2018 NISSAN SENTRA ECU

Front passenger air bag
The front passenger air bag is designed to
automatically turn OFF when the vehicle is
operated under some conditions as de-
scribed below in accordance with U.S. regu-
lations. If the front passenger air bag is OFF,
it will not inflate in a crash. The driver air bag
and other air bags in your vehicle are not
part of this system.
The purpose of the regulation is to help
reduce the risk of injury or death from an
inflating air bag to certain front passenger
seat occupants, such as children, by requir-
ing the air bag to be automatically turned
OFF. Certain sensors are used to meet the
requirements.
The occupant classification sensor in this
vehicle is a weight sensor. It is designed to
detect an occupant and objects on the
seat by weight. For example, if a child is in
the front passenger seat, the NISSAN Ad-
vanced Air Bag System is designed to turn
the front passenger air bag OFF in accor-
dance with the regulations. Also, if a child
restraint of the type specified in the regula-
tions is on the seat, its weight and the
child’s weight can be detected and cause
the air bag to turn OFF.Front passenger seat adult occupants who
are properly seated and using the seat belt
as outlined in this manual should not
cause the front passenger air bag to be
automatically turned OFF. For small adults
it may be turned OFF, however if the occu-
pant takes his/her weight off the seat
cushion (for example, by not sitting upright,
by sitting on an edge of the seat, or by
otherwise being out of position), this could
cause the sensor to turn the air bag OFF.
Always be sure to be seated and wearing
the seat belt properly for the most effective
protection by the seat belt and supple-
mental air bag.
NISSAN recommends that pre-teens and
children be properly restrained in a rear
seat. NISSAN also recommends that ap-
propriate child restraints and booster
seats be properly installed in a rear seat. If
this is not possible, the occupant classifica-
tion sensor is designed to operate as de-
scribed above to turn the front passenger
air bag OFF for specified child restraints as
required by the regulations. Failing to prop-
erly secure child restraints and to use the
ALR mode may allow the restraint to tip or
move in a collision or sudden stop. This can
also result in the passenger air bag inflat-
ing in a crash instead of being OFF. Foradditional information, refer to “Child re-
straints” in this section.
If the front passenger seat is not occupied,
the front passenger air bag is designed not
to inflate in a crash. However, heavy objects
placed on the seat could result in air bag
inflation, because of the object’s weight de-
tected by the occupant classification sen-
sor. Other conditions could also result in air
bag inflation, such as if a child is standing
on the seat, or if two children are on the
seat, contrary to the instructions in this
manual. Always be sure that you and all
vehicle occupants are seated and re-
strained properly.
Using the front passenger air bag status
light, you can monitor when the front pas-
senger air bag is automatically turned OFF.
If an adult occupant is in the seat but the
front passenger air bag status light is illu-
minated (indicating that the air bag is OFF),
it could be that the person is a small adult,
or is not sitting on the seat properly or not
using the seat belt properly.
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
Safety—Seats, seat belts and supplemental restraint system1-55

2 Instruments and controls
Instrument panel................................2-2
Meters and gauges ..............................2-3
Speedometer and odometer .................2-4
Tachometer .................................. 2-7
Engine coolant temperature gauge .......... 2-7
Fuel gauge ...................................2-8
Trip computer (if so equipped) ................2-9
Outside temperature display ................2-12
Warning lights, indicator lights and audible
reminders ...................................... 2-13
Checking lights .............................. 2-14
Warning lights ............................... 2-14
Indicator lights .............................. 2-19
Audible reminders ........................... 2-22
Vehicle information display (if so equipped) .....2-23
How to use the vehicle information
display ...................................... 2-23
Startup display .............................. 2-24
Settings ..................................... 2-24
Vehicle information display warnings
and indicators ............................... 2-32
Security systems ............................... 2-36
Vehicle security system (if so equipped) .....2-36
NISSAN Vehicle Immobilizer System .........2-38 Wiper and washer switch
.......................2-39
Switch operation ............................ 2-39
Rear window and outside mirror
(if so equipped) defroster switch ................2-40
Headlight and turn signal switch ...............2-41
Headlight control switch .....................2-41
Daytime Running Lights (DRL) system
(Type A) (if so equipped) .....................2-44
Daytime Running Lights (DRL) system
(Type B) (if so equipped) .....................2-44
LED Daytime Running Lights (DRL)
system (Type C — NISMO) (if so
equipped) ................................... 2-44
Instrument brightness control ...............2-45
Turn signal switch ........................... 2-45
Fog light switch (if so equipped) .............2-46
Horn ...........................................2-47
Heated seat switches (if so equipped) ..........2-47
V

ehicle Dynamic Control (VDC) OFF switch
(if so equipped) ................................. 2-48
E-call (SOS) switch (if so equipped) ..............2-49
Power outlet .................................... 2-49
Storage ........................................ 2-50
Front-door pockets .......................... 2-50

orAnti-lock Braking System
(ABS) warning lightorPower steering warning lightHigh beam indicator light (blue)
Automatic Emergency Braking (AEB)
system warning light (if so equipped)Seat belt warning light and chimeMalfunction Indicator Light (MIL)
orBrake warning lightShif t P (Park) warning light (if so equipped)Overdrive OFF indicator light
(if so equipped)
Charge warning lightSupplemental air bag warning lightSecurity indicator light
Door open warning light (if so equipped)Continuously Variable Transmission (CVT)
position indicator light (CVT models)
(if so equipped)Side light and headlight indicator light
(green)
Engine oil pressure warning light
(if so equipped)Cruise main switch indicator light
(if so equipped)Slip indicator light
Low fuel warning light (if so equipped)ECO mode indicator light (if so equipped)SPORT mode indicator light
(if so equipped)
Low tire pressure warning lightEngine start operation indicator light
(if so equipped)Turn signal/hazard indicator lights
Low windshield-washer fluid warning light
(if so equipped)Front fog light indicator light (if so
equipped)Vehicle Dynamic Control (VDC) OFF indi-
cator light
Master warning light (if so equipped)Front passenger air bag status light
WARNING LIGHTS, INDICATOR LIGHTS
AND AUDIBLE REMINDERS
Instruments and controls2-13

Low brake fluid warning light
When the ignition switch is placed in the ON
position, the light warns of a low brake fluid
level. If the light comes on while the engine
is running, with the parking brake not ap-
plied, stop the vehicle and perform the fol-
lowing:1. Check the brake fluid level. Add brake fluid as necessary. For additional infor-
mation, refer to “Brake fluid” in the “Do-
it-yourself ” section of this manual.
2. If the brake fluid level is correct, have the warning system checked. It is rec-
ommended that you visit a NISSAN
dealer for this service.
WARNING
∙ Your brake system may not be work-ing properly if the warning light is on.
Driving could be dangerous. If you
judge it to be safe, drive carefully to
the nearest service station for repairs.
Otherwise, have your vehicle towed
because driving it could be
dangerous. ∙ Pressing the brake pedal with the en-
gine stopped and/or a low brake fluid
level may increase your stopping dis-
tance and braking will require greater
pedal effort as well as pedal travel.
∙ If the brake fluid level is below the MINIMUM or MIN mark on the brake
fluid reservoir, do not drive until the
brake system has been checked. It is
recommended that you visit a NISSAN
dealer for this service.
Anti-lock Braking System (ABS) warning
indicator
When the parking brake is released and the
brake fluid level is sufficient, if both the
brake warning light and the ABS warning
light illuminate, it may indicate the ABS is
not functioning properly. Have the brake
system checked and, if necessary, repaired.
It is recommended that you visit a NISSAN
dealer for this service. Avoid high-speed
driving and abrupt braking. For additional
information, refer to “Anti-lock Braking Sys-
tem (ABS) warning light” in this section.
Charge warning light
If this light comes on while the engine is
running, it may indicate the charging sys- tem is not functioning properly. Turn the
engine off and check the generator belt. If
the belt is loose, broken, missing, or if the
light remains on, have your vehicle serviced
immediately. It is recommended that you
visit a NISSAN dealer for this service.
CAUTION
Do not continue driving if the generator
belt is loose, broken or missing.
Door open warning light (if
so equipped)
This light comes on when any of the doors
are not closed securely while the ignition
switch is in the ON position.
Engine oil pressurewarning light (if so
equipped)
This light warns of low engine oil pressure. If
the light flickers or comes on during nor-
mal driving, pull off the road in a safe area,
stop the engine immediatelyand call a
NISSAN dealer or other authorized repair
shop.
The engine oil pressure warning light is
not designed to indicate a low oil level.
Use the dipstick to check the oil level. For
Instruments and controls2-15

until the driver’s seat belt is fastened. At the
same time, the chime sounds for about
6 seconds unless the driver’s seat belt is
securely fastened.
The seat belt warning light may also illumi-
nate if the front passenger’s seat belt is not
fastened when the front passenger’s seat
is occupied. For 7 seconds af ter the ignition
switch is placed in the ON position, the sys-
tem does not activate the warning light for
the front passenger.
For additional information, refer to “Seat
belts” in the “Safety—Seats, seat belts and
supplemental restraint system” section of
this manual.
Shif t P (Park) warning light(if so equipped)
This light blinks red and the key reminder
chime sounds if the shif t lever is in any
position other than P (Park) and the ignition
switch is in the OFF position. Return the
shif t lever to P (Park) with the ignition
switch in the OFF position and the light will
turn off. Place the ignition switch in the
LOCK position and the chime will turn off.
For additional information, refer to “NISSAN
Intelligent Key®” in the “Pre-driving checks
and adjustments” section of this manual.
Supplemental air bagwarning light
When the ignition switch is placed in the ON
or START position, the supplemental air
bag warning light illuminates for about
7 seconds and then turns off. This means
the system is operational.
If any of the following conditions occur, the
front air bag, side air bag, curtain air bag,
and pretensioner seat belt systems need
servicing.
∙ The supplemental air bag warning light remains on af ter approximately 7 sec-
onds.
∙ The supplemental air bag warning light flashes intermittently.
∙ The supplemental air bag warning light does not come on at all.
It is recommended that you visit a NISSAN
dealer for these services. Unless checked
and repaired, the supplemental restraint
system (air bag system) and/or the preten-
sioners may not function properly. For ad-
ditional information, refer to “Supplemental
restraint system (SRS)” in the “Safety—
Seats, seat belts and supplemental re-
straint system” section of this manual.
WARNING
If the supplemental air bag warning
light is on, it could mean that the front
air bag, side air bag, curtain air bag sys-
tems and/or pretensioner systems will
not operate in an accident. To help
avoid injury to yourself or others, have
your vehicle checked as soon as pos-
sible. It is recommended that you visit a
NISSAN dealer for this service.
INDICATOR LIGHTS
For additional information, refer to “Vehicle
information display” in this section.
Continuously Variable Transmission (CVT)
position indicator light
(CVT models) (if so
equipped)
When the ignition switch is placed in the ON
position, this indicator light shows the shif t
lever position. For additional information,
refer to “Driving the vehicle” in the “Starting
and driving” section of this manual.
Instruments and controls2-19

test. For additional information, refer to
“Readiness for Inspection/Maintenance
(I/M) test” in the “Technical and consumer
information” section of this manual.
Operation
The MIL will come on in one of two ways:∙ MIL on steady — An emission control system malfunction has been de-
tected. Check the fuel-filler cap if the
Loose Fuel Cap warning appears in the
vehicle information display. If the fuel-
filler cap is loose or missing, tighten or
install the cap and continue to drive the
vehicle. The
light should turn off
af ter a few driving trips. If the
light
does not turn off af ter a few driving
trips, have the vehicle inspected. It is
recommended that you visit a NISSAN
dealer for this service. You do not need
to have your vehicle towed to the
dealer.
∙ MIL blinking — An engine misfire has been detected which may damage the
emission control system. To reduce or
avoid emission control system dam-
age:
– do not drive at speeds above 45 mph (72 km/h). – avoid hard acceleration or decelera-
tion.
– avoid steep uphill grades.
– if possible, reduce the amount of cargo being hauled or towed.
The MIL may stop blinking and come on
steady. Have the vehicle inspected. It is rec-
ommended that you visit a NISSAN dealer
for this service. You do not need to have
your vehicle towed to the dealer.
CAUTION
Continued vehicle operation without
having the emission control system
checked and repaired as necessary
could lead to poor driveability, reduced
fuel economy, and possible damage to
the emission control system.
Overdrive OFF indicator light (if so equipped)
The overdrive OFF indicator light illumi-
nates when the overdrive OFF mode is se-
lected.
For additional information, refer to “Driving
the vehicle” in the “Starting and driving” sec-
tion of this manual.
Security indicator light
For vehicles without Intelligent Key: This
light blinks whenever the ignition switch is
placed in the LOCK, OFF or ACC position.
For vehicles with Intelligent Key: This light
blinks when the ignition switch is placed in
the LOCK position with the key removed
from the ignition switch.
The blinking security indicator light indi-
cates that the security systems equipped
on the vehicle are operational.
For additional information, refer to “Security
systems” in this section.
Side light and headlightindicator light (green)
The side light and headlight indicator light
illuminates when the side light or headlight
position is selected. For additional informa-
tion, refer to “Headlight and turn signal
switch” in this section.
Slip indicator light
This indicator will blink when the Vehicle
Dynamic Control (VDC) system is operat-
Instruments and controls2-21

∙ Any doors are not closed securely whenlocking the doors.
When the buzzer sounds, be sure to check
both the vehicle and the Intelligent Key. For
additional information, refer to “NISSAN In-
telligent Key®” in the “Pre-driving checks
and adjustments” section of this manual.
Parking brake reminder chime
A chime sounds if the parking brake is set
and the vehicle is driven. The chime will
stop if the parking brake is released or the
vehicle speed returns to zero.
The vehicle information display is located
to the lef t of the speedometer. It displays
such items as:∙ Vehicle settings
∙ Trip computer information
∙ Drive system warnings and settings
∙ Cruise control system information
∙ NISSAN Intelligent Key® operation infor- mation
∙ Indicators and warnings
HOW TO USE THE VEHICLE
INFORMATION DISPLAY
The vehicle information display can be
changed using the
,, ENTER
and
switches located on the steering
wheel.
1— navigate through the items in
the vehicle information display
ENTER — change or select an item in
the vehicle information display
2— go back to the previous menu
LIC2630LIC3465
VEHICLE INFORMATION DISPLAY (if
so equipped)
Instruments and controls2-23

Unavailable: Front Radar Obstruction (if
so equipped)
This warning appears when the Intelligent
Cruise Control (ICC) system or the Auto-
matic Emergency Braking (AEB) system
becomes unavailable because the front ra-
dar is obstructed. For additional informa-
tion, refer to “Intelligent Cruise Control (ICC)”
or “Automatic Emergency Braking (AEB)” in
the “Starting and driving” section of this
manual.
ECO mode indicator (if so equipped)
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.Your vehicle may have two types of security
systems:
∙ Vehicle security system (if so equipped)
∙ NISSAN Vehicle Immobilizer System
VEHICLE SECURITY SYSTEM (if so
equipped)
The vehicle security system provides visual
and audible alarm signals if someone
opens the doors when the system is
armed. It is not, however, a motion detec-
tion type system that activates when a ve-
hicle is moved or when a vibration occurs. The system helps detect vehicle thef t but
cannot prevent it, nor can it prevent the
thef t of interior or exterior vehicle compo-
nents in all situations. Always secure your
vehicle even if parking for a brief period.
Never leave your keys in the ignition, and
always lock the vehicle when unattended.
Be aware of your surroundings, and park in
secure, well-lit areas whenever possible.
Many devices offering additional protec-
tion, such as component locks, identifica-
tion markers, and tracking systems, are
available at auto supply stores and spe-
cialty shops. A NISSAN dealer may also offer
such equipment. Check with your insur-
ance company to see if you may be eligible
for discounts for various thef t protection
features.
How to arm the vehicle security
system
1. Close all windows.
(The system can be
armed even if the windows are open.)
2. Place the ignition switch in the LOCK position and remove the key.
3. Close all doors. Lock all doors. The doors can be locked with:
LIC0301
SECURITY SYSTEMS
2-36Instruments and controls