seat INFINITI FX35 2006 Service Manual

SRS-1
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
H RESTRAINTS
CONTENTS
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SECTION SRS
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SRS
Revision: 2006 December 2006 FX35/FX45
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
PRECAUTIONS ..................................................... ..... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
Precautions for SRS “AIR BAG” and “SEAT BELT
PRE-TENSIONER” Service ................................ ..... 3
Occupant Classification System Precaution ....... ..... 3
PREPARATION ...................................................... ..... 4
Commercial Service Tools ................................... ..... 4
SUPPLEMENTAL RESTRAINT SYSTEM (SRS) .. ..... 5
SRS Configuration .............................................. ..... 5
Front Seat Belt Pre-Tensioner with Load Limiter . ..... 6
Front Side Air Bag ............................................... ..... 6
Side Curtain Air Bag ............................................ ..... 6
Occupant Classification System (OCS) .............. ..... 7
Passenger Air Bag Status Condition ................... ..... 7
Component Parts of Occupant Classification Sys-
tem ...................................................................... ..... 7
TROUBLE DIAGNOSIS ......................................... ..... 8
Trouble Diagnosis Introduction ............................ ..... 8
DIAGNOSIS FUNCTION .................................. ..... 8
HOW TO PERFORM TROUBLE DIAGNOSIS
FOR QUICK AND ACCURATE REPAIR .......... ..... 8
WORK FLOW ................................................... ..... 9
Component Parts Location .................................. ... 10
Schematic ........................................................... .... 11
Wiring Diagram — SRS — .................................. ... 12
CONSULT-II Function ......................................... ... 17
DIAGNOSIS MODE FOR CONSULT-II ............ ... 17
HOW TO CHANGE SELF-DIAGNOSIS MODE
WITH CONSULT-II ........................................... ... 17
HOW TO ERASE SELF-DIAGNOSTIC
RESULTS ......................................................... ... 18
Self-Diagnosis Function (Without CONSULT-II) .. ... 18
HOW TO CHANGE SELF-DIAGNOSIS MODE
WITHOUT CONSULT-II ................................... ... 18
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 18
SRS Operation Check ......................................... ... 19
DIAGNOSTIC PROCEDURE 1 ........................ ... 19
Trouble Diagnosis with CONSULT-II ................... ... 21 DIAGNOSTIC PROCEDURE 2 ........................
... 21
DIAGNOSTIC PROCEDURE 3 ........................ ... 25
DIAGNOSTIC PROCEDURE 4 (CONTINUED
FROM DIAGNOSTIC PROCEDURE 2) ........... ... 27
DIAGNOSTIC PROCEDURE 5 ........................ ... 27
Trouble Diagnosis without CONSULT-II .............. ... 32
DIAGNOSTIC PROCEDURE 6 ........................ ... 32
WARNING LAMP FLASH CODE CHART ........ ... 32
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn OFF ...................................................... ... 36
DIAGNOSTIC PROCEDURE 7 ........................ ... 36
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn ON ........................................................ ... 37
DIAGNOSTIC PROCEDURE 8 ........................ ... 37
DRIVER AIR BAG MODULE ................................. ... 38
Removal and Installation ..................................... ... 38
REMOVAL ........................................................ ... 38
INSTALLATION ................................................ ... 39
SPIRAL CABLE ..................................................... ... 40
Removal and Installation ..................................... ... 40
REMOVAL ........................................................ ... 40
INSTALLATION ................................................ ... 40
FRONT PASSENGER AIR BAG MODULE ........... ... 42
Removal and Installation ..................................... ... 42
REMOVAL ........................................................ ... 42
INSTALLATION ................................................ ... 43
SIDE CURTAIN AIR BAG MODULE ..................... ... 44
Removal and Installation ..................................... ... 44
REMOVAL ........................................................ ... 44
INSTALLATION ................................................ ... 45
CRASH ZONE SENSOR ........................................ ... 46
Removal and Installation ..................................... ... 46
REMOVAL ........................................................ ... 46
INSTALLATION ................................................ ... 46
SIDE AIR BAG (SATELLITE) SENSOR ................ ... 47
Removal and Installation ..................................... ... 47
REMOVAL ........................................................ ... 47
INSTALLATION ................................................ ... 47
FRONT SEAT BELT PRE-TENSIONER ................ ... 48
Removal and Installation ..................................... ... 48

PRECAUTIONS SRS-3
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Revision: 2006 December 2006 FX35/FX45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NHS00073
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 SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” ServiceNHS00074

Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.

Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 min-
utes.
For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt
pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes
have passed.

Diagnosis sensor unit must always be installed with their arrow marks “ ⇐” pointing towards the front of the
vehicle for proper operation. Also check diagnosis sensor unit for cracks, deformities or rust before instal-
lation and replace as required.

The spiral cable must be aligned with the neutral position since its rotations are limited. Do not turn steer-
ing wheel and column after removal of steering gear.

Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad
side facing upward and seat mounted front side air bag module standing with the stud bolt side facing
down.

Conduct self-diagnosis to check entire SRS for proper function after replacing any components.

After air bag inflates, the front instrument panel assembly should be replaced if damaged.

Always replace instrument panel pad following front passenger air bag deployment.

Disposal, recycling, and transportation of air bag modules and seat belt pre-tensioners should be per-
formed in compliance with applicable federal, state and local laws and regulations.
Occupant Classification System PrecautionNHS0009N
Replace occupant classification system control unit and passenger front seat cushion as an assembly.
Refer to Refer to Service Manual .

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) SRS-5
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Revision: 2006 December 2006 FX35/FX45
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)PFP:28556
SRS ConfigurationNHS00076
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: 2006 December 2006 FX35/FX45
Front Seat Belt Pre-Tensioner with Load LimiterNHS00077
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 BagNHS00078
Front side air bag is built-in type.
The front seatbacks with built-in type side air bag have the labels as
shown.
Side Curtain Air BagNHS00079
The side curtain air bags have the labels as shown.
SRS444
SHIA0170E
BF-2006D

SUPPLEMENTAL RESTRAINT SYSTEM (SRS) SRS-7
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Revision: 2006 December 2006 FX35/FX45
Occupant Classification System (OCS)NHS0009O
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 NHS0009P
NOTE:
Passenger does not meet Ocuupant classification System specifications for passenger air bag activation.
Component Parts of Occupant Classification System NHS0009Q
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
PHIA1334E
1. Occupant classification system con-
trol unit 2.
Occupant classification system sen-
sor 3. Bladder
4. Front passenger air bag OFF indica-
tor (Cutoff telltaile)

SRS-10
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
Component Parts LocationNHS0007B
PHIA1335E
1. Driver air bag module 2. Front passenger air bag module 3. Spiral cable
4. Front side air bag module 5. Diagnosis sensor unit 6. Side air bag (Satellite) sensors
7. Seat belt pre-tensioners 8. Seat belt buckle switch 9. Side curtain air bag module
10. Crash zone sensor 11. Occupant classification system sen-
sor 12.Occupant classification system con-
trol unit

SRS-20
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
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-21, "DIAGNOSTIC
PROCEDURE 2" or SRS-27,
"DIAGNOSTIC PROCEDURE 5" .

Air bag is deployed.

Seat belt pre-tensioner is deployed. Go to
SRS-50, "
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-36, "
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-37, "
Trouble Diagnosis:
“AIR BAG” Warning Lamp Does Not
Turn ON" .
SHIA0011E
SHIA0012E
SHIA0013E
SHIA0014E

SRS-22
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
CONSULT-II Diagnostic Code Chart (“SELF-DIAG [CURRENT]”)
Diagnostic item Explanation Repair order
“Recheck SRS at each replacement”
NO DTC IS
DETECTED. When malfunction is
indicated by the “AIR
BAG” warning lamp in
User mode.

Low battery voltage (Less than 9V)
Go to SRS-25, "DIAGNOSTIC PRO-
CEDURE 3" after charging the bat-
tery.

Self-diagnostic result “SELF-DIAG
[PAST]” (previously stored in the
memory) might not be erased after
repair.

Intermittent malfunction has been
detected in the past.

Go to SRS-27, "DIAGNOSTIC PRO-
CEDURE 4 (CONTINUED FROM
DIAGNOSTIC PROCEDURE 2)" .

Go to SRS-27, "DIAGNOSTIC PRO-
CEDURE 5" .

No malfunction is detected. —
DRIVER AIR BAG
MODULE
[OPEN]

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 AIR BAG
MODULE
[VB-SHORT]

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

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

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

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]

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

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

Front passenger air bag module circuit is shorted between lines.
CRASH ZONE SEN
[UNIT FAIL]
CRASH ZONE SEN
[COMM FAIL]

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]

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]

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

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

Front LH side air bag module circuit is shorted between lines.

TROUBLE DIAGNOSIS SRS-23
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Revision: 2006 December 2006 FX35/FX45
SIDE MODULE RH
[OPEN]
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]

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

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

Front RH side air bag module circuit is shorted between lines.
SATELLITE SENS LH
[UNIT FAIL]
SATELLITE SENS LH
[COMM FAIL]

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]
SATELLITE SENS RH
[COMM FAIL]

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]

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]

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

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

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

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]

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

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

Front RH pre-tensioner circuit is shorted between lines.
CURTAIN MODULE LH
[OPEN]

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]

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

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

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

SRS-24
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
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.
CURTAIN MODULE RH
[OPEN]
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]

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

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

RH side curtain air bag module circuit is shorted between lines.
CONTROL UNIT

Diagnosis sensor unit is malfunctioning. 1. Visually check the wiring harness connection.
2. Replace the diagnosis sensor unit.
PASS A/B INDCTR
CKT

Cutoff telltale circuit is open or shorted to grand or the circuits
are shorted each other. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace cutoff telltale.
4. Replace the diagnosis sensor unit.
OCCUPANT SENS C/U
[UNIT FAIL]

Trouble occurs in Occupant Classification System-CU.
Replace passenger side seat cush-
ion assembly.
OCCUPANT SENS
[UNIT FAIL]

Trouble occurs in Occupant Classification System-SENS.
Replace passenger side seat cush-
ion assembly.
BELT TENSION SENS
[UNIT FAIL]

Trouble occurs in Belt Tension sensor (BTS), circuit of BTS—
Occupant Classification System-CU, or Occupant Classification
System-CU. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace passenger side seat belt assembly.
4. Replace the diagnosis sensor unit.
OCCUPANT SENS C/U
[COMM FAIL]

Trouble occurs in Occupant Classification System-CU, circuit of
Occupant Classification System-CU—Diagnosis Senser Unit, or
Diagnosis Sensor Unit. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visible damage.
3. Replace passenger side seat cush- ion assembly.
4. Replace the diagnosis sensor unit.
FRONTAL COLLISION-
DETECTION

Seat belt pre-tensioner and front air bag are deployed.
Go to SRS-50, "For Frontal Colli-
sion" .
SIDE COLLISION
DETECTION

Side and curtain air bag is deployed.
Go to SRS-52, "For Side Collision" .
Diagnostic item Explanation
Repair order
“Recheck SRS at each replacement”