ECU NISSAN SENTRA 2017 B17 / 7.G Workshop Manual

WARNING
●Make sure the parking brake is securely
applied and the manual transmission is
shifted into R (Reverse) , or the CVT is
shifted into P (Park) .
● Never change tires when the vehicle is
on a slope, ice or slippery areas. This is
hazardous.
● Never change tires if oncoming traffic is
close to your vehicle. Wait for profes-
sional road assistance.
A. Blocks
B. Flat tire
Blocking wheels
Place suitable blocks at both the front and back
of the wheel diagonally opposite the flat tire to
prevent the vehicle from moving when it is jacked
up.
WARNING
Be sure to block the wheel as the vehicle
may move and result in personal injury.
Getting the spare tire and tools
1. Open the trunk. Lift the trunk floor carpeting and spare tire cover
A. Remove the jack
and the spare tire as indicated.
2. To remove the jack, take off the strap and lift out. If necessary, remove the spare tire first
to easily access the jack strap.
LCE2142LCE2250
6-4In case of emergency

●Use the correct jack-up points. Never
use any other part of the vehicle for jack
support.
● Never jack up the vehicle more than
necessary.
● Never use blocks on or under the jack.
● Do not start or run the engine while
vehicle is on the jack. It may cause the
vehicle to move. This is especially true
for vehicles with limited slip
differentials.
● Do not allow passengers to stay in the
vehicle while it is on the jack.
● Never run the engine with a wheel(s) off
the ground. It may cause the vehicle to
move. Always refer to the proper illustrations for the
correct placement and jack-up points for your
specific vehicle model and jack type.
Carefully read the caution label attached to
the jack body and the following instruc-
tions.
1. Loosen each wheel nut one or two turns by turning counterclockwise with the wheel nut
wrench. Do not remove the wheel nuts
until the tire is off the ground.
2. Place the jack directly under the jack-up point as illustrated so the top of the jack
contacts the vehicle at the jack-up point.
Align the jack head between the two notches in the front or the rear as shown.
Also fit the groove of the jack head between
the notches as shown.
The jack should be used on firm and
level ground.
3. To lift the vehicle, securely hold the jack lever and rod with both hands. Carefully raise the
vehicle until the tire clears the ground. Re-
move the wheel nuts and then remove the
tire.
SCE0002
6-6In case of emergency

Installing the spare tire
The spare tire is designed for emergency
use. For additional information, refer to
“Wheels and tires” in the “Do-it-yourself”
section of this manual.1. Clean any mud or dirt from the surface be- tween the wheel and hub.
2. Carefully put the spare tire on and tighten the wheel nuts finger tight.
3. With the wheel nut wrench, tighten wheel nuts alternately and evenly in the sequence
illustrated (
A,B,C,D,E) until they are
tight. 4. Lower the vehicle slowly until the tire
touches the ground. Then, with the wheel
nut wrench, tighten the wheel nuts securely
in the sequence illustrated (
A,B,C,D,
E) . Lower the vehicle completely.
WARNING
●Incorrect wheel nuts or improperly
tightened wheel nuts can cause the
wheel to become loose or come off.
This could cause an accident.
● Do not use oil or grease on the wheel
studs or nuts. This could cause the nuts
to become loose.
● Retighten the wheel nuts when the ve-
hicle has been driven for 600 miles
(1,000 km) (also in cases of a flat tire,
etc.) .
As soon as possible, tighten the wheel nuts
to the specified torque with a torque
wrench.
Wheel nut tightening torque: 83 ft-lb (113 N·m)
The wheel nuts must be kept tightened to
specification at all times. It is recom-
mended that wheel nuts be tightened to
specification at each lubrication interval. Adjust tire pressure to the COLD pressure.
COLD pressure: After vehicle has been
parked for 3 hours or more or driven less
than 1 mile (1.6 km) .
COLD tire pressures are shown on the Tire
and Loading Information Label.
After adjusting tire pressure to the COLD
tire pressure, the display of the tire pres-
sure information may show higher pres-
sure than the COLD tire pressure after the
vehicle has been driven more than 1 mile
(1.6 km) .
This is because the tire pressurizes as the
tire temperature rises. This does not indi-
cate a system malfunction.
5. Securely store the flat tire in the vehicle.
WCE0056
In case of emergency6-7

CAUTION
●Never tow Continuously Variable Trans-
mission (CVT) models with the front
wheels on the ground or 4 wheels on
the ground (forward or backward) , as
this may cause serious and expensive
damage to the transmission. If it is nec-
essary to tow the vehicle with the rear
wheels raised always use towing dollies
under the front wheels.
● When towing Continuously Variable
Transmission (CVT) models with the
front wheels on towing dollies, or when
towing Manual Transmission (M/T)
models with the front wheels on the
ground:
– Place the ignition switch to the OFF position, and secure the steering
wheel in a straight-ahead position
with a rope or similar device. Never
secure the steering wheel by placing
the ignition switch in the LOCK posi-
tion. This may damage the steering
lock mechanism (for models with
steering lock mechanism) .
– Move the shift lever to the N (Neutral) position. ●
When towing Continuously Variable
Transmission (CVT) or Manual Trans-
mission (M/T) models with the rear
wheels on the ground (if you do not use
towing dollies): Always release the
parking brake.
● Observe the following restricted towing
speeds and distances for Manual Trans-
missions (M/T) only:
– Speed: Below 80 km/h (50 mph)
– Distance: Less than 80 km (50 miles)
VEHICLE RECOVERY (freeing a stuck
vehicle)
WARNING
To avoid vehicle damage, serious personal
injury or death when recovering a stuck
vehicle:
● Contact a professional towing service
to recover the vehicle if you have any
questions regarding the recovery
procedure.
● Tow chains or cables must be attached
only to main structural members of the
vehicle.
ACVT
BM/T
LCE2122
In case of emergency6-13

FLOOR MATS (if so equipped)
WARNING
To avoid potential pedal interference that
may result in a collision, injury or death:
●NEVER place a floor mat on top of an-
other floor mat in the driver front posi-
tion or install them upside down or
backwards.
● Use only Genuine NISSAN floor mats, or
equivalent floor mats, that are specifi-
cally designed for use in your vehicle
model and model year. ●
Properly position the mats in the floor-
well using the floor mat positioning
hook. For additional information, refer
to Floor mat installation in this
section.
● Make sure the floor mat does not inter-
fere with pedal operation.
● Periodically check the floor mats to
make sure they are properly installed.
● After cleaning the vehicle interior,
check the floor mats to make sure they
are properly installed.
The use of Genuine NISSAN floor mats can
extend the life of your vehicle carpet and make it
easier to clean the interior. Mats should be main-
tained with regular cleaning and replaced if they
become excessively worn.
Floor mat installation
Your vehicle is equipped with floor mat position-
ing hook(s) . The number and shape of the floor
mat positioning hooks for each seating position
varies depending on the vehicle.
When installing Genuine NISSAN floor mats,
follow the installation instructions provided with
the mat and the following: 1. Position the floor mat in the floorwell so that
the floor mat grommet holes are aligned with
the hook(s) .
2. Secure the grommet holes into the hook(s) and ensure that the floor mat is properly
positioned.
3. Make sure the floor mat does not interfere with pedal operation. With the ignition in the
OFF position, the selector lever in the P
(Park) position (Automatic Transmission
models) or the shift lever in the N (Neutral)
position (Manual Transmission models) fully
apply and release all pedals. The floor mat
must not interfere with pedal operation or
prevent the pedal from returning to its nor-
mal position.
It is recommended that you visit a NISSAN dealer
for details about installing the floor mats in your
vehicle.
LAI2009
Appearance and care7-5

When performing any inspection or maintenance
work on your vehicle, always take care to prevent
serious accidental injury to yourself or damage to
the vehicle. The following are general precau-
tions which should be closely observed.
WARNING
●Park the vehicle on a level surface, ap-
ply the parking brake securely and
block the wheels to prevent the vehicle
from moving. Move the shift lever to P
(Park) .
● Be sure the ignition key is in the OFF or
LOCK position when performing 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 whenever
you work on your vehicle. ●
Your vehicle is equipped with an auto-
matic engine cooling fan. It may come on
at any time without warning, even if the
ignition key 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.
● 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 neces-
sary to work under the vehicle, support
it with safety stands.
● Keep smoking materials, flame and
sparks away from the fuel tank and
battery.
● On gasoline engine models, the fuel
filter or fuel lines should be serviced. It
is recommended that you visit a
NISSAN dealer for this service because
the fuel lines are under high pressure
even when the engine is off.
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. Al-
ways conform to local regulations for
disposal of vehicle fluid.
● Never leave the engine or the transmis-
sion related component harness con-
nector disconnected while the ignition
switch is in the ON position.
● Never connect or disconnect the battery
or any transistorized component while
the ignition switch is in the ON position.
This “Do-it-yourself” section gives instructions
regarding only those items which are relatively
easy for an owner to perform.
A Genuine NISSAN service manual is also avail-
able. For additional information, refer to “Owner’s
Manual/Service Manual order information” in the
“Technical and consumer information” section of
this manual.
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

4. Place a large drain pan under the drain plug
B.
5. Remove the drain plug
Bwith a wrench by
turning it counterclockwise and completely
drain the oil.
If the oil filter is to be changed, remove and
replace it at this time. For additional informa-
tion, refer to “Changing engine oil filter” in
this section.
WARNING
● Prolonged and repeated contact with
used engine oil may cause skin cancer.
● Try to avoid direct skin contact with
used oil. If skin contact is made, wash
thoroughly with soap or hand cleaner as
soon as possible.
● Keep used engine oil out of reach of
children.
CAUTION
● Be careful not to burn yourself. The en-
gine oil may be hot.
● Waste oil must be disposed of properly.
● Check your local regulations. 6. Clean and reinstall the drain plug and a new
washer. Securely tighten the drain plug with
a wrench. Do not use excessive force.
Drain plug tightening torque: 34 N·m (25 ft-lb)
7. Refill engine with recommended oil through the oil filler opening, then install the oil filler
cap securely.
For additional information on the drain and
refill capacity, refer to “Recommended
fluids/lubricants and capacities” in the
“Technical and consumer information” sec-
tion of this manual.
The drain and refill capacity depends on the
oil temperature and drain time. Use these
specifications for reference only. Always use
the dipstick to determine when the proper
amount of oil is in the engine.
8. Start the engine. Check for leakage around the drain plug and oil filter. Correct as re-
quired.
9. Turn the engine off and wait more than 10 minutes. Check the oil level with the
dipstick. Add engine oil if necessary.
For additional information on the location of the
engine oil filler cap, refer to “Engine compartment
check locations” in this section.CHANGING ENGINE OIL FILTER
1. Park the vehicle on a level surface and apply the parking brake.
2. Turn the engine off.
MRA8DE
LDI3045
Do-it-yourself8-9

3. Place a large drain pan under the oil filterB.
4. Loosen the oil filter
Bwith an oil filter
wrench by turning it counterclockwise. Then
remove the oil filter by turning it by hand.
CAUTION
Be careful not to burn yourself. The engine
oil may be hot.
5. Wipe the engine oil filter sealing surface with a clean rag.
CAUTION
Be sure to remove any old gasket material
remaining on the sealing surface of the
engine. Failure to do so could lead to
engine damage.
6. Coat the gasket on the new filter with clean engine oil.
7. Screw on the oil filter. Securely tighten oil filter with wrench. Do not use excessive
force.
Oil filter tightening torque: 18 N·m (13 ft-lb)
8. Refill engine with recommended oil through the oil filler opening
A, then install oil filler
cap securely.
9. Start the engine and check for leakage around the oil filter. Correct as required.
10. Turn the engine off and wait more than 10 minutes. Check the oil level. Add engine
oil if necessary. For additional information on the location of the
engine oil filler cap, refer to “Engine compartment
check locations” in this section.MR16DDT
LDI3044
8-10Do-it-yourself

●Keep the battery surface clean and dry.
Clean the battery with a solution of baking
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 (-) battery
terminal cable to prevent discharge.
NOTE:
Care should be taken to avoid situations
that can lead to potential battery discharge
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. Hydrogen
gas generated by the battery is explo-
sive. Explosive gases can cause blind-
ness or injury. Do not allow battery fluid
to contact your skin, eyes, fabrics or
painted surfaces. Sulfuric acid can
cause blindness or injury. After touch-
ing a battery or battery cap, do not
touch or rub your eyes. Thoroughly
wash your hands. If the acid contacts
your eyes, skin or clothing, immediately
flush with water for at least 15 minutes
and seek medical attention.
● Do not operate the vehicle if the fluid in
the battery is low. Low battery fluid can
cause a higher load on the battery
which can generate heat, reduce battery
life, and in some cases lead to an
explosion.
● When working on or near a battery, al-
ways wear suitable eye protection and
remove all jewelry.
● Battery posts, terminals and related ac-
cessories contain lead and lead com-
pounds. Wash hands after handling. ●
Keep battery out of the reach of
children.
● Do not tip the battery. Keep the vent
caps tight and the battery level.
BATTERY
Do-it-yourself8-13

1. Visually inspect the belt for signs of unusualwear, cuts, or fraying. If the belt is in poor
condition, have it replaced or adjusted. It is
recommended that you visit a NISSAN
dealer for this service.
2. Have the belt checked regularly for condi- tion.
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.
Platinum-tipped spark plugs (except
California models)
It is not necessary to replace platinum-tippedA
spark plugs as frequently as conventional type
spark plugs because they last much longer. Fol-
low the maintenance log shown in the “NISSAN
Service and Maintenance Guide”. Do not service
platinum-tipped spark plugs by cleaning or re-
gapping.
● Always replace spark plugs with rec-
ommended or equivalent ones.
If replacement is required, it is recommended that
you visit a NISSAN dealer for this service.
Iridium-tipped spark plugs (MR16DDT
engine or California models only)
It is not necessary to replace iridium-tippedA
spark plugs as frequently as conventional type
spark plugs because they last much longer. Fol-
low the maintenance log shown in the “NISSAN
Service and Maintenance Guide”. Do not service
iridium-tipped spark plugs by cleaning or regap-
ping. ● Always replace spark plugs with rec-
ommended or equivalent ones.
If replacement is required, it is recommended that
you visit a NISSAN dealer for this service.
SDI1895
SPARK PLUGS
8-16Do-it-yourself