Infiniti Q45. Manual — part 22

AT-1

AUTOMATIC TRANSMISSION

C TRANSMISSION/TRANSAXLE

CONTENTS

D

E

F

G

H

I

J

K

L

M

SECTION

AT

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 . . . . . . . . . . . . . . . .. 8
Service Notice or Precautions . . . . . . . . .. 9

PREPARATION . . . . . . . . . . . . . . . 10

Special Service Tools . . . . . . . . . . . . 10
Commercial Service Tools . . . . . . . . . ...11

A/T FLUID . . . . . . . . . . . . . . . . . 12

Changing A/T Fluid . . . . . . . . . . . . 12
Checking A/T Fluid . . . . . . . . . . . . . 13
A/T Fluid Cooler Cleaning . . . . . . . . . .. 14

A/T CONTROL SYSTEM . . . . . . . . . . .. 17

Cross-Sectional View . . . . . . . . . . . . 17
Shift Mechanism . . . . . . . . . . . . . . 18
TCM Function . . . . . . . . . . . . . . . 29
CAN Communication . . . . . . . . . . . .. 30
Input/Output Signal of TCM . . . . . . . . . 30
Line Pressure Control . . . . . . . . . . . 31
Shift Control . . . . . . . . . . . . . . ... 32
Lock-up Control . . . . . . . . . . . . . .. 34
Engine Brake Control . . . . . . . . . . . . 35
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 . . . . . . . . . . . . . 57
Cruise Test - Part 2 . . . . . . . . . . . . . 59
Cruise Test - Part 3 . . . . . . . . . . . . . 59
Vehicle Speed at Which Gear Shifting Occurs . ... 60
Vehicle Speed at Which Lock-up Occurs/Releases

... 60

Symptom Chart . . . . . . . . . . . . . ... 61
TCM Input/Output Signal Reference Values . . ... 84
CONSULT-II Function (A/T) . . . . . . . . . 85
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
CONSULT-II Reference Value . . . . . . . .. 102
On Board Diagnosis Logic . . . . . . . . . 102
Possible Cause . . . . . . . . . . . . . . 102
DTC Confirmation Procedure . . . . . . . ... 102
Wiring Diagram — AT — STSIG . . . . . . .. 103
Diagnostic Procedure . . . . . . . . . . ... 104

DTC P0700 TCM . . . . . . . . . . . . . . 106

Description . . . . . . . . . . . . . . . 106
On Board Diagnosis Logic . . . . . . . . . 106
Possible Cause . . . . . . . . . . . . . . 106
DTC Confirmation Procedure . . . . . . . ... 106
Diagnostic Procedure . . . . . . . . . . ... 106

DTC P0705 PARK/NEUTRAL POSITION SWITCH .107

Description . . . . . . . . . . . . . . . 107
CONSULT-II Reference Value . . . . . . . .. 107
On Board Diagnosis Logic . . . . . . . . . 107
Possible Cause . . . . . . . . . . . . . . 107

AT-2

DTC Confirmation Procedure . . . . . . . ... 107
Wiring Diagram — AT — PNP/SW . . . . . ... 108
Diagnostic Procedure . . . . . . . . . . ... 109

DTC P0717 TURBINE REVOLUTION SENSOR . 111

Description . . . . . . . . . . . . . . . .111
CONSULT-II Reference Value . . . . . . . ...111
On Board Diagnosis Logic . . . . . . . . . .111
Possible Cause . . . . . . . . . . . . . ..111
DTC Confirmation Procedure . . . . . . . . 111
Diagnostic Procedure . . . . . . . . . . ... 112

DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) . . . . . . . . . . . ... 113

Description . . . . . . . . . . . . . . . 113
CONSULT-II Reference Value . . . . . . . .. 113
On Board Diagnosis Logic . . . . . . . . . 113
Possible Cause . . . . . . . . . . . . . . 113
DTC Confirmation Procedure . . . . . . . ... 113
Wiring Diagram — AT — VSSA/T . . . . . . . 115
Diagnostic Procedure . . . . . . . . . . ... 116

DTC P0725 ENGINE SPEED SIGNAL . . . . ... 118

Description . . . . . . . . . . . . . . . 118
CONSULT-II Reference Value . . . . . . . .. 118
On Board Diagnosis Logic . . . . . . . . . 118
Possible Cause . . . . . . . . . . . . . . 118
DTC Confirmation Procedure . . . . . . . ... 118
Diagnostic Procedure . . . . . . . . . . ... 119

DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE . . . . . . . . . . . . . 120

Description . . . . . . . . . . . . . . . 120
CONSULT-II Reference Value . . . . . . . .. 120
On Board Diagnosis Logic . . . . . . . . . 120
Possible Cause . . . . . . . . . . . . . . 120
DTC Confirmation Procedure . . . . . . . ... 120
Diagnostic Procedure . . . . . . . . . . ... 121

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

Description . . . . . . . . . . . . . . . 122
CONSULT-II Reference Value . . . . . . . .. 122
On Board Diagnosis Logic . . . . . . . . . 122
Possible Cause . . . . . . . . . . . . . . 122
DTC Confirmation Procedure . . . . . . . ... 122
Diagnostic Procedure . . . . . . . . . . ... 123

DTC P0745 LINE PRESSURE SOLENOID VALVE .124

Description . . . . . . . . . . . . . . . 124
CONSULT-II Reference Value . . . . . . . .. 124
On Board Diagnosis Logic . . . . . . . . . 124
Possible Cause . . . . . . . . . . . . . . 124
DTC Confirmation Procedure . . . . . . . ... 124
Diagnostic Procedure . . . . . . . . . . ... 125

DTC P1705 THROTTLE POSITION SENSOR . ... 126

Description . . . . . . . . . . . . . . . 126
CONSULT-II Reference Value . . . . . . . .. 126
On Board Diagnosis Logic . . . . . . . . . 126
Possible Cause . . . . . . . . . . . . . . 126
DTC Confirmation Procedure . . . . . . . ... 126
Diagnostic Procedure . . . . . . . . . . ... 127

DTC P1710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT . . . . . . . . . . . . . . . . .. 129

Description . . . . . . . . . . . . . . . 129
CONSULT-II Reference Value . . . . . . . .. 129

On Board Diagnosis Logic . . . . . . . . . 129
Possible Cause . . . . . . . . . . . . . .129
DTC Confirmation Procedure . . . . . . . . 129
Wiring Diagram — AT — FTS . . . . . . . ...130
Diagnostic Procedure . . . . . . . . . . . 131
Component Inspection . . . . . . . . . . ..133

DTC P1721 VEHICLE SPEED SENSOR MTR . ...134

Description . . . . . . . . . . . . . . . 134
CONSULT-II Reference Value . . . . . . . ...134
On Board Diagnosis Logic . . . . . . . . . 134
Possible Cause . . . . . . . . . . . . . .134
DTC Confirmation Procedure . . . . . . . . 134
Diagnostic Procedure . . . . . . . . . . . 135

DTC P1730 A/T INTERLOCK . . . . . . . . .136

Description . . . . . . . . . . . . . . . 136
On Board Diagnosis Logic . . . . . . . . . 136
Possible Cause . . . . . . . . . . . . . .136
DTC Confirmation Procedure . . . . . . . . 136
Judgement of A/T Interlock . . . . . . . . ...137
Diagnostic Procedure . . . . . . . . . . . 137

DTC P1731 A/T 1ST ENGINE BRAKING . . . ...139

Description . . . . . . . . . . . . . . . 139
CONSULT-II Reference Value . . . . . . . ...139
On Board Diagnosis Logic . . . . . . . . . 139
Possible Cause . . . . . . . . . . . . . .139
DTC Confirmation Procedure . . . . . . . . 139
Diagnostic Procedure . . . . . . . . . . . 140

DTC P1752 INPUT CLUTCH SOLENOID VALVE ..141

Description . . . . . . . . . . . . . . . 141
CONSULT-II Reference Value . . . . . . . ...141
On Board Diagnosis Logic . . . . . . . . . 141
Possible Cause . . . . . . . . . . . . . .141
DTC Confirmation Procedure . . . . . . . . 141
Diagnostic Procedure . . . . . . . . . . . 142

DTC P1754 INPUT CLUTCH SOLENOID VALVE
FUNCTION . . . . . . . . . . . . . . . ..143

Description . . . . . . . . . . . . . . . 143
CONSULT-II Reference Value . . . . . . . ...143
On Board Diagnosis Logic . . . . . . . . . 143
Possible Cause . . . . . . . . . . . . . .143
DTC Confirmation Procedure . . . . . . . . 143
Diagnostic Procedure . . . . . . . . . . . 144

DTC P1757 FRONT BRAKE SOLENOID VALVE ...145

Description . . . . . . . . . . . . . . . 145
CONSULT-II Reference Value . . . . . . . ...145
On Board Diagnosis Logic . . . . . . . . . 145
Possible Cause . . . . . . . . . . . . . .145
DTC Confirmation Procedure . . . . . . . . 145
Diagnostic Procedure . . . . . . . . . . . 146

DTC P1759 FRONT BRAKE SOLENOID VALVE
FUNCTION . . . . . . . . . . . . . . . ..147

Description . . . . . . . . . . . . . . . 147
CONSULT-II Reference Value . . . . . . . ...147
On Board Diagnosis Logic . . . . . . . . . 147
Possible Cause . . . . . . . . . . . . . .147
DTC Confirmation Procedure . . . . . . . . 147
Diagnostic Procedure . . . . . . . . . . . 148

DTC P1762 DIRECT CLUTCH SOLENOID VALVE .149

Description . . . . . . . . . . . . . . . 149

AT-3

D

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G

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M

A

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AT

CONSULT-II Reference Value . . . . . . . .. 149
On Board Diagnosis Logic . . . . . . . . ... 149
Possible Cause . . . . . . . . . . . . . 149
DTC Confirmation Procedure . . . . . . . ... 149
Diagnostic Procedure . . . . . . . . . . ... 150

DTC P1764 DIRECT CLUTCH SOLENOID VALVE
FUNCTION . . . . . . . . . . . . . . . .. 151

Description . . . . . . . . . . . . . . ... 151
CONSULT-II Reference Value . . . . . . . .. 151
On Board Diagnosis Logic . . . . . . . . ... 151
Possible Cause . . . . . . . . . . . . . 151
DTC Confirmation Procedure . . . . . . . ... 151
Diagnostic Procedure . . . . . . . . . . ... 152

DTC P1767 HIGH AND LOW REVERSE CLUTCH
SOLENOID VALVE . . . . . . . . . . . . . 153

Description . . . . . . . . . . . . . . ... 153
CONSULT-II Reference Value . . . . . . . .. 153
On Board Diagnosis Logic . . . . . . . . ... 153
Possible Cause . . . . . . . . . . . . . 153
DTC Confirmation Procedure . . . . . . . ... 153
Diagnostic Procedure . . . . . . . . . . ... 154

DTC P1769 HIGH AND LOW REVERSE CLUTCH
SOLENOID VALVE FUNCTION . . . . . . . . 155

Description . . . . . . . . . . . . . . ... 155
CONSULT-II Reference Value . . . . . . . .. 155
On Board Diagnosis Logic . . . . . . . . ... 155
Possible Cause . . . . . . . . . . . . . 155
DTC Confirmation Procedure . . . . . . . ... 155
Diagnostic Procedure . . . . . . . . . . ... 156

DTC P1772 LOW COAST BRAKE SOLENOID
VALVE . . . . . . . . . . . . . . . . . . 157

Description . . . . . . . . . . . . . . ... 157
CONSULT-II Reference Value . . . . . . . .. 157
On Board Diagnosis Logic . . . . . . . . ... 157
Possible Cause . . . . . . . . . . . . . 157
DTC Confirmation Procedure . . . . . . . ... 157
Diagnostic Procedure . . . . . . . . . . ... 158

DTC P1774 LOW COAST BRAKE SOLENOID
VALVE FUNCTION . . . . . . . . . . . . . 159

Description . . . . . . . . . . . . . . ... 159
CONSULT-II Reference Value . . . . . . . .. 159
On Board Diagnosis Logic . . . . . . . . ... 159
Possible Cause . . . . . . . . . . . . . 159
DTC Confirmation Procedure . . . . . . . ... 159
Diagnostic Procedure . . . . . . . . . . ... 160

DTC P1815 MANUAL MODE SWITCH . . . . .. 161

Description . . . . . . . . . . . . . . ... 161
CONSULT-II Reference Value . . . . . . . .. 161
On Board Diagnosis Logic . . . . . . . . ... 161
Possible Cause . . . . . . . . . . . . . 161
DTC Confirmation Procedure . . . . . . . ... 161
Wiring Diagram — AT — MMSW . . . . . . . 162
Diagnostic Procedure . . . . . . . . . . ... 163
Component Inspection . . . . . . . . . . . 164

DTC P1841 ATF PRESSURE SWITCH 1 . . . ... 165

Description . . . . . . . . . . . . . . ... 165
CONSULT-II Reference Value . . . . . . . .. 165
On Board Diagnosis Logic . . . . . . . . ... 165
Possible Cause . . . . . . . . . . . . . 165

DTC Confirmation Procedure . . . . . . . ... 165
Diagnostic Procedure . . . . . . . . . . ... 166

DTC P1843 ATF PRESSURE SWITCH 3 . . . ... 167

Description . . . . . . . . . . . . . . . 167
CONSULT-II Reference Value . . . . . . . .. 167
On Board Diagnosis Logic . . . . . . . . . 167
Possible Cause . . . . . . . . . . . . . . 167
DTC Confirmation Procedure . . . . . . . ... 167
Diagnostic Procedure . . . . . . . . . . ... 168

DTC P1845 ATF PRESSURE SWITCH 5 . . . ... 169

Description . . . . . . . . . . . . . . . 169
CONSULT-II Reference Value . . . . . . . .. 169
On Board Diagnosis Logic . . . . . . . . . 169
Possible Cause . . . . . . . . . . . . . . 169
DTC Confirmation Procedure . . . . . . . ... 169
Diagnostic Procedure . . . . . . . . . . ... 170

DTC P1846 ATF PRESSURE SWITCH 6 . . . ... 171

Description . . . . . . . . . . . . . . . 171
CONSULT-II Reference Value . . . . . . . .. 171
On Board Diagnosis Logic . . . . . . . . . 171
Possible Cause . . . . . . . . . . . . . . 171
DTC Confirmation Procedure . . . . . . . ... 171
Diagnostic Procedure . . . . . . . . . . ... 172

MAIN POWER SUPPLY AND GROUND CIRCUIT . 173

Wiring Diagram — AT — MAIN . . . . . . . 173
Diagnostic Procedure . . . . . . . . . . ... 174

CLOSED THROTTLE POSITION AND WIDE OPEN
THROTTLE POSITION CIRCUIT . . . . . . . 177

CONSULT-II Reference Value . . . . . . . .. 177
Diagnostic Procedure . . . . . . . . . . ... 177

BRAKE SIGNAL CIRCUIT . . . . . . . . . .. 178

CONSULT-II Reference Value . . . . . . . .. 178
Diagnostic Procedure . . . . . . . . . . ... 178

A/T INDICATOR CIRCUIT . . . . . . . . . ... 179

Description . . . . . . . . . . . . . . . 179
CONSULT-II Reference Value . . . . . . . .. 179
Diagnostic Procedure . . . . . . . . . . ... 179

TROUBLE DIAGNOSIS FOR SYMPTOMS . . . 180

Wiring Diagram — AT — NONDTC . . . . . .. 180
A/T CHECK Indicator Lamp Does Not Come On . 183
Engine Cannot Be Started In “P” or “N” Position .. 183
In “P” Position, Vehicle Moves When Pushed . .. 184
In “N” Position, Vehicle Moves . . . . . . . .. 185
Large Shock (“N” to “D” Position) . . . . . . . 186
Vehicle Does Not Creep Backward In “R” Position .188
Vehicle Does Not Creep Forward In “D” Position . 190
Vehicle Cannot Be Started from D

1

. . . . . .. 192

A/T Does Not Shift: D

1

→

D

2

. . . . . . . . 194

A/T Does Not Shift: D

2

→

D

3

. . . . . . . . 196

A/T Does Not Shift: D

3

→

D

4

. . . . . . . . 198

A/T Does Not Shift: D

4

→

D

5

. . . . . . . . 200

A/T Does Not Lock-up . . . . . . . . . . .. 202
A/T Does Not Hold Lock-up Condition . . . . .. 203
Lock-up Is Not Released . . . . . . . . . .. 205
Engine Speed Does Not Return to Idle . . . . 205
Cannot Be Changed to Manual Mode . . . . .. 206
A/T Does Not Shift: 5th Gear

→

4th Gear . . . 207

A/T Does Not Shift: 4th Gear

→

3rd Gear . . . 208

A/T Does Not Shift: 3rd Gear

→

2nd Gear . . ... 210

AT-4

A/T Does Not Shift: 2nd Gear

→

1st Gear . . . 211

Vehicle Does Not Decelerate By Engine Brake . 212

SHIFT CONTROL SYSTEM . . . . . . . . . 215

Control Device Removal and Installation . . . .. 215
Control Rod Removal and Installation . . . . .. 217
Adjustment of A/T Position . . . . . . . . ... 218
Checking of A/T Position . . . . . . . . . .. 218

A/T SHIFT LOCK SYSTEM . . . . . . . . . . 219

Description . . . . . . . . . . . . . . . 219
Shift Lock System Electrical Parts Location . . . 219
Wiring Diagram — AT — SHIFT . . . . . . ... 220
Shift Lock Control Unit Reference Values . . . . 222
Component Inspection . . . . . . . . . . .. 223

ON-VEHICLE SERVICE . . . . . . . . . . .. 225

Control Valve with TCM and A/T Fluid Temperature
Sensor 2 . . . . . . . . . . . . . . . ... 225
Parking Components . . . . . . . . . . . 237
Revolution Sensor . . . . . . . . . . . . 242

AIR BREATHER HOSE . . . . . . . . . . ... 248

Removal and Installation . . . . . . . . . .. 248

TRANSMISSION ASSEMBLY . . . . . . . . 249

Removal and Installation . . . . . . . . . .. 249

OVERHAUL . . . . . . . . . . . . . . . . 253

Components . . . . . . . . . . . . . . . 253
Oil Channel . . . . . . . . . . . . . . ... 259
Locations of Adjusting Shims, Needle Bearings,

Thrust Washers and Snap Rings . . . . . . ..260

DISASSEMBLY . . . . . . . . . . . . . ...261

Disassembly . . . . . . . . . . . . . . ..261

REPAIR FOR COMPONENT PARTS . . . . . ..277

Oil Pump . . . . . . . . . . . . . . . ...277
Front Sun Gear, 3rd One-way Clutch . . . . . 280
Front Carrier, Input Clutch, Rear Internal Gear . .282
Mid Sun Gear, Rear Sun Gear, High and Low
Reverse Clutch Hub . . . . . . . . . . . ..287
High and Low Reverse Clutch . . . . . . . ..292
Direct Clutch . . . . . . . . . . . . . . .294

ASSEMBLY . . . . . . . . . . . . . . . .296

Assembly (1) . . . . . . . . . . . . . . .296
Adjustment . . . . . . . . . . . . . . . 307
Assembly (2) . . . . . . . . . . . . . . .310

SERVICE DATA AND SPECIFICATIONS (SDS) . 317

General Specifications . . . . . . . . . . ..317
Vehicle Speed at Which Gear Shifting Occurs . ..317
Vehicle Speed at Which Lock-up Occurs/Releases .317
Stall Speed . . . . . . . . . . . . . . . 317
Line Pressure . . . . . . . . . . . . . . 317
A/T Fluid Temperature Sensor . . . . . . . ..318
Turbine Revolution Sensor . . . . . . . . . 318
Vehicle Speed Sensor A/T (Revolution Sensor) ...318
Reverse Brake . . . . . . . . . . . . . ..318
Total End Play . . . . . . . . . . . . . ...318