2021 NISSAN FRONTIER ECU

For additional information, refer to all Warn-
ings and Cautions in the “Child safety” and
“Child restraints” sections of this manual
before installing a child restraint.
Do not use the lower anchors if the com-
bined weight of the child and the child re-
straint exceeds 65 lbs. (29.5 kg). If the com-
bined weight of the child and the child
restraint is greater than 65 lbs. (29.5 kg), use
the vehicle's seat belt (not the lower an-
chors) to install the child restraint. Be sure
to follow the child restraint manufacturer's
instructions for installation.Follow these steps to install a forward-
facing child restraint using the vehicle seat
belt in the rear seats (Crew Cab models) or
in the front passenger seat:
1.
If you must install a child restraint in the
front seat, it should be placed in a
forward-facing direction only. Move the
seat to the rearmost position. Child re-
straints for infants must be used in the
rear-facing direction and therefore
must not be used in the front seat.
2. Position the child restraint on the seat. Always follow the child restraint manu-
facturer’s instructions.
The back of the child restraint should be
secured against the vehicle seatback.
If necessary, adjust or remove the head
restraint/headrest to obtain the correct
child restraint fit. If the head restraint/
headrest is removed, store it in a secure
place.
Be sure to reinstall the head
restraint/headrest when the child restraint
is removed. For additional information, refer
to “Head restraints/headrests” in this section.
If the seating position does not have an
adjustable head restraint/headrest and
it is interfering with the proper child re-
straint fit, try another seating position or
a different child restraint. 3. Route the seat belt tongue through the
child restraint and insert it into the
buckle until you hear and feel the latch
engage. Be sure to follow the child re-
straint manufacturer’s instructions for
belt routing.
If the child restraint is equipped with a
top tether strap, route the top tether
strap and secure the tether strap to the
tether anchor point (rear seat installa-
tion only). For additional information, re-
fer to “Installing top tether strap” in this
section.
WRS0699
Forward-facing (front passenger seat) – step 1
Safety-Seats, seat belts and supplemental restraint system1-55

6. Remove any additional slack from theseat belt; press downward and rear-
ward firmly in the center of the child re-
straint with your knee to compress the
vehicle seat cushion and seatback while
pulling up on the seat belt.
7. Tighten the tether strap according to the manufacturer's instructions to remove
any slack. 8. Af ter attaching the child restraint, test it
before you place the child in it. Push it
from side to side while holding the child
restraint near the seat belt path. The
child restraint should not move more
than 1 inch (25 mm), from side to side. Try
to tug it forward and check to see if the
seat belt holds the restraint in place. If
the restraint is not secure, tighten the
seat belt as necessary, or put the re-
straint in another seat and test it again.
You may need to try a different child
restraint. Not all child restraints fit in all
types of vehicles. 9. Check to make sure the child restraint is
properly secured prior to each use. If the
seat belt is not locked, repeat steps 3
through 8.
WRS0681
Forward-facing – step 6
Safety-Seats, seat belts and supplemental restraint system1-57

10. If the child restraint is installed in thefront passenger seat, place the ignition
switch in the ON position. The front
passenger air bag status light
should illuminate. If this light is not illu-
minated, refer to "Front passenger air
bag and status light" in this section.
Move the child restraint to another
seating position. Have the system
checked. It is recommended that you
visit a NISSAN dealer for this service.
Af ter the child restraint is removed and the
seat belt is fully retracted, the ALR mode
(child restraint mode) is canceled.
Installing top tether strap (rear
bench seat for Crew Cab models)
To access the anchor points behind the
rear bench seat, tilt the rear seatback for-
ward by lif ting up on the pull strap behind
the seatback. The child restraint top tether strap must be
used when installing the child restraint with
the seat belts.
First, secure the child restraint with the seat
belt.
1. If necessary, raise or remove the head
restraint/headrest to position the top
tether strap as shown. If the head
restraint/headrest is removed, store it in
WRS0475
Forward-facing – step 10
LRS0576
Rear bench seat (Crew Cab models)
1. Top tether strap
2. Tether strap
3. Tether anchor point
1-58Safety-Seats, seat belts and supplemental restraint system

a secure place. Be sure to reinstall the
head restraint/headrest when the child
restraint is removed.For additional in-
formation, refer to “Head restraints/
headrests” in this section.
2. Position the top tether strap as shown.
3. Secure the tether strap to the tether an- chor point as shown.
4. Return the seatback to the locked position.
5. Refer back to child restraint installation steps before tightening the tether strap.
If you have any questions when install-
ing a top tether strap, it is recommended
that you visit a NISSAN dealer for this
service.
FORWARD-FACING CHILD
RESTRAINT INSTALLATION USING
THE SEAT BELTS — FRONT
PASSENGER AND JUMP SEATS
(King Cab® models)

3. Position the child restraint on the seat.Always follow the child restraint manu-
facturer’s instructions.
The back of the child restraint should be
secured against the vehicle seatback.
If necessary, adjust or remove the head
restraint/headrest to obtain the correct
child restraint fit. If the head restraint/
headrest is removed, store it in a secure
place. Be sure to reinstall the head
restraint/headrest when the child re-
straint is removed. For additional infor-
mation, refer to “Head restraints/
headrests” in this section. If the seating position does not have an
adjustable head restraint/headrest and
it is interfering with the proper child re-
straint fit, try another seating position or
a different child restraint.
4.Route the seat belt tongue through the
child restraint and insert it into the buckle
until you hear and feel the latch engage.
Be sure to follow the child restraint manu-
facturer's instructions for belt routing.
If the child restraint is equipped with a top
tether strap, route the top tether strap and
secure the tether strap to the tether an-
chor point. For additional information, refer
to “Installing top tether strap” in this section.
Do not install child restraints that require
the use of a top tether strap to seating
positions that do not have a top tether
anchor.
WRS0919
Forward-facing — step 3
Safety-Seats, seat belts and supplemental restraint system1-61

9. Af ter attaching the child restraint, test itbefore you place the child in it. Push it
from side to side while holding the seat
near the seat belt path. The child re-
straint should not move more than 1
inch (25 mm) from side to side. Try to tug
it forward and check to see if the belt
holds the restraint in place. If the re-
straint is not secure, tighten the belt as
necessary, or put the restraint in another
seat and test it again. You may need to
try a different child restraint. Not all child
restraints fit in all types of vehicles. 10. Check to make sure that the child re-
straint is properly secured prior to each
use. If the seat belt is not locked, repeat
steps 3 through 9.
11. If the child restraint is installed in thefront passenger seat, place the ignition
switch in the ON position. The front pas-
senger air bag status light
should
illuminate. If this light is not illuminated,
refer to “Front passenger air bag and
status light” in this section. Move the
child restraint to another seating po-
sition. Have the system checked. It is
recommended that you visit a NISSAN
dealer for this service.
Af ter the child restraint is removed and the
seat belt is fully retracted, the ALR mode
(child restraint mode) is canceled.
WRS0698
Forward-facing — step 9
Safety-Seats, seat belts and supplemental restraint system1-63

2. Position the booster seat on the seat.Only place it in a front-facing direction.
Always follow the booster seat manu-
facturer’s instructions.
3. The booster seat should be positioned on the vehicle seat so that it is stable.
If necessary, adjust or remove the head
restraint/headrest to obtain the correct
booster seat fit. If the head restraint/
headrest is removed, store it in a secure
place. Be sure to reinstall the head
restraint/headrest when the booster
seat is removed. For additional infor-
mation, refer to “Head restraint/
headrest” in this section. If the seating position does not have an
adjustable head restraint/headrest and
it is interfering with the proper booster
seat fit, try another seating position or a
different booster seat.
4. Position the lap portion of the seat belt low and snug on the child’s hips. Be sure
to follow the booster seat manufactur-
er’s instructions for adjusting the seat
belt routing.
5. Pull the shoulder belt portion of the seat belt toward the retractor to take up ex-
tra slack. Be sure the shoulder belt is
positioned across the top, middle por-
tion of the child’s shoulder. Be sure to
follow the booster seat manufacturer’s
instructions for adjusting the seat belt
routing.
6. Follow the warnings, cautions and in- structions for properly fastening a seat
belt shown in “Three-point type seat belt
with retractor” in this section.
PRECAUTIONS ON SRS
This SRS section contains important infor-
mation concerning the following systems:
• Driver and front passenger supplementalfront-impact air bag (NISSAN Advanced
Air Bag System)
• Front seat-mounted side-impact supple- mental air bag
• Roof-mounted curtain side-impact and rollover supplemental air bag
• Seat belt with pretensioner(s) (front seats)
Supplemental front-impact air bag sys-
tem
The NISSAN Advanced Air Bag System can
help cushion the impact force to the head
and chest of the driver and front passenger
in certain frontal collisions.
Front seat-mounted side-impact
supplemental air bag system
This system can help cushion the impact
force to the chest area of the driver and
front passenger in certain side-impact col-
lisions. The side air bags are designed to
inflate on the side where the vehicle is im-
pacted.
LRS0539
SUPPLEMENTAL RESTRAINT SYSTEM
(SRS)

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.
One sensor used is the occupant classifi-
cation sensor (pressure sensor). It is in the
bottom of the front passenger seat cush-
ion and is designed to detect an occupant
and objects on the seat by weight. It works
together with seat belt sensors described
in this section. 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 causethe air bag to turn OFF. Occupant classifi-
cation sensor operation can vary depend-
ing on the front passenger seat belt sen-
sors.
The front passenger seat belt sensors are
designed to detect if the seat belt is buck-
led and the amount of tension on the seat
belt, such as when it is in the Automatic
Locking Retractor (ALR) mode (child re-
straint mode). Based on the weight on the
seat detected by the occupant classifica-
tion sensor and the belt tension detected
on the seat belt, the NISSAN Advanced Air
Bag System determines whether the front
passenger air bag should be automatically
turned OFF as required by the regulations.
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 does not sit in the seat properly (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. In addition, if the
occupant improperly uses the seat belt in
the ALR mode, this could cause the air bag
to be turned OFF. Always be sure to be
seated and wearing the seat belt properly
for the most effective protection by the
seat belt and supplemental 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 and seat belt sensors are de-
signed to operate as described above to
turn the front passenger air bag OFF for
specified child restraints as required by the
regulations. Failing to properly secure child
restraints and to use the ALR mode may
allow the restraint to tip or move in a colli-
sion or sudden stop. This can also result in
the passenger air bag inflating in a crash
instead of being OFF. For additional infor-
mation, refer to “Child restraints” in this sec-
tion.
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
1-80Safety-Seats, seat belts and supplemental restraint system