”. If the MIL does not
blink af ter 20 seconds, the I/M test condi-
tion is “ready ”. It is recommended that you
visit a NISSAN dealer to set the “ready con-
dition” or to prepare the vehicle for testing.
READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST
Technical and consumer information10-21

Engine Block Heater.............5-127Engine coolant temperature gauge. . . .2-6Event Data recorders............10-22Exhaust gas (Carbon monoxide)......5-4Explanation of maintenance items.....9-2Explanation of scheduled maintenance
items.......................9-5Extended storage switch..........8-22Eyeglass case.................2-68
F
F.M.V.S.S. certification label.........10-13Flashers (See hazard warning flasher
switch)......................6-2Flat tire.................. .6-3, 6-4Floor mat positioning aid...........7-6Fluid
Brake fluid..................8-10Capacities and recommended
fuel/lubricants...............10-2Clutch fluid..................8-11Continuously Variable Transmission (CVT)
fluid......................8-10Engine coolant................8-5Engine oil...................8-7Windshield-washer fluid..........8-11Fog light switch................2-61Front air bag system
(See supplemental restraint system). . .1-52Front power seat adjustment........1-5Front seats....................1-2Front-door pocket..............2-66
FuelCapacities and recommended
fuel/lubricants
...............10-2Fuel economy...............5-111Fuel gauge..................2-7Fuel octane rating.............10-6Fuel recommendation..........10-4Fuel-filler cap................3-26Fuel-filler door lock opener lever. . . .3-25Fuel-filler lid.................3-26Loose fuel cap warning......2-29,2-47Fuel efficient driving tips..........5-110Fuel gauge....................2-7Fuel-filler door.................3-25Fuses.......................8-19Fusible links..................8-20
G
Garage door opener, HomeLink® Universal
Transceiver.....2-76,2-77,2-78,2-79, 2-80Gas cap.....................3-26Gauge
Engine coolant temperature gauge. . .2-6Fuel gauge..................2-7Speedometer................2-4Tachometer................ .2-5Trip odometer................2-5General maintenance.............9-2Glove box................... .2-67Glove box lock.................2-67
H
Hands-free phone system, Bluetooth®. .4-67Hazard warning flasher switch........6-2Head restraints.................1-7Headlight and turn signal switch.....2-55Headlight control switch...........2-55Headlights...................8-24Heated seat switches............2-62Heated seats................. .2-62Heated steering wheel switch.......2-63Heater
Heater and air conditioner
controls
................4-33, 4-41Heater operation..........4-34, 4-42Hill start assist system...........5-119HomeLink® Universal
Transceiver.....2-76,2-77,2-78,2-79, 2-80Hood.......................3-23Horn...................... .2-62
I
Ignition switch
Push-button ignition switch.......5-11Immobilizer system..........2-53, 5-14Important vehicle information label. . .10-13In-cabin microfilter..............8-16Increasing fuel economy..........5-111IndicatorNISSAN Intelligent Key® battery discharge
indicator
...................5-13
Index11-3

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