Infiniti FX35, FX50 (S51). Manual - part 1583

FRONT SEAT BELT

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• For installing/removing seat belt pre-tensioner connector,

insert thin screwdriver wrapped in tape into notch, lift lock
and remove connector.

• Install connector with lock raised, and push lock into connec-

tor.

• After installing the connector, check that the lock is pushed

securely into it.

• Remove the pretensioner seat retractor fixing bolt and anchor

bolt.

4.

Remove the seat belt adjuster.
Remove the seat belt adjuster fixing bolts.

INSTALLATION

Install in the reverse order of removal.

SEAT BELT BUCKLE

SEAT BELT BUCKLE : Inspection

INFOID:0000000005243352

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 is 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-tensioner 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.

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

PHIA0953J

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FRONT SEAT BELT

SEAT BELT BUCKLE : Exploded View

INFOID:0000000005243353

SEAT BELT BUCKLE : Removal and Installation

INFOID:0000000005243354

REMOVAL

Remove the seat belt buckle.
• Remove the front seat from vehicle. Refer to 

SE-84, "Removal and Installation"

. (For ease of tool operation

in narrow space.)

• Remove the seat belt buckle harness connector and harness clamp.
• Remove the seat belt buckle fixing anchor bolt.

INSTALLATION

Install in the reverse order of removal.

1.

Anchor bolt

2.

Wave washer

3.

Seat belt buckle

4.

Plain washer

5.

Retaining washer

6.

Seat belt buckle harness connector

Refer to 

GI-4, "Components"

 for symbols in the figure.

JMHIA0705GB

REAR SEAT BELT

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REAR SEAT BELT

SEAT BELT RETRACTOR

SEAT BELT RETRACTOR : Inspection

INFOID:0000000005243355

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

2.

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 to 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. 

3.

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

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 to the retractor. 
Check the seat belt retractors with the following test(s) to determine if a retractor assembly is operating nor-
mally.

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.

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< REMOVAL AND INSTALLATION >

REAR SEAT BELT

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, or on public streets, or 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 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 rear seat belt retractor. Refer to 

SB-11, "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.

a.

Outer seat belt retractor
• The webbing can be pulled out when the angle (A) is 47

degrees or less.

• The webbing cannot be pulled out when the angle (B) is 62

degrees or more.

b.

Center seat belt retractor
• The webbing can be pulled out when the angle (A) is 24

degrees or less.

• The webbing cannot be pulled out when the angle (B) is 39

degrees or more.

3.

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

A and B

: Tilting angles

: Vehicle front

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A and B

: Tilting angles

: Vehicle front

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