2023 NISSAN ALTIMA ECU

Outside the vehicle
The maintenance items listed here should
be performed from time to time, unless
otherwise specified.
Doors and engine hood:
Check that the
doors and engine hood operate properly.
Also ensure that all latches lock securely. Lu-
bricate hinges, latches, latch pins, rollers and
links if necessary. Make sure that the sec-
ondary latch keeps the hood from opening
when the primary latch is released.
When driving in areas using road salt or
other corrosive materials, check lubrica-
tion frequently.
Check that the gas strays or struts properly
and securely hold the hood, trunk, or rear
hatch in the fully open position. If the hood,
trunk, or rear hatch is not held open, have
the gas stays or struts replaced.
Lights*: Clean the headlights on a regular
basis. Make sure that the headlights, stop
lights, tail lights, turn signal lights, and other
lights are all operating properly and in-
stalled securely. Also check headlight aim.
Road wheel nuts (lug nuts)*: When check-
ing the tires, make sure no wheel nuts are
missing, and check for any loose wheel
nuts. Tighten if necessary. Tire rotation*:
Rotate tires at the specified
interval shown in the maintenance
schedule.
Tires*: Check the pressure with a gauge
of ten and always prior to long distance
trips. If necessary, adjust the pressure in all
tires, including the spare, to the pressure
specified. Check carefully for damage, cuts
or excessive wear.
Tire Pressure Monitoring System (TPMS)
tire pressure sensor: It is recommended
that you replace the TPMS tire pressure
sensor assembly when the tires are re-
placed due to wear or age.
Wheel alignment and balance: If the ve-
hicle should pull to either side while driving
on a straight and level road, or if you detect
uneven or abnormal tire wear, there may
be a need for wheel alignment. If the steer-
ing wheel or seat vibrates at normal high-
way speeds, wheel balancing may be
needed.
For additional information regarding tires,
refer to “Important Tire Safety Information”
(US) or “Tire Safety Information” (Canada) in
the Warranty Information Booklet.
Windshield: Clean the windshield on a
regular basis. Check the windshield at least
every six months for cracks or other dam- age. Have a damaged windshield repaired
by a qualified repair facility. It is recom-
mended that you have a damaged wind-
shield repaired by a NISSAN dealer, or a
NISSAN Certified Collision Center. To locate
a collision center in your area, refer to
http://collision.nissanusa.com.
Windshield wiper blades*:
Check for
cracks or wear if they do not wipe properly.
Inside the vehicle
The maintenance items listed here should
be checked on a regular basis, such as
when performing scheduled maintenance,
cleaning the vehicle, etc.
Accelerator pedal: Check the pedal for
smooth operation and make sure the
pedal does not catch or require uneven
effort. Keep the floor mat away from the
pedal.
Brake pedal: Check the pedal for smooth
operation. If the brake pedal suddenly goes
down further than normal, the pedal feels
spongy or the vehicle seems to take longer
to stop, have your vehicle checked imme-
diately. It is recommended that you visit a
NISSAN dealer for this service. Keep the
floor mat away from the pedal.
Maintenance and schedules9-3

Brakes:Check that the brakes do not pull
the vehicle to one side when applied.
Continuously Variable Transmission
(CVT) P (Park) position mechanism: On a
fairly steep hill check that the vehicle is held
securely with the shif t lever in the P (Park)
position without applying any brakes.
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
running (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 fluid level*: Make sure that the brake
fluid level is between the MAX and MIN lines
on the reservoir.
Engine coolant level*: Check the coolant
level when the engine is cold.
Engine drive belts*: Make sure the drive
belts are not frayed, worn, cracked or oily.
Engine oil level*: Check the level af ter
parking the vehicle on a level spot and
turning off the engine. Wait more than 15
minutes for the oil to drain back into the oil
pan.
9-4Maintenance and schedules

5. Determine the combined weightof luggage and cargo being
loaded on the vehicle. That weight
may not safely exceed the avail-
able cargo and luggage load ca-
pacity calculated in step 4.
6. If your vehicle will be towing a trailer, load from your trailer will be
transferred to your vehicle. Con-
sult this manual to determine
how this reduces the available
cargo and luggage load capacity
of your vehicle.
Towing a trailer with a vehicle that is
not intended for towing may result in
an accident involving injury or death.
WARNING
Do not tow a trailer with your vehicle.
Towing a trailer may result in an acci-
dent involving injury or death.
Before driving a loaded vehicle, con-
firm that you do not exceed the
Gross Vehicle Weight Rating (GVWR)
or the Gross Axle Weight Rating
(GAWR) for your vehicle. For addi-
tional information, see “Measure-
ment of weights” (P. 10-20).
Also check tires for proper inflation
pressures. For additional informa-
tion, see “Tire and Loading Informa-
tion label” (P. 8-31).
LOADING TIPS
• The GVW must not exceed GVWR or GAWR as specified on the F.M.V.S.S./
C.M.V.S.S. certification label.
• Do not load the front and rear axle to the GAWR. Doing so will exceed
the GVWR.
WARNING
• Properly secure all cargo with
ropes or straps to help prevent
it from sliding or shif ting. Do
not place cargo higher than the
seatbacks. In a sudden stop or
collision, unsecured cargo
could cause personal injury.
• Do not load your vehicle any
heavier than the GVWR or the
maximum front and rear
GAWRs. If you do, parts of your
vehicle can break, tire damage
could occur, or it can change
the way your vehicle handles.
This could result in loss of con-
trol and cause personal injury.
Technical and consumer information10-19

•Overloading not only can
shorten the life of your vehicle
and the tire, but can also cause
unsafe vehicle handling and
longer braking distances. This
may cause a premature tire
failure which could result in a
serious accident and personal
injury. Failures caused by over-
loading are not covered by the
vehicle’s warranty.MEASUREMENT OF WEIGHTS
Secure loose items to prevent
weight shif ts that could affect the
balance of your vehicle. When the ve-
hicle is loaded, drive to a scale and
weigh the front and the rear wheels
separately to determine axle loads.
Individual axle loads should not ex-
ceed either of the Gross Axle Weight
Ratings (GAWR). The total of the axle
loads should not exceed the Gross
Vehicle Weight Rating (GVWR). These
ratings are given on the vehicle cer-
tification label. If weight ratings are
exceeded, move or remove items to
bring all weights below the ratings.
Do not tow a trailer with your vehicle.
FLAT TOWING
Towing your vehicle with all four wheels on
the ground is sometimes called flat towing.
This method is sometimes used when
towing a vehicle behind a recreational ve-
hicle, such as a motor home.
CAUTION
• Failure to follow these guidelines can
result in severe transmission
damage.
• Whenever flat towing your vehicle,
always tow forward, never backward.
• Never tow your front wheel drive ve-
hicle with the front tires on the
ground. Doing so may cause serious
and expensive damage to the
powertrain.
• DO NOT tow any continuously vari-
able transmission vehicle with all
four wheels on the ground (flat tow-
ing). Doing so WILL DAMAGE internal
transmission parts due to lack of
transmission lubrication.
• For emergency towing procedures
see “Towing recommended by
NISSAN” (P. 6-20).
TOWING A TRAILER
10-20Technical and consumer information

20590. You can also obtain other in-
formation about motor vehicle 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 Canada's
Defect Investigations and Recalls Di-
vision toll free at 1-800-333-0510. You
may also report safety defects online
at: http://www.tc.gc.ca/eng/
motorvehiclesafety/menu.htm (Eng-
lish speakers) or http://
www.tc.gc.ca/fra/
securiteautomobile/menu.htm
(French speakers)
Or contact Transport Canada by
mail at:
Transport Canada Motor Vehicle
Safety Investigations Laboratory
80 Noel Street Gatineau, QC J8Z0A1
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.
Technical and consumer information10-23

11 Index
A
Active noise cancellationActive sound enhancement......5-187Active Ride Control (ARC).........5-178Air bag (See supplemental restraint
system).................... .1-47Air bag system
Front (See supplemental front impact air
bag system)
................1-54Air bag warning light.........1-67, 2-12Air bag warning light,
supplemental..............1-67, 2-12Air cleaner housing filter..........8-18Air conditionerAir conditioner operation.....4-35, 4-41Air conditioner specification label. .10-14Air conditioner system refrigerant
recommendations............10-8Air conditioner system refrigerant and oil
recommendations............10-8Heater and air conditioner
controls...............4-33, 4-41Servicing air conditioner........4-44Air flow charts................4-36Alarm system (See vehicle security
system)................... .2-52All-Wheel Drive................5-168Anchor point locations...........1-28Antenna....................4-64Anti-lock Braking System (ABS).....5-173
Antifreeze...................5-185Armrests.....................1-7Audio system.................4-45AM radio operation............4-51AM radio reception............4-45AM/FM radio............4-49, 4-51Auxiliary (AUX) devices operation. . .4-52Bluetooth® audio.............4-60FM radio operation............4-52FM radio reception............4-45iPod® Player................4-57iPod® player operation..........4-57Radio................... .4-45USB (Universal Serial Bus) Connection
Port.................... .4-54USB Connections.............4-55USB interface...............4-54Autolight switch...............2-58Automatic
Automatic power window switch. . .2-76Automatic anti-glare inside mirror. . . .3-29Automatic brake hold............5-27Automatic door locks.............3-6Automatic Emergency Braking
(AEB)...................2-13,2-16Automatic Emergency Braking (AEB) with
Pedestrian Detection............5-135AWD......................5-168
B
Battery.................5- 185, 8-14Charge warning light...........2-11Battery replacement............8-23Key fob...................8-23NISSAN Intelligent Key®.........8-24Before starting the engine.........5-16Belt (See drive belt)..............8-16Blind Spot Warning (BSW).........5-46Bluetooth® audio..............4-60Bluetooth® hands-free phone system. .4-67Bluetooth® connections.........4-81Connecting procedure..........4-72Phone indicators.............4-71Text messaging..............4-77Voice commands.............4-73Booster seats.................1-43Brake
Anti-lock Braking System (ABS). . . .5-173Brake fluid.................8-12Brake light (See stop light).......8-26Brake system...............5-173Brake warning light............2-10Brake wear indicators.......2-18,8-20Self-adjusting brakes..........8-20Brake Assist.................5-175Brake fluid...................8-12Brake system................5-173Brakes.....................8-20Break-in schedule..............5-167

Instrument panel.............0-6, 2-2Instrument panel dimmer switch.....2-62Intelligent Around View Monitor......4-16Intelligent Cruise Control (ICC)........5-71Intelligent Cruise Control (ICC)
(for vehicles with ProPILOT Assist). . . .5-106Intelligent Driver Alertness (I-DA).....5-162Intelligent Forward Collision Warning
(I-FCW).....................5-147Intelligent Key systemKey operating range............3-9Key operation................3-10Mechanical key................3-3Remote keyless entry operation. . . .3-14Troubleshooting guide..........3-16Warning signals...............3-16Intelligent Lane Intervention (I-LI).....5-40Intelligent Trace Control (I-TC).......5-178Interior light...................2-79Interior trunk lid release...........3-24iPod® Player................. .4-57ISOFIX child restraints.............1-25
J
Jump starting..............6-17,8-15
K
Key.........................3-2Key fob battery replacement........8-23
Keyless entry
With Intelligent Key system
(See Intelligent Key system)
.......3-14KeysNISSAN Intelligent Key®...........3-2NISSAN Vehicle Immobilizer System
keys..................... .3-4
L
Label
Tire and Loading Information label. .10-14LabelsAir conditioner specification label. . .10-14C.M.V.S.S. certification label.......10-13Emission control information label. .10-14Engine serial number..........10-13F.M.V.S.S. certification label........10-13Tire and Loading Information label. .10-14Vehicle identification number (VIN)
plate.................... .10-12Warning labels (for SRS)..........1-67Lane Departure Warning (LDW).......5-33LATCH (Lower Anchors and Tethers for
CHildren) System...............1-25Launch bar menu................4-7License plate
Installing the license plate........10-15LightAir bag warning light........1-67, 2-12Brake light (See stop light)........8-26Bulb check/instrument panel......2-10Bulb replacement.............8-26
Charge warning light............2-11Exterior and Interior lights........8-26Fog light switch..............2-63Fog lights..................8-26Headlight and turn signal switch. . . .2-57Headlight control switch.........2-57Headlights..................8-25Interior light.................2-79Light bulbs.................8-25Low tire pressure warning light.....2-13Low windshield-washer fluid warning
light................. .2-30, 2-47Personal lights...............2-80Security indicator light..........2-12Spotlights (See map light)........2-80Trunk light..................2-80Lights......................8-25Map lights..................2-80Lock
Child safety rear door lock.........3-7Door locks................. .3-4Fuel-filler door lock opener lever. . . .3-25Glove box lock...............2-72Power door locks..............3-6Trunk lid lock opener lever........3-22Loose fuel cap warning........2-30, 2-46Low fuel warning light. .2-11, 2-15, 2-30, 2-47Low tire pressure warning light.......2-13Low windshield-washer fluid warning
light................... .2-30, 2-47Luggage (See vehicle loading
information)..................10-16
11-4

Rear power windows.............2-76Rear seat.....................1-6Rear Sonar System (RSS)..........5-179Rear window and outside mirror defroster
switch..................... .2-56Rearview mirror................3-29RearView Monitor................4-8Recommended Fluids............10-2Recorders
Event Data.............10-24, 10-25Refrigerant recommendation.......10-8Registering a vehicle in another
country.................... .10-12Remote Engine Start..........3-19,5-17Repairing flat tire................6-11Repairing tire..................6-13Reporting safety defects (US only). . . .10-22
S
Safety
Child safety rear door lock.........3-7Child seat belts.....1-23, 1-31, 1-38, 1-43Reporting safety defects (US only). .10-22Seat
Memory seat.........3-31, 3-32, 3-33Seat adjustmentFront manual seat adjustment......1-3Front power seat adjustment.......1-4Rear seat adjustment............1-6Seat beltChild safety..................1-21Infants and small children.....1-21,1-22
Injured person................1-15Larger children...............1-22Precautions on seat belt usage.....1-12Pregnant women..............1-15Seat belt extenders............1-20Seat belt maintenance..........1-20Seat belts................1-12,7-7Shoulder belt height adjustment. . . .1-19Three-point type with retractor.....1-15Seat belt extenders..............1-20Seat belt warning light.........1-14,2-12Seatback pockets...............2-71SeatsAdjustment..................1-2Armrests....................1-7Front seats..................1-2Manual front seat adjustment......1-3Rear seat.................. .1-6Security indicator light............2-12Security system (NISSAN Vehicle Immobilizer
System), engine start.........2-54, 5-16Security systems
Vehicle security system.........2-52Self-adjusting brakes.............8-20Service manual order form........10-26Servicing air conditioner...........4-44Shif t lever lock release............5-22Shif tingContinuously Variable Transmission
(CVT)
.....................5-20Shoulder belt height adjustment......1-19Siri® Eyes-Free................ .4-64Sonar
Rear system................5-179
Spark plug replacement...........8-17Spark plugs...................8-17Specifications................ .10-9Speedometer................. .2-4Spotlights (See map light)..........2-80SRS warning label...............1-67Stability control................5-175Standard maintenance........9-10,9-28Starting
Before starting the engine........5-16Jump starting............6-17,8-15Precautions when starting and
driving................. .5-4, 5-10Push starting................6-19Starting the engine............5-16Starting the engine..............5-16Steering
Heated steering wheel..........2-65Power steering system.........5-172Steering Assist switch
(for vehicles with ProPILOT Assist).....2-66Steering wheel.................3-27Stop light....................8-26Storage.....................2-71Sun visors....................3-28Sunglasses case................2-73Sunglasses holder...............2-73Sunroof...................2-77,7-6Supplemental air bag warning
light................... .1-67, 2-12Supplemental front impact air bag
system..................... .1-54Supplemental restraint system
Information and warning labels.....1-67
11-6