Infiniti FX35, FX50 (S51). Manual - part 1582

PRECAUTIONS

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• The seat belt is in use at the time of a collision (except for minor collisions and the belts, retractors, and

buckles show no damage and continue to operate normaly).

• The seat belt is damaged in an accident (i.e. torn webbing, bent retractor or guide).
• The seat belt attaching point is damaged in an accident. Inspect the seat belt attaching area for damage or

distortion and repair as necessary before installing a new seat belt assembly.

• Anchor bolts are deformed or worn out.
• The front seat belt pre-tensioner must be replaced even if the seat belts are not in use during the collision in

which the air bags are deployed.

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< REMOVAL AND INSTALLATION >

FRONT SEAT BELT

REMOVAL AND INSTALLATION

FRONT SEAT BELT

SEAT BELT RETRACTOR

SEAT BELT RETRACTOR : Inspection

INFOID:0000000005243349

AFTER A COLLISION

WARNING:

Inspect all seat belt assemblies including retractors and attached hardware after any collision.
NISSAN/INFINITI recommends that all seat belt assemblies in use during a collision be replaced
unless the collision was minor and the belts show no damage and continue to operate normally. Not
doing so could result in serious personal injury in an accident. Seat belt assemblies not in use during
a collision should also be replaced if either damage or improper operation is noted. Seat belt pre-ten-
sioners should be replaced even if the seat belts are not in use during a frontal collision in which the
air bags are deployed.
Replace any seat belt assembly (including anchor bolts) if:
• The seat belt is in use at the time of a collision (except for minor collisions and the belts, retractors, and

buckles show no damage and continue to operate normally).

• The seat belt is damaged in an accident (i.e. torn webbing, bent retractor, or guide, etc.).
• The seat belt attaching point is damaged in an accident. Inspect the seat belt attaching area for damage or

distortion and repair if necessary before installing a new seat belt assembly.

• Anchor bolts are deformed or worn out.
• The seat belt pre-tensioners should be replaced even if the seat belts are not in use during the collision in

which the air bags are deployed.

PRELIMINARY CHECKS

1.

Check the seat belt warning lamp for proper operation as per the following:

a.

Turn ignition switch ON. The seat belt warning lamp should illuminate.

b.

Fasten driver seat belt. The seat belt warning lamp should turn OFF.

2.

If the air bag warning lamp is blinking, perform self-diagnosis using CONSULT-III and air bag warning
lamp. Refer to 

SRC-16, "Diagnosis Description"

.

3.

Check that the seat belt retractor, seat belt anchor, and buckle bolts are tightened firmly.

4.

Check the shoulder seat belt guide and shoulder belt height adjuster for front seats. Check that guide
swivels freely and that webbing lays flat and does not bind in guide. Check that height adjuster operate
normally and holds securely.

5.

Check retractor operation:

a.

Fully extend the seat belt webbing and check for twists, tears, or other damage.

b.

Allow the seat belt to retract. Check that webbing returns smoothly and completely into the retractor. If the
seat belt does not return smoothly, wipe the inside of the loops with a clean paper cloth. Dirt build-up in the
loops of the upper anchors can cause the seat belts to retract slowly.

c.

Fasten the seat belt. Check that seat belt returns smoothly and completely to the retractor. If the webbing
does not return smoothly, the cause may be an accumulation of dust or dirt. Use the “SEAT BELT TAPE
SET” and perform the following steps. 

Inspect the front seat belt through-anchor 

1.

Pull the seat belt out to a length of 500 mm (19.69 in) or more.

2.

Fix the seat belt at the center pillar webbing opening with a clip or similar device.

3.

Pass a thin wire through the through-anchor webbing opening. Hold both ends of the wire and pull it
tightly while moving it up and down several times along the webbing opening surface to remove dirt
stuck there. 

4.

Any dirt that cannot be removed with the wire can be removed by cleaning the opening with a clean
cloth.

5.

Apply tape at the point where the webbing contacts the through-anchor webbing opening. 
NOTE:
Apply the tape so that there is no slack or wrinkling.

6.

Remove the clip fixing the seat belt and check that the webbing returns smoothly.

6.

Repeat the steps above if necessary to check the other seat belts.

FRONT SEAT BELT

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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 locks and prevents 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 that 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. Never perform the following test on
wet or gravel roads, public streets, or and highways. This could result in an accident and serious per-
sonal 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 that 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.

SEAT BELT RETRACTOR OFF-VEHICLE CHECK

1.

Remove the front seat belt retractor. Refer to 

SB-6, "SEAT BELT RETRACTOR : Removal and Installa-

tion"

.

2.

Slowly pull out webbing while tilting the retractor assembly forward from the mounted position without
twisting the retractor assembly as shown in the figure.
• The webbing can be pulled out when the angle (A) is 22

degrees or less.

• The webbing cannot be pulled out when the angle (B) is 37

degrees or more.

3.

Replace the seat belt assembly if it does not operate normally.

A and B

: Tilting angles

: Vehicle front

PHIA0954J

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< REMOVAL AND INSTALLATION >

FRONT SEAT BELT

SEAT BELT RETRACTOR : Exploded View

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SEAT BELT RETRACTOR : Removal and Installation

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REMOVAL

CAUTION:

Before servicing SRS, turn the ignition switch OFF, disconnect the battery negative terminal, and wait
at least 3 minutes.

REMOVAL

1.

Remove the outer anchor.
• Remove the outer anchor cover.
• Remove the seat belt anchor fixing anchor bolt.

2.

Remove the shoulder anchor.
• Remove the center pillar upper and lower garnish. Refer to 

INT-17, "Removal and Installation"

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• Remove the shoulder anchor fixing anchor nut.

3.

Remove the seat belt assembly.
• Disconnect the seat belt pre-tensioner connector and pre-crash seat belt connector.

NOTE:

1.

Pre-tensioner seat belt retractor

2.

Anchor bolt

3.

Pre-crash seat belt connector

4.

Seat belt pre-tensioner connector

5.

Outer anchor cover

6.

Outer anchor

7.

Spacer

8.

Spring washer

9.

Retaining washer

10. Anchor nut

11.

Shoulder anchor

12. Seat belt adjuster

Refer to 

GI-4, "Components"

 for symbols in the figure.

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