warning INFINITI M35 2007 Factory Service Manual

SB-1
SEAT BELTS
H RESTRAINTS
CONTENTS
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SECTION SB
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SB
Revision: 2007 April2007 M35/M45
SEAT BELTS
PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
Precaution for Seat Belt Service .............................. 2
AFTER A COLLISION ........................................... 2
PRE-CRASH SEAT BELT .......................................... 3
Component Parts and Harness Connector Location ..... 3
System Description .................................................. 3
FUNCTION DESCRIPTION .................................. 4
FAIL-SAFE MODE ................................................ 4
CAN Communication System Description ................ 5
CAN Communication Unit ........................................ 5
Schematic ................................................................ 6
Wiring Diagram — PSB — ....................................... 7
Terminals and Reference Value for Pre-Crash Seat
Belt Control Unit ..................................................... 13
Work Flow .............................................................. 13
CONSULT-II Function (PRECRASH SEATBELT) ... 14
CONSULT-II START PROCEDURE .................... 14
HOW TO READ SELF-DIAGNOSTIC RESULTS ... 14
SELF-DIAGNOSTIC RESULTS ITEM CHART ... 14
DATA MONITOR ITEM CHART .......................... 14
Preliminary Check .................................................. 15
PRE-CRASH SEAT BELT OPERATION
INSPECTION ...................................................... 15
Diagnoses Symptom Chart .................................... 15
Check CAN Communication Circuit [U1000] .......... 15
Check Ignition Power Supply Circuit ...................... 16
Check Motor Power Supply and Ground Circuit
[B2454] ................................................................... 16
Check Seat Belt Buckle Switch (Driver Side) Circuit ... 18
Check Seat Belt Buckle Switch (Passenger Side)
Circuit ..................................................................... 20
Check Brake Pedal Stroke Sensor Circuit [B2453] ... 21
Check Pre-Crash Seat Belt Motor LH Circuit [B2452]
... 24
Check Pre-Crash Seat Belt Motor RH Circuit
[B2451] ................................................................... 26Check Brake Pedal Stroke Sensor Shield Wire Cir-
cuit .......................................................................... 27
Removal and Installation of Pre-Crash Seat Belt
Control Unit ............................................................. 28
REMOVAL ........................................................... 28
INSTALLATION ................................................... 28
SEAT BELTS ............................................................. 29
System Description ................................................. 29
SEAT BELT WARNING CHIME ........................... 29
SEAT BELT WARNING LAMP ............................. 29
Removal and Installation of Front Seat Belt ........... 29
REMOVAL OF SEAT BELT RETRACTOR .......... 29
INSTALLATION OF SEAT BELT RETRACTOR ... 30
REMOVAL OF SEAT BELT BUCKLE .................. 30
INSTALLATION OF SEAT BELT BUCKLE .......... 30
Removal and Installation of Rear Seat Belt ............ 31
REMOVAL OF SEAT BELT RETRACTOR .......... 31
INSTALLATION OF SEAT BELT RETRACTOR ... 31
REMOVAL OF SEAT BELT BUCKLE .................. 31
INSTALLATION OF SEAT BELT BUCKLE .......... 32
Seat Belt Inspection ................................................ 32
AFTER A COLLISION ......................................... 32
PRELIMINARY CHECKS .................................... 32
SEAT BELT RETRACTOR ON-VEHICLE
CHECK ................................................................ 33
SEAT BELT RETRACTOR OFF-VEHICLE
CHECK (FRONT SEAT BELT) ............................ 34
SEAT BELT RETRACTOR OFF-VEHICLE
CHECK (REAR SEAT BELT) ............................... 34
LATCH (LOWER ANCHORS AND TETHER FOR
CHILDREN) SYSTEM ............................................... 35
Removal and Installation ........................................ 35
REMOVAL ........................................................... 35
INSTALLATION ................................................... 35
TOP TETHER STRAP CHILD RESTRAINT ............. 36
Removal and Installation ........................................ 36
REMOVAL ........................................................... 36
INSTALLATION ................................................... 36

SB-2
PRECAUTIONS
Revision: 2007 April2007 M35/M45
PRECAUTIONSPFP: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:

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.

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.

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 ServiceNHS0007W
CAUTION:

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.

Do not use electrical test equipment for front seat belt pre-tensioner connector.

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"
.

Do not use disassemble buckle or seat belt assembly.

Replace anchor bolts if they are deformed or worn out.

Never 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.
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:

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).

The seat belt was damaged in an accident. (i.e. torn webbing, bent retractor or guide).

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.

Anchor bolts are deformed or worn out.

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.

SB-4
PRE-CRASH SEAT BELT
Revision: 2007 April2007 M35/M45
FUNCTION DESCRIPTION
Operation condition
Pre-crash seat belt operates under the following conditions.
Operation prohibition condition
If operation condition is satisfied, pre-crash seat belt does not operate under the following conditions.
*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.
Seat Belt Warning Lamp Illumination Pattern
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.
Condition
When the brake pedal is depressed more than a certain extent

When operation prohibition condition is not satisfied
Condition

When seat belt is not fastened (Only the seat belt that is not fastened does not operate.)

When vehicle is moving backwards

When the vehicle speed is 15 km/h (9 MPH) or less

When pre-crash seat belt continuously operates 3 times or more *1

At fail-safe condition *2
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.
PHIA1142E

PRE-CRASH SEAT BELT
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Preliminary CheckNHS00086
PRE-CRASH SEAT BELT OPERATION INSPECTION
WARNING:

The following tests should be performed in a safe, open place that is free of traffic and obstacles.

The tests should be performed on a dry, paved road. Do not attempt the tests on wet or unpaved
road, open road, or highway. (This may cause an accident or personal injury.)

Driver and passenger assume it will not operate and prepare themselves accordingly.
1. Tighten driver and passenger seat belts.
2. Drive at approximately 25 km/h (16 MPH).
3. Notify passenger of a sudden stop. Driver and passenger prepare themselves for the possibility of
system not operating. Then, driver fully depresses the brake pedal to stop suddenly.
4. Make sure that the shoulder of the seat belt is pulled while braking.
Diagnoses Symptom ChartNHS00087
Check CAN Communication Circuit [U1000]NHS00088
1. CHECK SELF-DIAGNOSTIC RESULT
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
With CONSULT-II
1. Connect CONSULT-II, and turn ignition switch ON.
2. Touch “PRECRASH SEATBELT” on “SELECT SYSTEM”
screen.
3. Touch “SELF-DIAG RESULTS” on “SELECT DIAG MODE”
screen.
4. Check display content in self-diagnostic results.
Displayed U1000?
Ye s > > G O T O LAN-50, "CAN System Specification Chart" .
No >> Inspection END.
Symptom Diagnosis procedureReference
page
All functions of pre-crash seat belt system
does not operate.1. Check ignition power supply circuit SB-16
2. Check motor power supply and ground circuit [B2454]SB-16
3. Check CAN communication circuitSB-15
4. Replace pre-crash seat belt control unitSB-28
Driver side pre-crash seat belt system does
not operate.1. Check seat belt buckle switch (driver side) circuit SB-182. Check pre-crash seat belt motor LH circuit [B2452]SB-24
3. Replace pre-crash seat belt control unitSB-28
Passenger side pre-crash seat belt system
does not operate.1. Check seat belt buckle switch (passenger side) circuit SB-202. Check pre-crash seat belt motor RH circuit [B2451]SB-26
3. Replace pre-crash seat belt control unitSB-28
Pre-crash seat belt system does not operate
during emergency brake operation.1. Check CAN communication circuit [U1000]SB-152. Check brake pedal stroke sensor circuit [B2453]SB-21
3. Check brake pedal stroke sensor shield wire circuit SB-27
4. Replace pre-crash seat belt control unitSB-28
PHIA0772E

SEAT BELTS
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SEAT BELTSPFP:86884
System DescriptionNHS0008I
SEAT BELT WARNING CHIME

With ignition switch turned ON and seat belt unfastened (seat belt switch ON), warning chime will sound
for approximately 6 seconds.

If warning chime does not sound, refer to DI-73, "Seat Belt Buckle Switch Signal Inspection" .
SEAT BELT WARNING LAMP

Fasten driver's seat belt.

The seat belt warning lamp should go out.

If the seat belt warning lamp does not go out, refer to DI-42, "Wiring Diagram — WARN —" .
Removal and Installation of Front Seat Belt NHS0008J
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 outer anchor.

Remove the belt tension sensor cover and cover protector (passenger side only).

Disconnect the belt tension sensor connector (passenger side only).

Remove the fixing bolt of the outer anchor.
1. Outer anchor 2. Shoulder anchor 3. Pre-tensioner seat belt retractor
4. Belt tension sensor cover (passen-
ger side only)5. Cover protector (passenger side
only)6. Belt tension sensor connector (pas-
senger side only)
7. Anchor bolt 8. Anchor nut 9. Seat belt pre-tensioner connector
10. Pre-crash seat belt connector 11. Bolt 12. Seat belt adjuster
PHIA1106E

SB-32
SEAT BELTS
Revision: 2007 April2007 M35/M45
INSTALLATION OF SEAT BELT BUCKLE

Install in the reverse order of removal.

Tighten by specified torque.
Seat Belt InspectionNHS0008L
AFTER A COLLISION
WARNING:
Inspect all seat belt assemblies including retractors and attaching hardware after any collision.
NISSAN / INFINITI recommends that all seat belt assemblies in use during a collision be replaced
unless the collision was minor and the belts show no damage and continue to operate properly. Fail-
ure to do so could result in serious personal injury in an accident. Seat belt assemblies not in use dur-
ing a collision should also be replaced if either damage or improper operation is noted. Seat belt pre-
tensioned 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 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).

The seat belt was damaged in an accident. (i.e. torn webbing, bent retractor or guide, etc.)

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.

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/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 six seconds.
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
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
freely and that webbing lays flat and does not bind in guide. Ensure height adjuster operates properly and
holds securely.
5. 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. 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
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.
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 opening.
3. Pass a thin wire though the though-anchor webbing opening. Hold both ends of the wire and pull it
tantly 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. Tightening torque : 49.0 N·m (5.0 kg-m, 36 ft-lb)

SEAT BELTS
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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.
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.

SC-2
PRECAUTIONS
Revision: 2007 April2007 M35/M45
PRECAUTIONS PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NKS003NB
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:

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.

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.

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.
Precautions for Power Generation Voltage Variable Control SystemNKS003NC
CAUTION:
For this model, the battery current sensor that is installed to the battery cable at the negative terminal
measures the charging/discharging current of the battery, and performs various controls. If the electri-
cal component or the ground wire is connected directly to the battery terminal, the current other than
that being measured with the battery current sensor is charging to or discharging from the battery.
This condition causes the malfunction of the control, and then the battery discharge may occur. Do
not connect the electrical component or the ground wire directly to the battery terminal.

BATTERY
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CHECKING ELECTROLYTE LEVEL
WARNING:
Never allow battery fluid to come in contact with skin, eyes, fabrics, or painted surfaces. After touch-
ing a battery, never touch or rub your eyes until you have thoroughly washed your hands. If acid con-
tacts eyes, skin or clothing, immediately flush with water for 15 minutes and seek medical attention.

Remove the cell plug using a suitable tool.

Add distilled water up to the MAX level.
Sulphation
A battery will be completely discharged if it is left unattended
for a long time and the specific gravity will become less than
1.100. This may result in sulphation on the cell plates.
To determine if a battery has been “sulphated”, note its voltage
and current when charging it. As shown in the figure, less cur-
rent and higher voltage are observed in the initial stage of
charging sulphated batteries.
A sulphated battery may sometimes be brought back into ser-
vice by means of a long, slow charge, 12 hours or more, fol-
lowed by a battery capacity test.
SPECIFIC GRAVITY CHECK
1. Read hydrometer and thermometer indications at eye level.
2. Use the chart below to correct your hydrometer reading accord-
ing to electrolyte temperature.
Hydrometer Temperature Correction
MEL043F
PKIA2353E
MEL042FA
Battery electrolyte temperature °C (°F) Add to specific gravity reading
71 (160) 0.032
66 (150) 0.028
60 (140) 0.024
54 (130) 0.020
49 (120) 0.016
43 (110) 0.012
38 (100) 0.008
32 (90) 0.004
27 (80) 0
21 (70)−0.004

SC-20
CHARGING SYSTEM
Revision: 2007 April2007 M35/M45
CHARGING SYSTEMPFP:23100
System Description NKS005BX
DESCRIPTION
The alternator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged.
The voltage output is controlled by the IC regulator.
Power is supplied at all times

through 10A fuse [No. 36, located in the fuse, fusible link and relay block (J/B)]

to alternator terminal 4 (“S” terminal).
“B” terminal supplies power to charge the battery and operate the vehicle's electrical system. Output voltage is
controlled by the IC regulator at terminal 4 (“S” terminal) detecting the input voltage.
The alternator is grounded to the engine block.
With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No. 14, located in the fuse block (J/B)]

to combination meter terminal 12 for the charge warning lamp.
Ground is supplied at signal

to combination meter terminal 22

through alternator terminal 3 (“L” terminal).
Then power and ground are supplied, the charge warning lamp will illuminate.
When the alternator is providing sufficient voltage with the engine running, the ground is opened and the
charge warning lamp will go off.
If the charge warning lamp illuminates with the engine running, a malfunction is indicated.
Ground is supplied

to alternator terminal 2 (“E” terminal)

through grounds E222, E223 and E224. (VQ35DE)

through ground E212. (VK45DE)
MALFUNCTION INDICATOR
The IC regulator warning function activates to illuminate the charge warning lamp, if any of the following symp-
toms occur while alternator is operating:

Excessive voltage is produced.

No voltage is produced.