Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti M45 M35 Y50 2006-2007 Approved M45_M35-Y50-2007 sb
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SEAT BELTS
H RESTRAINTS
A
SECTION SB
SEAT BELTS
B
C
D
E
CONTENTS
PRECAUTIONS ......................................................... 2 . Check Brake Pedal Stroke Sensor Shield Wire Cir- F
Precautions for Supplemental Restraint System cuit ......................................................................... 27
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Removal and Installation of Pre-Crash Seat Belt
SIONER" ................................................................. 2
. Control Unit ............................................................ 28
. G
Precaution for Seat Belt Service ............................. 2 . REMOVAL .......................................................... 28 .
AFTER A COLLISION .......................................... 2 . INSTALLATION .................................................. 28 .
PRE-CRASH SEAT BELT ......................................... 3 . SEAT BELTS ............................................................ 29 .
SB
Component Parts and Harness Connector Location 3 ..... System Description ................................................ 29 .
System Description ................................................. 3 . SEAT BELT WARNING CHIME .......................... 29 .
FUNCTION DESCRIPTION ................................. 4 . SEAT BELT WARNING LAMP ............................ 29 .
FAIL-SAFE MODE ............................................... 4 . Removal and Installation of Front Seat Belt .......... 29 . I
CAN Communication System Description ............... 5 . REMOVAL OF SEAT BELT RETRACTOR ......... 29 .
CAN Communication Unit ....................................... 5 . INSTALLATION OF SEAT BELT RETRACTOR... 30
Schematic ............................................................... 6
. REMOVAL OF SEAT BELT BUCKLE ................. 30 . J
Wiring Diagram -- PSB -- ...................................... 7 . INSTALLATION OF SEAT BELT BUCKLE ......... 30 .
Terminals and Reference Value for Pre-Crash Seat Removal and Installation of Rear Seat Belt ........... 31 .
Belt Control Unit .................................................... 13. REMOVAL OF SEAT BELT RETRACTOR ......... 31 .
K
Work Flow ............................................................. 13
. INSTALLATION OF SEAT BELT RETRACTOR... 31
CONSULT-II Function (PRECRASH SEATBELT)... 14 REMOVAL OF SEAT BELT BUCKLE ................. 31 .
CONSULT-II START PROCEDURE ................... 14 . INSTALLATION OF SEAT BELT BUCKLE ......... 32 .
HOW TO READ SELF-DIAGNOSTIC RESULTS 14 ... Seat Belt Inspection ............................................... 32 . L
SELF-DIAGNOSTIC RESULTS ITEM CHART ... 14 AFTER A COLLISION ........................................ 32 .
DATA MONITOR ITEM CHART ......................... 14 . PRELIMINARY CHECKS ................................... 32 .
Preliminary Check ................................................. 15 . SEAT BELT RETRACTOR ON-VEHICLE M
PRE-CRASH SEAT BELT OPERATION CHECK ............................................................... 33 .
INSPECTION ..................................................... 15 . SEAT BELT RETRACTOR OFF-VEHICLE
Diagnoses Symptom Chart ................................... 15 . CHECK (FRONT SEAT BELT) ........................... 34 .
Check CAN Communication Circuit [U1000] ......... 15 . SEAT BELT RETRACTOR OFF-VEHICLE
Check Ignition Power Supply Circuit ..................... 16 . CHECK (REAR SEAT BELT) .............................. 34 .
Check Motor Power Supply and Ground Circuit LATCH (LOWER ANCHORS AND TETHER FOR
[B2454] .................................................................. 16
. CHILDREN) SYSTEM .............................................. 35 .
Check Seat Belt Buckle Switch (Driver Side) Circuit 18 ... Removal and Installation ....................................... 35 .
Check Seat Belt Buckle Switch (Passenger Side) REMOVAL .......................................................... 35 .
Circuit .................................................................... 20
. INSTALLATION .................................................. 35 .
Check Brake Pedal Stroke Sensor Circuit [B2453] 21 ... TOP TETHER STRAP CHILD RESTRAINT ............ 36 .
Check Pre-Crash Seat Belt Motor LH Circuit [B2452] Removal and Installation ....................................... 36 .
... 24 REMOVAL .......................................................... 36 .
Check Pre-Crash Seat Belt Motor RH Circuit INSTALLATION .................................................. 36 .
[B2451] .................................................................. 26
.
Revision: 2007 April SB-1 2007 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-20, "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: 2007 April SB-2 2007 M35/M45
PRE-CRASH SEAT BELT
PRE-CRASH SEAT BELT PFP:98845
A
Component Parts and Harness Connector Location NHS0007X
B
C
D
E
F
G
SB
I
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
B422 (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: 2007 April SB-3 2007 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: 2007 April SB-4 2007 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-50, "CAN System Specification Chart" .
D
E
F
G
SB
I
J
K
L
M
Revision: 2007 April SB-5 2007 M35/M45
PRE-CRASH SEAT BELT
Schematic NHS00081
THWT0139E
Revision: 2007 April SB-6 2007 M35/M45
PRE-CRASH SEAT BELT
Wiring Diagram -- PSB -- NHS00082
A
B
C
D
E
F
G
SB
I
J
K
L
M
THWT0140E
Revision: 2007 April SB-7 2007 M35/M45
PRE-CRASH SEAT BELT
THWT0240E
Revision: 2007 April SB-8 2007 M35/M45
PRE-CRASH SEAT BELT
A
B
C
D
E
F
G
SB
I
J
K
L
M
THWT0142E
Revision: 2007 April SB-9 2007 M35/M45
PRE-CRASH SEAT BELT
THWT0241E
Revision: 2007 April SB-10 2007 M35/M45
PRE-CRASH SEAT BELT
A
B
C
D
E
F
G
SB
I
J
K
L
M
THWT0242E
Revision: 2007 April SB-11 2007 M35/M45
PRE-CRASH SEAT BELT
THWT0205E
Revision: 2007 April SB-12 2007 M35/M45
PRE-CRASH SEAT BELT
Terminals and Reference Value for Pre-Crash Seat Belt Control Unit NHS00083
A
Wire Signal Voltage [V]
Terminal Item Condition
Color Input/Output (Approx.)
Seat belt motor RH release Seat belt motor RH operation Battery voltage
1 G/R Output B
direction signal Other than above 0
2 W Power source (BAT) Input -- Battery voltage
Seat belt motor RH fastened Seat belt motor RH operation Battery voltage C
3 G/Y Output
direction signal Other than above 0
Seat belt motor LH fastened Seat belt motor LH operation Battery voltage
4 GY/W Output D
direction signal Other than above 0
5 B/Y Ground (Driver circuit) -- -- 0
Seat belt motor LH release Seat belt motor LH operation Battery voltage E
6 L/Y Output
direction signal Other than above 0
When driver side seat belt is fastened Battery voltage
F
When driver side seat belt is un-fastened 0
7 G/Y Seat belt indicator signal Output
When driver side seat belt is fastened and Battery
system malfunction voltage 0
G
When seat belt is fastened 5
8 LG Seat belt buckle switch RH Input
When seat belt is un-fastened 0
When seat belt is fastened Battery voltage SB
10 SB Seat belt buckle switch LH Input
When seat belt is un-fastened 0
13 W/G Power source (IGN) Input Ignition switch ON or START Battery voltage
I
Brake pedal stroke sensor Brake pedal is fully released operation 1
16 W Output
output signal 1 Brake pedal is slightly depressed operation 4
Power source J
18 R Input -- 5
(Brake pedal stroke sensor)
Brake pedal stroke sensor Brake pedal is fully released operation 4
20 G Output
output signal 2 Brake pedal is slightly depressed operation 1 K
Ground
21 B -- -- 0
(Brake pedal stroke sensor)
22 P CAN-L Input/Output -- -- L
24 L CAN-H Input/Output -- --
25 -- Ground (Shield wire) -- -- 0
M
26 B/Y Ground (Control circuit) -- -- 0
Work Flow NHS00084
1. Check the symptom and customer's requests.
2. Understand the system description. Refer to SB-3, "System Description" .
3. Perform the preliminary check. Refer to SB-15, "Preliminary Check" .
4. Check the self-diagnosis, results using CONSULT-II. Refer to SB-14, "CONSULT-II Function (PRECRASH
SEATBELT)" .
5. Based on the trouble diagnosis chart, repair or replace the cause of the malfunction. Refer to SB-15,
"Diagnoses Symptom Chart" .
6. Does pre-crash seat belt system operate normally?
OK: GO TO 7.
NG: GO TO 4.
7. INSPECTION END
Revision: 2007 April SB-13 2007 M35/M45
PRE-CRASH SEAT BELT
CONSULT-II Function (PRECRASH SEATBELT) NHS00085
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II Inspection item Reference
Content
diagnosis items self-diagnosis mode page
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