sensor INFINITI QX56 2004 Factory Service Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2004, Model line: QX56, Model: INFINITI QX56 2004Pages: 3371, PDF Size: 78.5 MB
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FRONT SEAT
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4. From inside of the seatback, squeeze the headrest holder tabs
at the base of the stay pipe and pull up to remove.
NOTE:
Before installing the headrest holder, check its orientation (front/
rear and right/left).
Assembly
Assembly is in the reverse order of disassembly.
REMOVAL OF SEATBACK ASSEMBLY
1. Remove the headrest.
2. For driver seatback unhook the j-channel. For passenger seatback, remove the seatback board from the
back of the seatback.
3. Remove the side air bag harness connector from the seat cushion.
4. Remove the mounting bolts (2 for each side) and seatback assembly.
INSTALLATION OF SEATBACK ASSEMBLY
Installation is in the reverse order of removal.
SEAT CUSHION TRIM AND PAD
Disassembly
CAUTION:
Front passenger seat is equipped with an Occupant Classification System sensor and control
module. Do not disassemble front passenger seat cushion assembly or remove the trim as this
will affect the Occupant Classification System calibration.
Always replace passenger seat cushion as an assembly.
When removed, the passenger seat cushion must always be placed pan side UP to prevent dam-
age.
During installation, the wire harness clips must be reinstalled in the holes they were originally in.
Do not add additional clips.
The Occupant Classification System control module can only be replaced as part of the seat cush-
ion assembly.
NOTE:
If the vehicle has been involved in a collision the seat must be inspected for damage. Refer to SRS-60, "
COL-
LISION DIAGNOSIS" .
1. Remove the power seat switch knobs, power seat switch
escutcheon and lumbar switch bezel.
2. Remove the power seat and power lumbar switches.
LRS023
LIIA1581E
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SRS-1
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
H RESTRAINTS
CONTENTS
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SECTION SRS
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SRS
Revision: August 20072004 QX56 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
Trouble Diagnosis Precaution .................................. 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 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 ............................... 6
Direct-connect SRS Component Connectors ........... 7
TROUBLE DIAGNOSIS .............................................. 8
Trouble Diagnosis Introduction ................................. 8
DIAGNOSIS FUNCTION ....................................... 8
HOW TO PERFORM TROUBLE DIAGNOSES
FOR QUICK AND ACCURATE REPAIR ............... 8
WORK FLOW ........................................................ 9
SRS Components Parts Location ........................... 10
Schematic ...............................................................11
Wiring Diagram — SRS — ..................................... 12
CONSULT-II Function (AIR BAG) ........................... 18
CONSULT-II Function ............................................ 18
HOW TO CHANGE SELF-DIAGNOSIS MODE
WITH CONSULT-II .............................................. 18
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 19
Self-Diagnosis Function (Without CONSULT-II) ..... 19
HOW TO CHANGE SELF-DIAGNOSIS MODE ... 19
HOW TO ERASE SELF-DIAGNOSIS RESULTS ... 20
SRS Operation Check ............................................ 20
DIAGNOSTIC PROCEDURE 1 ........................... 20
Trouble Diagnosis With CONSULT-II ..................... 22
DIAGNOSTIC PROCEDURE 2 ........................... 22
DIAGNOSTIC PROCEDURE 3 ........................... 28DIAGNOSTIC PROCEDURE 4 (CONTINUED
FROM DIAGNOSTIC PROCEDURE 2) .............. 30
DIAGNOSTIC PROCEDURE 5 ........................... 30
Trouble Diagnosis Without CONSULT-II ................. 37
DIAGNOSTIC PROCEDURE 6 ........................... 37
WARNING LAMP FLASH CODE CHART ........... 38
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn Off ............................................................ 43
DIAGNOSTIC PROCEDURE 6 ........................... 43
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn On ............................................................ 44
DIAGNOSTIC PROCEDURE 7 ........................... 44
DRIVER AIR BAG MODULE .................................... 45
Removal and Installation ........................................ 45
REMOVAL ........................................................... 45
INSTALLATION ................................................... 46
SPIRAL CABLE ........................................................ 47
Removal and Installation ........................................ 47
REMOVAL ........................................................... 47
INSTALLATION ................................................... 48
FRONT PASSENGER AIR BAG MODULE .............. 50
Removal and Installation ........................................ 50
REMOVAL ........................................................... 50
INSTALLATION ................................................... 50
WIRING HARNESS MODIFICATION .................. 51
SIDE CURTAIN AIR BAG MODULE ........................ 53
Removal and Installation ........................................ 53
REMOVAL ........................................................... 53
INSTALLATION ................................................... 53
CRASH ZONE SENSOR ........................................... 55
Removal and Installation ........................................ 55
REMOVAL ........................................................... 55
INSTALLATION ................................................... 55
SIDE AIR BAG (SATELLITE) SENSOR ................... 56
Removal and Installation ........................................ 56
REMOVAL ........................................................... 56
INSTALLATION ................................................... 56
FRONT SEAT BELT PRE-TENSIONER ................... 57
Removal and Installation ........................................ 57
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SRS-2Revision: August 20072004 QX56 DIAGNOSIS SENSOR UNIT ..................................... 58
Removal and Installation ........................................ 58
REMOVAL ........................................................... 58
INSTALLATION .................................................... 58
ECU DISCRIMINATED NO. ................................. 58
OCCUPANT CLASSIFICATION SYSTEM CON-
TROL UNIT ................................................................ 59
Removal and Installation ........................................ 59
COLLISION DIAGNOSIS .......................................... 60
For Frontal Collision ................................................ 60
SRS INSPECTION (FOR FRONTAL COLLI-
SION) ................................................................... 60For Side Collision ....................................................61
WHEN SRS IS ACTIVATED IN THE SIDE COL-
LISION .................................................................61
WHEN SRS IS NOT ACTIVATED IN THE SIDE
COLLISION ..........................................................61
SRS INSPECTION (FOR SIDE COLLISION) ......61
For Rollover ............................................................62
WHEN SRS IS ACTIVATED IN THE ROLLOVER ...62
WHEN SRS IS NOT ACTIVATED IN THE ROLL-
OVER ...................................................................62
SRS INSPECTION (FOR ROLLOVER) ...............63
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PRECAUTIONS
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EHS000VY
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.
WA RN ING:
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” ServiceEHS000VZ
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.
The air bag diagnosis sensor unit must always be installed with the arrow mark “⇐” pointing toward the
front of the vehicle for proper operation. Also check air bag diagnosis sensor unit for cracks, deformities or
rust before installation and replace as required.
The spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to
turn steering wheel or 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.
Occupant Classification System PrecautionEHS000W0
Replace control unit and passenger front seat cushion as an assembly.
Trouble Diagnosis PrecautionEHS000W1
When you read wiring diagrams, refer to the following:
GI-15, "How to Read Wiring Diagrams" in GI section
PG-4, "POWER SUPPLY ROUTING CIRCUIT" in PG section
When you perform trouble diagnosis, refer to the following:
GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section
GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section
Check for any service bulletins before servicing the vehicle.
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)PFP:28556
SRS ConfigurationEHS000W4
The air bag deploys if the air bag diagnosis sensor unit is activated while the ignition switch is in the ON or
START position.
The collision modes for which supplemental restraint systems are activated are different among the SRS sys-
tems. For example, the driver air bag module, front passenger air bag module, front seat belt pre-tensioners
and front seat belt buckle pre-tensioners are activated in a frontal collision but not in a side collision.
SRS configurations for some collision modes are as follows:
WHIA0215E
SRS configuration Frontal collision Left side collisionRight side colli-
sionRollover
Driver air bag module x — — —
Front passenger air bag module x — — —
Front LH seat belt pre-tensioner x — — x
Front LH seat belt buckle pre-tensioner assembly x — — x
Front RH seat belt pre-tensioner x — — x
Front RH seat belt buckle pre-tensioner assembly x — — x
Front LH side air bag module — x — —
Front RH side air bag module — — x —
LH side curtain air bag module — x — x
RH side curtain air bag module — — x×
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SRS-6
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
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Front Seat Belt Pre-tensioner with Load LimiterEHS000W5
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 BagEHS000W6
Front side air bag modules are built into the front seatback assemblies.
Vehicles with side air bags are equipped with labels as shown.
Side Curtain Air BagEHS000W7
Side curtain air bag modules are located above the vehicle headlining.
Vehicles with side curtain air bags are equipped with labels as
shown.
Occupant Classification System EHS000W8
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 system 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
classification of passenger, the occupant classification system sends a signal to the air bag diagnosis sensor
unit. The air bag diagnosis sensor unit uses this signal to determine deployment or non deployment of the pas-
senger front air bag in the event of a collision. Depending on the signal received, the air bag diagnosis sensor
SRS4 44
WHIA0008E
WHIA0041E
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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
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unit can disable the passenger front air bag completely. If this occurs the air bag diagnosis sensor unit will turn
on the PASS AIR BAG OFF indicator located in the center of the instrument panel (cluster lid C).
Direct-connect SRS Component ConnectorsEHS000W9
The following SRS components use direct-connect style harness connectors.
Driver front air bag module
Passenger front air bag module
LH side curtain air bag module
RH side curtain air bag module
Front LH seat belt pre-tensioner
Front RH seat belt pre-tensioner
Front LH seat belt buckle pre-tensioner assembly
Front RH seat belt buckle pre-tensioner assembly
Always pull up to release black locking tab prior to removing connector from SRS component.
Always push down to lock black locking tab after installing connector
to SRS component. When locked, the black locking tab is level with
the connector housing.
WHIA0187E
WHIA0103E
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SRS-10
TROUBLE DIAGNOSIS
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SRS Components Parts LocationEHS000WB
1. Side curtain air bag modules 2. Front RH side air bag module 3. Belt tension sensor
4. RH side air bag (satellite) sensor 5. Front RH seat belt pre-ten-
sioner6. Seat belt buckle pre-tensioner assembly
RH
7. Occupant classification system sen-
sor8. Occupant classification system
control unit9. Front passenger air bag off indicator
10. Front passenger air bag module 11. Crash zone sensor 12. Air bag warning lamp
13. Spiral cable 14. Driver air bag module 15. LH side air bag (satellite) sensor
16. Front LH seat belt pre-tensioner 17. Air bag diagnosis sensor unit 18. Front LH side air bag module
WHIA0216E
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SRS-18
TROUBLE DIAGNOSIS
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CONSULT-II Function (AIR BAG)EHS001BB
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II FunctionEHS000WE
HOW TO CHANGE SELF-DIAGNOSIS MODE WITH CONSULT-II
From User Mode to Diagnosis Mode
After selecting “AIR BAG” on the “SELECT SYSTEM” screen, User mode automatically changes to Diagnosis
mode.
From Diagnosis Mode to User Mode
To return to User mode from Diagnosis mode, touch “BACK” key of CONSULT-II until “SELECT SYSTEM”
appears, Diagnosis mode automatically changes to User mode.
AIR BAG diagnostic mode Description
SELF-DIAG [CURRENT]A current Self-diagnosis result (also indicated by the number of warning lamp flashes in the Diagnosis
mode) is displayed on the CONSULT-II screen in real time. This refers to a malfunctioning part requir-
ing repairs.
SELF-DIAG [PAST]Diagnosis results previously stored in the memory are displayed on the CONSULT-II screen. The
stored results will remain until memory erasing is executed.
TROUBLE DIAG RECORDWith TROUBLE DIAG RECORD, diagnosis results previously erased by a reset operation can be dis-
played on the CONSULT-II screen.
ECU DISCRIMINATED NO.The air bag diagnosis sensor unit for each vehicle
model is assigned with its own, individual classifi-
cation number. This number will be displayed on
the CONSULT-II screen, as shown. When replac-
ing the air bag diagnosis sensor unit, refer to the
part number for the compatibility. After installation,
replacement with a correct unit can be checked by
confirming this classification number on the CON-
SULT-II screen.
For INFINITI MODEL JA60, the air bag diagno-
sis sensor unit discriminated number assigned
is F615.
ARS3 66
SRS8 03
SRS8 04
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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-37,
"DIAGNOSTIC PROCEDURE 6" .
Air bag is deployed.
Seat belt pre-tensioner is deployed.
Seat belt buckle pre-tensioner
assembly is deployed.Go to SRS-60, "
COLLISION DIAG-
NOSIS" .
Air bag diagnosis sensor unit is mal-
functioning.
Air bag power supply circuit is mal-
functioning.
SRS air bag warning lamp circuit is
malfunctioning.Go to SRS-43, "
Trouble Diagnosis:
“AIR BAG” Warning Lamp Does Not
Tu rn O ff" .
Air bag diagnosis sensor unit is mal-
functioning.
Air bag warning lamp circuit is mal-
functioning.Go to SRS-44, "
Trouble Diagnosis:
“AIR BAG” Warning Lamp Does Not
Tu rn O n" .
SHIA0 011 E
SHIA0012E
SHIA0013E
SHIA0014E