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SEAT BELTS


H RESTRAINTS

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                                                                                                   SECTION                    SB
                                                                                                                        SEAT BELTS
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                                                                 CONTENTS
PRECAUTIONS ......................................................... 2 .         [B2451] .................................................................. 27
                                                                                                                                                         .        F
 Precautions for Supplemental Restraint System                                    Brake Pedal Stroke Sensor Shield Wire Circuit
 (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-                                          Check .................................................................... 28
                                                                                                                                                         .
 SIONER" ................................................................. 2
                                                                        .         Removal and Installation of Pre-Crash Seat Belt                                 G
 Precaution for Seat Belt Service ............................. 2       .         Control Unit ............................................................ 29
                                                                                                                                                         .
   AFTER A COLLISION .......................................... 2       .           REMOVAL .......................................................... 29.
PRE-CRASH SEAT BELT ......................................... 3         .           INSTALLATION .................................................. 29   .
                                                                                                                                                                  SB
 Component Parts and Harness Connector Location 3                       .....    SEAT BELTS ............................................................ 30
                                                                                                                                                         .
 System Description ................................................. 3 .         System Description ................................................ 30 .
   FUNCTION DESCRIPTION ................................. 4             .           SEAT BELT WARNING CHIME .......................... 30                .
   FAIL-SAFE MODE ............................................... 4     .           SEAT BELT WARNING LAMP ............................ 30               .         I
 CAN Communication System Description ............... 5                 .         Removal and Installation of Front Seat Belt .......... 30              .
 CAN Communication Unit ....................................... 5       .           REMOVAL OF SEAT BELT RETRACTOR ......... 30                          .
 Schematic ............................................................... 6
                                                                        .           INSTALLATION OF SEAT BELT RETRACTOR... 31                                      J
 Wiring Diagram -- PSB -- ...................................... 7      .           REMOVAL OF SEAT BELT BUCKLE ................. 31                     .
 Terminals and Reference Value for Pre-Crash Seat                                   INSTALLATION OF SEAT BELT BUCKLE ......... 31                        .
 Belt Control Unit .................................................... 13
                                                                        .         Removal and Installation of Rear Seat Belt ........... 32              .
                                                                                                                                                                  K
 Work Flow ............................................................. 13
                                                                        .           REMOVAL OF SEAT BELT RETRACTOR ......... 32                          .
 CONSULT-II Function (PRECRASH SEATBELT)... 14                                      INSTALLATION OF SEAT BELT RETRACTOR... 32
   CONSULT-II INSPECTION PROCEDURE ........ 14                          .           REMOVAL OF SEAT BELT BUCKLE ................. 32                     .
   HOW TO READ SELF-DIAGNOSTIC RESULTS 15                               ...         INSTALLATION OF SEAT BELT BUCKLE ......... 33                        .        L
   SELF-DIAGNOSTIC RESULTS ITEM CHART ... 15                                      Seat Belt Inspection ............................................... 33.
   DATA MONITOR ITEM CHART ......................... 15                 .           AFTER A COLLISION ........................................ 33        .
 Preliminary Check ................................................. 16 .           PRELIMINARY CHECKS ................................... 33            .        M
   PRE-CRASH SEAT BELT OPERATION                                                    SEAT BELT RETRACTOR ON-VEHICLE
   INSPECTION ..................................................... 16  .           CHECK ............................................................... 34
                                                                                                                                                         .
 Diagnoses Symptom Chart ................................... 16         .           SEAT BELT RETRACTOR OFF-VEHICLE
 Check CAN Communication System Inspection                                          CHECK (FRONT SEAT BELT) ........................... 35               .
 [U1000] .................................................................. 16
                                                                        .           SEAT BELT RETRACTOR OFF-VEHICLE
 Ignition Power Supply Circuit Check ..................... 17           .           CHECK (REAR SEAT BELT) .............................. 35             .
 Motor Power Supply and Ground Circuit Check                                     LATCH (LOWER ANCHORS AND TETHER FOR
 [B2454] .................................................................. 17
                                                                        .        CHILDREN) SYSTEM .............................................. 36      .
 Seat Belt Buckle Switch (Driver Side) Circuit Check 19                 ...       Removal and Installation ....................................... 36    .
 Seat Belt Buckle Switch (Passenger Side) Circuit                                   REMOVAL .......................................................... 36.
 Check .................................................................... 21
                                                                        .           INSTALLATION .................................................. 36   .
 Brake Pedal Stroke Sensor Circuit Check [B2453] 22                     ...      TOP TETHER STRAP CHILD RESTRAINT ............ 37                        .
 Pre-Crash Seat Belt Motor LH Circuit Check [B2452]                               Removal and Installation ....................................... 37    .
                                                                        ... 25      REMOVAL .......................................................... 37.
 Pre-Crash Seat Belt Motor RH Circuit Check                                         INSTALLATION .................................................. 37   .



Revision: 2006 January                                                     SB-1                                                           2006 M35/M45
                                              PRECAUTIONS

PRECAUTIONS                                                         PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER"                                                                                           NHS0007V


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                                                                              NHS0007W


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-19, "SRS Operation Check"
   .
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.
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.

Revision: 2006 January                                SB-2                                          2006 M35/M45
                                            PRE-CRASH SEAT BELT

PRE-CRASH SEAT BELT                                                                                                       PFP:98845
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Component Parts and Harness Connector Location                                                                                 NHS0007X




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                                                                                                                        PHIA1123E


                                                                                            Pre-crash seat belt control unit B142          J
                                                 Fuse, fusible link and relay block
    1.   Fuse block (J/B)                   2.                                         3.   (View with the trunk side finisher LH
                                                 (J/B)
                                                                                            removed)
                                                 Pre-crash seat belt motor B32 (LH),
         Brake pedal stroke sensor E125                                                                                                   K
                                                 B8 (RH)                                    Seat belt buckle switch B203 (driver
    4.   (View with the instrument driver   5.                                         6.
                                                 (View with the center pillar lower         seat) B253 (passenger seat)
         lower panel removed)
                                                 garnish removed)
                                                                                                                                          L
System Description                                                                                                             NHS0007Y


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                              M
     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.




Revision: 2006 January                                      SB-3                                                  2006 M35/M45
                                                PRE-CRASH SEAT BELT

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

Operation prohibition condition
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
 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

*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.
*2 : Refer to SB-4, "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
the malfunctioning parts.
Also, seat belt warning lamp blinks with fastening driver seat belt when the following malfunction occurs.
                 Malfunctioning parts                                                    Control contents
 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.
 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.


Seat Belt Warning Lamp Illumination Pattern




                                                                                                                          PHIA1142E

NOTE:
The seat belt warning lamp illumination system shown above operates only when the air bag system does not
turn on the seat belt warning lamp. The air bag system turns on the seat belt warning lamp, depending on the
conditions of passenger being on and the passenger seat belt fastening.




Revision: 2006 January                                           SB-4                                               2006 M35/M45
                                      PRE-CRASH SEAT BELT

CAN Communication System Description                                                                      NHS0007Z

                                                                                                                     A
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           B
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                                                                                    NHS00080
                                                                                                                     C

Refer to LAN-34, "CAN Communication Unit" .
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Revision: 2006 January                              SB-5                                         2006 M35/M45
                         PRE-CRASH SEAT BELT

Schematic                                               NHS00081




                                                  THWT0139E




Revision: 2006 January          SB-6           2006 M35/M45
                           PRE-CRASH SEAT BELT

Wiring Diagram -- PSB --                                  NHS00082

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Revision: 2006 January            SB-7           2006 M35/M45
                         PRE-CRASH SEAT BELT




                                                  THWT0141E




Revision: 2006 January          SB-8           2006 M35/M45
                         PRE-CRASH SEAT BELT


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Revision: 2006 January          SB-9           2006 M35/M45
                         PRE-CRASH SEAT BELT




                                                  THWT0143E




Revision: 2006 January          SB-10          2006 M35/M45
                         PRE-CRASH SEAT BELT


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Revision: 2006 January          SB-11          2006 M35/M45
                         PRE-CRASH SEAT BELT




                                                  THWT0145E




Revision: 2006 January          SB-12          2006 M35/M45
                                             PRE-CRASH SEAT BELT

Terminals and Reference Value for Pre-Crash Seat Belt Control Unit                                                            NHS00083

                                                                                                                                         A
                                                                                                                     Voltage [V]
     Terminal   Wire Color                     Item                                   Condition
                                                                                                                      (Approx.)

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



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