differential INFINITI QX56 2004 Factory Owner's Manual

FSU-4
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEES0010G
Use the chart below to help you find the cause of the symptom. Repair or replace parts as necessary.
x: ApplicableReference page
FSU-5FSU-10FSU-5FSU-5FSU-21FSU-6FSU-6FSU-6
PR-3, "
NVH Troubleshooting Chart
"
FFD-7, "
NVH Troubleshooting Chart
"
FAX -4, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible Cause and
SUSPECTED PARTS
Improper installation, looseness
Shock absorber deformation,
damage or deflection
Bushing or mounting deterioration
Parts interference
Spring fatigue
Suspension looseness
Incorrect wheel alignment
Stabilizer bar fatigue
PROPELLER SHAFT
DIFFERENTIAL
AXLE
TIRES
ROAD WHEEL
BRAKES
STEERING
SymptomNoise× × ×××× × × × × × ××
Shake×××× × × ×××××
Vib ratio n××××× × ×× ×
Shimmy× × ×× × × × × ××
Shudder××× ×××××
Poor quality ride or handling××××× ×× ×××

TERMINOLOGY
GI-51
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GI
Revision: August 20072004 QX56
Exhaust gas recirculation control-BPT
valveEGRC-BPT valve BPT valve
Exhaust gas recirculation control-solenoid
valveEGRC-solenoid valve EGR control solenoid valve
Exhaust gas recirculation temperature sen-
sor
EGRT sensor Exhaust gas temperature sensor
EGR temperature sensor
Flash electrically erasable programmable
read only memoryFEEPROM ***
Flash erasable programmable read only
memoryFEPROM ***
Flexible fuel sensor FFS ***
Flexible fuel system FF system ***
Fuel pressure regulator *** Pressure regulator
Fuel pressure regulator control solenoid
valve*** PRVR control solenoid valve
Fuel trim FT ***
Heated Oxygen sensor HO2S Exhaust gas sensor
Idle air control system IAC system Idle speed control
Idle air control valve-air regulator IACV-air regulator Air regulator
Idle air control valve-auxiliary air control
valveIACV-AAC valve Auxiliary air control (AAC) valve
Idle air control valve-FICD solenoid valve IACV-FICD solenoid valve FICD solenoid valve
Idle air control valve-idle up control sole-
noid valveIACV-idle up control solenoid valve Idle up control solenoid valve
Idle speed control-FI pot ISC-FI pot FI pot
Idle speed control system ISC system ***
Ignition control IC ***
Ignition control module ICM ***
Indirect fuel injection system IFI system ***
Intake air IA Air
Intake air temperature sensor IAT sensor Air temperature sensor
Knock *** Detonation
Knock sensor KS Detonation sensor
Malfunction indicator lamp MIL Check engine light
Manifold absolute pressure MAP ***
Manifold absolute pressure sensor MAPS ***
Manifold differential pressure MDP ***
Manifold differential pressure sensor MDPS ***
Manifold surface temperature MST ***
Manifold surface temperature sensor MSTS ***
Manifold vacuum zone MVZ ***
Manifold vacuum zone sensor MVZS ***
Mass air flow sensor MAFS Air flow meter
Mixture control solenoid valve MC solenoid valve Air-fuel ratio control solenoid valve
Multiport fuel injection System MFI system Fuel injection controlNEW TERMNEW ACRONYM /
ABBREVIATIONOLD TERM

IDX-3
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IDX
ALPHABETICAL INDEX
Brake lines and cables inspection ..................... MA-27
Brake master cylinder ....................................... BR-15
Brake switch .................................................... EC-551
BRK/SW - Wiring diagram ............................... EC-552
Bulb specifications ........................................... LT-170
Bumper, front ...................................................... EI-13
Bumper, rear ....................................................... EI-15
C
Cabin air filter .................................................... MA-20
Camshaft ........................................................... EM-43
Camshaft inspection .......................................... EM-47
Camshaft position sensor (PHASE) ................ EC-261
CAN - Wiring diagram EC-136, LAN-18, LAN-52, LAN-
92, LAN-128
CAN (Controller Area Network) .. WT-9, BRC-10, LAN-
16, LAN-50, LAN-90, LAN-126
CAN communication . EC-31, EC-135, AT-103, WT-9,
BRC-10
, LAN-16, LAN-50, LAN-90, LAN-126
Canister-See EVAP canister ........................... EC-636
Center case (Transfer) ..................................... TF-113
CHARGE - Wiring diagram ............................... SC-18
Charging system ............................................... SC-17
Chassis and body maintenance ........................ MA-20
Chassis and body maintenanceSchedule 1 ........ MA-7
Chassis and body maintenanceSchedule 2 ........ MA-9
CHIME - Wiring diagram ..................................... DI-46
Circuit breaker ................................................... PG-67
Clock ................................................................... DI-70
CLOCK - Wiring diagram .................................... DI-70
Closed loop control ........................................... EC-27
Closed loop control (Bank 1) ........................... EC-407
Closed loop control (Bank 2) ........................... EC-407
Clutch drum (Transfer) ..................................... TF-116
Clutch force release limit adjustment ................. TF-42
Clutch pressure switch (Transfer) ...................... TF-95
Coil spring (front) ............................................. FSU-10
Collision diagnosis .......................................... SRS-60
Combination lamp, front, removal and installation . LT-
33
Combination lamp, rear, removal and installation .. LT-
122
Combination meter ................................................ DI-5
Combination switch ............................................ LT-97
COMBSW - Wiring diagram ............................... LT-97
COMM - Wiring diagram ................................... AV-87
COMPAS - Wiring diagram ................................. DI-27
Compass ............................................................. DI-26
Component Location (auto A/C) ...................... ATC-37
Compressor clutch removal and installation . ATC-167
Compressor mounting ................................... ATC-166
Compressor precaution ................................... ATC-11
Compressor special service tool ..................... ATC-14
Condenser ..................................................... ATC-173
Connecting rod .................................................. EM-91
Connecting rod bearing clearance .................... EM-91
Connecting rod bushing clearance .................... EM-91
Console box - See Instrument panel ................... IP-10
Console box lamp ............................................. LT-152
CONSULT for all-mode 4WD ............................. TF-31
CONSULT for VDC ......................................... BRC-28
CONSULT-II for engine ................................... EC-103
Control units (terminal arrangement) ................. PG-71
Control valve (A/T) ............................................. AT-37
Control valve (Transfer) .................................... TF-119
Controller Area Network (CAN) . WT-9, BRC-10, LAN-
16, LAN-50, LAN-90, LAN-126
Converter housing installation ............ AT-257, AT-260
COOL/F - Wiring diagram ................................ EC-413
Coolant mixture ratio ......................................... MA-11
Coolant replacement ......................................... MA-12
Cooling circuit (engine) ........................................ CO-6
Cooling fan ........................................................ CO-13
Cooling fan control ........................................... EC-410
Cooling fan motor ............................................ EC-419
Cooling unit (A/C evaporator) ....... ATC-144, ATC-175
Corrosion protection ......................................... BL-167
Crankcase ventilation system - See Positive crankcase
ventilation ........................................................ EC-645
Crankshaft ......................................................... EM-74
Crankshaft position sensor (POS) ................... EC-255
Crash zone sensor .......................................... SRS-55
Cylinder block .................................................... EM-73
Cylinder block boring ......................................... EM-94
D
D/LOCK - Wiring diagram ................................... BL-20
Data link connector .......................................... EC-105
Daytime light system .......................................... LT-34
Daytime running light - See Daytime light system .. LT-
34
DEF - Wiring diagram ....................................... GW-82
Diagnosis sensor unit ...................................... SRS-58
Diagnostic trouble code (DTC) .......................... EC-53
Diagnostic trouble code (DTC) for OBD system .. EC-8
Diagnostic trouble code (DTC) inspection priority chart
EC-76
Differential carrier assembly ............................ RFD-11
Differential carrier disassembly ....................... RFD-13
Differential gear oil replacement ........................ MA-25
Dimensions ......................................................... GI-49
Direct clutch solenoid valve ................ AT-157, AT-160
Display and amp.assembly .............................. ATC-60
Display Control Unit ......................................... AV-158
Dome light - See Interior lamp .......................... LT-129
Door glass .......................................... GW-69, GW-72
Door lock .......................................................... BL-132
Door mirror lamp ............................................... LT-129
Door trim .............................................................. EI-31
Door, front ........................................... BL-129, GW-69
Door, rear ........................................... BL-129, GW-72
Drive belt ........................................................... EM-12
Drive chain (Transfer) ....................................... TF-115
Drive pinion diff. inspection .............................. RFD-12
Drive pinion height ........................................... RFD-17
Drive shaft (rear) ................................................ RAX-7

NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
PR-3
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PR
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS002JY
Use the chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
PR-4
(front)
PR-8 (rear)
PR-4 (front)
PR-8 (rear)
PR-4 (front)
PR-8 (rear)
FFD-7, "
NVH Troubleshooting Chart
" (front)
RFD-5, "
NVH Troubleshooting Chart
" (rear)
FA X-4, "
NVH Troubleshooting Chart
" (front)
RAX-4, "
NVH Troubleshooting Chart
" (rear)
FSU-4, "
NVH Troubleshooting Chart
" (front)
RSU-5, "
NVH Troubleshooting Chart
" (rear)
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
FA X-4, "
NVH Troubleshooting Chart
" (front)
RAX-4, "
NVH Troubleshooting Chart
" (rear)
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and suspected parts
Uneven rotation torque
Rotation imbalance
Excessive run out
Differential
Axle
Suspension
Tire s
Road wheel
Drive shaft
Brakes
Steering
SymptomNoise×××××××××××
Shake×××××××
Vibration××× ××× × ×

RAX-4
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
Revision: August 20072004 QX56
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTINGPFP:00003
NVH Troubleshooting ChartEDS001AS
Use chart below to help you find the cause of the symptom. If necessary, repair or replace these parts.
×: ApplicableReference page
—
RAX-8—
RAX-5—
RFD-5, "
NVH Troubleshooting Chart
"
FAX -4, "
NVH Troubleshooting Chart
" (FAX), FSU-4, "
NVH Troubleshooting Chart
" (FSU)
RSU-5, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
WT-3, "
NVH Troubleshooting Chart
"
PR-3, "
NVH Troubleshooting Chart
"
BR-5, "
NVH Troubleshooting Chart
"
PS-5, "
NVH Troubleshooting Chart
"
Possible cause and SUSPECTED PARTS
Excessive joint angle
Joint sliding resistance
Imbalance
Improper installation, looseness
Parts interference
DIFFERENTIAL
FRONT AXLE AND FRONT SUSPENSION
REAR SUSPENSION
TIRES
ROAD WHEEL
PROPELLER SHAFT
BRAKES
STEERING
SymptomNoise×× ×× ×× ×××××
Shake× × ×× × ×××××
Vibration×× ×× × × × ×
Shimmy×× ×××××
Shudder× × ×× ××
Poor quality ride or handling×× ×× ×× ×

RFD-1
REAR FINAL DRIVE
D DRIVELINE/AXLE
CONTENTS
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SECTION RFD
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B
RFD
Revision: August 20072004 QX56 PREPARATION ........................................................... 2
Special Service Tools ............................................... 2
Commercial Service Tools ........................................ 4
NOISE, VIBRATION, AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 5
NVH Troubleshooting Chart ..................................... 5
FRONT OIL SEAL ...................................................... 6
Removal and Installation .......................................... 6
REMOVAL ............................................................. 6
INSTALLATION ..................................................... 7
SIDE OIL SEAL .......................................................... 8
Removal and Installation .......................................... 8
REMOVAL ............................................................. 8
INSTALLATION ..................................................... 8
REAR FINAL DRIVE ASSEMBLY ............................ 10
Removal and Installation ........................................ 10
REMOVAL ........................................................... 10
INSTALLATION ....................................................11
Components ............................................................11
Pre-Inspection ........................................................ 12
TOTAL PRELOAD ............................................... 12
DRIVE GEAR TO DRIVE PINION BACKLASH ... 12
DRIVE GEAR RUNOUT ...................................... 12
COMPANION FLANGE RUNOUT ...................... 13
TOOTH CONTACT .............................................. 13
Disassembly and Assembly ................................... 13
REMOVAL OF DIFFERENTIAL CASE ASSEM-BLY ...................................................................... 13
REMOVAL OF DRIVE PINION ASSEMBLY ........ 14
DISASSEMBLY OF DIFFERENTIAL CASE
ASSEMBLY ......................................................... 16
INSPECTION ...................................................... 17
ADJUSTMENT OF DIFFERENTIAL CASE ......... 17
SIDE BEARING PRELOAD ................................. 18
TOOTH CONTACT .............................................. 19
ASSEMBLY OF DIFFERENTIAL CASE ASSEM-
BLY ...................................................................... 20
INSTALLATION OF DRIVE PINION ASSEMBLY ... 21
INSTALLATION OF DIFFERENTIAL CASE
ASSEMBLY ......................................................... 23
SERVICE DATA AND SPECIFICATIONS (SDS) ...... 26
General Specifications ............................................ 26
Drive Gear Runout .................................................. 26
Side Gear Adjustment ............................................ 26
AVAILABLE SIDE GEAR THRUST WASHERS ... 26
Drive Pinion Height Adjustment .............................. 26
AVAILABLE PINION HEIGHT ADJUSTING
WASHERS .......................................................... 26
Drive Pinion Preload Adjustment ............................ 26
Side Bearing Preload Adjustment ........................... 27
SIDE BEARING ADJUSTING WASHERS .......... 27
Total Preload Adjustment ........................................ 27

RFD-2
PREPARATION
Revision: August 20072004 QX56
PREPARATIONPFP:00002
Special Service ToolsEDS0 02 JH
The actual shapes of the Kent-Moore tools may differ from those of the special service tools illustrated here.
Tool name
Tool number
(Kent-Moore No.)Description
Drift
ST15310000
(—)

Installing front oil seal

Installing drive pinion rear bearing outer
race.
a: 96 mm (3.77 in) dia.
b: 84 mm (3.30 in) dia.
Drift
ST35271000
(—)Installing side oil seal
a: 72 mm (2.83 in) dia.
b: 63 mm (2.48 in) dia.
Protector
KV38107900
(J-39352)Installing side flange
Attachment
KV38100800
(J-25604-01) Fixing unit assembly
a: 541 mm (21.30 in) dia.
b: 200 mm (7.87 in) dia.
Differential side bearing puller set
ST3306S001
(—)
1.ST33051001
(—)
2.ST33061000
(J-8107-2)Removing side bearing inner race
a: 28.5 mm (1.122 in) dia.
b: 38 mm (1.50 in) dia.
Drift
ST30621000
(—)Installing drive pinion front bearing outer race
a: 79 mm (3.11 in) dia.
b: 59 mm (2.32 in) dia.
ZZA0811D
ZZA1143D
S-NT129
SDIA0267E
NT072
ZZA0810D

PREPARATION
RFD-3
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RFD
Revision: August 20072004 QX56
Drift
KV38100200
(J-26233)Installing side bearing inner race
a: 65 mm (2.55 in) dia.
b: 49 mm (1.92 in) dia.
Drive pinion flange wrench
KV40104000
(—)Removing and installing drive pinion nut
a: 85 mm (3.35 in) dia.
b: 65 mm (2.56 in) dia.
Slide hammer
ST36230000
(J-25840-A)Removing side flange
Axle stand
KV40104100
(—)Removing side flange
Slide hammer
HT72400000
(—)Removing differential case assembly
Drift
ST35325000
(—)Installing drive pinion rear bearing outer race
(use with ST30621000)
Preload gauge
ST3127S000
(J-25765-A)
1. Torque wrench
GG91030000
(J-25765)
2. Socket adapter (1/2 in)
HT62940000
(—)
3. Socket adapter (3/8 in)
HT62900000
(—)Measuring pinion bearing preload and total
preload Tool name
Tool number
(Kent-Moore No.)Description
ZZA1143D
NT659
ZZA0803D
ZZA0804D
S-NT125
S-NT090
NT124

REAR FINAL DRIVE ASSEMBLY
RFD-11
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RFD
Revision: August 20072004 QX56
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
After installation, check the final drive oil level. Refer to MA-24, "
Checking Final Drive Oil" .
ComponentsEDS002JN
R230 2–PINION
WDIA0294E
1. Drive pinion nut 2. Companion flange 3. Front oil seal
4. Pinion front bearing 5. Pinion bearing adjusting spacer (col-
lapsible spacer)6. Pinion rear bearing
7. Pinion height adjusting washer 8. Drive pinion 9. Gear carrier
10. Drive gear 11. Pinion mate shaft 12. Lock pin
13. Pinion mate gear 14. Pinion mate thrust washer 15. Side gear
16. Side gear thrust washer 17. Differential case 18. Side bearing

REAR FINAL DRIVE ASSEMBLY
RFD-13
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RFD
Revision: August 20072004 QX56
COMPANION FLANGE RUNOUT
Mount the dial gauge indicator so the dial gauge needle is positioned
on the propeller shaft mounting surface. Rotate the companion
flange and measure the runout as shown.

If runout is not within specification, remove the companion
flange, rotate 90° in relation to the drive pinion, and install the
companion flange using a new drive pinion nut. Tighten the drive
pinion nut to the minimum specified torque. Final drive pinion nut
torque will be determined when adjusting the total preload. Refer
to RFD-12, "
TOTAL PRELOAD" .
CAUTION:
The drive pinion nut is not reusable. Use a new drive pinion nut for installation.

If runout is not within specification after rotating the companion flange 90° on the drive pinion, replace the
companion flange. Recheck the companion flange runout.

If the new companion flange runout is not within specification, inspect the drive pinion bearing and the
drive pinion. Repair as necessary.
CAUTION:
Clean all of the rust and dirt off of the companion flange surface before measuring the companion
flange runout.
TOOTH CONTACT
Check the tooth contact. Refer to RFD-19, "TOOTH CONTACT" .
Disassembly and AssemblyEDS002JP
REMOVAL OF DIFFERENTIAL CASE ASSEMBLY
1. Use two 45 mm (1.77 in) spacers to mount the gear carrier on
Tool.
2. For installation, paint match marks on one side of the bearing
caps as shown.
NOTE:
Bearing caps are line-bored for initial assembly. Replace the
bearing caps in their original positions.Companion flange runout : 0.08 mm (0.003 in) or less
Tool number : KV40104000 ( — )
Drive pinion nut : 167 - 372 N·m (17 - 38 kg-m,
124 - 274 ft-lb)
WDIA0062E
Tool number : KV38100800 (J-25604–01)
SPD8 88
SPD8 89