1996-2004 Nissan Pathfinder Service & Repair Manual

AUTOMATIC TRANSMISSION SECTION AT CONTENTS TROUBLE DIAGNOSIS - INDEX ....................................4 Alphabetical & P No. Index for DTC ...........................4 PRECAUTIONS ...............................................................6 Precautions for Supplemental Restraint System (SRS) ″AIR BAG″ and ″SEAT BELT PRE-TENSIONER″ ......................................................6 Precautions for On Board Diagnostic (OBD) System of A/T and Engine...........................................6 Precautions ..................................................................6 Service Notice or Precautions .....................................8 Wiring Diagrams and Trouble Diagnosis .....................9 PREPARATION .............................................................10 Special Service Tools ................................................10 OVERALL SYSTEM ......................................................12 A/T Electrical Parts Location .....................................12 Circuit Diagram ..........................................................13 Cross-sectional View .................................................14 Hydraulic Control Circuit ............................................15 Shift Mechanism ........................................................16 Control System ..........................................................25 Control Mechanism....................................................26 Control Valve .............................................................31 ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION ...............................................................33 Introduction ................................................................33 OBD-II Function for A/T System................................33 One or Two Trip Detection Logic of OBD-II ..............33 OBD-II Diagnostic Trouble Code (DTC) ....................33 Malfunction Indicator Lamp (MIL) ..............................37 CONSULT-II ...............................................................37 Diagnostic Procedure Without CONSULT-II ..............48 TROUBLE DIAGNOSIS - INTRODUCTION..................55 Introduction ................................................................55 Work Flow ..................................................................59 TROUBLE DIAGNOSIS - BASIC INSPECTION ...........61 A/T Fluid Check .........................................................61 Stall Test ....................................................................61 Line Pressure Test .....................................................64 Road Test ...................................................................65 TROUBLE DIAGNOSIS - GENERAL DESCRIPTION ...............................................................83 Symptom Chart ..........................................................83 TCM Terminals and Reference Value........................95 CAN COMMUNICATION ...............................................98 System Description ....................................................98 TROUBLE DIAGNOSIS FOR POWER SUPPLY..........99 Wiring Diagram - AT - MAIN......................................99 Diagnostic Procedure ..............................................100 DTC P0705 PARK/NEUTRAL POSITION SWITCH ...102 Description ...............................................................102 Wiring Diagram - AT - PNP/SW...............................104 Diagnostic Procedure ..............................................105 Component Inspection .............................................106 DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT .......................................................................108 Description ...............................................................108 Wiring Diagram - AT - FTS ...................................... 110 Diagnostic Procedure .............................................. 111 Component Inspection ............................................. 113 DTC P0720 VEHICLE SPEED SENSOR.A/T (REVOLUTION SENSOR) ........................................... 114 Description ............................................................... 114 Wiring Diagram - AT - VSSA/T ................................ 116 Diagnostic Procedure .............................................. 117 Component Inspection ............................................. 118 DTC P0725 ENGINE SPEED SIGNAL ....................... 119 Description ............................................................... 119 Wiring Diagram - AT - ENGSS ................................120 Diagnostic Procedure ..............................................121 DTC P0731 IMPROPER SHIFTING TO 1ST GEAR POSITION ....................................................................123 Description ...............................................................123 Wiring Diagram - AT - 1ST ......................................126 Diagnostic Procedure ..............................................127 Component Inspection .............................................128 DTC P0732 IMPROPER SHIFTING TO 2ND GEAR POSITION ....................................................................129 Description ...............................................................129 GI MA EM LC EC FE CL MT TF PD AX SU BR ST RS BT HA SC EL IDX

Wiring Diagram - AT - 2ND......................................132 Diagnostic Procedure ..............................................133 Component Inspection .............................................134 DTC P0733 IMPROPER SHIFTING TO 3RD GEAR POSITION ....................................................................135 Description ...............................................................135 Wiring Diagram - AT - 3RD......................................138 Diagnostic Procedure ..............................................139 Component Inspection .............................................140 DTC P0734 IMPROPER SHIFTING TO 4TH GEAR POSITION ....................................................................141 Description ...............................................................141 Wiring Diagram - AT - 4TH ......................................145 Diagnostic Procedure ..............................................146 Component Inspection .............................................150 DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE......................................................151 Description ...............................................................151 Wiring Diagram - AT - TCV......................................153 Diagnostic Procedure ..............................................154 Component Inspection .............................................155 DTC P0744 IMPROPER LOCK-UP OPERATION ......156 Description ...............................................................156 Wiring Diagram - AT - TCCSIG ...............................159 Diagnostic Procedure ..............................................160 Component Inspection .............................................164 DTC P0745 LINE PRESSURE SOLENOID VALVE ...165 Description ...............................................................165 Wiring Diagram - AT - LPSV....................................167 Diagnostic Procedure ..............................................168 Component Inspection .............................................170 DTC P0750 SHIFT SOLENOID VALVE A ..................171 Description ...............................................................171 Wiring Diagram - AT - SSV/A ..................................172 Diagnostic Procedure ..............................................173 Component Inspection .............................................174 DTC P0755 SHIFT SOLENOID VALVE B ..................175 Description ...............................................................175 Wiring Diagram - AT - SSV/B ..................................176 Diagnostic Procedure ..............................................177 Component Inspection .............................................178 DTC P1705 ACCELERATOR PEDAL POSITION SENSOR (THROTTLE POSITION SENSOR) .............179 Description ...............................................................179 On Board Diagnosis Logic.......................................180 Possible Cause ........................................................180 Diagnostic Trouble Code (DTC) Confirmation Procedure ................................................................181 Wiring Diagram - AT - TPS ......................................182 Diagnostic Procedure ..............................................183 DTC P1760 OVERRUN CLUTCH SOLENOID VALVE..........................................................................185 Description ...............................................................185 Wiring Diagram - AT - OVRCSV..............................187 Diagnostic Procedure ..............................................188 Component Inspection .............................................189 DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM POWER SOURCE) ....190 Description ...............................................................190 Wiring Diagram - AT - BA/FTS ................................192 Diagnostic Procedure ..............................................193 Component Inspection .............................................196 DTC VEHICLE SPEED SENSOR.MTR .......................197 Description ...............................................................197 Wiring Diagram - AT - VSSMTR..............................199 Diagnostic Procedure ..............................................200 DTC U1000 CAN COMMUNICATION LINE ...............202 Description ...............................................................202 On Board Diagnosis Logic.......................................202 Possible Cause ........................................................202 Diagnostic Trouble Code (DTC) Confirmation Procedure ................................................................203 Wiring Diagram - AT - CAN .....................................204 Diagnostic Procedure ..............................................205 DTC TURBINE REVOLUTION SENSOR ....................206 Description ...............................................................206 Wiring Diagram - AT - TRSA/T ................................208 Diagnostic Procedure ..............................................209 Component Inspection .............................................210 DTC CONTROL UNIT (RAM), CONTROL UNIT (ROM) ........................................................................... 211 Description ............................................................... 211 Diagnostic Procedure ..............................................212 DTC CONTROL UNIT (EEP ROM) .............................213 Description ...............................................................213 Diagnostic Procedure ..............................................214 TROUBLE DIAGNOSES FOR SYMPTOMS ...............215 Wiring Diagram - AT - NONDTC .............................215 O/D OFF Indicator Lamp Does Not Come On ........218 Engine Cannot Be Started In ″P″ and ″N″ Position ....................................................................220 In ″P″ Position, Vehicle Moves Forward Or Backward When Pushed .........................................221 In ″N″ Position, Vehicle Moves................................222 Large Shock. ″N″ -> ″R″ Position............................224 Vehicle Does Not Creep Backward In ″R″ Position ....................................................................226 Vehicle Does Not Creep Forward In ″D″, ″2″ Or ″1″ Position ..............................................................229 Vehicle Cannot Be Started From D 1 .......................232 A/T Does Not Shift: D 1 -> D 2 Or Does Not Kickdown: D 4 -> D 2 ..................................................235 A/T Does Not Shift: D 2 -> D 3 ...................................238 A/T Does Not Shift: D 3 -> D 4 ...................................241 CONTENTS (Cont’d) AT-2

A/T Does Not Perform Lock-up ...............................244 A/T Does Not Hold Lock-up Condition ....................246 Lock-up Is Not Released .........................................248 Engine Speed Does Not Return To Idle (Light Braking D 4 -> D 3 ).....................................................249 Vehicle Does Not Start From D 1 .............................251 A/T Does Not Shift: D 4 -> D 3 , When Overdrive Control Switch ″ON″ -> ″OFF″ ................................252 A/T Does Not Shift: D 3 -> 2 2 , When Selector Lever ″D″ -> ″2″ Position.........................................253 A/T Does Not Shift: 2 2 -> 1 1 , When Selector Lever ″2″ -> ″1″ Position .........................................254 Vehicle Does Not Decelerate By Engine Brake ......255 TCM Self-diagnosis Does Not Activate (PNP, Overdrive Control and Accelerator Pedal Position Sensor Circuit Checks) ............................................255 A/T SHIFT LOCK SYSTEM.........................................262 Description ...............................................................262 Wiring Diagram - SHIFT - ........................................263 Diagnostic Procedure ..............................................264 KEY INTERLOCK CABLE ..........................................267 Components.............................................................267 Removal ...................................................................267 Installation ................................................................268 ON-VEHICLE SERVICE ..............................................269 Control Valve Assembly and Accumulators .............269 Revolution Sensor Replacement .............................270 Turbine Revolution Sensor Replacement ................270 Rear Oil Seal Replacement .....................................270 Rear Oil Seal and Companion Flange Oil Seal Replacement ............................................................271 Parking Components Inspection..............................271 Park/Neutral Position Switch Adjustment ................272 Manual Control Linkage Adjustment........................272 REMOVAL AND INSTALLATION ...............................273 Removal ...................................................................273 Installation ................................................................274 OVERHAUL .................................................................278 Components.............................................................278 Oil Channel ..............................................................281 Locations of Needle Bearings, Thrust Washers and Snap Rings .......................................................282 DISASSEMBLY............................................................283 REPAIR FOR COMPONENT PARTS .........................294 Oil Pump ..................................................................294 Control Valve Assembly ...........................................298 Control Valve Upper Body .......................................304 Control Valve Lower Body .......................................309 Reverse Clutch ........................................................ 311 High Clutch ..............................................................314 Forward and Overrun Clutches ...............................317 Low & Reverse Brake..............................................321 Forward Clutch Drum Assembly ..............................325 Rear Internal Gear and Forward Clutch Hub ..........327 Band Servo Piston Assembly ..................................330 Parking Pawl Components ......................................334 ASSEMBLY..................................................................336 Assembly (1) ............................................................336 Adjustment ...............................................................344 Assembly (2) ............................................................346 SERVICE DATA AND SPECIFICATIONS (SDS) .......353 General Specifications .............................................353 Shift Schedule..........................................................353 Stall Revolution ........................................................353 Line Pressure...........................................................353 Return Springs .........................................................354 Accumulator O-ring ..................................................355 Clutches and Brakes ...............................................355 Oil Pump and Low One-way Clutch ........................357 Total End Play..........................................................357 Reverse Clutch Drum End Play ..............................358 Removal and Installation .........................................358 Shift Solenoid Valves ...............................................358 Solenoid Valves .......................................................358 A/T Fluid Temperature Sensor.................................358 Turbine Revolution Sensor ......................................358 Revolution Sensor ...................................................359 Dropping Resistor ....................................................359 GI MA EM LC EC FE CL MT TF PD AX SU BR ST RS BT HA SC EL IDX CONTENTS (Cont’d) AT-3

Alphabetical & P No. Index for DTC NAAT0179 ALPHABETICAL INDEX FOR DTC NAAT0179S01 Items (CONSULT-II screen terms) DTC Reference page CONSULT-II GST*1 A/T 1ST GR FNCTN P0731 AT-123 A/T 2ND GR FNCTN P0732 AT-129 A/T 3RD GR FNCTN P0733 AT-135 A/T 4TH GR FNCTN P0734 AT-141 A/T TCC S/V FNCTN P0744 AT-156 ATF TEMP SEN/CIRC P0710 AT-108 ENGINE SPEED SIG P0725 AT-119 L/PRESS SOL/CIRC P0745 AT-165 O/R CLTCH SOL/CIRC P1760 AT-185 PNP SW/CIRC P0705 AT-102 SFT SOL A/CIRC*2 P0750 AT-171 SFT SOL B/CIRC*2 P0755 AT-175 TCC SOLENOID/CIRC P0740 AT-151 TP SEN/CIRC A/T*2 P1705 AT-179 VEH SPD SEN/CIR AT*3 P0720 AT-114 *1: These numbers are prescribed by SAE J2012. *2: When the fail-safe operation occurs, the MIL illuminates. *3: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at the same time. TROUBLE DIAGNOSIS — INDEX Alphabetical & P No. Index for DTC AT-4

P NO. INDEX FOR DTC =NAAT0179S02 DTC Items (CONSULT-II screen terms) Reference page CONSULT-II GST*1 P0705 PNP SW/CIRC AT-102 P0710 ATF TEMP SEN/CIRC AT-108 P0720 VEH SPD SEN/CIR AT*3 AT-114 P0725 ENGINE SPEED SIG AT-119 P0731 A/T 1ST GR FNCTN AT-123 P0732 A/T 2ND GR FNCTN AT-129 P0733 A/T 3RD GR FNCTN AT-135 P0734 A/T 4TH GR FNCTN AT-141 P0740 TCC SOLENOID/CIRC AT-151 P0744 A/T TCC S/V FNCTN AT-156 P0745 L/PRESS SOL/CIRC AT-165 P0750 SFT SOL A/CIRC*2 AT-171 P0755 SFT SOL B/CIRC*2 AT-175 P1705 TP SEN/CIRC A/T*2 AT-179 P1760 O/R CLTCH SOL/CIRC AT-185 *1: These numbers are prescribed by SAE J2012. *2: When the fail-safe operation occurs, the MIL illuminates. *3: The MIL illuminates when both the “Revolution sensor signal” and the “Vehicle speed sensor signal” meet the fail-safe condition at the same time. GI MA EM LC EC FE CL MT TF PD AX SU BR ST RS BT HA SC EL IDX TROUBLE DIAGNOSIS — INDEX Alphabetical & P No. Index for DTC (Cont’d) AT-5

1996-2004 Nissan Pathfinder Service & Repair Manual

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