Transfer INFINITI QX4 2001 Factory Workshop Manual

SMA848B
Checking Drum BrakeNBMA0033WHEEL CYLINDERNBMA0033S01Check for leakage.
DRUMNBMA0033S02Check condition and inner surface.
Standard inner diameter:
295 mm (11.61 in)
Drum repair limit (Inner diameter):
296.5 mm (11.67 in)
SMA849B
LININGNBMA0033S03Check wear or damage.
Standard thickness:
6.1 mm (0.24 in)
Lining wear limit (Minimum thickness):
1.5 mm (0.059 in)
SMA870C
TEMPORARY METHOD FOR CHECKING LINING WEARNBMA0033S04Remove inspection hole plug and check for lining wear.
SMA874C
Checking Steering Gear, Linkage and Transfer
Gear
NBMA0034STEERING GEARNBMA0034S01ICheck gear housing and boots for looseness, damage and
grease leakage.
ICheck connection with steering column for looseness.
STEERING LINKAGENBMA0034S02ICheck ball joint, dust cover and other component parts for
looseness, wear, damage and grease leakage.
STEERING TRANSFER GEARNBMA0034S03ICheck gear box for looseness, damage and grease leakage.
CHASSIS AND BODY MAINTENANCE
Checking Drum Brake
MA-26

Removal and InstallationNBPD0017REMOVALNBPD0017S01IRemove front of propeller shaft.
Plug front end of transfer.
IRemove drive shaft. Refer to AX-11, ªRemovalº.
IRemove front final drive mounting bolts.
CAUTION:
Be careful not to damage spline, sleeve yoke and front oil seal
when removing propeller shaft.
SPD123
INSTALLATIONNBPD0017S02IFill final drive with recommended gear oil.
SPD664
DisassemblyNBPD0018PRE-INSPECTIONNBPD0018S01Before disassembling final drive, perform the following inspection.
ITotal preload
a) Turn drive pinion in both directions several times to set bear-
ing rollers.
b) Check total preload with Tool.
Tool number: ST3127S000 (J25765-A)
Total preload:
P
1+ [0.3 - 1.5 N´m (3 - 15 kg-cm, 2.6 - 13.0 in-lb)]
P
1: Drive pinion preload
SPD513
IRing gear to drive pinion backlash
Check backlash of ring gear with a dial indicator at several
points.
Ring gear-to-drive pinion backlash:
0.10 - 0.15 mm (0.0039 - 0.0059 in)
FRONT FINAL DRIVER200A
Removal and Installation
PD-18

Removal and InstallationNBPD0032REMOVALNBPD0032S01IRemove rear of propeller shaft.
Plug front end of transfer.
IRemove axle shaft.
Refer to AX-19, ªRemovalº.
IRemove rear final drive mounting bolts.
CAUTION:
Be careful not to damage spline, sleeve yoke and front oil seal
when removing propeller shaft.
SPD123
INSTALLATIONNBPD0032S02IFill final drive with recommended gear oil.
SPD767
IPay attention to the direction of gasket.
SPD149
DisassemblyNBPD0033PRE-INSPECTIONNBPD0033S01Before disassembling final drive, perform the following inspection.
ITotal preload
a) Turn drive pinion in both directions several times to seat bear-
ing rollers correctly.
b) Check total preload with Tool.
Tool number: ST3127S000 (J25765-A)
Total preload:
1.2 - 2.0 N´m (12 - 20 kg-cm, 10 - 17 in-lb)
SPD246
IRing gear to drive pinion backlash
Check backlash of ring gear with a dial indicator at several
points.
Ring gear-to-drive pinion backlash:
0.13 - 0.18 mm (0.0051 - 0.0071 in)
GI
MA
EM
LC
EC
FE
AT
TF
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REAR FINAL DRIVEH233B
Removal and Installation
PD-43

STEERING SYSTEM
SECTION
ST
CONTENTS
PRECAUTIONS...............................................................2
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...............2
Precautions for Steering System .................................2
PREPARATION...............................................................3
Special Service Tools ..................................................3
Commercial Service Tools ...........................................5
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING.....................................................6
NVH Troubleshooting Chart.........................................6
ON-VEHICLE SERVICE..................................................7
Checking Steering Wheel Play ....................................7
Checking Neutral Position on Steering Wheel ............7
PRE-CHECKING........................................................7
CHECKING...............................................................7
Front Wheel Turning Angle ..........................................7
Checking Gear Housing Movement ............................8
Adjusting Rack Retainer ..............................................8
Checking and Adjusting Drive Belts ............................8
Checking Fluid Level ...................................................8
Checking Fluid Leakage ..............................................8
Bleeding Hydraulic System..........................................9
Checking Steering Wheel Turning Force ....................9
Checking Hydraulic System.......................................10
STEERING WHEEL AND STEERING COLUMN......... 11
Components............................................................... 11
Removal and Installation ........................................... 11
STEERING WHEEL................................................. 11
STEERING COLUMN...............................................12
Disassembly and Assembly .......................................13
Inspection...................................................................14
TILT MECHANISM...................................................14
STEERING TRANSFER GEAR.....................................15
Removal .....................................................................15
Installation ..................................................................16
Inspection...................................................................16
POWER STEERING GEAR AND LINKAGE................17
Components...............................................................17
Removal and Installation ...........................................18
Disassembly...............................................................19
Inspection...................................................................20
BOOT.....................................................................20
RACK.....................................................................20
PINION ASSEMBLY.................................................20
GEAR HOUSING CYLINDER....................................20
TIE-ROD OUTER AND INNER SOCKETS..................21
Assembly ...................................................................21
Adjustment .................................................................24
POWER STEERING OIL PUMP....................................27
Components...............................................................27
Pre-disassembly Inspection .......................................27
Disassembly...............................................................28
Inspection...................................................................29
Assembly ...................................................................29
SERVICE DATA AND SPECIFICATIONS (SDS).........32
General Specifications ...............................................32
Steering Wheel ..........................................................32
Steering Column ........................................................32
Steering Transfer Gear ..............................................32
Steering Gear and Linkage .......................................33
Power Steering ..........................................................33
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX

Tool number
(Kent-Moore No.)
Tool nameDescription
ST3127S000
(See J25765-A)
1 GG91030000
(J25765-A)
Torque wrench
2 HT62940000
(Ð)
Socket adapter
3 HT62900000
(Ð)
Socket adapter
NT541
Measuring turning torque
KV48104400
(Ð)
Rack seal ring reformer
NT550
Reforming teflon ring
a: 50 mm (1.97 in) dia.
b: 36 mm (1.42 in) dia.
c: 100 mm (3.94 in)
KV48103400
(Ð)
Torque adapter
NT236
Measuring steering transfer gear rotating
torque
KV48104200
(Ð)
Rear cover wrench
NT540
Removing and installing gear housing end
cover
a: 4 mm (0.16 in) dia.
b: 5 mm (0.20 in)
c: 3 mm (0.12 in) dia.
d: 5 mm (0.20 in)
(J43995)
Steering lock nut wrench
NT838
Adjusting steering pinion rotating torque
(J43996)
Steering rack adjustment
wrench
NT839
Adjusting steering pinion rotating torque
(J-44372)
Spring gauge
LST024
Measuring steering wheel turning force
PREPARATION
Special Service Tools (Cont'd)
ST-4

RemovalNBST0021
SST846C
1. Power steering gear assembly
2. Steering column lower joint3. Transfer gear assembly 4. Steering column upper joint
SST609C
1. Set wheels in the straight-ahead position.
2. Straight-forward position is indicated by a protrusion on the
power steering gear rear cover cap and matching mark on the
rear housing.
SST610C
3. Remove steering column upper and lower joint from transfer
gear.
4. Remove transfer gear assembly.
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
RS
BT
HA
SC
EL
IDX
STEERING TRANSFER GEAR
Removal
ST-15

SST847C
InstallationNBST00221. Set wheels in the straight-ahead position.
2. Install transfer gear assembly.
3. Install column lower joint while aligning groove with protrusions
on the steering gear rear cover cap.
4. Tighten bolt while aligning groove on steering gear. Before
tightening bolt, ensure it is inserted correctly.
SST848C
5. When attaching steering column upper and lower joint to trans-
fer gear, it must be positioned as shown in figure at left.
SST707CA
InspectionNBST0024Do not disassemble steering transfer gear assembly.
ICheck that steering transfer gear assembly operates smoothly.
Also check for grease leakage, deformation and damage.
Replace steering transfer gear assembly if necessary.
ICheck rotating torque at input shaft in 360É and in both direc-
tions.
Rotating torque:
0.25 - 0.69 N´m (2.5 - 7.0 kg-cm, 2.2 - 6.1 in-lb)
If rotating torque is out of specification, replace steering trans-
fer gear assembly.
STEERING TRANSFER GEAR
Installation
ST-16

General SpecificationsNBST0037
Applied modelAll
Steering modelPower steering
Steering gear typePR32K
Steering overall gear ratio 17.2
Turns of steering wheel
(Lock to lock)3.09
Steering column type Collapsible, tilt
Steering WheelNBST0038Unit: mm (in)
Steering wheel axial play0 (0)
Steering wheel play35 (1.38) or less
Movement of gear housing±2(±0.08) or less
Steering ColumnNBST0039Unit: mm (in)
Steering column length ªL1º 716.7 - 718.7 (28.22 - 28.30)
Steering column lower shaft length ªL
2º 178 - 180 (7.01 - 7.09)
Steering column upper joint length ªL
3º 430.7 - 432.7 (16.96 - 17.04)
SST739C
Steering Transfer GearNBST0041
Rotating torque0.25 - 0.69 N´m (2.5 - 7.0 kg-cm, 2.2 - 6.1 in-lb)
SERVICE DATA AND SPECIFICATIONS (SDS)
General Specifications
ST-32

TRANSFER
SECTION
TF
CONTENTS
PRECAUTIONS...............................................................3
Supplemental Restraint System (SRS)²AIR
BAG²and²SEAT BELT PRE-TENSIONER²...............3
Precautions ..................................................................3
Service Notice..............................................................4
Wiring Diagrams and Trouble Diagnosis .....................4
PREPARATION...............................................................5
Special Service Tools ..................................................5
Commercial Service Tools ...........................................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
Location of Electrical Parts ........................................14
Description of Electrical Parts ...................................15
TRANSFER MOTOR................................................15
WAIT DETECTION SWITCH.....................................15
2-4WD SHIFT SOLENOID VALVE.............................16
LINE PRESSURE SWITCH.......................................16
Circuit Diagram for Quick Pinpoint Check.................17
Wiring Diagram - TF -................................................18
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...............................................................27
Trouble Diagnosis without CONSULT-II ....................27
DESCRIPTION........................................................27
SELF-DIAGNOSTIC PROCEDURE............................28
INDICATIONS OF 4WD WARNING LAMP..................29
Trouble Diagnosis with CONSULT-II .........................30
SELF-DIAGNOSIS...................................................30
SELF-DIAGNOSTIC ITEMS......................................31
DATA MONITOR......................................................33
DATA MONITOR ITEMS...........................................34
REFERENCE VALUE IN DATA MONITOR MODE......36
WORK SUPPORT....................................................38
CLUTCH FORCE RELEASE LIMIT ADJUSTMENT.....39
TROUBLE DIAGNOSIS - INTRODUCTION..................41Introduction ................................................................41
DESCRIPTION........................................................41
DIAGNOSTIC WORKSHEET.....................................41
Work Flow ..................................................................43
HOW TO PERFORM TROUBLE DIAGNOSES FOR
QUICK AND ACCURATE REPAIR
.............................43
TROUBLE DIAGNOSIS - BASIC INSPECTION...........44
Listen to Customer Complaints .................................44
Transfer Fluid Check .................................................44
Road Test...................................................................44
PREPARATION FOR ROAD TEST............................44
1. CHECK BEFORE ENGINE IS STARTED...............45
2. CHECK AT IDLE..................................................47
3. CRUISE TEST.....................................................51
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION...............................................................54
Transfer Control Unit Terminals and Reference
Value ..........................................................................54
REMOVAL AND INSTALLATION OF TRANSFER
CONTROL UNIT
......................................................54
INSPECTION OF TRANSFER CONTROL UNIT..........54
TRANSFER CONTROL UNIT INSPECTION TABLE....55
VEHICLE SPEED SENSOR (FRONT
REVOLUTION SENSOR)..............................................61
Diagnostic Procedure ................................................61
4WD SOLENOID VALVE...............................................64
Diagnostic Procedure ................................................64
2-4WD SHIFT SOLENOID VALVE AND 4WD
SHIFT SWITCH..............................................................66
Diagnostic Procedure ................................................66
TRANSFER MOTOR AND TRANSFER MOTOR
RELAY...........................................................................70
Diagnostic Procedure ................................................70
TRANSFER FLUID TEMPERATURE SENSOR............73
Diagnostic Procedure ................................................73
ATP SWITCH, WAIT DETECTION SWITCH AND
NEUTRAL-4LO SWITCH...............................................76
Diagnostic Procedure ................................................76
CLUTCH PRESSURE SWITCH....................................80
Diagnostic Procedure ................................................80
GI
MA
EM
LC
EC
FE
AT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX

LINE PRESSURE SWITCH...........................................83
Diagnostic Procedure ................................................83
ABS OPERATION SIGNAL...........................................86
Diagnostic Procedure ................................................86
DATA ERASE/DISPLAY...............................................88
Diagnostic Procedure ................................................88
SHIFT ACTUATOR........................................................89
Diagnostic Procedure ................................................89
SHIFT ACTUATOR POSITION SWITCH......................92
Diagnostic Procedure ................................................92
SHIFT ACTUATOR CIRCUIT........................................94
Diagnostic Procedure ................................................94
TROUBLE DIAGNOSES FOR SYMPTOMS.................98
Symptom 1. 4WD Shift Indicator Lamp Does Not
Turn ON .....................................................................98
Symptom 2. 4WD Warning Lamp Does Not Turn
ON............................................................................100
Symptom 3. 4WD Shift Indicator Lamp Does Not
Turn OFF .................................................................102
Symptom 4. ATP Warning Lamp Does Not Turn
ON............................................................................102
Symptom 5. 4LO Indicator Lamp Does Not Turn
ON............................................................................104
Symptom 6. 4WD Shift Indicator Lamp Does Not
Indicate²4H²............................................................106
Symptom 7. 4WD Shift Indicator Lamp Repeats
Flickering..................................................................107
Symptom 8. Tight Corner Braking Symptom...........108
Symptom 9. 4WD System Does Not Operate.........109
COMPONENT INSPECTION....................................... 111
4WD Shift Switch ..................................................... 111
2-4WD Shift Solenoid Valve and Transfer Fluid
Temperature Sensor ................................................ 111
4WD Solenoid Valve, Clutch Pressure Switch
and Line Pressure Switch........................................ 111
Front Revolution Sensor .......................................... 112
Transfer Dropping Resistor...................................... 112
ATP Switch, Neutral-4LO Switch and Wait
Detection Switch ...................................................... 112
Transfer Motor ......................................................... 113
Transfer Motor Relay ............................................... 113
Transfer Sub-harness .............................................. 113
FRONT REVOLUTION SENSOR SUB-HARNESS
CONNECTOR
........................................................ 113
TRANSFER SWITCH ASSEMBLY SUB-HARNESS
CONNECTOR
........................................................ 114
TRANSFER TERMINAL CORD ASSEMBLY SUB-
HARNESS CONNECTOR
....................................... 114
Transfer Shift Relay (High & low) ............................ 114
Actuator & Actuator Position Switch ........................ 115
ACTUATOR........................................................... 115
ACTUATOR POSITION SWITCH............................ 115
ON-VEHICLE SERVICE.............................................. 116
Replacing Oil Seal ................................................... 116
FRONT CASE OIL SEAL........................................ 116
SHIFT SHAFT OIL SEAL........................................ 117
REAR OIL SEAL.................................................... 117
Transfer Motor ......................................................... 117
REMOVAL............................................................. 117
INSTALLATION...................................................... 117
Transfer Oil Filter ..................................................... 118
REMOVAL............................................................. 118
INSTALLATION...................................................... 118
REMOVAL AND INSTALLATION............................... 119
Removal ................................................................... 119
Installation ................................................................ 119
OVERHAUL.................................................................120
Transfer Gear Control ..............................................120
Transfer Components ..............................................121
DISASSEMBLY............................................................123
Rear Case................................................................123
DISASSEMBLY......................................................123
Center Case.............................................................123
DISASSEMBLY......................................................123
Front Case ...............................................................133
DISASSEMBLY......................................................133
REPAIR FOR COMPONENT PARTS.........................137
Front Case ...............................................................137
INSPECTION.........................................................137
Center Case.............................................................138
INSPECTION.........................................................138
ASSEMBLY..................................................................141
Front Case ...............................................................141
ASSEMBLY...........................................................141
Center Case.............................................................145
ASSEMBLY...........................................................145
Final Assembly.........................................................153
SERVICE DATA AND SPECIFICATIONS (SDS).......157
General Specifications .............................................157
Inner Gear and Outer Gear .....................................157
SUB-OIL PUMP.....................................................157
MAIN OIL PUMP....................................................157
Control Valve ...........................................................157
VALVE..................................................................157
SPRING................................................................157
Clutch .......................................................................158
DRIVE PLATE.......................................................158
DRIVEN PLATE.....................................................158
RETURN SPRING..................................................158
RETAINING PLATE................................................158
Seal Ring (Mainshaft side) ......................................159
Bearing Race (Thrust needle bearing side) ............159
Snap Ring (Sun gear side) ......................................159
CONTENTS(Cont'd)
TF-2