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Nissan Xterra. Manual - part 578

COMPONENT INSPECTION

SB-3

< BASIC 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-6, "Removal and Installation of Front Seat Belt"

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.

REAR SEAT BELT RETRACTOR OFF-VEHICLE CHECK

JMHIA1056ZZ

SB-4

< BASIC INSPECTION >

COMPONENT INSPECTION

1. Remove the rear seat belt retractor. Refer to

SB-8, "Removal and Installation of Rear Seat Belt"

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.

REAR SEAT BELT CENTER RETRACTOR OFF-VEHICLE CHECK

1. Remove the rear seat belt center retractor. Refer to

SB-8, "Removal and Installation of Rear Seat Belt"

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.

JMHIA1064ZZ

JMHIA0561ZZ

PRECAUTIONS

SB-5

< PRECAUTION >

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"

INFOID:0000000010219714

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along

with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain

types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS

system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front

air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SR and SB section of this Service Man-

ual.

WARNING:

• To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death in

the event of a collision which would result in air bag inflation, all maintenance must be performed by

an authorized NISSAN/INFINITI dealer.

• Improper maintenance, including incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-

ness connectors.

PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS

WARNING:

• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-

tion ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s) with a

hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly causing

serious injury.

• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the

battery and wait at least three minutes before performing any service.

Precaution for Seat Belt Service

INFOID:0000000009485356

CAUTION:

• Before removing the seat belt pre-tensioner assembly, turn the ignition switch OFF, disconnect both

battery terminals and wait at least three minutes.

• After replacing or reinstalling seat belt pre-tensioner assembly, or reconnecting seat belt pre-ten-

sioner assembly connector, ensure entire SRS operates properly. Refer to

SRC-13, "SRS Operation

Check"

• Do not disassemble buckle or seat belt assembly.

• Do not reuse seat belt anchor bolts after removal. Replace with new ones.

• Replace anchor bolts if they are deformed or worn out.

• Do not oil tongue and buckle.

• If any component of seat belt assembly is questionable, do not repair. Replace the whole seat belt

assembly.

• If webbing is cut, frayed, or damaged, replace seat belt assembly.

• When replacing seat belt assembly, use a genuine NISSAN seat belt assembly.

SB-6

< REMOVAL AND INSTALLATION >

SEAT BELTS

REMOVAL AND INSTALLATION

SEAT BELTS

Removal and Installation of Front Seat Belt

INFOID:0000000009485357

REMOVAL OF SEAT BELT RETRACTOR

CAUTION:

• Before servicing SRS, turn the ignition switch off, disconnect both battery terminals and wait at least

three minutes.

1. Disconnect the negative and positive battery terminals, then wait at least three minutes. Refer to

PG-72,

"Removal and Installation"

2. Remove the center pillar upper/lower finishers. Refer to

INT-18, "Removal and Installation"

3. Remove anchor cover and seat belt lower anchor bolt.
4. Remove the retractor anchor bolt, retractor bolt upper and the retractor and belt assembly.

• On RH side, disconnect the seat belt tension sensor.

Center pillar upper finisher

D-ring anchor

D-ring anchor bolt cover

Seat belt retractor and belt assembly
(RH)

Seat belt lower anchor
(RH) (seat belt tension
sensor)

Seat belt tension sensor connector

Anchor cover (RH)

Anchor cover (LH)

Seat belt lower anchor (LH)

10. Center pillar lower finisher

11. Seat belt pre-tensioner

connector

12. Seat belt retractor and belt assembly (LH)

13. Center pillar

14. Seat belt height adjuster

Height adjuster anchor bolt

D-ring anchor bolt

Seat belt lower anchor bolt D.

Retractor anchor bolt

Retractor bolt upper

Front

WHIA0344E

Content .. 576 577 578 579 ..