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SEAT BELTS

H RESTRAINTS

SECTION SB
SEAT BELTS
B

E
CONTENTS
PRECAUTIONS ......................................................... 2
. PRE-CRASH SEAT BELT ........................................ 12 . F
Precautions for Supplemental Restraint System Component Parts and Harness Connector Location 12 ...
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- System Description ................................................ 12 .
SIONER" ................................................................. 2
. FUNCTION DESCRIPTION ............................... 13 . G
Precaution for Seat Belt Service ............................. 2 . FAIL-SAFE MODE .............................................. 13 .
AFTER A COLLISION .......................................... 2 . CAN Communication System Description ............. 14 .
SEAT BELTS ............................................................. 4
. CAN Communication Unit ...................................... 14 .
SB
System Description ................................................. 4
. Schematic .............................................................. 15
.
SEAT BELT WARNING CHIME ........................... 4 . Wiring Diagram -- PSB -- .................................... 16 .
SEAT BELT WARNING LAMP ............................. 4 . Terminals and reference value for Pre-Crash Seat
Removal and Installation of Front Seat Belt ............ 4 . Belt Control Unit .................................................... 22
. I
REMOVAL OF SEAT BELT RETRACTOR ........... 4 . Work Flow .............................................................. 22
.
INSTALLATION OF SEAT BELT RETRACTOR..... 5 CONSULT-II Function ............................................ 23 .
REMOVAL OF SEAT BELT BUCKLE ................... 5 . CONSULT-II INSPECTION PROCEDURE ......... 23 . J
INSTALLATION OF SEAT BELT BUCKLE ........... 5 . SELF-DIAGNOSIS RESULTS ............................ 24 .
Removal and Installation of Rear Seat Belt ............ 6 . DATA MONITOR ................................................ 24 .
REMOVAL ............................................................ 6
. Preliminary Check ................................................. 24 .
K
INSTALLATION .................................................... 6
. PRE- CRASH SEAT BELT OPERATION
Seat Belt Inspection ................................................ 7
. INSPECTION ..................................................... 24 .
AFTER A COLLISION .......................................... 7 . Diagnoses Symptom Chart .................................... 25 .
PRELIMINARY CHECKS ..................................... 7 . Check CAN Communication System Inspection L
SEAT BELT RETRACTOR ON-VEHICLE [U1000] .................................................................. 25
.
CHECK ................................................................. 8
. Ignition Power Supply Circuit Check ..................... 25 .
SEAT BELT RETRACTOR OFF-VEHICLE Motor Power Supply and Ground Circuit Check M
CHECK ................................................................. 9
. [B2454] .................................................................. 26
.
LATCH (LOWER ANCHORS AND TETHER FOR Seat Belt Buckle Switch (Driver Side) Circuit Check 28 ...
CHILDREN) SYSTEM .............................................. 10 . Seat Belt Buckle Switch (Passenger Side) Circuit
Removal and Installation ....................................... 10 . Check .................................................................... 29
.
REMOVAL .......................................................... 10
. Brake Pedal Stroke Sensor Circuit Check [B2453] 31 ...
INSTALLATION .................................................. 10. Pre-crash Seat Belt Motor LH Circuit Check [B2452] 33 ...
TOP TETHER STRAP CHILD RESTRAINT .............11 . Pre-crash Seat Belt Motor RH Circuit Check [B2451]
Removal and Installation ........................................11 . ... 34
REMOVAL ...........................................................11
. Brake Pedal Stroke Sensor Shield Wire Circuit
INSTALLATION ...................................................11. Check .................................................................... 35
.

Edition; 2004 May SB-1 2005 Q45
PRECAUTIONS

PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EHS000M7

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 SRS and SB section of this Service Man-
ual.
WARNING:
q 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 per-
formed by an authorized NISSAN/INFINITI dealer.
q Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
q 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
harness connectors.
Precaution for Seat Belt Service EHS001NP

CAUTION:
q Before removing the front seat belt pre-tensioner assembly, turn the ignition switch off, discon-
nect the both battery cables and wait at least 3 minutes.
q Do not use electrical test equipment for front seat belt pre-tensioner connector.
q After replacing or reinstalling front seat belt pre-tensioner assembly, or reconnecting front seat
belt pre-tensioner connector, check the system function. Refer to SRS-20, "SRS Operation Check"
.
q Deploy front seat belt pre-tensioner assembly before disposing. Refer to SRS-52, "DISPOSAL OF
AIR BAG MODULE AND SEAT BELT PRE-TENSIONER" .
q Do not use disassemble buckle or seat belt assembly.
q Replace anchor bolts if they are deformed or worn out.
q Never oil tongue and buckle.
q If any component of seat belt assembly is questionable, do not repair. Replace the whole seat belt
assembly.
q If webbing is cut, frayed, or damaged, replace seat belt assembly.
q When replacing seat belt assembly, use a genuine NISSAN seat belt assembly.
AFTER A COLLISION
WARNING:
Inspect all seat belt assemblies including retractors and attaching hardware after any collision.
NISSAN recommends that all seat belt assemblies in use during a collision be replaced unless the col-
lision was minor and the belts show no damage and continue to operate properly. Failure to do so
could result in serious personal injury in an accident. Seat belt assemblies not in use during a colli-
sion should also be replaced if either damage or improper operation is noted. Seat belt pre-tensioner
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:
q The seat belt was 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 properly).
q The seat belt was damaged in an accident. (i.e. torn webbing, bent retractor or guide).
q The seat belt attaching point was 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.
q Anchor bolts are deformed or worn out.

Edition; 2004 May SB-2 2005 Q45
PRECAUTIONS

q The front seat belt pre-tensioner should be replaced even if the seat belts are not in use during the colli-
sion in which the air bags are deployed. A

Edition; 2004 May SB-3 2005 Q45
SEAT BELTS

SEAT BELTS PFP:86884

System Description EHS001NQ

SEAT BELT WARNING CHIME
q With ignition switch turned ON and seat belt unfastened (seat belt switch ON), warning chime will sound
for approximately 6 seconds.
q If warning chime does not sound, refer to DI-71, "Seat Belt Buckle Switch Input Signal Inspection" .
SEAT BELT WARNING LAMP
q Fasten driver's seat belt.
q The seat belt warning lamp should go out.
q If the seat belt warning lamp does not go out, refer to DI-35, "Wiring Diagram -- WARN --" .
Removal and Installation of Front Seat Belt EHS00085

PHIA0686E

CAUTION:
Before servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least 3
minutes.
REMOVAL OF SEAT BELT RETRACTOR
1. Remove the adjuster cover on the seat belt anchor.
NOTE:
Insert a screwdriver wound with cloth into the slot of the release
button to disengage the tab and remove the release button.

SHIA0166E

2. Remove the anchor bolts.
3. Remove the outer anchor cover, and remove the anchor bolts.
4. Remove the center pillar upper and lower garnish. Refer to EI-42, "Removal and Installation" .

Edition; 2004 May SB-4 2005 Q45
SEAT BELTS

5. Disconnect the seat belt pre-tensioner connector.
CAUTION: A
q For installing/removing seat belt pre-tensioner connec-
tor, insert thin screwdriver wrapped in tape into notch, lift
lock and remove connector. B
q Install connector with lock raised, and push lock into
connector.
C

PHIA0341E

D
6. Disconnect the tension reducer connector and the pre-crush
seat belt connector.
7. Remove the seat belt pre-tensioner retractor fixing screw and E
anchor bolt, and then remove the seat belt retractor.

G
PHIA0773E

INSTALLATION OF SEAT BELT RETRACTOR
Install in the reverse order of removal. SB

REMOVAL OF SEAT BELT BUCKLE
1. Remove the front seat. Refer to SE-186, "Removal and Installation" . I
2. Remove the anchor bolt, and remove the buckle.

L
SHIA0168E

INSTALLATION OF SEAT BELT BUCKLE
Install in the reverse order of removal. M

Edition; 2004 May SB-5 2005 Q45
SEAT BELTS

Removal and Installation of Rear Seat Belt EHS00086

SHIA0169E

REMOVAL
1. Remove the rear seat. Refer to SE-195, "Removal and Installation" .
2. Remove the rear pillar finisher. Refer to EI-42, "Removal and Installation" .
3. Remove the outer and inner anchor bolt.
4. Remove the rear parcel shelf finisher. Refer to EI-47, "Removal and Installation" .
5. Remove seat belt retractor mounting screw and anchor bolt, and remove the seat belt assembly.
INSTALLATION
Install in the reverse order of removal.

Edition; 2004 May SB-6 2005 Q45
SEAT BELTS

Seat Belt Inspection EHS00087

AFTER A COLLISION A
WARNING:
Inspect all seat belt assemblies including retractors and attaching hardware after any collision.
NISSAN recommends that all seat belt assemblies in use during a collision be replaced unless the col- B
lision was minor and the belts show no damage and continue to operate properly. Failure to do so
could result in serious personal injury in an accident. Seat belt assemblies not in use during a colli-
sion should also be replaced if either damage or improper operation is noted. Seat belt pre-tensioned
C
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:
q The seat belt was in use at the time of a collision (except for minor collisions and the belts, retractors and D
buckles show no damage and continue to operate properly).
q The seat belt was damaged in an accident. (i.e. torn webbing, bent retractor or guide, etc.)
q The seat belt attaching point was damaged in an accident. Inspect the seat belt attaching area for damage E
or distortion and repair as necessary before installing a new seat belt assembly.
q Anchor bolts are deformed or worn out.
q The seat belt pre-tensioner should be replaced even if the seat belts are not in use during the collision in F
which the air bags are deployed.
PRELIMINARY CHECKS G
1. Check the seat belt warning lamp/chime for proper operation as follows:
a. Switch ignition ON. The seat belt warning lamp should illuminate. Also, the seat belt warning chime should
sound for about seven seconds.
SB
b. Fasten driver's seat belt. The seat belt warning lamp should go out and the chime (if sounding) should
stop.
2. If the air bag warning lamp is blinking, conduct self-diagnosis using CONSULT-II, and air bag warning I
lamp. Refer to SRS-20, "SRS Operation Check" .
3. Check that the seat belt retractor, seat belt anchor and buckle bolts are securely attached.
4. Check the shoulder seat belt guide and shoulder belt height adjuster for front seats. Ensure guide swivels J
freely and that webbing lays flat and does not bind in guide. Ensure height adjuster operates properly and
holds securely.
5. Check retractor operation:
K
a. Fully extend the seat belt webbing and check for twists, tears or other damage.
b. Allow the seat belt to retract. Ensure 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. Because dirt L
built up in the loops of the upper anchors can cause the seat belts to retract slowly.
c. Fasten the seat belt. Check the 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. M
Inspect the front seat belt though-anchor
1. Pull the seat belt out to a length of 500 mm (19.69 in) or more.
2. Use a clip or other device to the fix the seat belt at the center pillar webbing oping.
3. Pass a thin wire though the though-anchor webbing opening. Hold both ends of the wire and pull taut
while moving it up and down several times along the webbing opening surface to move matter stuck
there.
4. Any dirt that can not 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 though-anchor webbing opening.
NOTE:
Apply the tape so that there is no looseness or wrinkling.
6. Remove the clip fixing the seat belt and check that the webbing returns smoothly.
6. Repeat steps above as necessary to check the other seat belts.

Edition; 2004 May SB-7 2005 Q45
SEAT BELTS

SEAT BELT RETRACTOR ON-VEHICLE CHECK
Emergency Locking Retractors (ELR) and Automatic Locking Retractors (ALR)
NOTE:
All seat belt retractors are of the 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's 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 using 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 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
NG, 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 the
retractor does not lock.
1. Fasten driver's 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 the retractor does not
lock, apply brakes firmly and make a very hard stop.
During stop, seat belts should lock and not be extended. If the seat belt retractor assembly does not lock, per-
form the retractor off-vehicle check.

Edition; 2004 May SB-8 2005 Q45
SEAT BELTS

SEAT BELT RETRACTOR OFF-VEHICLE CHECK
1. Remove the seat belt retractor assembly. A
2. Slowly pull out webbing while tilting the retractor assembly forward from the mounted position without
twisting the retractor assembly as shown in the illustration.
B

PHIA0730E

15 degrees or less tilt : Webbing can be pulled out. SB
35 degrees or more tilt : Webbing locks and cannot be pulled out.
If NG, replace the retractor assembly.
I

Edition; 2004 May SB-9 2005 Q45
LATCH (LOWER ANCHORS AND TETHER FOR CHILDREN) SYSTEM

LATCH (LOWER ANCHORS AND TETHER FOR CHILDREN) SYSTEM PFP:75466

Removal and Installation EHS00088

CAUTION:
Replace anchor bolts if they are deformed or worn out.
REMOVAL
1. Remove the rear seat. Refer to SE-195, "Removal and Installa-
tion" .
2. Remove rear seat frame (Models with rear power seat).
3. Remove LATCH (Lower Anchor and Tether for Children) system.

SHIA0163E

INSTALLATION
Install in the reverse order of removal.

Edition; 2004 May SB-10 2005 Q45
TOP TETHER STRAP CHILD RESTRAINT

TOP TETHER STRAP CHILD RESTRAINT PFP:88000
A
Removal and Installation EHS00089

CAUTION:
Replace anchor bolts if they are deformed or worn out. B
REMOVAL
1. Remove the top tether strap child restraint cover. Refer to EI-47,
"Removal and Installation" . C
2. Remove the top tether strap child restraint.

SHIA0164E
F
INSTALLATION
Install in the reverse order of removal.
G

Edition; 2004 May SB-11 2005 Q45
PRE-CRASH SEAT BELT

PRE-CRASH SEAT BELT PFP:98845

Component Parts and Harness Connector Location EHS001PT

PHIA0761E

System Description EHS001PU

q Pre-crash seat belt system is adapted to front seat belts RH/LH.
q When the pre-crash seat belt control unit judges the emergency braking operation, it gives the sense of
security by the motor built into the pre-crash seat belt retracting the shoulder belt and suppressing the
crew's posture change. Also, it eases the damage of the collision.

Edition; 2004 May SB-12 2005 Q45
PRE-CRASH SEAT BELT

FUNCTION DESCRIPTION
Operation condition A
Pre-crash seat belt operates under the following conditions.
q When the brake pedal is depressed more than a certain extent B
Condition
q When operation prohibition condition is not satisfied

Operation prohibition condition
C
If operation condition is satisfied, pre-crash seat belt does not operate under the following conditions.
q When seat belt is not fastened (Only the seat belt that is not fastened does not operate.)
q When vehicle is moving backwards D
Condition q When the vehicle speed is 15 km/h (9 MPH) or less
q When pre-crash seat belt continuously operates 3 times or more *1
q At fail-safe condition *2 E

*1 :When pre-crash seat belt doesn't operate after it continuously operates 3 times or more, operation can be performed again by stop-
ping operation for approximately 7 minutes.
F
*2 : Refer to SB-13, "FAIL-SAFE MODE" for details of fail-safe mode.

FAIL-SAFE MODE
When a malfunction occurs in the following system, the pre-crash seat belt function is controlled according to G
the malfunctioning parts.
Also, seat belt warning lamp blinks with fastening driver seat belt when the following malfunction occurs.
Malfunctioning parts Control contents SB
Brake pedal stroke sensor system malfunction Pre-crash seat belt RH/LH do not activate when emergency brake operates.
Seat belt motor RH malfunction Pre-crash seat belt RH does not activate.
I
Seat belt motor LH malfunction Pre-crash seat belt LH does not activate.
Motor power supply circuit malfunction Pre-crash seat belt RH/LH do not activate.
J
Seat Belt Warning Lamp Illumination Pattern

PHIA0790E

Edition; 2004 May SB-13 2005 Q45
PRE-CRASH SEAT BELT

CAN Communication System Description EHS001R6

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Unit EHS001R7

Refer to LAN-36, "CAN Communication Unit" .

Edition; 2004 May SB-14 2005 Q45
PRE-CRASH SEAT BELT

Schematic EHS001PV

THWM0063E

Edition; 2004 May SB-15 2005 Q45
PRE-CRASH SEAT BELT

Wiring Diagram -- PSB -- EHS001PW

THWM0064E

Edition; 2004 May SB-16 2005 Q45
PRE-CRASH SEAT BELT

THWM0065E

Edition; 2004 May SB-17 2005 Q45
PRE-CRASH SEAT BELT

THWM0066E

Edition; 2004 May SB-18 2005 Q45
PRE-CRASH SEAT BELT

THWM0067E

Edition; 2004 May SB-19 2005 Q45
PRE-CRASH SEAT BELT

THWM0068E

Edition; 2004 May SB-20 2005 Q45
PRE-CRASH SEAT BELT

THWM0069E

Edition; 2004 May SB-21 2005 Q45
PRE-CRASH SEAT BELT

Terminals and reference value for Pre-Crash Seat Belt Control Unit EHS001PX

TERMI- WIRE VOLTAGE [V]
ITEM CONDITION
NAL COLOR (Approx.)

Seat belt motor RH release direction Seat belt motor RH operation Battery voltage
1 G/R
signal Other than above 0
2 G/R Power source (Driver circuit)

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