ECU NISSAN FRONTIER 2021 Service Manual

HOW TO USE THE REMOTE
KEYLESS ENTRY FUNCTION
The remote keyless entry function can op-
erate all door locks using the remote key-
less function of the Intelligent Key. The re-
mote keyless function can operate at a
distance of 99 f t (30 m) away from the ve-
hicle. The operating distance depends
upon the conditions around the vehicle.The remote keyless entry function may not
function under the following conditions:
• When the Intelligent Key is not within the
operational range.
• When the doors are open or not closed securely.
• When the Intelligent Key battery is dis- charged.
button on the Intelli-
gent Key.
4. The hazard indicator lights flash twice and the horn beeps once.
5. All doors will be locked.
button on the Intelligent
Key to unlock the driver’s door.
2. The hazard warning lights flash once.
3. Press the
button again within 5
seconds to unlock all doors.
All doors will be locked automatically un-
less one of the following operations is per-
formed within 1 minute af ter pressing the
button:
• Opening any doors.
• Pushing the ignition switch.
The interior lights will illuminate for a period
of time when a door is unlocked and the
interior lights switch is in the O (DOOR) po-
sition.
LPD3600
1.(lock) button
2.
(unlock) button
3.
(panic) button

Foldable outside mirrors
Pull the outside mirror toward the door to
fold it.
Heated mirrors (if so equipped)
Some outside mirrors can be heated to
defog, defrost or de-ice for improved visibil-
ity. For additional information, refer to “Rear
window and outside mirror (if so equipped)
defroster switch” in the “Instruments and
controls” section of this manual.
TAILGATE
Opening the tailgate
Pull the tailgate handle upward and lower
the tailgate. The support cables hold the
tailgate open.
When closing the tailgate, make sure the
latches are securely locked.
Do not drive the vehicle with the tailgate
down, unless equipped with NISSAN's
Bed Extender (accessory) or equivalent
in the extended position.For additional information on proper truck
box loading, refer to “Vehicle loading infor-
mation” in the “Technical and consumer in-
formation” section of this manual.
LPD0270
TRUCK BOX

Connecting the rear camera
Before closing the tailgate reconnect the
rear camera by performing the following:
1. Af ter attaching the rear tailgate to thetruck, keep the tailgate open and check
that the tailgate harness is not hanging
below the tailgate.
2. Remove the connector bracket
O2from
the sill by pressing the locking tab in-
ward, in the direction shown, while pull-
ing the bracket apart. 3. Disconnect the chassis plug and
bracket from the chassis wiring harness
O3. Keep the connector and bracket in a
safe place such as the glove box.
4. Disconnect the tailgate plug from the tailgate wiring harness. Keep the tail-
gate plug in a safe place such as the
glove box.
5. Connect the tailgate wiring harness to the chassis wiring harness.
6. Securely fix the rear camera connector bracket
O1to the rear sill.
7. Close the tailgate securely.
Locking the tailgate
To lock the tailgate, turn the key toward the
passenger side of the vehicle
O1. To unlock,
turn the key toward the driver side
O2.
LPD2097LPD0272

NOTE:
Use care when rotating extender, buck-
les may come in contact with the truck
bed railing.
Removing and installing the bed
extender
To remove or install the bed extender per-
form the following:
1. Open the tailgate.
2. Rotate the bed extender into a verticalposition and lif t straight up (to remove)
or lower straight down (to install).
To store the bed extender in the front of the
truck when not in use perform the follow-
ing:
1. Position the sliding brackets past the center of the wheel well.
2. Re-install the extender into the brackets (see above).
3. Rotate the extender to the inward position.
4. Push the brackets forward until the ex- tender comes in contact with the front
wall of the truck box.
TIE DOWN HOOKS (if so equipped)
For your convenience, tie down hooks are
placed at each corner of the truck box.
These may be used to help secure cargo
loaded into the truck box.
• The weight of the cargo load must beevenly distributed over both the front and
the rear axles.
• All cargo should be securely fastened with ropes or straps to prevent it from
shif ting or sliding within the vehicle.

WARNING
• Do not leave children or adults who
would normally require the assis-
tance of others alone in your vehicle.
Pets should also not be lef t alone.
They could accidentally injure them-
selves or others through inadvertent
operation of the vehicle. Also, on hot,
sunny days, temperatures in a closed
vehicle could quickly become high
enough to cause severe or possibly
fatal injuries to people or animals.
• Properly secure all cargo with ropes
or straps to help prevent it from slid-
ing or shif ting. Do not place cargo
higher than the seatbacks. In a sud-
den stop or collision, unsecured
cargo could cause personal injury.
EXHAUST GAS (carbon monoxide)air recirculation but-
ton to off and the fan control dial
to high to circulate the air.
• If electrical wiring or other cable con-
nections must pass to a trailer
through the seal on the lif tgate or the
body, follow the manufacturer's rec-
ommendation to prevent carbon
monoxide entry into the vehicle. •
The exhaust system and body should
be inspected by a qualified mechanic
whenever:
a. The vehicle is raised for service.
b. You suspect that exhaust fumes are entering into the passenger
compartment.
c. You notice a change in the sound of the exhaust system.
d. You have had an accident involv- ing damage to the exhaust sys-
tem, underbody, or rear of the
vehicle.
• If a special body, camper, or other
equipment is added for recreational
or other usage, follow the manufac-
turer's recommendation to prevent
carbon monoxide entry into the ve-
hicle. Do not occupy these areas
while the engine is running even if
the vehicle is parked. Some recre-
ational vehicle appliances such as
stoves, refrigerators, heaters, etc.
may also generate carbon monoxide.
PRECAUTIONS WHEN STARTING AND
DRIVING
5-2Starting and driving

•If your engine stalls or you cannot
make it to the top of a steep hill,
never attempt to turn around. Your
vehicle could tip or roll over. Always
back straight down in R (Reverse)
gear. Never back down in N (Neutral),
using only the brake, as this could
cause loss of control.
• Heavy braking going down a hill
could cause your brakes to overheat
and fade, resulting in loss of control
and an accident. Apply brakes lightly
and use a low gear to control your
speed. Use the hill descent control
feature (if so equipped).
• Unsecured cargo can be thrown
around when driving over rough ter-
rain. Properly secure all cargo so it
will not be thrown forward and cause
injury to you or your passengers.
• To avoid raising the center of gravity
excessively, do not exceed the rated
capacity of the roof rack (if so
equipped) and evenly distribute the
load. Secure heavy loads in the cargo
area as far forward and as low as
possible. Do not equip the vehicle
with tires larger than specified in this
manual. This could cause your ve-
hicle to roll over. •
Do not grip the inside or spokes of
the steering wheel when driving off-
road. The steering wheel could move
suddenly and injure your hands. In-
stead drive with your fingers and
thumbs on the outside of the rim.
• Before operating the vehicle, ensure
that the driver and all passengers
have their seat belts fastened.
• Always drive with the floor mats in
place as the floor may become hot.
• Lower your speed when encounter-
ing strong crosswinds. With a higher
center of gravity, your NISSAN is more
affected by strong side winds. Slower
speeds ensure better vehicle control.
• Do not drive beyond the perfor-
mance capability of the tires, even
with 4WD engaged (if so equipped).
• For 4WD equipped vehicles, do not
attempt to raise two wheels off the
ground and shif t the transmission to
any drive or reverse position with the
engine running. Doing so may result
in drivetrain damage or unexpected
vehicle movement which could result
in serious vehicle damage or per-
sonal injury. •
Do not attempt to test a 4WD
equipped vehicle on a 2-wheel dyna-
mometer (such as the dynamom-
eters used by some states for emis-
sions testing), or similar equipment
even if the other two wheels are
raised off the ground. Make sure you
inform test facility personnel that
your vehicle is equipped with 4WD
before it is placed on a dynamom-
eter. Using the wrong test equipment
may result in drivetrain damage or
unexpected vehicle movement
which could result in serious vehicle
damage or personal injury.
• Accelerating quickly, sharp steering
maneuvers or sudden braking may
cause loss of control.
• If at all possible, avoid sharp turning
maneuvers, particularly at high
speeds. Your NISSAN 4WD vehicle has
a higher center of gravity than a pas-
senger car. The vehicle is not de-
signed for cornering at the same
speeds as passenger cars. Failure to
operate this vehicle correctly could
result in loss of control and/or a roll-
over accident.
Starting and driving5-9

•Always use tires of the same type,
size, brand, construction (bias, bias-
belted, or radial), and tread pattern
on all four wheels. Install tire chains
on the rear wheels when driving on
slippery roads and drive carefully.
• Be sure to check the brakes immedi-
ately af ter driving in mud or water.
For additional information, refer to
“Wet brakes” in this section.
• Avoid parking your vehicle on steep
hills. If you get out of the vehicle and
it rolls forward, backward or side-
ways, you could be injured.
• Whenever you drive off-road through
sand, mud or water as deep as the
wheel hub, more frequent mainte-
nance may be required. For addi-
tional information, refer to “Mainte-
nance under severe operating
conditions” in the “Maintenance and
schedules” section of this manual.
WARNING
Do not operate the push-button igni-
tion switch while driving the vehicle ex-
cept in an emergency. (The engine will
stop when the ignition switch is pushed
three consecutive times in quick suc-
cession or the ignition switch is pushed
and held for more than 2 seconds.) If
the engine stops while the vehicle is
being driven, this could lead to a crash
and serious injury. When the ignition switch is pushed without
depressing the brake pedal, the ignition
switch position will illuminate as follows:
Push center:
• Once to change to ACC.
• Two times to change to ON.
• Three times to return to OFF.
The ignition switch will automatically re-
turn to the LOCK position when any door is
either opened or closed with the switch in
the OFF position.
The shif t lever can be moved from the P
(Park) position if the ignition switch is in
the ON position and the brake pedal is
depressed.
If the battery of the vehicle is discharged,
the ignition switch cannot be moved
from the LOCK position.
Some indicators and warnings for opera-
tion are displayed in the meter. For addi-
tional information, refer to “Warning lights,
indicator lights and audible reminders” in
the “Instruments and controls” section of
this manual.
LSD3828
PUSH-BUTTON IGNITION SWITCH

AUTO ACC:
With the vehicle in the P (Park) position, the
Intelligent Key with you, and the ignition
switch placed from the ON to the OFF po-
sition, the radio can still be used for a period
of time, or until the driver’s door is opened.
Af ter a period of time, functions such as
radio, navigation, and Bluetooth® Hands-
Free Phone System may be restarted by
pressing the “ON-OFF button/VOLUME
control knob” or the key fob unlock button.
For additional information, refer to “Monitor,
climate, audio, phone and voice recogni-
tion systems” in this manual.
EMERGENCY ENGINE SHUT OFF
To shut off the engine in an emergency
situation while driving, perform the follow-
ing procedure:
• Rapidly push the ignition switch threeconsecutive times in less than 1.5 sec-
onds, or
• Push and hold the ignition switch for more than 2 seconds.
NISSAN INTELLIGENT KEY®
BATTERY DISCHARGE
If the battery of the NISSAN Intelligent Key®
is discharged or environmental conditions
interfere with the Intelligent Key operation,
start the engine according to the following
procedure:
1. Place the shif t lever in the P (Park) position.
2. Firmly apply the foot brake. 3. Touch the ignition switch with the Intel-
ligent Key as illustrated. (A chime will
sound.)
Af ter step 3 is performed, when the igni-
tion switch is pushed without depress-
ing the brake pedal, the ignition switch
position will change to the ACC position.
4. Push the ignition switch while depress- ing the brake pedal within 10 seconds
af ter the chime sounds. The engine will
start.
NOTE:
• When the ignition switch is pushed tothe ACC or ON position or the engine is
started by the above procedure, the In-
telligent Key battery discharge warn-
ing light appears in the meter even
when the Intelligent Key is inside the
vehicle. This is not a malfunction. To
turn off the Intelligent Key battery dis-
charge warning light, touch the igni-
tion switch with the Intelligent Key
again.
• If the Intelligent Key battery discharge warning light appears, replace the bat-
tery as soon as possible. For additional
information, refer to “Battery replace-
ment” in the “Do-it-yourself ” section of
this manual.
5-12Starting and driving

To shut off the engine in an emergency
situation while driving, perform the follow-
ing procedure:
– Rapidly push the push-button ignitionswitch three consecutive times in less
than 1.5 seconds, or
– Push and hold the push-button ignition switch for more than 2 seconds.TIRE PRESSURE MONITORING
SYSTEM (TPMS)
This vehicle is equipped with TPMS. It moni-
tors tire pressure of all tires except the
spare. When the low tire pressure warning
light is lit, and the CHECK TIRE PRES (pres-
sure) warning message is displayed in the
odometer, one or more of your tires is sig-
nificantly under-inflated. If the vehicle is be-
ing driven with low tire pressure, the TPMS
will activate and warn you of it by the low
tire pressure warning light. This system will
activate only when the vehicle is driven at
speeds above 16 mph (25 km/h). For addi-
tional information, refer to “Warning lights,
indicator lights and audible reminders” in
the “Instruments and Controls” section,
and “Tire Pressure Monitoring System
(TPMS)” in the “Starting and driving” section
of this manual.

3. Install the assembled jacking rod intothe jack as shown.
4. To lif t the vehicle, securely hold the jack- ing lever and rod. Carefully raise the ve-
hicle until the tire clears the ground.
5. Remove the wheel nuts and then re- move the tire.
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 surfacebetween 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 (
O1,O2,O3,O4,O5,O6)
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
(
O1,O2,O3,O4,O5,O6). Lower the vehicle
completely .
WCE0063
6-10In case of emergency