ECU NISSAN FRONTIER 2021 Repair Manual

TOWING SAFETY
Trailer hitch
Your vehicle may be equipped with an op-
tional trailer tow package. The trailer tow
package includes a receiver-type frame
mounted hitch. This hitch is rated for the
maximum towing capacity of this vehicle
when the proper towing equipment is
used. Choose a proper ball mount and
hitch ball that is rated for the trailer to be
towed. Genuine NISSAN ball mounts and
hitch balls are available from a NISSAN
dealer.
If your vehicle is not equipped with the op-
tional trailer tow package, check the tow-
ing capacity of your bumper hitch or
receiver-type frame mounted hitch.
Choose a proper hitch for your vehicle and
trailer. A Genuine NISSAN trailer hitch is
available from a NISSAN dealer. Make sure
the trailer hitch is securely attached to the
vehicle to help avoid personal injury or
property damage due to sway caused by
crosswinds, rough road surfaces or pass-
ing trucks.

Sway control device
Sudden maneuvers, wind gusts, and buf-
feting caused by other vehicles can affect
trailer handling. Sway control devices may
be used to help control these affects. If you
choose to use one, contact a reputable
trailer hitch supplier to make sure the sway
control device will work with the vehicle,
hitch, trailer and the trailer's brake system.
Follow the instructions provided by the
manufacturer for installing and using the
sway control device.
Class I hitch
Class I trailer hitch equipment (receiver, ball
mount and hitch ball) can be used to tow
trailers of a maximum weight of 2,000 lbs.
(907 kg).
Class II hitch
Class II trailer hitch equipment (receiver,
ball mount and hitch ball) can be used to
tow trailers of a maximum weight of 3,500
lbs. (1,587 kg).
The Genuine NISSAN step bumper is con-
sidered a Class II ball mount.
Class III hitch
Class III trailer hitch equipment (receiver,
ball mount and hitch ball) can be used to
tow trailers of a maximum weight of 5,000
lbs. (2,268 kg).
Class IV hitch
Class IV trailer hitch equipment (receiver,
ball mount and hitch ball) can be used to
tow trailers of a maximum weight of 10,000
lbs. (4,535 kg). A weight distributing hitch
should be used to tow trailers that weigh
over 5,000 lbs. (2,268 kg).
Your vehicle may be equipped with Class IV
trailer hitch equipment that has a 10,000 lbs.
(4,535 kg) maximum weight rating, but your
vehicle is only capable of towing the maxi-
mum trailer weights shown in the “Towing
Load/Specification” chart in this section.
WARNING
• Do not use axle-mounted hitches.
• Do not modif y the vehicle exhaust
system, brake system, etc. to install a
trailer hitch.
• To reduce the possibility of addi-
tional damage if your vehicle is
struck from the rear, where practical,
remove the receiver when not in use.
•
Regularly check that all trailer hitch
mounting bolts are securely mounted.
Tire pressures
• When towing a trailer, inflate the
vehicle tires to the recommended
cold tire pressure indicated on the
Tire and Loading Information label.
• Trailer tire condition, size, load rat- ing and proper inflation pressure
should be in accordance with the
trailer and tire manufacturer's
specifications.
10-32
Technical and consumer information

Electric trailer brake controller
Trailers equipped with electric brakes may
require the installation of an af termarket
trailer brake controller.
A Genuine NISSAN jumper harness is avail-
able that is specifically designed to be used
when installing an af termarket brake con-
troller.
Install the af termarket electric trailer brake
controller according to the manufacturer's
instructions.
Pre-towing tips
• Be certain your vehicle maintains a levelposition when a loaded and/or unloaded
trailer is hitched. Do not drive the vehicle if
it has an abnormal nose-up or nose-
down condition; check for improper
tongue load, overload, worn suspension
or other possible causes of either condi-
tion.
• Always secure items in the trailer to pre- vent load shif t while driving.
• Keep the cargo load as low as possible in the trailer to keep the trailer center of
gravity low. • Load the trailer so approximately 60% of
the trailer load is in the front half and 40%
is in the back half. Also make sure the load
is balanced side to side.
• Check your hitch, trailer tire pressure, ve- hicle tire pressure, trailer light operation,
and trailer wheel lug nuts every time you
attach a trailer to the vehicle.
• Be certain your rearview mirrors conform to all federal, state or local regulations. If
not, install any mirrors required for towing
before driving the vehicle.
• Determine the overall height of the ve- hicle and trailer so the required clearance
is known.
Trailer towing tips
In order to gain skill and an understanding
of the vehicle's behavior, you should prac-
tice turning, stopping and backing up in an
area which is free from traffic. Steering sta-
bility and braking performance will be
somewhat different than under normal
driving conditions.
• Always secure items in the trailer to pre-vent load shif t while driving.
• Lock the trailer hitch coupler with a pin or lock to prevent the coupler from inadver-
tently becoming unlatched. • Avoid abrupt starts, acceleration or stops.
• Avoid sharp turns or lane changes.
• Always drive your vehicle at a moderate
speed.
• When backing up, hold the bottom of the steering wheel with one hand. Move your
hand in the direction in which you want
the trailer to go. Make small corrections
and back up slowly. If possible, have
someone guide you when you are back-
ing up.
Always block the wheels on both vehicle
and trailer when parking. Parking on a
slope is not recommended; however, if you
must do so:

For USA
If you believe that your vehicle has a
defect which could cause a crash or
could cause injury or death, you
should immediately inform the Na-
tional Highway Traffic Safety Admin-
istration (NHTSA) in addition to noti-
f ying NISSAN.
If NHTSA receives similar complaints,
it may open an investigation, and if it
finds that a safety defect exists in a
group of vehicles, it may order a re-
call and remedy campaign. However,
NHTSA cannot become involved in
individual problems between you,
your dealer, or NISSAN.
To contact NHTSA, you may call the
Vehicle Safety Hotline toll-free at
1-888-327-4236 (TTY: 1-800-424-9153);
go to http://www.safercar.gov; or
write to: Administrator, NHTSA, 400
Seventh Street, SW., Washington, D.C.
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 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.
REPORTING SAFETY DEFECTS
Technical and consumer information10-39

Hood release..................3-13Horn.......................2-34
I
Ignition switch
Push-button ignition switch.......5-10Immobilizer system..........2-27,5-13In-cabin microfilter..............8-17Increasing fuel economy..........5-23IndicatorNISSAN Intelligent Key® battery
discharge indicator
............5-12Indicator lights and audible reminders
(See warning/indicator lights and audible
reminders)
...................2-21Inside automatic anti-glare mirror.....3-18Instrument brightness control.......2-33Instrument panel.............0-6, 2-2Instrument panel dimmer switch.....2-33Intelligent Key systemMechanical key................3-3Remote keyless entry operation.....3-9Troubleshooting guide..........3-12Warning signals...............3-12Interior light................. .2-54iPod® Player...............4-60, 4-63
J
Jump seat.....................1-7Jump starting..............6-11,8-14
K
Key.........................3-2Key fob battery replacement........8-24Keyless entry
With Intelligent Key system
(See Intelligent Key system)
........3-9KeysNISSAN Intelligent Key®........3-2,3-8NISSAN Vehicle Immobilizer System
keys..................... .3-4
L
Labels
Air conditioner specification label. . .10-13C.M.V.S.S. certification label.......10-12Emission control information label. .10-12Engine serial number...........10-11Tire and Loading Information label. .10-13Vehicle identification number (VIN). .10-11Vehicle identification number (VIN)
plate.................... .10-11Warning labels (for SRS)..........1-85Launch bar menu...............4-9License plate
Installing the license plate........10-14LightAir bag warning light........1-85, 2-20Brake light (See stop light)........8-28Bulb check/instrument panel......2-15Bulb replacement.............8-28
Charge warning light...........2-17Exterior and Interior lights........8-28Fog light switch..............2-33Fog lights..................8-27Headlight and turn signal switch. . . .2-30Headlight control switch.........2-30Headlights..................8-26Interior light................ .2-54Light bulbs.................8-26Low tire pressure warning light.....2-18Low windshield-washer fluid
warning light................2-19Passenger air bag and status light. . .1-79Security indicator light..........2-23Warning/indicator lights and audible
reminders..................2-21Lights......................8-26Map lights................. .2-55Lock
Child safety rear door lock.........3-7Door locks................. .3-4Power door locks...........3-5, 3-6Loose fuel cap warning............2-6Low fuel warning light............2-18Low tire pressure warning light.......2-18Low windshield-washer fluid
warning light..................2-19Luggage (See vehicle loading
information)..................10-14Luggage rack (see roof rack)........2-48
11-4

R
RadioCar phone or CB radio..........4-79FM/AM/SAT radio with compact disc (CD)
player................ .4-44, 4-49Steering wheel audio control switch. .4-71Readiness for inspection maintenance (I/M)
test...................... .10-40Rear power windows.............2-51Rear seat.....................1-6Rear sliding window.............2-52Rear Sonar System (RSS)..........5-39Rear sonar system OFF switch.......2-38Rear window and outside mirror
defroster switch................2-29Rear window defroster switch.......2-29Rearview mirror................3-17RearView Monitor...............4-16Recommended Fluids............10-2Recorders
Event Data................ .10-40Refrigerant recommendation.......10-8Registering a vehicle in another
country.................... .10-11Reporting safety defects (US only). . . .10-39Roof rack....................2-48
S
Safety
Child safety rear door lock.........3-7Child seat belts. .1-28, 1-39, 1-42, 1-54, 1-65
Reporting safety defects (US only). .10-39SeatJump seat...................1-7Seat adjustmentFront manual seat adjustment......1-3Front power seat adjustment.......1-5Seat beltChild safety.................1-25Infants and small children........1-26Injured person................1-18Larger children...............1-26Precautions on seat belt usage.....1-15Pregnant women..............1-18Seat belt extenders............1-24Seat belt maintenance..........1-24Seat belts................1-15,7-6Shoulder belt height adjustment. . . .1-24Three-point type with retractor.....1-19Seat belt extenders..............1-24Seat belt warning light.........1-18,2-20Seatback pockets...............2-41SeatsAdjustment..................1-2Front seats..................1-2Manual front seat adjustment......1-3Rear seat.................. .1-6Security indicator light............2-23Security system
(NISSAN Vehicle Immobilizer System),
engine start
...............2-27,5-13Security systems
Vehicle security system.........2-25Self-adjusting brakes.............8-20Service manual order form.........10-41
Servicing air conditioner...........4-36Setting button.................4-13Shif tingAutomatic transmission.........5-15Shoulder belt height adjustment......1-24Side air bag system (See supplemental
side air bag, curtain and rollover air bag
systems)
................... .1-82Siri® Eyes-Free..............4-73,4-76Smartphone connectivity..........4-72Sonar
Rear system................5-39Spark plug replacement...........8-16Spark plugs...................8-16Specifications................ .10-9Speedometer................. .2-5Speedometer and odometer........2-4SRS warning label...............1-85Stability control................5-35Standard maintenance.........9-7,9-8Starting
Before starting the engine........5-13Jump starting.............6-11,8-14Precautions when starting and
driving.....................5-2Push starting................6-13Starting the engine
(gasoline engine only)............5-13SteeringPower steering fluid............8-10Power steering system..........5-32Tilting steering wheel...........3-16Steering wheel.................3-16Steering wheel audio control switch. . . .4-71
11-6

Using 4-Wheel Drive (4WD)..........5-23
V
Vanity mirror..................3-17Variable voltage control system......8-15Vehicle dimensions and weights.....10-10Vehicle Dynamic Control (VDC) OFF
switch......................2-36Vehicle Dynamic Control (VDC) system. .5-35Vehicle identification.............10-11Vehicle identification number (VIN). . . .10-11Vehicle identification number (VIN)
plate...................... .10-11Vehicle immobilizer system.....2-27,5-13Vehicle loading information........10-14Vehicle recovery................6-16Vehicle security system...........2-25Vehicle security system
(NISSAN Vehicle Immobilizer System),
engine start
...............2-27,5-13Ventilators...................4-22Visors......................3-16Voice Prompt Interrupt........4-82, 4-99Voice recognition system.........4-106
W
Warning
4WD warning light.............2-15Air bag warning light........1-85, 2-20Anti-lock brake warning light......2-15Battery charge warning light......2-17
Brake warning light............2-16Door open warning light.........2-17Engine oil pressure warning light. . . .2-17Hazard warning flasher switch......6-2Loose fuel cap warning..........2-6Low fuel warning light...........2-18Low tire pressure warning light.....2-18Low windshield-washer fluid warning
light......................2-19Passenger air bag and status light. . .1-79Seat belt warning light.......1-18,2-20Supplemental air bag warning
light................. .1-85, 2-20TPMS..................... .2-4Vehicle security system.........2-25Warning labels (for SRS)..........1-85Warning/indicator lights and audible
reminders..................2-21Warning lights.................2-21Warning lights, indicator lights and
audible reminders...............2-14Warning/indicator lights and audible
reminders....................2-21Audible reminders.............2-21Indicator lights...............2-21Warning lights................2-21Weights
(See dimensions and weights)......10-10Wheel/tire size................10-10Wheels and tires............8-30, 10-10When traveling or registering in another
country.....................10-11Windows....................2-49Locking passengers' windows.....2-51
Manual windows..............2-49Power windows..............2-50Rear power windows...........2-51Rear sliding window............2-52Windshield wiper blades...........8-18Windshield-washer fluid...........8-12Wiper
Wiper blades................8-18Wiper and washer switch..........2-28
11-8