Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX4 R50 1997-1998.2001 Approved QX4-R50-2001 tf
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TRANSFER GI
SECTION TF MA
EM
LC
EC
CONTENTS FE
PRECAUTIONS ...............................................................3 Introduction ................................................................41
AT
Supplemental Restraint System (SRS) AIR DESCRIPTION ........................................................41
BAG and SEAT BELT PRE-TENSIONER...............3 DIAGNOSTIC WORKSHEET.....................................41
Precautions ..................................................................3 Work Flow..................................................................43
Service Notice..............................................................4 HOW TO PERFORM TROUBLE DIAGNOSES FOR
Wiring Diagrams and Trouble Diagnosis.....................4 QUICK AND ACCURATE REPAIR .............................43 PD
PREPARATION ...............................................................5 TROUBLE DIAGNOSIS - BASIC INSPECTION ...........44
Special Service Tools ..................................................5 Listen to Customer Complaints .................................44
Commercial Service Tools ...........................................9 Transfer Fluid Check .................................................44 AX
ALL-MODE 4WD SYSTEM ...........................................10 Road Test...................................................................44
PREPARATION FOR ROAD TEST ............................44
Cross-sectional View .................................................10 SU
1. CHECK BEFORE ENGINE IS STARTED ...............45
Control System ..........................................................11
2. CHECK AT IDLE ..................................................47
ALL-MODE 4WD TRANSFER BASIC CONTROL ........12
3. CRUISE TEST .....................................................51
HYDRAULIC CONTROL CIRCUITS ...........................12
TROUBLE DIAGNOSIS - GENERAL BR
OUTLINE ................................................................12
CONTROL SYSTEM DIAGRAM ................................13
DESCRIPTION ...............................................................54
INDICATIONS OF 4WD WARNING LAMP..................13 Transfer Control Unit Terminals and Reference ST
Location of Electrical Parts........................................14 Value ..........................................................................54
Description of Electrical Parts ...................................15 REMOVAL AND INSTALLATION OF TRANSFER
TRANSFER MOTOR ................................................15 CONTROL UNIT ......................................................54 RS
WAIT DETECTION SWITCH .....................................15 INSPECTION OF TRANSFER CONTROL UNIT..........54
2-4WD SHIFT SOLENOID VALVE .............................16 TRANSFER CONTROL UNIT INSPECTION TABLE ....55
LINE PRESSURE SWITCH .......................................16 VEHICLE SPEED SENSOR (FRONT BT
Circuit Diagram for Quick Pinpoint Check.................17 REVOLUTION SENSOR) ..............................................61
Wiring Diagram - TF -................................................18 Diagnostic Procedure ................................................61
ON BOARD DIAGNOSTIC SYSTEM 4WD SOLENOID VALVE...............................................64 HA
DESCRIPTION ...............................................................27 Diagnostic Procedure ................................................64
Trouble Diagnosis without CONSULT-II ....................27 2-4WD SHIFT SOLENOID VALVE AND 4WD
SHIFT SWITCH..............................................................66
SC
DESCRIPTION ........................................................27
SELF-DIAGNOSTIC PROCEDURE............................28 Diagnostic Procedure ................................................66
INDICATIONS OF 4WD WARNING LAMP..................29 TRANSFER MOTOR AND TRANSFER MOTOR EL
Trouble Diagnosis with CONSULT-II .........................30 RELAY ...........................................................................70
SELF-DIAGNOSIS ...................................................30 Diagnostic Procedure ................................................70
SELF-DIAGNOSTIC ITEMS ......................................31 TRANSFER FLUID TEMPERATURE SENSOR............73 IDX
DATA MONITOR......................................................33 Diagnostic Procedure ................................................73
DATA MONITOR ITEMS ...........................................34 ATP SWITCH, WAIT DETECTION SWITCH AND
REFERENCE VALUE IN DATA MONITOR MODE ......36
NEUTRAL-4LO SWITCH...............................................76
WORK SUPPORT ....................................................38
Diagnostic Procedure ................................................76
CLUTCH FORCE RELEASE LIMIT ADJUSTMENT .....39
CLUTCH PRESSURE SWITCH ....................................80
TROUBLE DIAGNOSIS - INTRODUCTION..................41
Diagnostic Procedure ................................................80
CONTENTS (Cont'd)
LINE PRESSURE SWITCH ...........................................83 ACTUATOR POSITION SWITCH ............................115
Diagnostic Procedure ................................................83 ON-VEHICLE SERVICE ..............................................116
ABS OPERATION SIGNAL...........................................86 Replacing Oil Seal ...................................................116
Diagnostic Procedure ................................................86 FRONT CASE OIL SEAL ........................................116
DATA ERASE/DISPLAY ...............................................88 SHIFT SHAFT OIL SEAL ........................................117
Diagnostic Procedure ................................................88 REAR OIL SEAL ....................................................117
SHIFT ACTUATOR........................................................89 Transfer Motor .........................................................117
REMOVAL .............................................................117
Diagnostic Procedure ................................................89
INSTALLATION......................................................117
SHIFT ACTUATOR POSITION SWITCH ......................92
Transfer Oil Filter .....................................................118
Diagnostic Procedure ................................................92
REMOVAL .............................................................118
SHIFT ACTUATOR CIRCUIT ........................................94
INSTALLATION......................................................118
Diagnostic Procedure ................................................94 REMOVAL AND INSTALLATION ...............................119
TROUBLE DIAGNOSES FOR SYMPTOMS .................98 Removal...................................................................119
Symptom 1. 4WD Shift Indicator Lamp Does Not Installation................................................................119
Turn ON .....................................................................98 OVERHAUL .................................................................120
Symptom 2. 4WD Warning Lamp Does Not Turn Transfer Gear Control..............................................120
ON............................................................................100 Transfer Components ..............................................121
Symptom 3. 4WD Shift Indicator Lamp Does Not DISASSEMBLY............................................................123
Turn OFF .................................................................102 Rear Case................................................................123
Symptom 4. ATP Warning Lamp Does Not Turn DISASSEMBLY ......................................................123
ON............................................................................102 Center Case.............................................................123
Symptom 5. 4LO Indicator Lamp Does Not Turn DISASSEMBLY ......................................................123
ON............................................................................104 Front Case ...............................................................133
Symptom 6. 4WD Shift Indicator Lamp Does Not DISASSEMBLY ......................................................133
Indicate 4H............................................................106 REPAIR FOR COMPONENT PARTS .........................137
Symptom 7. 4WD Shift Indicator Lamp Repeats Front Case ...............................................................137
Flickering..................................................................107 INSPECTION .........................................................137
Symptom 8. Tight Corner Braking Symptom...........108 Center Case.............................................................138
Symptom 9. 4WD System Does Not Operate.........109 INSPECTION .........................................................138
COMPONENT INSPECTION ....................................... 111 ASSEMBLY..................................................................141
4WD Shift Switch..................................................... 111 Front Case ...............................................................141
2-4WD Shift Solenoid Valve and Transfer Fluid ASSEMBLY ...........................................................141
Temperature Sensor ................................................ 111 Center Case.............................................................145
4WD Solenoid Valve, Clutch Pressure Switch ASSEMBLY ...........................................................145
and Line Pressure Switch........................................ 111 Final Assembly.........................................................153
Front Revolution Sensor..........................................112 SERVICE DATA AND SPECIFICATIONS (SDS) .......157
Transfer Dropping Resistor......................................112 General Specifications.............................................157
ATP Switch, Neutral-4LO Switch and Wait Inner Gear and Outer Gear .....................................157
Detection Switch ......................................................112 SUB-OIL PUMP .....................................................157
Transfer Motor .........................................................113 MAIN OIL PUMP ....................................................157
Transfer Motor Relay ...............................................113 Control Valve ...........................................................157
VALVE ..................................................................157
Transfer Sub-harness ..............................................113
SPRING ................................................................157
FRONT REVOLUTION SENSOR SUB-HARNESS
Clutch.......................................................................158
CONNECTOR ........................................................113
DRIVE PLATE .......................................................158
TRANSFER SWITCH ASSEMBLY SUB-HARNESS
DRIVEN PLATE .....................................................158
CONNECTOR ........................................................114
RETURN SPRING..................................................158
TRANSFER TERMINAL CORD ASSEMBLY SUB-
RETAINING PLATE................................................158
HARNESS CONNECTOR .......................................114
Transfer Shift Relay (High & low)............................114 Seal Ring (Mainshaft side) ......................................159
Actuator & Actuator Position Switch........................115 Bearing Race (Thrust needle bearing side) ............159
ACTUATOR ...........................................................115 Snap Ring (Sun gear side)......................................159
TF-2
PRECAUTIONS
Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
Supplemental Restraint System (SRS) "AIR
BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER" used along with
NBTF0001
GI
a seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of
collision. The SRS system composition which is available to INFINITI QX4 is as follows: MA
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