service INFINITI QX4 2005 Factory Service Manual

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AUTOMATIC DRIVE POSITIONER
Revision: October 20052005 QX56
Sliding Motor Circuit InspectionEIS004XR
1. CHECK SEAT SLIDING MECHANISM
Check the following.

Operation malfunction caused by sliding rail deformation, pinched harness or other foreign materials

Operation malfunction caused by foreign materials adhered to the sliding motor LH or sliding rail connec-
tor rod

Operation malfunction and interference with other parts by poor installation
OK or NG
OK >> GO TO 2.
NG >> Repair or replace the malfunctioning part and check again.
2. CHECK FUNCTION
With CONSULT-II
Check operation with “SEAT SLIDE” in ACTIVE TEST.
Without CONSULT-II
GO TO 3.
OK or NG
OK >> Sliding motor circuit is OK.
NG >> GO TO 3.
3. CHECK SLIDING MOTOR CIRCUIT HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect driver seat control unit and sliding motor LH.
3. Check continuity between driver seat control unit connector P3
terminals 35, 42 and sliding motor connector P4 terminals 4, 6.
4. Check continuity between driver seat control unit connector P3
terminals 35, 42 and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace harness.
Only door mirror system does not operate (only auto-
matic operation).1. Door mirror sensor power supply and ground circuit
inspectionSE-81
Only seat system does not operate (only manual opera-
tion).1. Power seat switch ground circuit inspectionSE-71
SymptomDiagnoses / service procedure Refer to
page
Test item Description
SEAT SLIDE The sliding motor is activated by receiving the drive signal.
PIIA0265E
35 (V/W) - 6 (V/W) : Continuity should exist.
42 (O/B) - 4 (O/B) : Continuity should exist.
35 (V/W) - Ground : Continuity should not exist.
42 (O/B) - Ground : Continuity should not exist.
LIIA0696E

SRS-1
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
H RESTRAINTS
CONTENTS
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SRS
Revision: October 20052005 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) .............. 31
DIAGNOSTIC PROCEDURE 5 ........................... 31
Trouble Diagnosis Without CONSULT-II ................. 38
DIAGNOSTIC PROCEDURE 6 ........................... 38
WARNING LAMP FLASH CODE CHART ........... 39
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn Off ............................................................ 44
DIAGNOSTIC PROCEDURE 6 ........................... 44
Trouble Diagnosis: “AIR BAG” Warning Lamp Does
Not Turn On ............................................................ 45
DIAGNOSTIC PROCEDURE 7 ........................... 45
DRIVER AIR BAG MODULE .................................... 46
Removal and Installation ........................................ 46
REMOVAL ........................................................... 46
INSTALLATION ................................................... 47
SPIRAL CABLE ........................................................ 48
Removal and Installation ........................................ 48
REMOVAL ........................................................... 48
INSTALLATION ................................................... 49
FRONT PASSENGER AIR BAG MODULE .............. 51
Removal and Installation ........................................ 51
REMOVAL ........................................................... 51
INSTALLATION ................................................... 51
WIRING HARNESS MODIFICATION .................. 52
SIDE CURTAIN AIR BAG MODULE ........................ 54
Removal and Installation ........................................ 54
REMOVAL ........................................................... 54
INSTALLATION ................................................... 54
CRASH ZONE SENSOR ........................................... 56
Removal and Installation ........................................ 56
REMOVAL ........................................................... 56
INSTALLATION ................................................... 56
SIDE AIR BAG (SATELLITE) SENSOR ................... 57
Removal and Installation ........................................ 57
REMOVAL ........................................................... 57
INSTALLATION ................................................... 57
FRONT SEAT BELT PRE-TENSIONER ................... 58
Removal and Installation ........................................ 58

PRECAUTIONS
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PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EHS0016A
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” ServiceEHS0016B

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 bags and seat belt
pre-tensioners to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes
have passed.

The air 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 PrecautionEHS0016C
Replace control unit and passenger front seat cushion as an assembly.
Trouble Diagnosis PrecautionEHS0016D
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.

SRS-4
PREPARATION
Revision: October 20052005 QX56
PREPARATIONPFP:00002
Special Service ToolsEHS0016E
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsEHS0016F
Tool number
(Kent-Moore No.)
Tool nameDescription
—
(J-42057)
Air bag lock master key setRemoving and installing air bag lock
LRS210
Tool name
(Kent-Moore No.)Description
Steering wheel puller
(J-1859A)Removing steering wheel
Steering wheel puller legs
(J-42578)Removing steering wheel
LHIA0043E
LHIA0044E

SRS-8
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
TROUBLE DIAGNOSISPFP:00004
Trouble Diagnosis IntroductionEHS0016M
CAUTION:

Do not use electrical test equipment on any circuit related to the SRS unless instructed to do so in
this Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harness con-
nectors.

Do not attempt to repair, splice or modify SRS wiring harnesses. If a harness is damaged, replace
it with a new one.

Keep ground connections clean.
DIAGNOSIS FUNCTION
The SRS self-diagnosis results can be read by using “AIR BAG” warning lamp and/or CONSULT-II.
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” warning lamp and CONSULT-II are as follows:
HOW TO PERFORM TROUBLE DIAGNOSES 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 malfunction. 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
Check that the following parts are in good order.

Battery (Refer to SC-4, "How to Handle Battery" .)

Fuse (Refer to SRS-12, "Wiring Diagram— SRS —" .)

System component-to-harness connections
User mode Diagnosis mode Display type
“AIR BAG” warning lamp X X ON-OFF operation
CONSULT-II — X Monitoring

FRONT PASSENGER AIR BAG MODULE
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Revision: October 20052005 QX56
FRONT PASSENGER AIR BAG MODULEPFP:K8515
Removal and InstallationEHS0016Z
The passenger air bag module originally installed in the vehicle uses direct-connect style harness connectors.
Service replacement passenger air bag modules use tab-locking style harness connectors. If the passenger
air bag module is replaced or if the direct-connect harness connectors are damaged, the vehicle wiring har-
ness must be modified to allow connection of the service replacement passenger air bag module. Refer to
SRS-52, "
WIRING HARNESS MODIFICATION" for wiring harness modification procedure.
REMOVAL
CAUTION:

Do not attempt to repair or replace damaged direct-connect front passenger air bag module con-
nectors. If a direct-connect harness connector is damaged, the front passenger air bag must be
replaced and the wiring harness modified.

Before servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least
3 minutes.

Always work from the side of or under front passenger air bag module.
1. Remove the glove box. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
2. Remove 2 nuts (through glove box opening) retaining front pas-
senger air bag module to instrument panel crossmember.
3. Disconnect the air bag module electrical connectors.

For removal/installation of the direct-connect SRS connec-
tors, refer to SRS-7, "
Direct-connect SRS Component Con-
nectors" .
4. Remove the instrument panel assembly from the vehicle. Refer
to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
5. Remove front passenger air bag module nuts and remove air
bag module from the instrument panel assembly.
CAUTION:

When servicing the SRS, do not work from directly in front
of air bag module.

Always place front passenger air bag module with caution
label side facing upward.

Do not insert any foreign objects (screwdriver, etc.) into air
bag module or harness connectors.

Do not disassemble air bag module.

Do not use old nuts after removal; replace with new nuts.

Do not expose the front passenger air bag module to tem-
peratures exceeding 90°C (194°F).

Replace the air bag module if it has been dropped or sus-
tained an impact.

Do not allow oil, grease or water to come in contact with the
air bag module.

For removal/installation of the direct-connect SRS connec-
tors, refer to SRS-7, "
Direct-connect SRS Component Con-
nectors" .
INSTALLATION
Original Passenger Air Bag Module
To install, reverse the removal procedure.
WHIA0110E
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SBF 8 14 E

SRS-52
FRONT PASSENGER AIR BAG MODULE
Revision: October 20052005 QX56

For removal/installation of the direct-connect SRS connectors, refer to SRS-7, "Direct-connect SRS Com-
ponent Connectors" .
CAUTION:

Always work from the side of or under front passenger air bag module.

After the work is completed, perform self-diagnosis to check that no malfunction is detected.
Refer to SRS-20, "
SRS Operation Check" .
Service Replacement Passenger Air Bag Module
1. Install the front passenger air bag module to the instrument
panel pad assembly.
2. Install the instrument panel assembly. Refer to IP-10, "
INSTRUMENT PANEL ASSEMBLY" .
3. Connect the front passenger air bag module harness connector to yellow 4-pin service replacement air
bag connector and fasten connector to mounting bracket.
CAUTION:

Always work from the side of or under front passenger air bag module.

After the work is completed, perform self-diagnosis to check that no malfunction is detected.
Refer to SRS-20, "
SRS Operation Check" .
WIRING HARNESS MODIFICATION
The passenger air bag module originally installed in the vehicle uses direct-connect style harness connectors.
Service replacement passenger air bag modules use tab-locking style harness connectors. If the passenger
air bag module is replaced or if the direct-connect harness connectors are damaged, the vehicle wiring har-
ness must be modified to allow connection of the service replacement passenger air bag module.
NOTE:
The wiring harness modification is to be performed only if the vehicle is equipped with the original passenger
air bag which uses direct-connect harness connectors. If the passenger air bag is to be replaced in a vehicle
that has already had the service replacement passenger air bag installed, the wiring harness modification is
not required.
CAUTION:

Do not attempt to repair or replace damaged direct-connect front passenger air bag module con-
nectors. If a direct-connect harness connector is damaged, the front passenger air bag must be
replaced and the wiring harness modified.

Before servicing SRS, turn the ignition switch off, disconnect both battery cables and wait at least
3 minutes.

Always work from the side of or under front passenger air bag module.

After the work is completed, perform self-diagnosis to check that no malfunction is detected.
Refer to SRS-20, "
SRS Operation Check" .
1. Locate the yellow and orange direct-connect passenger air bag module harness connectors.
2. Use wire cutters to cut back both previously used direct-connect passenger air bag module harness con-
nectors from the vehicle wiring harness approximately 50 mm (1.9 in) from the connectors.
3. Remove approximately 150 mm (5.9 in) of the vehicle harness covering from the cut end.
WHIA0110E

FRONT PASSENGER AIR BAG MODULE
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4. Slide a piece of dual-wall heat shrink tubing (provided in the pas-
senger air bag service kit) onto each wire of the previously used
vehicle wiring harness.
5. Fold each wire back and insert into the end of the heat shrink
tubing so that the end of the wire is approximately centered in
the heat shrink tubing.
6. Use a heat gun to shrink the heat shrink tubing and seal the wire.
7. Use electrical tape to secure the modified circuits to the outside of the wiring harness.
8. Locate the front passenger air bag service replacement connec-
tor that is taped back to the main harness. Unwrap the tape to
access the yellow service replacement connector and remove
the dust cover from the connector.
LHIA0017E
WHIA0062E
WHIA0118E

TF-1
TRANSFER
D DRIVELINE/AXLE
CONTENTS
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SECTION TF
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TF
Revision: October 20052005 QX56 PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for Transfer Assembly and Transfer
Control Unit Replacement ........................................ 4
METHOD FOR POSITION ADJUSTMENT ........... 4
Precautions .............................................................. 4
Service Notice .......................................................... 5
Wiring Diagrams and Trouble Diagnosis .................. 5
PREPARATION ........................................................... 6
Special Service Tools ............................................... 6
Commercial Service Tools ........................................ 9
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING .............................................. 10
NVH Troubleshooting Chart ................................... 10
TRANSFER FLUID ....................................................11
Replacement ...........................................................11
DRAINING ............................................................11
FILLING ................................................................11
Inspection ................................................................11
FLUID LEAKAGE AND FLUID LEVEL .................11
ALL-MODE 4WD SYSTEM ...................................... 12
Cross-section View ................................................ 12
Power Transfer ....................................................... 13
POWER TRANSFER DIAGRAM ........................ 13
POWER TRANSFER FLOW ............................... 14
System Description ................................................ 15
CONTROL SYSTEM ........................................... 15
TRANSFER MOTOR .......................................... 16
WAIT DETECTION SWITCH .............................. 17
NEUTRAL-4LO SWITCH .................................... 17
ATP SWITCH ...................................................... 17
2-4WD SHIFT SOLENOID VALVE ...................... 17
CLUTCH PRESSURE SOLENOID VALVE ......... 17
LINE PRESSURE SWITCH ................................ 18
CLUTCH PRESSURE SWITCH .......................... 18
TRANSFER FLUID TEMPERATURE SENSOR ... 18
TRANSFER CONTROL UNIT ............................. 18
TRANSFER CONTROL DEVICE ........................ 184WD SHIFT SWITCH AND INDICATOR LAMP ... 18
4WD WARNING LAMP ....................................... 19
ATP WARNING LAMP ......................................... 19
System Diagram ..................................................... 19
COMPONENTS FUNCTION ............................... 20
CAN Communication .............................................. 20
SYSTEM DESCRIPTION .................................... 20
TROUBLE DIAGNOSIS ............................................ 21
How to Perform Trouble Diagnosis ......................... 21
BASIC CONCEPT ............................................... 21
Location of Electrical Parts ..................................... 22
Circuit Diagram ....................................................... 23
Wiring Diagram — T/F — ....................................... 24
Inspections Before Trouble Diagnosis .................... 32
TRANSFER FLUID CHECK ................................ 32
PREPARATION FOR ROAD TEST ..................... 32
CHECK BEFORE ENGINE IS STARTED ........... 32
CHECK AT IDLE .................................................. 32
CRUISE TEST ..................................................... 34
Trouble Diagnosis Chart for Symptoms .................. 34
Transfer Control Unit Input/Output Signal Refer-
ence Values ............................................................ 36
TRANSFER CONTROL UNIT INSPECTION
TABLE ................................................................. 36
CONSULT-II Function (ALL MODE AWD/4WD) ..... 44
FUNCTION .......................................................... 44
CONSULT-II SETTING PROCEDURE ................ 44
SELF-DIAG RESULT MODE ............................... 45
DATA MONITOR MODE ...................................... 47
WORK SUPPORT ............................................... 49
Self-diagnostic Procedure ...................................... 50
SELF-DIAGNOSTIC PROCEDURE (WITH
CONSULT-II) ....................................................... 50
SELF-DIAGNOSTIC PROCEDURE (WITHOUT
CONSULT-II) ....................................................... 50
ERASE SELF-DIAGNOSIS ................................. 53
TROUBLE DIAGNOSIS FOR SYSTEM .................... 54
Power Supply Circuit For Transfer Control Unit ...... 54
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ................................................ 54

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Revision: October 20052005 QX56 DIAGNOSTIC PROCEDURE ............................. 117
4WD Warning Lamp Does Not Turn ON .............. 121
SYMPTOM: ....................................................... 121
DIAGNOSTIC PROCEDURE ............................ 121
4WD Shift Indicator Lamp or 4LO Indicator Lamp
Does Not Change ................................................. 123
SYMPTOM: ....................................................... 123
DIAGNOSTIC PROCEDURE ............................ 124
ATP Warning Lamp Turns ON .............................. 125
SYMPTOM: ....................................................... 125
DIAGNOSTIC PROCEDURE ............................ 125
4LO Indicator Lamp Repeats Flashing ................. 127
SYMPTOM: ....................................................... 127
DIAGNOSTIC PROCEDURE ............................ 127
4WD Warning Lamp Flashes Rapidly .................. 128
SYMPTOM: ....................................................... 128
DIAGNOSTIC PROCEDURE ............................ 128
4WD Warning Lamp Flashes Slowly .................... 129
SYMPTOM: ....................................................... 129
DIAGNOSTIC PROCEDURE ............................ 129
Heavy Tight-corner Braking Symptom Occurs ..... 130
SYMPTOM: ....................................................... 130
DIAGNOSTIC PROCEDURE ............................ 130
4WD System Does Not Operate .......................... 131
SYMPTOM: ....................................................... 131
DIAGNOSTIC PROCEDURE ............................ 131
TRANSFER CONTROL UNIT ................................. 132
Removal and Installation ...................................... 132
REMOVAL ......................................................... 132
INSTALLATION ................................................. 132
FRONT OIL SEAL .................................................. 133
Removal and Installation ...................................... 133
REMOVAL ......................................................... 133
INSTALLATION ................................................. 134
REAR OIL SEAL .................................................... 135
Removal and Installation ...................................... 135
REMOVAL ......................................................... 135
INSTALLATION ................................................. 135SIDE OIL SEAL .......................................................137
Removal and Installation ......................................137
REMOVAL .........................................................137
INSTALLATION .................................................137
TRANSFER CONTROL DEVICE ............................138
Removal and Installation ......................................138
AIR BREATHER HOSE ..........................................139
Removal and Installation ......................................139
TRANSFER MOTOR ...............................................140
Removal and Installation ......................................140
REMOVAL .........................................................140
INSTALLATION .................................................140
TRANSFER OIL FILTER .........................................141
Removal and Installation ......................................141
REMOVAL .........................................................141
INSTALLATION .................................................141
TRANSFER ASSEMBLY ........................................143
Removal and Installation ......................................143
REMOVAL .........................................................143
INSTALLATION .................................................143
Disassembly and Assembly ..................................144
COMPONENTS .................................................144
DISASSEMBLY .................................................146
INSPECTION AFTER DISASSEMBLY ..............161
ASSEMBLY .......................................................165
SERVICE DATA AND SPECIFICATIONS (SDS) ....181
General Specifications ..........................................181
Inspection and Adjustment ...................................181
CLEARANCE BETWEEN INNER GEAR AND
OUTER GEAR ...................................................181
CLUTCH ............................................................181
PINION GEAR END PLAY ................................181
CLEARANCE BETWEEN SHIFT FORK AND
SLEEVE ............................................................181
SELECTIVE PARTS ..........................................181