belt INFINITI QX56 2004 Factory Service Manual

SRS-60
COLLISION DIAGNOSIS
Revision: August 20072004 QX56
COLLISION DIAGNOSISPFP:00015
For Frontal CollisionEHS000WW
Check the SRS components using the following table.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to
SRS-20, "
SRS Operation Check" .
SRS INSPECTION (FOR FRONTAL COLLISION)
Part SRS is activated SRS is NOT activated
Air bag module
(driver and front pas-
senger air bag mod-
ule)REPLACE
Install with new fas-
teners.1. Remove air bag module. Check harness cover and connectors for damage, termi-
nals for deformities, and harness for binding.
2. Install driver air bag module into the steering wheel to check fit and alignment with
the wheel.
3. Install passenger air bag module into the instrument panel to check fit with the
instrument panel.
4. If no damage is found, reinstall with new fasteners.
5. If damaged—REPLACE. Install air bag modules with new fasteners.
Crash zone sensor REPLACE the crash
zone sensor and
bracket with new fas-
teners.1. Remove the crash zone sensor. Check harness connectors for damage, terminals
for deformities, and harness for binding.
2. Check for visible signs of damage (dents, cracks, deformation) of the crash zone
sensor and bracket.
3. Install the crash zone sensor to check fit.
4. If no damage is found, reinstall with new fasteners.
5. If damaged—REPLACE the crash zone sensor and bracket with new fasteners.
Seat belt pre-ten-
sioner assemblies
and seat belt buckle
pre-tensioner assem-
bliesREPLACE
Install seat belt pre-
tensioner and seat
belt buckle pre-ten-
sioner assemblies
with new fasteners.1. Remove seat belt pre-tensioners and seat belt buckle pre-tensioner assemblies.
Check harness cover and connectors for damage, terminals for deformities, and
harness for binding.
2. Check belts for damage and anchors for loose mounting.
3. Check retractor for smooth operation.
4. Check seat belt adjuster for damage.
5. If no damage is found, reinstall seat belt pre-tensioner assembly.
6. If damaged—REPLACE. Install the seat belt pre-tensioners or seat belt buckle pre-
tensioner assemblies with new fasteners.
Diagnosis sensor unit REPLACE
Install with new fas-
teners.1. Check case for dents, cracks or deformities.
2. Check connectors for damage, and terminals for deformities.
3. If no damage is found, reinstall with new fasteners.
4. If damaged—REPLACE. Install diagnosis sensor unit with new fasteners.
Steering wheel 1. Visually check steering wheel for deformities.
2. Check harness (built into steering wheel) and connectors for damage, and terminals for deformities.
3. Install driver air bag module into the steering wheel to check fit and alignment with the wheel.
4. Check steering wheel for excessive free play.
5. If no damage is found, reinstall.
6. If damaged—REPLACE.
Spiral cable REPLACE the spiral
cable.1. Visually check spiral cable and combination switch for damage.
2. Check connectors and protective tape for damage.
3. Check steering wheel for noise, binding or heavy operation.
4. If no damage is found, reinstall.
5. If damaged—REPLACE.
Occupant classifica-
tion system (Passen-
ger seat)1. Remove passenger seat.
2. Check control unit case for dents, cracks of deformities.
3. Check connectors and pressure sensor tube for damage, and terminals for deformities.
4. Check seat frame and cushion pan for dents or deformities.
5. If no damage is found, reinstall seat with new fasteners.
6. If damaged — REPLACE seat cushion assembly with new fasteners.

SRS-62
COLLISION DIAGNOSIS
Revision: August 20072004 QX56
For RolloverEHS001BC
Check the SRS components using the following table.

After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to
SRS-20, "
SRS Operation Check" .
WHEN SRS IS ACTIVATED IN THE ROLLOVER
1. Replace the following components:
–Diagnosis sensor unit
–(LH or RH) side air bag (satellite) sensor (on the side on which side air bag is activated)
2. Check the SRS components and the related parts using the following table.
–Replace any SRS components and the related parts showing visible signs of damage (dents, cracks,
deformation).
3. Conduct self-diagnosis using CONSULT-II and “AIR BAG” warning lamp. Refer to SRS-20, "
SRS Opera-
tion Check" for details. Ensure entire SRS operates properly.
WHEN SRS IS NOT ACTIVATED IN THE ROLLOVER
1. Check the SRS components and the related parts using the following table.
–If the front seat back assembly is damaged, the front seat back assembly must be replaced.
2. Conduct self-diagnosis using CONSULT-II and “AIR BAG” warning lamp. Refer to SRS-20, "
SRS Opera-
tion Check" for details. Ensure entire SRS operates properly.
Diagnosis sensor unit REPLACE the diag-
nosis sensor unit with
new fasteners.1. Check case and bracket for dents, cracks or deformities.
2. Check connectors for damage, and terminals for deformities.
3. If no damage is found, reinstall the diagnosis sensor unit with new fasteners.
4. If damaged—REPLACE the diagnosis sensor unit with new fasteners.
Seat belt pre-ten-
sioner assembly and
seat belt buckle pre-
tensioner assembly1. Check if the seat belt can be extended smoothly.
If the seat belt cannot be extended smoothly,
–Check for deformities of the center pillar inner.
–If the center pillar inner has no damage, REPLACE the seat belt pre-tensioner assembly.
2. Remove the seat belt pre-tensioner assembly and the seat belt buckle pre-tensioner assembly on the colli-
sion side. Check harness cover and connectors for damage, terminals for deformities, and harness for bind-
ing.
3. Check for visible signs of damage (dents, cracks, deformation) of the seat belt pre-tensioner assembly and
the seat belt buckle pre-tensioner assembly.
4. Check seat belt adjuster for damage.
5. If no damage is found, reinstall the seat belt pre-tensioner assembly and the seat belt buckle pre-tensioner
assembly.
6. If damaged—REPLACE the seat belt pre-tensioner assembly or the seat belt buckle pre-tensioner assem-
bly with new fasteners.
Seat (with front side
air bag)REPLACE front seat-
back assembly.1. Visually check the seat on the collision side.
2. Remove the seat on the collision side and check the following for damage and
deformities.
–Harness, connectors and terminals
–Frame and recliner (for front and rear seat), and also adjuster and slides (for front
seat)
3. If no damage is found, reinstall the seat.
4. If damaged—REPLACE the damaged seat parts using new fasteners. If the front
seat back is damaged, the front seat back assembly must be replaced.
Center inner pillar 1. Check the center inner pillar on the collision side for damage (dents, cracks, deformation).
2. If damaged—REPAIR the center inner pillar.
Trim/headlining 1. Check for visible signs of damage (dents, cracks, deformation) of the interior trim on the collision side.
2. If damaged—REPLACE the damaged trim parts. Part SRS is activated SRS is NOT activated

COLLISION DIAGNOSIS
SRS-63
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SRS
Revision: August 20072004 QX56
SRS INSPECTION (FOR ROLLOVER)
Part SRS is activated SRS is NOT activated
(LH or RH) side cur-
tain air bag moduleReplace the side cur-
tain air bag module.
(Repair the center pil-
lar inner, etc. before
installing new one if
damaged.)1. Check for visible signs of damage (dents, tears, deformation) of the center pillar on
the collision side.
2. If damaged—Remove the side curtain air bag module.
3. Check for visible signs of damaged (tears etc.) of the side curtain air bag module.
4. Check harness and connectors for damage, and terminals for deformities.
5. If no damage is found, reinstall the side curtain air bag module with new fasteners.
6. If damaged—REPLACE the side curtain air bag module with new fasteners.
Front (LH or RH) side
air bag moduleREPLACE front seat-
back assembly.1. Check for visible signs of damage (dents, tears, deformation) of the seat back on
the collision side.
2. Check harness and connectors for damage, and terminals for deformities.
3. If damaged—REPLACE the front seatback assembly.
(LH or RH) side air
bag (satellite) sensor REPLACE the side
air bag (satellite) sen-
sor on the collision
side with new fasten-
ers.
(Repair the center pil-
lar inner, etc. before
installing new one if
damaged.)1. Remove the side air bag (satellite) sensor on the collision side. Check harness
connectors for damage, terminals for deformities, and harness for binding.
2. Check for visible signs of damage (dents, cracks, deformation) of the side air bag
(satellite) sensor.
3. Install the side air bag (satellite) sensor to check fit.
4. If no damage is found, reinstall the side sir bag (satellite) sensor with new fasten-
ers.
5. If damaged—REPLACE the side air bag (satellite) sensor with new fasteners.
Diagnosis sensor unit REPLACE the diag-
nosis sensor unit with
new fasteners.1. Check case and bracket for dents, cracks or deformities.
2. Check connectors for damage, and terminals for deformities.
3. If no damage is found, reinstall the diagnosis sensor unit with new fasteners.
4. If damaged—REPLACE the diagnosis sensor unit with new fasteners.
Seat belt pre-ten-
sioner assembly and
seat belt buckle pre-
tensioner assembly1. Check if the seat belt can be extended smoothly.
If the seat belt cannot be extended smoothly,
–Check for deformities of the center pillar inner.
–If the center pillar inner has no damage, REPLACE the seat belt pre-tensioner assembly.
2. Remove the seat belt pre-tensioner assembly and the seat belt buckle pre-tensioner assembly on the colli-
sion side. Check harness cover and connectors for damage, terminals for deformities, and harness for bind-
ing.
3. Check for visible signs of damage (dents, cracks, deformation) of the seat belt pre-tensioner assembly and
the seat belt buckle pre-tensioner assembly.
4. Check seat belt adjuster for damage.
5. If no damage is found, reinstall the seat belt pre-tensioner assembly and the seat belt buckle pre-tensioner
assembly.
6. If damaged—REPLACE the seat belt pre-tensioner assembly or the seat belt buckle pre-tensioner assem-
bly with new fasteners.
Seat (with front side
air bag)REPLACE front seat-
back assembly.1. Visually check the seat on the collision side.
2. Remove the seat on the collision side and check the following for damage and
deformities.
–Harness, connectors and terminals
–Frame and recliner (for front and rear seat), and also adjuster and slides (for front
seat)
3. If no damage is found, reinstall the seat.
4. If damaged—REPLACE the damaged seat parts using new fasteners. If the front
seat back is damaged, the front seat back assembly must be replaced.
Center inner pillar 1. Check the center inner pillar on the collision side for damage (dents, cracks, deformation).
2. If damaged—REPAIR the center inner pillar.
Trim/headlining 1. Check for visible signs of damage (dents, cracks, deformation) of the interior trim on the collision side.
2. If damaged—REPLACE the damaged trim parts.

TF-1
TRANSFER
D DRIVELINE/AXLE
CONTENTS
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SECTION TF
A
B
TF
Revision: August 20072004 QX56 PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 7
PRECAUTIONS .......................................................... 8
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 8
Precautions .............................................................. 8
Service Notice .......................................................... 9
Wiring Diagrams and Trouble Diagnosis .................. 9
ALL-MODE 4WD SYSTEM ...................................... 10
Cross-sectional View .............................................. 10
Control System ........................................................11
ALL-MODE 4WD TRANSFER BASIC CONTROL
... 12
HYDRAULIC CONTROL CIRCUITS ................... 12
OUTLINE ............................................................. 12
CONTROL SYSTEM DIAGRAM ......................... 13
INDICATIONS OF 4WD WARNING LAMP ......... 13
CAN Communication .............................................. 13
SYSTEM DESCRIPTION .................................... 13
Location of Electrical Parts ..................................... 14
Description of Electrical Parts ................................ 15
TRANSFER MOTOR .......................................... 15
WAIT DETECTION SWITCH .............................. 15
2-4WD SHIFT SOLENOID VALVE ...................... 15
LINE PRESSURE SWITCH ................................ 16
Circuit Diagram for Quick Pinpoint Check .............. 17
Wiring Diagram — T/F — ....................................... 18
ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION .......................................................................... 27
Trouble Diagnosis without CONSULT-II ................. 27
DESCRIPTION .................................................... 27
SELF-DIAGNOSTIC PROCEDURE .................... 28
INDICATIONS OF 4WD WARNING LAMP ......... 28CONSULT-II Function (ALL MODE AWD/4WD) ..... 31
Trouble Diagnosis with CONSULT-II ...................... 31
SELF-DIAGNOSIS .............................................. 31
SELF-DIAGNOSTIC ITEMS ................................ 32
DATA MONITOR ................................................. 34
DATA MONITOR ITEMS ..................................... 35
REFERENCE VALUE IN DATA MONITOR MODE
... 38
WORK SUPPORT ............................................... 41
CLUTCH FORCE RELEASE LIMIT ADJUST-
MENT .................................................................. 42
TROUBLE DIAGNOSIS — INTRODUCTION ........... 44
Introduction ............................................................. 44
DESCRIPTION .................................................... 44
DIAGNOSTIC WORKSHEET .............................. 44
Work Flow ............................................................... 46
HOW TO PERFORM TROUBLE DIAGNOSES
FOR QUICK AND ACCURATE REPAIR ............. 46
TROUBLE DIAGNOSIS — BASIC INSPECTION .... 47
Listen to Customer Complaints .............................. 47
Transfer Fluid Check .............................................. 47
Road Test ............................................................... 47
PREPARATION FOR ROAD TEST ..................... 47
1. CHECK BEFORE ENGINE IS STARTED ....... 48
2. CHECK AT IDLE .............................................. 49
3. CRUISE TEST ................................................. 53
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION .......................................................................... 55
Transfer Control Unit Terminals and Reference
Value ....................................................................... 55
TRANSFER CONTROL UNIT HARNESS CON-
NECTOR LAYOUT .............................................. 55
TRANSFER CONTROL UNIT INSPECTION
TABLE ................................................................. 55
DTC U1000, U1001 CAN COMMUNICATION LINE ... 59
CAN Communication System Inspection ................ 59
4WD SOLENOID VALVE .......................................... 60
Diagnostic Procedure ............................................. 60
2-4WD SHIFT SOLENOID VALVE AND 4WD SHIFT

TF-8
PRECAUTIONS
Revision: August 20072004 QX56
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EDS0017J
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 NIN G:

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.
PrecautionsEDS0017K

Before connecting or disconnecting the transfer control
unit harness connector, turn ignition switch OFF and dis-
connect negative battery terminal. Failure to do so may
damage the transfer control unit. Because battery voltage is
applied to transfer control unit even if ignition switch is
turned off.

When connecting or disconnecting pin connectors into or
from transfer control unit, take care not to damage pin ter-
minals (bend or break).
Make sure that there are not any bends or breaks on trans-
fer control unit pin terminal, when connecting pin connec-
tors.

Before replacing transfer control unit, perform transfer con-
trol unit input/output signal inspection and make sure
whether transfer control unit functions properly or not. (See
page TF-55
.)
SEF 2 89 H
SEF 2 91 H
MEF040DB

WW-1
WIPER, WASHER & HORN
K ELECTRICAL
CONTENTS
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SECTION WW
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Revision: August 20072004 QX56 PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
FRONT WIPER AND WASHER SYSTEM .................. 4
Components Parts and Harness Connector Loca-
tion ........................................................................... 4
System Description .................................................. 4
LOW SPEED WIPER OPERATION ...................... 5
HI SPEED WIPER OPERATION ........................... 5
INTERMITTENT OPERATION .............................. 5
AUTO STOP OPERATION .................................... 6
FRONT WASHER OPERATION ........................... 6
MIST OPERATION ................................................ 6
FAIL-SAFE FUNCTION ......................................... 6
COMBINATION SWITCH READING FUNCTION ..... 7
CAN Communication System Description ................ 7
Schematic ................................................................ 8
Wiring Diagram — WIPER — .................................. 9
Terminals and Reference Values for BCM ............. 12
Terminals and Reference Values for IPDM E/R ..... 13
Work Flow .............................................................. 13
Preliminary Inspection ............................................ 13
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT ............................................. 13
CONSULT-II Function (BCM) ................................. 15
CONSULT-II OPERATION .................................. 15
DATA MONITOR ................................................. 16
ACTIVE TEST ..................................................... 17
CONSULT-II Function (IPDM E/R) ......................... 17
CONSULT-II OPERATION .................................. 17
DATA MONITOR ................................................. 18
ACTIVE TEST ..................................................... 19
Trouble Diagnosis .................................................. 19
FRONT WIPER DOES NOT OPERATE ............. 19
FRONT WIPER STOP POSITION IS INCOR-
RECT .................................................................. 22
ONLY FRONT WIPER LOW DOES NOT OPER-
ATE ..................................................................... 23ONLY FRONT WIPER HI DOES NOT OPERATE ... 25
ONLY FRONT WIPER INT DOES NOT OPER-
ATE ...................................................................... 26
FRONT WIPER INTERMITTENT OPERATION
SWITCH POSITION CANNOT BE ADJUSTED ... 27
WIPERS DO NOT WIPE WHEN FRONT
WASHER OPERATES ........................................ 27
FRONT WIPERS OPERATE FOR 10 SECONDS,
STOP FOR 20 SECONDS, AND AFTER
REPEATING THIS OPERATION FIVE TIMES,
THEY BECOME INOPERATIVE ......................... 27
Removal and Installation of Front Wiper Arms,
Adjustment of Wiper Arms Stop Location ............... 29
REMOVAL ........................................................... 29
INSTALLATION ................................................... 29
Removal and Installation of Wiper Motor and Link-
age .......................................................................... 29
REMOVAL ........................................................... 29
INSTALLATION ................................................... 30
Washer Nozzle Adjustment .................................... 30
Washer Tube Layout .............................................. 31
Removal and Installation of Wiper and Washer
Switch ..................................................................... 31
REMOVAL ........................................................... 31
INSTALLATION ................................................... 31
Removal and Installation of Washer Tank .............. 31
REMOVAL ........................................................... 31
INSTALLATION ................................................... 32
Removal and Installation of Washer Motor ............. 32
REAR WIPER AND WASHER SYSTEM .................. 33
Components Parts and Harness Connector Loca-
tion .......................................................................... 33
System Description ................................................. 33
REAR WIPER OPERATION ................................ 33
INTERMITTENT OPERATION ............................ 34
AUTO STOP OPERATION .................................. 35
REAR WASHER OPERATION ............................ 35
BCM WIPER SWITCH READING FUNCTION .... 36
Wiring Diagram — WIP/R — .................................. 37
Terminals and Reference Values for BCM .............. 39

PRECAUTION
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Revision: August 20072004 QX56
PRECAUTION PFP:00011
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EKS007F3
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.
Wiring Diagrams and Trouble Diagnosis EKS007F4
When you read wiring diagrams, refer to the following:

Refer to GI-15, "How to Read Wiring Diagrams" .

Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit.
When you perform trouble diagnosis, refer to the following:

Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" .

Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" .