2008 INFINITI FX35 wiring

SRS-1
RESTRAINTS
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SECTION SRS
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CONTENTS
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
SERVICE INFORMATION .. ..........................2
DTC INDEX ..................................................... .....2
B1001-B1015 ...................................................... ......2
B1017-B1035 ............................................................2
B1042-B1057 ............................................................3
B1058-B1073 ............................................................3
B1074-B1089 ............................................................4
B1106-B1120 ............................................................4
B1122-B1137 ............................................................5
B1138-B1153 ............................................................5
B1202-B1210 ............................................................5
PRECAUTIONS ...................................................7
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
7
Precaution for SRS "AIR BAG" and "SEAT BELT
PRE-TENSIONER" Service ......................................
7
Occupant Classification System Precaution .............7
PREPARATION ...................................................8
Commercial Service Tool .................................... ......8
SUPPLEMENTAL RESTRAINT SYSTEM
(SRS) ...................................................................
9
SRS Configuration .............................................. ......9
Front Seat Belt Pre-tensioner with Load Limiter .....10
Front Side Air Bag ...................................................10
Side Curtain Air Bag ................................................10
Occupant Classification System (OCS) ..................10
Passenger Air Bag Status Condition .......................11
Component Parts of Occupant Classification Sys-
tem ..........................................................................
11
TROUBLE DIAGNOSIS .....................................12
Trouble Diagnosis Introduction ........................... ....12
Component Parts Location ......................................14
Schematic ...............................................................15
Wiring Diagram - SRS - ...........................................16
CONSULT-III Function ........................................
....21
Self-Diagnosis Function (Without CONSULT-III) .....22
SRS Operation Check .............................................23
Trouble Diagnosis with CONSULT-III ......................24
Trouble Diagnosis without CONSULT-III .................28
Trouble Diagnosis: "AIR BAG" Warning Lamp
Does Not Turn OFF .................................................
32
Trouble Diagnosis: "AIR BAG" Warning Lamp
Does Not Turn ON ...................................................
32
DRIVER AIR BAG MODULE ............................34
Removal and Installation .........................................34
SPIRAL CABLE ................................................36
Removal and Installation .........................................36
FRONT PASSENGER AIR BAG MODULE ......38
Removal and Installation .........................................38
SIDE CURTAIN AIR BAG MODULE ................40
Removal and Installation .........................................40
CRASH ZONE SENSOR ...................................42
Removal and Installation ..................................... ....42
SIDE AIR BAG (SATELLITE) SENSOR ...........43
Removal and Installation .........................................43
DIAGNOSIS SENSOR UNIT .............................44
Removal and Installation .........................................44
FRONT SEAT BELT PRE-TENSIONER ...........45
Removal and Installation .........................................45
OCCUPANT CLASSIFICATION SYSTEM
CONTROL UNIT ................................................
46
Removal and Installation .........................................46
COLLISION DIAGNOSIS ..................................47
For Frontal Collision ................................................47
For Side Collision ....................................................48
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PRECAUTIONSSRS-7
< SERVICE INFORMATION >
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PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000001612877
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty 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 “SUPPLEMENTAL RESTRAINT SYS-
TEM” and “SEAT BELTS” of this Service Manual.
WARNING:
• To avoid rendering the SRS inoper ative, 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 performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SUPPLEMEN TAL RESTRAINT SYSTEM”.
 Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
Precaution for SRS "AIR BAG" and "SEAT BELT PRE-TENSIONER" Service
INFOID:0000000001327741
 Do not use electrical test equipment to check SRS ci rcuits 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 remov ed, it is still possible for the air bag and seat belt pre-
tensioner to deploy. Therefore, do not work on any SR S 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 installa-
tion and replace as required.
 The spiral cable must be aligned with the neutral position since its rotations are limited. Do not turn steering
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 m odules and seat belt pre-tensioners should be performed
in compliance with applicable federal, state and local laws and regulations.
Occupant Classification System PrecautionINFOID:0000000001327742
Replace occupant classification system control uni t and passenger front seat cushion as an assembly.
Refer to Refer to Service Manual .
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SRS-12
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
Trouble Diagnosis IntroductionINFOID:0000000001524161
CAUTION:
 Do not use electrical test equipment on any circuit related to the SRS unless instructed in this Ser-
vice Manual. SRS wiring harnesses can be identifi ed by yellow and/or orange harnesses or harness
connectors.
 Do not repair, splice or modify the SRS wiring harn ess. If the harness is damaged, replace it with a
new one.
 Keep ground portion clean.
DIAGNOSIS FUNCTION
The SRS self-diagnostic results can be read by us ing “AIR BAG” warning lamp and/or CONSULT-III.
The User mode is exclusively prepared for the customer (driver). This mode warns the driver of a system mal-
function through the operation of the “AIR BAG” warning lamp.
The Diagnosis mode allows the technician to locate and inspect the malfunctioning part.
The mode applications for the “AIR BAG” wa rning lamp and CONSULT-III are as follows:
HOW TO PERFORM TROUBLE DIAGNOSIS FOR QUICK AND ACCURATE REPAIR
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malf unction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Information from Customer
WHAT..... Vehicle model
WHEN..... Date, Frequencies
WHERE..... Road conditions
HOW..... Operating conditions, Symptoms
Preliminary Check
Make sure the following parts are in good order.
 Battery (Refer to SC-4, "
How to Handle Battery".)
 Fuse (Refer to SRS-16, "
Wiring Diagram - SRS -".)
 System component-to-harness connections
Work Flow
OVERALL SEQUENCE
User mode Diagnosis mode Display type
“AIR BAG” warning lamp X X ON-OFF operation CONSULT-III — X Monitoring
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SRS-16
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
Wiring Diagram - SRS -
INFOID:0000000001524164
THWM0255E
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TROUBLE DIAGNOSISSRS-25
< SERVICE INFORMATION >
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OCCUPANT SENS
[UNIT FAIL]
[1018]  Trouble occurs in Occupant Classification System-SENS. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace front passenger seat cushion and occupant classifica-
tion system control unit as an as-
sembly.
4. Replace diagnosis sensor unit (ACU).
BELT TENSION SENS
[UNIT FAIL]
[B1019]  Trouble occurs in Belt Tension
sensor (BTS), circuit of BTS—Oc-
cupant Classification System-CU, or Occupant Classification
System-CU. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace passenger side seat belt assembly.
4. Replace diagnosis sensor unit
(ACU).
OCCUPANT SENS C/U
[UNIT FAIL]
[B1017] [B1020]
[B1021]  Trouble occurs in Occupant Classification System-CU. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi-
ble damage.
3. Replace front passenger seat cushion and occupant classifica-
tion system control unit as an as-
sembly.
4. Replace diagnosis sensor unit
(ACU).
OCCUPANT SENS C/U
[COMM FAIL]
[B1022]  Trouble occurs in Occupant Classification System-CU, circuit of
OCS-CU-ACU, or ACU. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi-
ble damage.
3. Replace front passenger seat cushion and occupant classifica-
tion system control unit as an as-
sembly.
4. Replace diagnosis sensor unit
(ACU).
PASS A/B INDCTR
CKT
[B1023]  Front passenger air bag cut-off indicator circuit is open, or short-
ed each other or to ground. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace front passenger air bag off indicator unit.
4. Replace diagnosis sensor unit
(ACU).
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1026-B1031]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
(ACU)
CRASH ZONE SEN
[UNIT FAIL]
[B1033] [B1034]
CRASH ZONE SEN
[COMM FAIL]
[B1035]  Crash zone sensor is out of order. 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace crash zone sensor.
4. Replace diagnosis sensor unit (ACU).
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1042-B1047]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
(ACU)
Diagnostic item Explanation
Repair order
“Recheck SRS at each replacement”
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SRS-26
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
DRIVER AIR BAG
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 visi- ble damage.
3. Replace driver air bag module.
4. Replace spiral cable.
5. Replace diagnosis sensor unit (ACU).
DRIVER AIR BAG
MODULE
[VB-SHORT]
[B1050] [B1055]  Driver air bag module circuit is shorted to a power supply circuit
(including the spiral cable).
DRIVER AIR BAG
MODULE
[GND-SHORT]
[B1051] [B1056]  Driver air bag module circuit is shorted to ground (including the
spiral cable).
DRIVER AIR BAG
MODULE
[SHORT]
[B1052] [B1057]  Driver air bag module circuit is shorted between lines.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1058-B1063]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
(ACU)
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 visi- ble damage.
3. Replace front passenger air bag
module.
4. Replace diagnosis sensor unit (ACU).
ASSIST A/B MODULE
[VB-SHORT]
[B1066] [B1071]
 Front passenger air bag module circuit is shorted to a power sup-
ply 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.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1074-B1079]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
(ACU)
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 visi- ble damage.
3. Replace front RH seat belt.
4. Replace diagnosis sensor unit
(ACU).
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 Explanation
Repair order
“Recheck SRS at each replacement”
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TROUBLE DIAGNOSISSRS-27
< SERVICE INFORMATION >
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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 visi- ble 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.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[ B 11 0 6 - B 1111 ]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit
(ACU).
SATELLITE SENS RH
[UNIT FAIL]
[ B 111 3 ] [ B 111 4 ]
SATELLITE SENS RH
[COMM FAIL]
[ B 111 5 ]  RH side air bag (Satellite) sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi-
ble damage.
3. Replace RH side air bag (Satel- lite) sensor.
4. Replace diagnosis sensor unit (ACU).
SATELLITE SENS LH
[UNIT FAIL]
[ B 111 8 ] [ B 111 9 ]
SATELLITE SENS LH
[COMM FAIL]
[B1120]  LH side air bag (Satellite) sensor 1. Visually check the wiring harness
connection.
2. Replace the harness if it has visi- ble damage.
3. Replace LH side air bag (Satel-
lite) sensor.
4. Replace diagnosis sensor unit (ACU).
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[ B 11 2 2 - B 11 2 7 ]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit
(ACU).
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 visi- ble damage.
3. Replace front RH side air bag module.
4. Replace diagnosis sensor unit (ACU).
SIDE MODULE RH
[VB-SHORT]
[B1130]
 Front RH side air bag module circuit is shorted to a power supply
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.
Diagnostic item Explanation
Repair order
“Recheck SRS at each replacement”
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SRS-28
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
NOTE:
Follow the procedures in numerical order when repairing malfunctioning parts. Confirm whether malfunction is
eliminated using air bag warning lamp or CONSULT-III eac h time repair is finished. If malfunction is still
observed, proceed to the next step. When malfunction is eliminated, further repair work is not required.
Trouble Diagnosis without CONSULT-IIIINFOID:0000000001524169
DIAGNOSTIC PROCEDURE
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 visi- ble damage.
3. Replace front LH side air bag module.
4. Replace diagnosis sensor unit
(ACU).
SIDE MODULE LH
[VB-SHORT]
[B1135]
 Front LH side air bag module circuit is shorted to a power supply
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.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[ B 11 3 8 - B 11 4 3 ]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit
(ACU).
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 visi-
ble damage.
3. Replace RH side curtain air bag module.
4. Replace diagnosis sensor unit (ACU).
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.
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 visi- ble damage.
3. Replace LH side curtain air bag module.
4. Replace diagnosis sensor unit
(ACU).
CURTAIN MODULE LH
[VB-SHORT]
[B1151]
 LH side curtain air bag module circuit is shorted to a power sup-
ply circuit.
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.
DIAGNOSIS SENSOR
UNIT (CONTROL UNIT)
[B1202-B1207]  Diagnosis sensor is out of order.  Replace diagnosis sensor unit.
FRONTAL COLLISION-
DETECTION
[B1209]  Seat belt pre-tensioner and front air bag are deployed.  Go to
SRS-47, "
For Frontal Colli-
sion".
SIDE COLLISION DE-
TECTION
[B1210]  Side and curtain air bag is deployed.  Go to
SRS-48, "
For Side Collision".
Diagnostic item Explanation
Repair order
“Recheck SRS at each replacement”
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