2006 INFINITI M35 ignition

SB-1
SEAT BELTS
H RESTRAINTS
CONTENTS
C
D
E
F
G
I
J
K
L
M
SECTION SB
A
B
SB
Revision: 2006 January2006 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 INSPECTION PROCEDURE ......... 14
HOW TO READ SELF-DIAGNOSTIC RESULTS ... 15
SELF-DIAGNOSTIC RESULTS ITEM CHART ... 15
DATA MONITOR ITEM CHART .......................... 15
Preliminary Check .................................................. 16
PRE-CRASH SEAT BELT OPERATION
INSPECTION ...................................................... 16
Diagnoses Symptom Chart .................................... 16
Check CAN Communication System Inspection
[U1000] ................................................................... 16
Ignition Power Supply Circuit Check ...................... 17
Motor Power Supply and Ground Circuit Check
[B2454] ................................................................... 17
Seat Belt Buckle Switch (Driver Side) Circuit Check ... 19
Seat Belt Buckle Switch (Passenger Side) Circuit
Check ..................................................................... 21
Brake Pedal Stroke Sensor Circuit Check [B2453] ... 22
Pre-Crash Seat Belt Motor LH Circuit Check [B2452]
... 25
Pre-Crash Seat Belt Motor RH Circuit Check [B2451] ................................................................... 27
Brake Pedal Stroke Sensor Shield Wire Circuit
Check ..................................................................... 28
Removal and Installation of Pre-Crash Seat Belt
Control Unit ............................................................. 29
REMOVAL ........................................................
... 29
INSTALLATION ................................................... 29
SEAT BELTS ............................................................. 30
System Description ................................................. 30
SEAT BELT WARNING CHIME ........................... 30
SEAT BELT WARNING LAMP ............................. 30
Removal and Installation of Front Seat Belt ........... 30
REMOVAL OF SEAT BELT RETRACTOR .......... 30
INSTALLATION OF SEAT BELT RETRACTOR ... 31
REMOVAL OF SEAT BELT BUCKLE .................. 31
INSTALLATION OF SEAT BELT BUCKLE .......
... 31
Removal and Installation of Rear Seat Belt ............ 32
REMOVAL OF SEAT BELT RETRACTOR .......... 32
INSTALLATION OF SEAT BELT RETRACTOR ... 32
REMOVAL OF SEAT BELT BUCKLE .................. 32
INSTALLATION OF SEAT BELT BUCKLE .......... 33
Seat Belt Inspection ................................................ 33
AFTER A COLLISION ......................................... 33
PRELIMINARY CHECKS .................................... 33
SEAT BELT RETRACTOR ON-VEHICLE
CHECK ................................................................ 34
SEAT BELT RETRACTOR OFF-VEHICLE
CHECK (FRONT SEAT BELT) ............................ 35
SEAT BELT RETRACTOR OFF-VEHICLE
CHECK (REAR SEAT BELT) ............................... 35
LATCH (LOWER ANCHORS AND TETHER FOR
CHILDREN) SYSTEM ............................................... 36
Removal and Installation ........................................ 36
REMOVAL ........................................................
... 36
INSTALLATION ................................................... 36
TOP TETHER STRAP CHILD RESTRAINT ............. 37
Removal and Installation ........................................ 37
REMOVAL ........................................................
... 37
INSTALLATION ................................................... 37

SB-2
PRECAUTIONS
Revision: 2006 January2006 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.
WAR NING :
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-19, "
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
WAR NING :
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.

PRE-CRASH SEAT BELT
SB-13
C
D
E
F
G
I
J
K
L
MA
B
SB
Revision: 2006 January2006 M35/M45
Terminals and Reference Value for Pre-Crash Seat Belt Control UnitNHS00083
Work FlowNHS00084
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-16, "
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-16,
"Diagnoses Symptom Chart" .
6. Does pre-crash seat belt system operate normally?
OK: GO TO 7.
NG: GO TO 4.
7. INSPECTION END
Terminal Wire Color Item ConditionVoltage [V]
(Approx.)
1G/RSeat belt motor RH release direction
signalSeat belt motor RH operation Battery voltage
Other than above 0
2 W Power source (BAT) – Battery voltage
3G/YSeat belt motor RH fastened direction
signalSeat belt motor RH operation Battery voltage
Other than above 0
4GY/WSeat belt motor LH fastened direction
signalSeat belt motor LH operation Battery voltage
Other than above 0
5 B/Y Ground (Driver circuit) – 0
6L/YSeat belt motor LH release direction
signalSeat belt motor LH operation Battery voltage
Other than above 0
7 G/Y Seat belt indicator signalWhen driver side seat belt is fastened Battery voltage
When driver side seat belt is un-fastened 0
When driver side seat belt is fastened and
system malfunctionBattery
voltage
0
8 LG Seat belt buckle switch RHWhen seat belt is fastened 5
When seat belt is un-fastened 0
10 SB Seat belt buckle switch LHWhen seat belt is fastened Battery voltage
When seat belt is un-fastened 0
13 W/G Power source (IGN) Ignition switch ON or START Battery voltage
16 WBrake pedal stroke sensor output sig-
nal 1Brake pedal is fully released operation 1
Brake pedal is slightly depressed operation 4
18 RPower source (Brake pedal stroke sen-
sor)
–5
20 GBrake pedal stroke sensor output sig-
nal 2Brake pedal is fully released operation 4
Brake pedal is slightly depressed operation 1
21 B Ground (Brake pedal stroke sensor) – 0
22 P CAN-L – -
24 L CAN-H – -
25 – Ground (Shield wire) – 0
26 B/Y Ground (Control circuit) – 0

SB-14
PRE-CRASH SEAT BELT
Revision: 2006 January2006 M35/M45
CONSULT-II Function (PRECRASH SEATBELT)NHS00085
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II INSPECTION PROCEDURE
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.
1. Turn ignition switch “OFF”.
2. Connect “CONSULT-II” and “CONSULT-II CONVERTER” to the
data link connector (1).
3. Turn ignition switch “ON”.
4. Touch “START (NISSAN BASED VHCL)”.
5. Touch “PRECRASH SEATBELT”.
If “PRECRASH SEATBELT” is not indicated, refer to GI-40,
"CONSULT-II Data Link Connector (DLC) Circuit" .
CONSULT-II
diagnosis itemsInspection item
self-diagnosis modeContentReference
page
PRECRASH
SEATBELTSELF–DIAG RESULTS Carries out the self-diagnosis.SB-15
DATA MONITOR Displays pre-crash seat belt control unit input data in real time.SB-15
CAN DIAG SUPPORT MNTRThe results of transmit / receive diagnosis of CAN communication
can be read.LAN-20
ECU PART NUMBER Displays pre-crash seat belt control unit part No. –
PBIB2712E
BCIA0029E
BCIA0030E

SB-16
PRE-CRASH SEAT BELT
Revision: 2006 January2006 M35/M45
Preliminary CheckNHS00086
PRE-CRASH SEAT BELT OPERATION INSPECTION
WAR NING :
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 System Inspection [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?
Yes >> GO TO LAN-7, "Precautions When Using CONSULT-II" .
No >> Inspection END.
Symptom Diagnosis procedureReference
page
All functions of pre-crash seat belt system does not oper-
ate.Ignition power supply circuit checkSB-17
Motor power supply and ground circuit checkSB-17
CAN communication circuit checkSB-16
Replace pre-crash seat belt control unit.SB-29
Driver side pre-crash seat belt system does not operate.Seat belt buckle switch (driver side) circuit checkSB-19Pre-crash seat belt motor LH checkSB-25
Replace pre-crash seat belt control unit.SB-29
Passenger side pre-crash seat belt system does not oper-
ate.Seat belt buckle switch (passenger side) circuit checkSB-21Pre-crash seat belt motor RH checkSB-27
Replace pre-crash seat belt control unit.SB-29
Pre-crash seat belt system does not operate during emer-
gency brake operation.CAN communication circuit checkSB-16Brake pedal stroke sensor circuit checkSB-22
Brake pedal stroke sensor shield wire circuit checkSB-28
Replace pre-crash seat belt control unit.SB-29
PHIA0772E

PRE-CRASH SEAT BELT
SB-17
C
D
E
F
G
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MA
B
SB
Revision: 2006 January2006 M35/M45
Ignition Power Supply Circuit CheckNHS00089
1. CHECK FUSE
Check 10A fuse [No.15, located in fuse block (J/B)].
NOTE:
Refer to SB-3, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to
PG-3, "
POWER SUPPLY ROUTING CIRCUIT" .
2. CHECK IGNITION POWER SUPPLY CIRCUIT
1. Disconnect pre-crash seat belt control unit connector.
2. Turn ignition switch ON.
3. Check voltage between pre-crash seat belt control unit harness
connector and ground.
OK or NG
OK >> Ignition power supply circuit is OK.
NG >> Check pre-crash seat belt control unit ignition power supply circuit harness.
Motor Power Supply and Ground Circuit Check [B2454]NHS0008A
1. CHECK FUSE
Check 30A fusible link (letter G , located in the fuse and fusible link box).
NOTE:
Refer to SB-3, "
Component Parts and Harness Connector Location" .
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to
PG-3, "
POWER SUPPLY ROUTING CIRCUIT" .
Terminal
Voltage (V)
(Approx.) (+)
(–) Pre-crash seat
belt control unit
connectorTerminal
B142 13 Ground Battery voltage
PHIA1126E

PRE-CRASH SEAT BELT
SB-19
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D
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F
G
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K
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MA
B
SB
Revision: 2006 January2006 M35/M45
Seat Belt Buckle Switch (Driver Side) Circuit CheckNHS0008B
1. CHECK PRE-CRASH SEAT BELT CONTROL UNIT INPUT SIGNAL
With CONSULT-II
Select “SB SW LH SIG” on DATA MONITOR screen, and then make sure that ON/OFF display changes syn-
chronized with the insertion operation to the seat belt buckle.
Without CONSULT-II
1. Turn the ignition switch ON.
2. Check voltage between seat belt buckle switch (driver side) har-
ness connector and ground.
OK or NG
OK >> Seat belt buckle switch (driver side) circuit is OK.
NG >> GO TO 2.SB SW LH SIG
When driver seat belt is not fastened : OFF
When driver seat belt is fastened : ON
PHIA0765E
Terminal
ConditionVoltage (V)
(Approx.) (+)
(–) Seat belt buckle
switch connector
(driver side)Te r m i n a l
B203 1 GroundWhen seat belt is
unfastened0
When seat belt is
fastenedBattery
voltage
PHIA1129E

SB-20
PRE-CRASH SEAT BELT
Revision: 2006 January2006 M35/M45
2. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) HARNESS
1. Turn the ignition switch OFF.
2. Disconnect pre-crash seat belt control unit and seat belt buckle switch (driver side) connector.
3. Check continuity between pre-crash seat belt control unit har-
ness connector and seat belt buckle switch (driver side) harness
connector.
4. Check continuity between pre-crash seat belt control unit har-
ness connector and ground.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness.
3. CHECK LH SEAT BELT SWITCH
Check continuity between seat belt buckle switch (driver side) while
performing the insertion operation to the seat belt buckle.
OK or NG
OK >> GO TO 4.
NG >> Replace seat belt buckle switch (driver side).
4. CHECK LH SEAT BELT SWITCH GROUND CIRCUIT HARNNES
Check continuity between seat belt buckle switch (driver side) har-
ness connector and ground.
OK or NG
OK >> Check harness connection.
If it is OK, replace pre-crash seat belt control unit.
If it is NG, repair or replace malfunction part.
NG >> Repair or replace harness.
AB
Continuity Pre-crash seat
belt control unit
connectorTe r m i n a lSeat belt buckle
switch (driver side)
connectorTerminal
B142 10 B203 1 Yes
A
GroundContinuity
Pre-crash seat belt
control unit connectorTerminal
B142 10 No
PHIA1130E
Seat belt buckle
switch connector
(driver side) Terminal Condition Continuity
B203 1 2When seat belt is unfastened Yes
When seat belt is fastened No
PHIA1131E
Te r m i n a l
Continuity
Seat belt buckle switch
connector (driver side) Terminal
Ground
B203 2 Yes
PHIA1132E