Nissan Sentra. Instruction — part 741
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< BASIC INSPECTION >
COMPONENT INSPECTION
SEAT BELT RETRACTOR ON-VEHICLE CHECK
Emergency Locking Retractors (ELR) and Automatic Locking Retractors (ALR)
NOTE:
All seat belt retractors are Emergency Locking Retractors (ELR) type. In an emergency (sudden stop) the
retractor will lock and prevent the webbing from extending any further. All 3-point type seat belt retractors
except the driver seat belt also have an Automatic Locking Retractors (ALR) mode. The ALR mode (also
called child restraint mode) is used when installing child seats. The ALR mode is activated when the seat belt
is fully extended. When the webbing is then retracted partially, the ALR mode automatically locks the seat belt
in a specific position so the webbing cannot be extended any further. To cancel the ALR mode, allow the seat
belt to fully wind back into the retractor.
Check the seat belt retractors with the following test(s) to determine if a retractor assembly is operating prop-
erly.
ELR Function Stationary Check
Grasp the shoulder webbing and pull forward quickly. The retractor should lock and prevent the belt from
extending further.
ALR Function Stationary Check
1. Pull out the entire length of seat belt from retractor until a click is heard.
2. Retract the webbing partially. A clicking noise should be heard as the webbing retracts, indicating that the
retractor is in the Automatic Locking Retractors (ALR) mode.
3. Grasp the seat belt and try to pull out the retractor. The webbing must lock and not extend any further. If it
does not operate normally, replace the retractor assembly.
4. Allow the entire length of the webbing to retract to cancel the automatic locking mode.
ELR Function Moving Check
WARNING:
Perform the following test in a safe, open area clear of other vehicles and obstructions (for example, a
large, empty parking lot). Road surface must be paved and dry. Do not perform the following test on
wet or gravel roads or on public streets and highways. This could result in an accident and serious
personal injury. The driver and passenger must be prepared to brace themselves in the event that the
retractor does not lock.
1. Fasten driver seat belt. Buckle a passenger into the seat for the belt that is to be tested.
2. Proceed to the designated safe area.
3. Drive the vehicle at approximately 16 km/h (10 mph). Notify any passengers of a pending sudden stop
and the driver and passenger must be prepared to brace themselves in the event that the retractor does
not lock. Apply brakes firmly and make a very hard stop.
During stopping, seat belts should lock and not be extended. If the seat belt retractor assembly does not lock,
perform the retractor off-vehicle check.
FRONT SEAT BELT RETRACTOR OFF-VEHICLE CHECK
1. Remove the front seat belt retractor. Refer to
SB-8, "Removal and Installation"
2. Slowly pull out webbing while tilting the seat belt retractor forward from the mounted position without twist-
ing the seat belt retractor as shown.
A: The webbing can be pulled out if the retractor is tilted 15
°
degree or less.
B: The webbing can not be pulled out if the retractor is tilted 45
°
degrees or more.
NOTE:
A and B show tilting angles.
: Front
3. Replace the seat belt retractor if it does not operate within specifications.
REAR SEAT BELT RETRACTOR OFF-VEHICLE CHECK
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COMPONENT INSPECTION
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< BASIC INSPECTION >
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1. Remove the rear seat belt retractor. Refer to
SB-11, "Removal and Installation - Seat Belt Retractor"
.
2. Slowly pull out webbing while tilting the seat belt retractor forward from the mounted position without twist-
ing the seat belt retractor as shown.
A: The webbing can be pulled out if the retractor is tilted 15
°
degree or less.
B: The webbing can not be pulled out if the retractor is tilted 35
°
degrees or more.
NOTE:
A and B show tilting angles.
: Front
3. Replace the seat belt retractor if it does not operate within specifications.
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SB-8
< REMOVAL AND INSTALLATION >
FRONT SEAT BELT
REMOVAL AND INSTALLATION
FRONT SEAT BELT
Exploded View
INFOID:0000000009756328
NOTE:
LH side shown; RH side similar.
Removal and Installation
INFOID:0000000009756329
SEAT BELT RETRACTOR
Removal
CAUTION:
1.
D-ring anchor
2.
Seat belt height adjuster cover
3.
Seat belt buckle
4.
Seat belt retractor
5.
Seat belt height adjuster
A.
Lap belt pre-tensioner harness
connector
B.
Shoulder belt pre-tensioner
harness connector
Front
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FRONT SEAT BELT
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Before servicing the SRS, turn the ignition switch off, disconnect both battery terminals and wait at
least three minutes.
1. Disconnect both the negative and positive battery terminals, then wait at least three minutes. Refer to
50, "Removal and Installation (Battery)"
.
2. Slide the front seat to the full forward position.
3. Remove the center pillar lower finisher. Refer to
INT-27, "CENTER PILLAR LOWER FINISHER : Removal
4. Release the floor trim hold downs (1) and pull floor trim back.
(B): Lap belt pre-tensioner anchor bolt
5. Disconnect the harness connector (A) from the lap belt pre-ten-
sioner.
CAUTION:
• For removing/installing the lap belt pre-tensioner harness
connector, insert a thin screwdriver wrapped in tape into the
notch, then lift the lock and remove the harness connector as
shown.
• Install the harness connector with the lock raised, and push
the lock into the harness connector as shown.
• After installing the harness connector, check that the lock is
pushed in securely.
6. Remove the lap belt pre-tensioner anchor bolt.
7. Remove the seat belt height adjuster cover, then remove D-ring anchor bolt.
8. Disconnect the harness connector from the shoulder belt pre-tensioner.
CAUTION:
• For removing/installing the shoulder belt pre-tensioner
harness connector, insert a thin screwdriver wrapped in
tape into the notch, then lift the lock and remove the har-
ness connector as shown.
• Install the harness connector with the lock raised, and
push the lock into the harness connector as shown.
• After installing the harness connector, check that the lock
is pushed in securely.
9. Remove the seat belt retractor anchor bolt and upper bolt, then remove the seat belt retractor.
Installation
Installation is in the reverse order of removal.
• Install the seat belt retractor upper bolt first.
• Make sure the seat belt height adjuster is locked in the lowest position during installation.
• Tighten the seat belt retractor bolts to specification. Refer to
.
• Make sure both the D-ring anchor and seat belt height adjuster operate freely.
• Always perform an inspection after repair to be sure the system is functioning within specifications. Refer to
.
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