seat INFINITI M35 2007 Factory Service Manual

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
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SRS
Revision: 2007 April2007 M35/M45
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)PFP:28556
SRS ConfigurationNHS0008S
The air bag deploys if the diagnosis sensor unit activates while the ignition switch is in the ON or START posi-
tion.
The collision modes for which supplemental restraint systems are activated are different among the SRS sys-
tems. For example, the driver air bag module and front passenger air bag module are activated in a frontal col-
lision but not in a side collision.
SRS configurations which are activated for some collision modes are as follows;
PHIA1120E
SRS configuration Frontal collision Left side collision Right side collision
Driver air bag module×——
Front passenger air bag module×——
Front LH seat belt pre-tensioner×——
Front RH seat belt pre-tensioner×——
Front LH side air bag module —×—
Front RH side air bag module — —×
LH side curtain air bag module —×—
RH side curtain air bag module — —×

SRS-6
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Revision: 2007 April2007 M35/M45
Front Seat Belt Pre-Tensioner with Load LimiterNHS0008T
The seat belt pre-tensioner system with load limiter is installed for
both the driver's seat and the front passenger's seat. It operates
simultaneously with the SRS air bag system in the event of a frontal
collision with an impact exceeding a specified level.
When the frontal collision with an impact exceeding a specified level
occurs, seat belt slack resulting from clothing or other factors is
immediately taken up by the pre-tensioner. Vehicle passengers are
securely restrained.
When passengers in a vehicle are thrown forward in a collision and
the restraining force of the seat belt exceeds a specified level, the
load limiter permits the specified extension of the seat belt by the
twisting of the ELR shaft, and a relaxation of the chest-area seat belt
web tension while maintaining force.
Front Side Air BagNHS0008U
Front side air bag is built-in type.
The front seatback with built-in type side air bag have the labels as
shown.
Side Curtain Air BagNHS0008V
The side curtain air bags have the labels as shown.
SRS444
SHIA0170E
BF-2006D

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
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Occupant Classification System (OCS) NHS0008W
The occupant classification system identifies different size occupants, out of position occupants, and detects if
child seat is present in the front passenger seat. The occupant classification system receives inputs from the
occupant classification sensor (located inside the passenger seat cushion assembly) and belt tension sensor
(part of the passenger front seat belt assembly and located at the belt anchor location). Depending on classifi-
cation of passenger, the occupant classification system sends a signal to the diagnosis sensor unit. The diag-
nosis sensor unit uses this signal to determine full, partial, or non deployment of passenger front air bag in the
event of a collision. Depending on the signal received, the diagnosis sensor unit can disable the passenger
front air bag completely.
NOTE:
In case of customer concern, CONSULT-ll can be used to confirm the passenger air bag status (readiness).
Passenger Air Bag Status Condition NHS0008X
NOTE:
Passenger does not meet Ocuupant Classification System specifications for passenger air bag activation.
Component Parts of Occupant Classification System NHS0008Y
Front Passenger Seat
(Condition)PASS AIR BAG OFF Indicator
(Status)Passenger Air Bag Status
(Readiness)CONSULT-ll Display
Seat occupied OFF Active (enabled) ON
seat occupiedNOTE ON Deactivated (disabled) OFF
Seat empty OFF Deactivated (disabled) OFF
PHIA1177E
1.Occupant classification system con-
trol unit2. Belt tension sensor 3. Seat pressure sensor
4. Bladder 5.Front passenger air bag OFF indica-
tor (Cutoff telltaile)

SRS-8
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
Revision: 2007 April2007 M35/M45
Passenger Seatbelt Warning System NHS0009R
SYSTEM DESCRIPTION
This system warns when passenger seatbelt is not fasten.
This system is composed of the following items.

Seatbelt warning lamp.

Seatbelt buckle switch (passenger side).

Air bag diagnosis sensor unit.

Occupant classification system.
Seatbelt warning lamp is used for both driver seatbelt warning and passenger seatbelt warning.
Seatbelt warning lamp turns ON when all conditions below are met.

Driver seatbelt is fastened.

Occupant is on passenger seat.

Passenger seatbelt is not fasten.

TROUBLE DIAGNOSIS
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Component Parts LocationNHS00091
*: The bottom of front passenger seat
P H I A 111 0 E
1. Front passenger air bag module 2. Driver air bag module 3. Spiral cable
4. Diagnosis sensor unit 5. Side air bag (Satellite) sensor (RH/LH) 6. Front seat belt pre-tensioner (RH/LH)
7. Seat belt buckle switch (RH/LH) 8. Front side air bag modules 9. Side curtain air bag module
10. Crash zone sensor 11. Belt tension sensor 12. Belt tension sensor connector *
13. Seat pressure sensor * 14. Occupant classification system control unit *

TROUBLE DIAGNOSIS
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Warning lamp examples
“AIR BAG” warning lamp operation — User mode
—SRS condition Reference item

No malfunction is detected.

No further action is necessary.—

The system is malfunctioning and
needs to be repaired as indicated.Go to SRS-22, "DIAGNOSTIC
PROCEDURE 2" or SRS-29,
"DIAGNOSTIC PROCEDURE 5" .

Air bag is deployed.

Seat belt pre-tensioner is deployed.Go to SRS-54, "
COLLISION DIAG-
NOSIS" .

Diagnosis sensor unit is malfunction-
ing.

Air bag power supply circuit is mal-
functioning.

SRS air bag warning lamp circuit is
malfunctioning.Go to SRS-39, "
Trouble Diagnosis:
“AIR BAG” Warning Lamp Does Not
Turn OFF" .

Diagnosis sensor unit is malfunction-
ing.

Air bag warning lamp circuit is mal-
functioning.Go to SRS-40, "
Trouble Diagnosis:
“AIR BAG” Warning Lamp Does Not
Turn ON" .
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E

TROUBLE DIAGNOSIS
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DRIVER AIRBAG
MODULE
[OPEN]
[B1049] [B1054]
Driver air bag module circuit is open (including the spiral cable). 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the driver air bag module. .)
4. Replace the spiral cable.
5. Replace the diagnosis sensor unit.
6. Replace the related harness. DRIVER AIRBAG
MODULE
[VB-SHORT]
[B1050] [B1055]

Driver air bag module circuit is shorted to a power supply circuit
(including the spiral cable).
DRIVER AIRBAG
MODULE
[GND-SHORT]
[B1051] [B1056]

Driver air bag module circuit is shorted to ground (including the
spiral cable).
DRIVER AIRBAG
MODULE
[SHORT]
[B1052] [B1057]

Driver air bag module circuit is shorted between lines.
ASSIST A/B MODULE
[OPEN]
[B1065] [B1070]

Front passenger air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the front passenger air bag
module.
4. Replace the diagnosis sensor unit.
5. Replace the related harness. ASSIST A/B MODULE
[VB-SHORT]
[B1066] [B1071]

Front passenger air bag module circuit is shorted to a power
supply circuit.
ASSIST A/B MODULE
[GND-SHORT]
[B1067] [B1072]

Front passenger air bag module circuit is shorted to ground.
ASSIST A/B MODULE
[SHORT]
[B1068] [B1073]

Front passenger air bag module circuit is shorted between lines.
CRASH ZONE SEN
[UNIT FAIL]
[B1033]
[B1034]
CRASH ZONE SEN
[COMM FAIL]
[B1035]
CRASH ZONE SEN
[UNMATCH]
[B1036]

Crash zone sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the crash zone sensor.
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
SIDE MODULE LH
[OPEN]
[B1134]

Front LH side air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the front LH seatback
assembly (front LH side air bag
module).
4. Replace the diagnosis sensor unit.
5. Replace the related harness. SIDE MODULE LH
[VB-SHORT]
[B1135]

Front LH side air bag module circuit is shorted to a power sup-
ply circuit.
SIDE MODULE LH
[GND-SHORT]
[B1136]

Front LH side air bag module circuit is shorted to ground.
SIDE MODULE LH
[SHORT]
[B1137]

Front LH side air bag module circuit is shorted between lines. Diagnostic item ExplanationRepair order
“Recheck SRS at each replacement”

SRS-24
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
SIDE MODULE RH
[OPEN]
[B1129]
Front RH side air bag module circuit is open. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the front RH seatback
assembly (front RH side air bag
module).
4. Replace the diagnosis sensor unit.
5. Replace the related harness. SIDE MODULE RH
[VB-SHORT]
[B1130]

Front RH side air bag module circuit is shorted to a power sup-
ply circuit.
SIDE MODULE RH
[GND-SHORT]
[B1131]

Front RH side air bag module circuit is shorted to ground.
SIDE MODULE RH
[SHORT]
[B1132]

Front RH side air bag module circuit is shorted between lines.
SATELLITE SENS LH
[UNIT FAIL]
[ B 111 8 ]
[ B 111 9 ]
SATELLITE SENS LH
[COMM FAIL]
[B1120]
SATELLITE SENS LH
[UNMATCH]
[B1121]

LH side air bag (Satellite) sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the LH side air bag (Satel-
lite) sensor.
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
SATELLITE SENS RH
[UNIT FAIL]
[ B 111 3 ]
[ B 111 4 ]
SATELLITE SENS RH
[COMM FAIL]
[ B 111 5 ]
SATELLITE SENS RH
[UNMATCH]
[ B 111 6 ]

RH side air bag (Satellite) sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the RH side air bag (Satel-
lite) sensor.
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
PRE-TEN FRONT LH
[OPEN]
[B1086]

Front LH pre-tensioner circuit is open.
1. Visually check the wiring harness
connections.
2. Replace the harness if it has visible
damage.
3. Replace the front LH seat belt.
4. Replace the diagnosis sensor unit.
5. Replace the related harness. PRE-TEN FRONT LH
[VB-SHORT]
[B1087]

Front LH pre-tensioner circuit is shorted to a power supply cir-
cuit.
PRE-TEN FRONT LH
[GND-SHORT]
[B1088]

Front LH pre-tensioner circuit is shorted to ground.
PRE-TEN FRONT LH
[SHORT]
[B1089]

Front LH pre-tensioner circuit is shorted between lines.
PRE-TEN FRONT RH
[OPEN]
[B1081]

Front RH pre-tensioner circuit is open.
1. Visually check the wiring harness
connections.
2. Replace the harness if it has visible
damage.
3. Replace the front RH seat belt.
4. Replace the diagnosis sensor unit.
5. Replace the related harness. PRE-TEN FRONT RH
[VB-SHORT]
[B1082]

Front RH pre-tensioner circuit is shorted to a power supply cir-
cuit.
PRE-TEN FRONT RH
[GND-SHORT]
[B1083]

Front RH pre-tensioner circuit is shorted to ground.
PRE-TEN FRONT RH
[SHORT]
[B1084]

Front RH pre-tensioner circuit is shorted between lines. Diagnostic item ExplanationRepair order
“Recheck SRS at each replacement”

TROUBLE DIAGNOSIS
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CURTAIN MODULE LH
[OPEN]
[B1150]
LH side curtain air bag module circuit is open.
1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the LH side curtain air bag
module.
4. Replace the diagnosis sensor unit.
5. Replace the related harness. CURTAIN MODULE LH
[VB-SHORT]
[B1151]

LH side curtain air bag module circuit is shorted to some power
supply circuits.
CURTAIN MODULE LH
[GND-SHORT]
[B1152]

LH side curtain air bag module circuit is shorted to ground.
CURTAIN MODULE LH
[SHORT]
[B1153]

LH side curtain air bag module circuit is shorted between lines.
CURTAIN MODULE RH
[OPEN]
[B1145]

RH side curtain air bag module circuit is open.
1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace the RH side curtain air bag
module.
4. Replace the diagnosis sensor unit.
5. Replace the related harness. CURTAIN MODULE RH
[VB-SHORT]
[B1146]

RH side curtain air bag module circuit is shorted to a power sup-
ply circuit.
CURTAIN MODULE RH
[GND-SHORT]
[B1147]

RH side curtain air bag module circuit is shorted to ground.
CURTAIN MODULE RH
[SHORT]
[B1148]

RH side curtain air bag module circuit is shorted between lines.
CONTROL UNIT
[B1001-B1015]
[B1026-B1031]
[B1042-B1047]
[B1058-B1063]
[B1074-B1079]
[ B 11 0 6 - B 1111 ]
[B1122-B1127]
[B1138-B1143]
[B1202-B1207]

Diagnosis sensor unit is malfunctioning. 1. Visually check the wiring harness
connection.
2. Replace the diagnosis sensor unit.
OCCUPANT SENS C/U
[UNIT FAIL]
[B1017]
[B1020]
[B1021]

Occupant classification system control unit is malfunctioning. 1. Visuary check the wiring harness
connection.
2. Replace front passenger seat cush-
ion/occupant classification system
control unit assembly.
OCCUPANT SENS C/U
[COMM FAIL]
[B1022]

Communication between the occupant classification system
control unit and air bag diagnosis sensor unit is interrupted, or
occupant classification system control unit is malfunctioning.1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace front passenger seat cush-
ion/occupant classification system
control unit assembly.
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
OCCUPANT SENS
[UNIT FAIL]
[B1018]

Occupant classification sensor is malfunctioning.
Replace front passenger seat cush-
ion/occupant classification system
control unit assembly. Diagnostic item ExplanationRepair order
“Recheck SRS at each replacement”

SRS-26
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
NOTE:
Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is
eliminated using air bag warning lamp or CONSULT-II each time repair is finished. If malfunction is still
observed, proceed to the next step. When malfunction is eliminated, further repair work is not required.
BELT TENSION SENS
[UNIT FAIL]
[B1019]
Belt tension sensor circuit between belt tension sensor and
occupant classification system control unit, or diagnosis sensor
unit is malfunctioning.1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace front seat belt (passenger
side) assembly.
4. Replace front passenger seat cush-
ion/occupant classification system
control unit assembly.
PASS A/B INDCTR
CKT
[B1023]

Front passenger air bag off indicator or related circuit is mal-
functioning.1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible
damage.
3. Replace front passenger air bag off
indicator (The installation position is
an overhead consoul).
4. Replace the diagnosis sensor unit.
5. Replace the related harness.
FRONTAL COLLISION
DETECTION
[B1209]

Seat belt pre-tensioner and front air bag are deployed.
Go to SRS-54, "For Frontal Colli-
sion" .
SIDE COLLISION
DETECTION
[B1210]

Side and curtain air bag is deployed.
Go to SRS-56, "For Side Collision" . Diagnostic item ExplanationRepair order
“Recheck SRS at each replacement”