ignition NISSAN SENTRA 2023 Owners Manual

When performing any inspection or main-
tenance work on your vehicle, always take
care to prevent serious accidental injury to
yourself or damage to the vehicle. The fol-
lowing are general precautions which
should be closely observed.
WARNING
• Park the vehicle on a level surface,
apply the parking brake securely and
block the wheels to prevent the ve-
hicle from moving. For manual trans-
mission models, move the shif t lever
to N (Neutral). For CVT models, move
the shif t lever to P (Park).
• Be sure the ignition switch is in the
OFF or LOCK position when perform-
ing any parts replacement or repairs.
• If you must work with the engine run-
ning, keep your hands, clothing, hair
and tools away from moving fans,
belts and any other moving parts.
• It is advisable to secure or remove
any loose clothing and remove any
jewelry, such as rings, watches, etc.
before working on your vehicle.
• Always wear eye protection when-
ever you work on your vehicle. •
If you must run the engine in an en-
closed space such as a garage, be
sure there is proper ventilation for
exhaust gases to escape.
• Never get under the vehicle while it is
supported only by a jack. If it is nec-
essary to work under the vehicle,
support it with safety stands.
• Keep smoking materials, flame and
sparks away from the fuel tank and
battery.
• Because the fuel lines on gasoline
engine models are under high pres-
sure even when the engine is off, it is
recommended that you visit a
NISSAN dealer for service of the fuel
filter or fuel lines.
• Your vehicle is equipped with an au-
tomatic engine cooling fan. It may
come on at any time without
warning, even if the ignition switch is
in the OFF position and the engine is
not running. To avoid injury, always
disconnect the negative battery
cable before working near the fan.
CAUTION
• Do not work under the hood while
the engine is hot. Turn the engine off
and wait until it cools down. •
Avoid contact with used engine oil
and coolant. Improperly disposed
engine oil, engine coolant and/or
other vehicle fluids can damage the
environment. Always conform to lo-
cal regulations for disposal of vehicle
fluid.
• Never leave the engine or the trans-
mission related component harness
connector disconnected while the ig-
nition switch is in the ON position.
• Never connect or disconnect the bat-
tery or any transistorized compo-
nent while the ignition switch is in
the ON position.
This “Do-it-yourself ” section gives instruc-
tions regarding only those items which are
relatively easy for an owner to perform.
A Genuine NISSAN service manual is also
available. For additional information, see
“Owner's Manual/Service Manual order in-
formation” (P. 10-25).
You should be aware that incomplete or
improper servicing may result in operating
difficulties or excessive emissions, and
could affect warranty coverage. If in doubt
about any servicing, it is recommended
that you have it done by a NISSAN dealer.
MAINTENANCE PRECAUTIONS
8-2Do-it-yourself

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
5. Crankshaf t pulley
WARNING
Be sure the ignition switch is in the OFF
or LOCK position before servicing drive
belt. The engine could rotate
unexpectedly.
LDI3478WDI0638
VARIABLE VOLTAGE CONTROL
SYSTEM DRIVE BELT
Do-it-yourself8-15

1. Visually inspect the belt for signs of un-usual wear, cuts, or fraying. If the belt is in
poor condition, have it replaced or ad-
justed. It is recommended that you visit a
NISSAN dealer for this service.
2. Have the belt checked regularly for condition.
REPLACING SPARK PLUGS
WARNING
Be sure the engine and ignition switch
are off and that the parking brake is
engaged securely.
CAUTION
Be sure to use the correct socket to re-
move the spark plugs. An incorrect
socket can damage the spark plugs.
Iridium-tipped spark plugs
It is not necessary to replace iridium-
tipped
OAspark plugs as frequently as con-
ventional type spark plugs because they
last much longer. Follow the maintenance
log shown in the “Maintenance and sched-
ules” section of this manual. Do not service
platinum-tipped spark plugs by cleaning or
regapping.
• Always replace spark plugs with rec-
ommended or equivalent ones.
If replacement is required, it is recom-
mended that you visit a NISSAN dealer for
this service.
SDI1895
SPARK PLUGS
8-16Do-it-yourself

Four types of fuses are used. TypeOAis
used exclusively in the passenger com-
partment fuse box.
Type
OBandODare used in the engine
compartment fuse box.
Type
OCis used in passenger compart-
ment and the engine compartment.
NOTE:
Your vehicle may not be equipped with
all fuses listed on the fuse label.
ENGINE COMPARTMENT
WARNING
Never use a fuse of higher or lower am-
perage rating than that specified on
the fuse box cover. This could damage
the electrical system or electronic con-
trol units or cause a fire.
If any electrical equipment does not come
on, check for an open fuse.
1. Be sure the ignition switch and the head- light switch are OFF.
2. Open the engine hood.
LDI3480
LDI3511
FUSES
8-20Do-it-yourself

PASSENGER COMPARTMENT
WARNING
Never use a fuse of higher or lower am-
perage rating than that specified on
the fuse box cover. This could damage
the electrical system or electronic con-
trol units or cause a fire.
If any electrical equipment does not oper-
ate, check for an open fuse.
NOTE:
The fuse box is located on the driver's
side of the instrument panel. 1. Be sure the ignition switch and the head-
light switch are OFF.
2. Remove the fuse box cover
OAwith a
suitable tool. Use a cloth to avoid dam-
aging the trim.
3. Locate the fuse that needs to be replaced.
4. Remove the fuse with the fuse puller
OB,
which is located in the center of the fuse
box cover in the passenger
compartment. 5. If the fuse is open
OC, replace it with an
equivalent good fuse
OD.
6. Push the fuse box cover to install.
If a new fuse also opens, have the electrical
system checked and repaired. It is recom-
mended that you visit a NISSAN dealer for
this service.
NOTE:
Your vehicle may not be equipped with
all fuses listed on the fuse label.
LDI3483LDI3481
8-22Do-it-yourself

Af termarket fuel additives
NISSAN does not recommend the use of
any af termarket fuel additives (for ex-
ample, fuel injector cleaner, octane
booster, intake valve deposit removers,
etc.) which are sold commercially. Many of
these additives intended for gum, varnish
or deposit removal may contain active sol-
vents or similar ingredients that can be
harmful to the fuel system and engine.
Octane rating tips
Using unleaded gasoline with an octane
rating lower than recommended can
cause persistent, heavy “spark knock.”
(“Spark knock” is a metallic rapping
noise.) If severe, this can lead to engine
damage. If you detect a persistent heavy
spark knock even when using gasoline
of the stated octane rating, or if you hear
steady spark knock while holding a
steady speed on level roads, it is recom-
mended that you have a NISSAN dealer
correct the condition. Failure to correct
the condition is misuse of the vehicle, for
which NISSAN is not responsible.Incorrect ignition timing may result in
spark knock, af ter-run and/or overheating,
which may cause excessive fuel consump-
tion or engine damage. If any of the above
symptoms are encountered, have your ve-
hicle checked. It is recommended that you
visit a NISSAN dealer for servicing.
However, now and then you may notice
light spark knock for a short time while
accelerating or driving up hills. This is not
a cause for concern, because you get the
greatest fuel benefit when there is light
spark knock for a short time under heavy
engine load.
10-6Technical and consumer information

ENGINE
Model2.0L 4 cylinder (MR20DD engine model)
Type Gasoline, 4-cycle, DOHC
Cylinder arrangement 4-cylinder, inline
Bore x Stroke in (mm) 3.307 x 3.547 (84.0 x 90.1)
Displacement cu in (cm
3) 121.86 (1,997)
Firing order 1–3–4–2
Idle speed
No adjustment is necessary.
M/T
CVT (in “N” position)
Ignition timing (degree B.T.D.C. at idle speed)
CO%atidle
Spark plug DXE22H11C
Spark plug gap (Nominal) in (mm) 0.043 (1.1)
Camshaf t operation Timing chain
This spark ignition system complies with the Canadian standard ICES-002.
SPECIFICATIONS
Technical and consumer information10-9

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
vehicle.
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.This vehicle is equipped with an Event Data
Recorder (EDR). The main purpose of an
EDR is to record, in certain crash or near
crash-like situations, such as an air bag
deployment or hitting a road obstacle, data
that will assist in understanding how a ve-
hicle's systems performed. The EDR is de-
signed to record data related to vehicle dy-
namics and safety systems for a short
period of time, typically 30 seconds or less.
The EDR in this vehicle is designed to re-
cord such data as:
• How various systems in your vehicle were
operating;
• Whether or not the driver and passenger safety belts were buckled/fastened;
• How far (if at all) the driver was depress- ing the accelerator and/or brake pedal;
and,
• How fast the vehicle was traveling.
• Sounds are not recorded. These data can help provide a better un-
derstanding of the circumstances in which
crashes and injuries occur. NOTE: EDR data
are recorded by your vehicle only if a non-
trivial crash situation occurs; no data are
recorded by the EDR under normal driving
conditions and no personal data (e.g.,
name, gender, age, and crash location) are
recorded. However, other parties, such as
law enforcement, could combine the EDR
data with the type of personally identif ying
data routinely acquired during a crash
investigation.
To read data recorded by an EDR, special
equipment is required, and access to the
vehicle or the EDR is needed. In addition to
the vehicle manufacturer and NISSAN
dealer, other parties, such as law enforce-
ment, that have the special equipment, can
read the information if they have access to
the vehicle or the EDR.
EDR data will only be accessed with the
consent of the vehicle owner or lessee or
as otherwise required or permitted by law.
READINESS FOR INSPECTION/
MAINTENANCE (I/M) TEST
EVENT DATA RECORDERS (EDR)
10-24Technical and consumer information

Engine Block Heater.............5-142Engine coolant temperature gauge. . . .2-6Event Data recorders............10-24Exhaust gas (Carbon monoxide)......5-4Explanation of maintenance items.....9-2Explanation of scheduled maintenance
items.......................9-5Extended storage switch..........2-65Eyeglass case.................2-68
F
F.M.V.S.S. certification label.........10-13Flashers (See hazard warning flasher
switch)......................6-2Flat tire..................... .6-3Floor 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................8-4Engine oil.................. .8-6Windshield-washer fluid..........8-11Fog light switch................2-59Front air bag system
(See supplemental restraint system). . .1-52Front power seat adjustment........1-5Front seats....................1-2Front-door pocket..............2-66
Fuel
Capacities and recommended
fuel/lubricants
...............10-2Fuel economy...............5-126Fuel gauge..................2-7Fuel octane rating.............10-6Fuel recommendation..........10-4Fuel-filler cap................3-24Fuel-filler door lock opener lever. . . .3-23Fuel-filler lid.................3-24Loose fuel cap warning......2-28, 2-42Fuel efficient driving tips..........5-125Fuel gauge....................2-7Fuel-filler door.................3-23Fuses......................8-20Fusible links...................8-21
G
Gas cap.....................3-24Gauge
Engine coolant temperature gauge. . .2-6Fuel gauge..................2-7Speedometer..............2-4, 2-5Tachometer................ .2-6Trip odometer................2-5General maintenance.............9-2Glove box................... .2-67
H
Hands-free phone system, Bluetooth®. .4-66Hazard warning flasher switch........6-2
Head restraints.................1-8Headlight and turn signal switch.....2-52Headlight control switch...........2-52Headlights...................8-25Heated seat switches............2-60Heated steering wheel switch.......2-61Heater
Heater and air conditioner
controls
................4-32, 4-40Heater operation..........4-33, 4-41Hill start assist system...........5-135Hood.......................3-21Horn...................... .2-59
I
Ignition switch
Push-button ignition switch.......5-11Immobilizer system..........2-49, 5-14Important vehicle information label. . .10-13In-cabin microfilter..............8-17Increasing fuel economy..........5-126IndicatorNISSAN Intelligent Key® battery
discharge indicator
............5-13Inside automatic anti-glare mirror. . . .3-28Instrument brightness control.......2-58Instrument panel.............0-6, 2-2Instrument panel dimmer switch.....2-58Intelligent Around View® Monitor......4-16Intelligent Cruise Control (ICC).......5-61Intelligent Driver Alertness (I-DA).....5-121Intelligent Engine Brake...........5-134
11-3