Index Infiniti Infiniti F50 - service repair manual 2006 year

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Infiniti F50. Manual - part 29

AT-1

AUTOMATIC TRANSMISSION

C TRANSMISSION/TRANSAXLE

CONTENTS

D

E

F

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SECTION

A

B

AT

AUTOMATIC TRANSMISSION

INDEX FOR DTC ........................................................ 5

Alphabetical Index .................................................... 5
DTC No. Index ......................................................... 6

PRECAUTIONS .......................................................... 7

Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 7
Precautions for On Board Diagnostic (OBD) System
of A/T and Engine .................................................... 7
Precautions for A/T Assembly Replacement ............ 8
Precautions .............................................................. 9
Service Notice or Precautions ................................ 10
Wiring Diagrams and Trouble Diagnosis .................11

PREPARATION ......................................................... 12

Special Service Tools ............................................. 12
Commercial Service Tools ...................................... 13

A/T FLUID ................................................................. 14

Changing A/T Fluid ................................................ 14
Checking A/T Fluid ................................................. 14

A/T CONTROL SYSTEM .......................................... 16

Cross-Sectional View  ............................................. 16
Shift Mechanism ..................................................... 17
TCM Function ......................................................... 28
CAN Communication .............................................. 29
Input/Output Signal of TCM .................................... 31
Line Pressure Control  ............................................ 32
Shift Control  ........................................................... 34
Lock-Up Control  ..................................................... 35
Engine Brake Control  ............................................. 36
Control Valve  .......................................................... 36

ON BOARD DIAGNOSTIC (OBD) SYSTEM ............ 38

Introduction ............................................................ 38
OBD-II Function for A/T System ............................. 38
One or Two Trip Detection Logic of OBD-II ............ 38
OBD-II Diagnostic Trouble Code (DTC) ................. 38
Malfunction Indicator Lamp (MIL) ........................... 41

TROUBLE DIAGNOSIS ............................................ 42

DTC Inspection Priority Chart ................................ 42
Fail-Safe ................................................................. 42
How To Perform Trouble Diagnosis For Quick and

Accurate Repair ...................................................... 44
A/T Electrical Parts Location  .................................. 49
Circuit Diagram ....................................................... 50
Inspections Before Trouble Diagnosis  .................... 51
Check Before Engine is Started .............................. 55
Check at Idle ........................................................... 55
Cruise Test - Part 1 ................................................. 56
Cruise Test - Part 2 ................................................. 58
Cruise Test - Part 3 ................................................. 59
Vehicle Speed When Shifting Gears  ...................... 60
Vehicle Speed When Performing and Releasing
Complete Lock-up  .................................................. 60
Vehicle Speed When Performing and Releasing
Slip Lock-up ............................................................ 60
Symptom Chart ....................................................... 60
TCM Input/Output Signal Reference Values ........... 84
CONSULT-II ............................................................ 86
Diagnostic Procedure Without CONSULT-II  ........... 97

DTC U1000 CAN COMMUNICATION LINE .............. 99

Description .............................................................. 99
On Board Diagnosis Logic ...................................... 99
Possible Cause ....................................................... 99
DTC Confirmation Procedure ................................. 99
Wiring Diagram — AT — CAN .............................. 100
Diagnostic Procedure ........................................... 101

DTC P0615 START SIGNAL CIRCUIT ................... 102

Description ............................................................ 102
On Board Diagnosis Logic .................................... 102
Possible Cause ..................................................... 102
DTC Confirmation Procedure  ............................... 102
Wiring Diagram — AT — STSIG  .......................... 103
Diagnostic Procedure  ........................................... 104

DTC P0705 PARK/NEUTRAL POSITION SWITCH .105

Description ............................................................ 105
On Board Diagnosis Logic .................................... 105
Possible Cause ..................................................... 105
DTC Confirmation Procedure  ............................... 105
Wiring Diagram — AT — PNP/SW  ....................... 106
Diagnostic Procedure  ........................................... 107
Component Inspection .......................................... 109

AT-2

DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) ............................................... 110

Description ............................................................ 110
On Board Diagnosis Logic  .................................... 110
Possible Cause ..................................................... 110
DTC Confirmation Procedure  ............................... 110
Wiring Diagram — AT — VSSA/T ..........................111
Diagnostic Procedure  ........................................... 112

DTC P0725 ENGINE SPEED SIGNAL ................... 115

Description ............................................................ 115
On Board Diagnosis Logic  .................................... 115
Possible Cause ..................................................... 115
DTC Confirmation Procedure  ............................... 115
Diagnostic Procedure  ........................................... 115

DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE ................................................. 117

Description ............................................................ 117
CONSULT-II Reference Value  .............................. 117
On Board Diagnosis Logic  .................................... 117
Possible Cause ..................................................... 117
DTC Confirmation Procedure  ............................... 117
Wiring Diagram — AT — TCV  .............................. 118
Diagnostic Procedure  ........................................... 119
Component Inspection .......................................... 120

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) . 122

Description ............................................................ 122
On Board Diagnosis Logic  .................................... 122
Possible Cause ..................................................... 122
DTC Confirmation Procedure  ............................... 122
Wiring Diagram — AT — TCCSIG ........................ 123
Diagnostic Procedure  ........................................... 124
Component Inspection .......................................... 125

DTC P0745 LINE PRESSURE SOLENOID VALVE .127

Description ............................................................ 127
On Board Diagnosis Logic  .................................... 127
Possible Cause ..................................................... 127
DTC Confirmation Procedure  ............................... 127
Wiring Diagram — AT — LPSV  ............................ 128
Diagnostic Procedure  ........................................... 129
Component Inspection .......................................... 130

DTC P1701 TRANSMISSION CONTROL MODULE
(POWER SUPPLY) .................................................. 132

Description ............................................................ 132
On Board Diagnosis Logic  .................................... 132
Possible Cause ..................................................... 132
DTC Confirmation Procedure  ............................... 132
Wiring Diagram — AT — POWER ........................ 133
Diagnostic Procedure  ........................................... 136
Component Inspection .......................................... 137

DTC P1702 TRANSMISSION CONTROL MODULE
(RAM) ...................................................................... 138

Description ............................................................ 138
On Board Diagnosis Logic  .................................... 138
Possible Cause ..................................................... 138
DTC Confirmation Procedure  ............................... 138
Diagnostic Procedure  ........................................... 139

DTC P1703 TRANSMISSION CONTROL MODULE
(ROM) ...................................................................... 140

Description ............................................................ 140

On Board Diagnosis Logic ....................................140
Possible Cause .....................................................140
DTC Confirmation Procedure ................................140
Diagnostic Procedure ............................................141

DTC P1704 TRANSMISSION CONTROL MODULE
(EEPROM) ...............................................................142

Description ............................................................142
On Board Diagnosis Logic ....................................142
Possible Cause .....................................................142
DTC Confirmation Procedure ................................142
Diagnostic Procedure ............................................143

DTC P1705 THROTTLE POSITION SENSOR ........144

Description ............................................................144
On Board Diagnosis Logic ....................................144
Possible Cause .....................................................144
DTC Confirmation Procedure ................................144
Diagnostic Procedure ............................................144

DTC P1710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT ..................................................................146

Description ............................................................146
CONSULT-II Reference Value ...............................146
On Board Diagnosis Logic  ....................................146
Possible Cause  .....................................................146
DTC Confirmation Procedure ................................146
Wiring Diagram — AT — FTS  ...............................147
Diagnostic Procedure ............................................148
Component Inspection  ..........................................151

DTC P1716 TURBINE REVOLUTION SENSOR ....152

Description ............................................................152
On Board Diagnosis Logic  ....................................152
Possible Cause  .....................................................152
DTC Confirmation Procedure ................................152
Wiring Diagram — AT — TRSA/T  .........................153
Diagnostic Procedure ............................................154

DTC P1721 VEHICLE SPEED SENSOR MTR .......157

Description ............................................................157
On Board Diagnosis Logic ....................................157
Possible Cause .....................................................157
DTC Confirmation Procedure ................................157
Diagnostic Procedure ............................................157

DTC P1730 A/T INTERLOCK .................................159

Description ............................................................159
On Board Diagnosis Logic  ....................................159
Possible Cause  .....................................................159
DTC Confirmation Procedure ................................159
Wiring Diagram — AT — I/LOCK  ..........................160
Judgement of A/T Interlock  ...................................164
Diagnostic Procedure ............................................165

DTC P1731 A/T 1ST ENGINE BRAKING ...............166

Description ............................................................166
On Board Diagnosis Logic  ....................................166
Possible Cause  .....................................................166
DTC Confirmation Procedure ................................166
Wiring Diagram — AT — E/BRE  ...........................167
Diagnostic Procedure ............................................168

DTC P1752 INPUT CLUTCH SOLENOID VALVE ..170

Description ............................................................170
On Board Diagnosis Logic ....................................170
Possible Cause .....................................................170

AT-3

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AT

DTC Confirmation Procedure  ............................... 170
Wiring Diagram — AT — I/C  ................................ 171
Diagnostic Procedure  ........................................... 172
Component Inspection  ......................................... 174

DTC P1754 INPUT CLUTCH SOLENOID VALVE
FUNCTION .............................................................. 175

Description ........................................................... 175
On Board Diagnosis Logic  ................................... 175
Possible Cause  .................................................... 175
DTC Confirmation Procedure  ............................... 175
Wiring Diagram — AT — I/CF  .............................. 176
Diagnostic Procedure  ........................................... 177

DTC P1757 FRONT BRAKE SOLENOID VALVE .. 179

Description ........................................................... 179
On Board Diagnosis Logic  ................................... 179
Possible Cause  .................................................... 179
DTC Confirmation Procedure  ............................... 179
Wiring Diagram — AT — FR/B ............................. 180
Diagnostic Procedure  ........................................... 181
Component Inspection  ......................................... 183

DTC P1759 FRONT BRAKE SOLENOID VALVE
FUNCTION .............................................................. 184

Description ........................................................... 184
On Board Diagnosis Logic  ................................... 184
Possible Cause  .................................................... 184
DTC Confirmation Procedure  ............................... 184
Wiring Diagram — AT — FR/BF ........................... 185
Diagnostic Procedure  ........................................... 186

DTC P1762 DIRECT CLUTCH SOLENOID VALVE

Description ........................................................... 188
On Board Diagnosis Logic  ................................... 188
Possible Cause  .................................................... 188
DTC Confirmation Procedure  ............................... 188
Wiring Diagram — AT — D/C ............................... 189
Diagnostic Procedure  ........................................... 190
Component Inspection  ......................................... 192

DTC P1764 DIRECT CLUTCH SOLENOID VALVE
FUNCTION .............................................................. 193

Description ........................................................... 193
On Board Diagnosis Logic  ................................... 193
Possible Cause  .................................................... 193
DTC Confirmation Procedure  ............................... 193
Wiring Diagram — AT — D/CF ............................. 194
Diagnostic Procedure  ........................................... 195

DTC P1767 HIGH AND LOW REVERSE CLUTCH
SOLENOID VALVE ................................................. 197

Description ........................................................... 197
On Board Diagnosis Logic  ................................... 197
Possible Cause  .................................................... 197
DTC Confirmation Procedure  ............................... 197
Wiring Diagram — AT — HLR/C  .......................... 198
Diagnostic Procedure  ........................................... 199
Component Inspection  ......................................... 201

DTC P1769 HIGH AND LOW REVERSE CLUTCH
SOLENOID VALVE FUNCTION ............................. 202

Description ........................................................... 202
On Board Diagnosis Logic  ................................... 202
Possible Cause  .................................................... 202
DTC Confirmation Procedure  ............................... 202

Wiring Diagram — AT — HLR/CF ........................ 203
Diagnostic Procedure ........................................... 204

DTC P1772 LOW COAST BRAKE SOLENOID
VALVE ..................................................................... 206

Description ............................................................ 206
On Board Diagnosis Logic .................................... 206
Possible Cause ..................................................... 206
DTC Confirmation Procedure  ............................... 206
Wiring Diagram — AT — LC/B  ............................. 207
Diagnostic Procedure  ........................................... 208
Component Inspection .......................................... 210

DTC P1774 LOW COAST BRAKE SOLENOID
VALVE FUNCTION .................................................. 211

Description ............................................................ 211
On Board Diagnosis Logic .................................... 211
Possible Cause ..................................................... 211
DTC Confirmation Procedure  ............................... 211
Wiring Diagram — AT — LC/BF  ........................... 212
Diagnostic Procedure  ........................................... 213

DTC P1815 MANUAL MODE SWITCH .................. 215

Description ............................................................ 215
CONSULT-II Reference Value in Data Monitor Mode

On Board Diagnosis Logic .................................... 215
Possible Cause ..................................................... 215
DTC Confirmation Procedure  ............................... 215
Wiring Diagram — AT — MMSW  ......................... 216
Diagnostic Procedure  ........................................... 217
Component Inspection .......................................... 218
Position Indicator Lamp  ........................................ 218

DTC P1841 ATF PRESSURE SWITCH 1 ............... 219

Description ............................................................ 219
On Board Diagnosis Logic .................................... 219
Possible Cause ..................................................... 219
DTC Confirmation Procedure  ............................... 219
Wiring Diagram — AT — FPSW1  ......................... 220
Diagnostic Procedure  ........................................... 221

DTC P1843 ATF PRESSURE SWITCH 3 ............... 223

Description ............................................................ 223
On Board Diagnosis Logic .................................... 223
Possible Cause ..................................................... 223
DTC Confirmation Procedure  ............................... 223
Wiring Diagram — AT — FPSW3  ......................... 224
Diagnostic Procedure  ........................................... 225

DTC P1845 ATF PRESSURE SWITCH 5 ............... 227

Description ............................................................ 227
On Board Diagnosis Logic .................................... 227
Possible Cause ..................................................... 227
DTC Confirmation Procedure  ............................... 227
Wiring Diagram — AT — FPSW5  ......................... 228
Diagnostic Procedure  ........................................... 229

DTC P1846 ATF PRESSURE SWITCH 6 ............... 231

Description ............................................................ 231
On Board Diagnosis Logic .................................... 231
Possible Cause ..................................................... 231
DTC Confirmation Procedure  ............................... 231
Wiring Diagram — AT — FPSW6  ......................... 232
Diagnostic Procedure  ........................................... 233

PARK/NEUTRAL POSITION, MANUAL MODE,

AT-4

BRAKE AND THROTTLE POSITION SWITCH CIR-
CUIT ........................................................................ 235

Diagnostic Procedure ........................................... 235

TROUBLE DIAGNOSIS FOR SYMPTOMS ............ 237

Wiring Diagram — AT — NONDTC  ...................... 237
A/T CHECK Indicator Lamp does not come on  .... 238
Engine Cannot Be Started In “P” or “N” Position  .. 239
In “P” Position, Vehicle Moves When Pushed  ...... 240
In “N” Position, Vehicle Moves .............................. 241
Large Shock (“N” to “D” Position)  ......................... 242
Vehicle Does Not Creep Backward In “R” Position .245
Vehicle Does Not Creep Forward In “D” Position . 247
Vehicle Cannot Be Started From D

..................... 251

A/T Does Not Shift: D

................................ 253

A/T Does Not Shift: D

................................ 255

A/T Does Not Shift: D

................................ 258

A/T Does Not Shift: D

................................ 260

A/T Does Not Perform Lock-up  ............................ 262
A/T Does Not Hold Lock-up Condition .................. 265
Lock-up Is Not Released  ...................................... 267
Engine Speed Does Not Return To Idle ................ 268
Cannot Be Changed to Manual Mode  .................. 270
A/T Does Not Shift: 5th gear

4th gear .............. 271

A/T Does Not Shift: 4th gear

3rd gear .............. 273

A/T Does Not Shift: 3rd gear

2nd gear ............. 275

A/T Does Not Shift: 2nd gear

1st gear ............. 277

Vehicle Does Not Decelerate By Engine Brake .... 279

SHIFT CONTROL SYSTEM .................................... 281

Control Device Removal and Installation .............. 281
Adjustment of A/T Position ................................... 282
Checking of A/T Position ...................................... 282

A/T SHIFT LOCK SYSTEM ..................................... 283

Description ............................................................ 283
Shift Lock System Electrical Parts Location ......... 283
Wiring Diagram — AT — SHIFT ........................... 284
Shift Lock Control Unit Reference Values ............. 286
Component Inspection .......................................... 286

ON-VEHICLE SERVICE .......................................... 289

Control Valve Assembly ........................................ 289

AIR BREATHER HOSE ...........................................295

Removal and Installation .......................................295

TRANSMISSION ASSEMBLY .................................296

Removal and Installation .......................................296

OVERHAUL .............................................................299

Components ..........................................................299
Oil Channel ...........................................................305
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ..........................306

DISASSEMBLY .......................................................307

Disassembly ..........................................................307

REPAIR FOR COMPONENT PARTS ......................321

Oil Pump  ...............................................................321
Front Sun Gear, 3rd One-Way Clutch  ...................323
Front Carrier, Input Clutch, Rear Internal Gear .....326
Mid Sun Gear, Rear Sun Gear, High and Low
Reverse Clutch Hub ..............................................331
High and Low Reverse Clutch  ..............................336
Direct Clutch  .........................................................337

ASSEMBLY .............................................................339

Assembly (1) .........................................................339
Adjustment ............................................................349
Assembly (2) .........................................................351

SERVICE DATA AND SPECIFICATIONS (SDS) ....357

General Specifications  ..........................................357
Vehicle Speed When Shifting Gears .....................357
Vehicle Speed When Performing and Releasing
Complete Lock-up  .................................................357
Vehicle Speed When Performing and Releasing
Slip Lock-up  ..........................................................357
Stall Speed  ............................................................357
Line Pressure ........................................................358
Solenoid Valves  ....................................................358
A/T Fluid Temperature Sensor  ..............................358
Turbine Revolution Sensor ....................................358
Revolution Sensor .................................................358
Reverse brake .......................................................359
Total End Play  .......................................................359

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