Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2003_Q45 at
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AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
A
B
SECTION
AUTOMATIC TRANSMISSION AT
D
E
CONTENTS
INDEX FOR DTC ....................................................... 5 . Accurate Repair ..................................................... 44
. F
Alphabetical Index ................................................... 5
. A/T Electrical Parts Location ................................. 49 .
DTC No. Index ........................................................ 6
. Circuit Diagram ...................................................... 50
.
PRECAUTIONS ......................................................... 7 . Inspections Before Trouble Diagnosis ................... 51 . G
Precautions for Supplemental Restraint System Check Before Engine is Started ............................. 55 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Check at Idle .......................................................... 55
.
SIONER" ................................................................. 7
. Cruise Test - Part 1 ................................................ 56
.
H
Precautions for On Board Diagnostic (OBD) System Cruise Test - Part 2 ................................................ 58
.
of A/T and Engine ................................................... 7. Cruise Test - Part 3 ................................................ 59
.
Precautions for A/T Assembly Replacement ........... 8 . Vehicle Speed When Shifting Gears ..................... 60 .
Precautions ............................................................. 9
. Vehicle Speed When Performing and Releasing I
Service Notice or Precautions ............................... 10 . Complete Lock-up ................................................. 60 .
Wiring Diagrams and Trouble Diagnosis ................11 . Vehicle Speed When Performing and Releasing
PREPARATION ........................................................ 12 . Slip Lock-up ........................................................... 60
. J
Special Service Tools ............................................ 12 . Symptom Chart ...................................................... 60
.
Commercial Service Tools ..................................... 13 . TCM Input/Output Signal Reference Values .......... 84 .
A/T FLUID ................................................................ 14
. CONSULT-II ........................................................... 86
.
K
Changing A/T Fluid ............................................... 14 . Diagnostic Procedure Without CONSULT-II .......... 98 .
Checking A/T Fluid ................................................ 14 . DTC U1000 CAN COMMUNICATION LINE ........... 100 .
A/T CONTROL SYSTEM ......................................... 16 . Description ........................................................... 100
.
Cross-Sectional View ............................................ 16 . On Board Diagnosis Logic ................................... 100 . L
Shift Mechanism .................................................... 17. Possible Cause .................................................... 100
.
TCM Function ........................................................ 28
. DTC Confirmation Procedure .............................. 100 .
CAN Communication ............................................. 29 . Wiring Diagram -- AT -- CAN ............................. 101 . M
Input/Output Signal of TCM ................................... 31 . Diagnostic Procedure .......................................... 102 .
Line Pressure Control ........................................... 32 . DTC P0615 START SIGNAL CIRCUIT .................. 103 .
Shift Control .......................................................... 34
. Description ........................................................... 103
.
Lock-Up Control .................................................... 35. On Board Diagnosis Logic ................................... 103 .
Engine Brake Control ............................................ 36 . Possible Cause .................................................... 103
.
Control Valve ......................................................... 36
. DTC Confirmation Procedure .............................. 103 .
ON BOARD DIAGNOSTIC (OBD) SYSTEM ........... 38 . Wiring Diagram -- AT -- STSIG ......................... 104 .
Introduction ........................................................... 38
. Diagnostic Procedure .......................................... 105 .
OBD-II Function for A/T System ............................ 38 . DTC P0705 PARK/NEUTRAL POSITION SWITCH. 106
One or Two Trip Detection Logic of OBD-II ........... 38 . Description ........................................................... 106
.
OBD-II Diagnostic Trouble Code (DTC) ................ 38 . On Board Diagnosis Logic ................................... 106 .
Malfunction Indicator Lamp (MIL) .......................... 41 . Possible Cause .................................................... 106
.
TROUBLE DIAGNOSIS ........................................... 42 . DTC Confirmation Procedure .............................. 106 .
DTC Inspection Priority Chart ............................... 42 . Wiring Diagram -- AT -- PNP/SW ...................... 107 .
Fail-Safe ................................................................ 42
. Diagnostic Procedure .......................................... 108 .
How To Perform Trouble Diagnosis For Quick and Component Inspection ......................................... 110 .
Revision; 2004 April AT-1 2003 Q45
DTC P0720 VEHICLE SPEED SENSOR A/T (REV- On Board Diagnosis Logic ................................... 141 .
OLUTION SENSOR) .............................................. 111 . Possible Cause .................................................... 141
.
Description ............................................................111
. DTC Confirmation Procedure ............................... 141 .
On Board Diagnosis Logic ....................................111 . Diagnostic Procedure ........................................... 142 .
Possible Cause .....................................................111 . DTC P1704 TRANSMISSION CONTROL MODULE
DTC Confirmation Procedure ...............................111 . (EEPROM) .............................................................. 143
.
Wiring Diagram -- AT -- VSSA/T ........................ 112 . Description ........................................................... 143
.
Diagnostic Procedure .......................................... 113 . On Board Diagnosis Logic ................................... 143 .
DTC P0725 ENGINE SPEED SIGNAL .................. 116 . Possible Cause .................................................... 143
.
Description ........................................................... 116
. DTC Confirmation Procedure ............................... 143 .
On Board Diagnosis Logic ................................... 116 . Diagnostic Procedure ........................................... 144 .
Possible Cause .................................................... 116 . DTC P1705 THROTTLE POSITION SENSOR ....... 145 .
DTC Confirmation Procedure .............................. 116 . Description ........................................................... 145
.
Diagnostic Procedure .......................................... 116 . On Board Diagnosis Logic ................................... 145 .
DTC P0740 TORQUE CONVERTER CLUTCH Possible Cause .................................................... 145
.
SOLENOID VALVE ................................................ 118 . DTC Confirmation Procedure ............................... 145 .
Description ........................................................... 118
. Diagnostic Procedure ........................................... 145 .
CONSULT-II Reference Value ............................. 118 . DTC P1710 A/T FLUID TEMPERATURE SENSOR
On Board Diagnosis Logic ................................... 118 . CIRCUIT ................................................................. 147
.
Possible Cause .................................................... 118 . Description ........................................................... 147
.
DTC Confirmation Procedure .............................. 118 . CONSULT-II Reference Value .............................. 147 .
Wiring Diagram -- AT -- TCV ............................. 119 . On Board Diagnosis Logic ................................... 147 .
Diagnostic Procedure .......................................... 120 . Possible Cause .................................................... 147
.
Component Inspection ......................................... 121 . DTC Confirmation Procedure ............................... 147 .
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP). 123 Wiring Diagram -- AT -- FTS .............................. 148 .
Description ........................................................... 123
. Diagnostic Procedure ........................................... 149 .
On Board Diagnosis Logic ................................... 123 . Component Inspection ......................................... 152 .
Possible Cause .................................................... 123 . DTC P1716 TURBINE REVOLUTION SENSOR ... 153 .
DTC Confirmation Procedure .............................. 123 . Description ........................................................... 153
.
Wiring Diagram -- AT -- TCCSIG ....................... 124 . On Board Diagnosis Logic ................................... 153 .
Diagnostic Procedure .......................................... 125 . Possible Cause .................................................... 153
.
Component Inspection ......................................... 126 . DTC Confirmation Procedure ............................... 153 .
DTC P0745 LINE PRESSURE SOLENOID VALVE. 128 Wiring Diagram -- AT -- TRSA/T ........................ 154 .
Description ........................................................... 128
. Diagnostic Procedure ........................................... 155 .
On Board Diagnosis Logic ................................... 128 . DTC P1721 VEHICLE SPEED SENSOR MTR ...... 158 .
Possible Cause .................................................... 128 . Description ........................................................... 158
.
DTC Confirmation Procedure .............................. 128 . On Board Diagnosis Logic ................................... 158 .
Wiring Diagram -- AT -- LPSV ........................... 129 . Possible Cause .................................................... 158
.
Diagnostic Procedure .......................................... 130 . DTC Confirmation Procedure ............................... 158 .
Component Inspection ......................................... 131 . Diagnostic Procedure ........................................... 158 .
DTC P1701 TRANSMISSION CONTROL MODULE DTC P1730 A/T INTERLOCK ................................ 160 .
(POWER SUPPLY) ................................................. 133 . Description ........................................................... 160
.
Description ........................................................... 133
. On Board Diagnosis Logic ................................... 160 .
On Board Diagnosis Logic ................................... 133 . Possible Cause .................................................... 160
.
Possible Cause .................................................... 133 . DTC Confirmation Procedure ............................... 160 .
DTC Confirmation Procedure .............................. 133 . Wiring Diagram -- AT -- I/LOCK ......................... 161 .
Wiring Diagram -- AT -- POWER ....................... 134 . Judgement of A/T Interlock .................................. 165 .
Diagnostic Procedure .......................................... 137 . Diagnostic Procedure ........................................... 165 .
Component Inspection ......................................... 138 . DTC P1731 A/T 1ST ENGINE BRAKING .............. 167 .
DTC P1702 TRANSMISSION CONTROL MODULE Description ........................................................... 167
.
(RAM) ..................................................................... 139
. On Board Diagnosis Logic ................................... 167 .
Description ........................................................... 139
. Possible Cause .................................................... 167
.
On Board Diagnosis Logic ................................... 139 . DTC Confirmation Procedure ............................... 167 .
Possible Cause .................................................... 139 . Wiring Diagram -- AT -- E/BRE .......................... 168 .
DTC Confirmation Procedure .............................. 139 . Diagnostic Procedure ........................................... 169 .
Diagnostic Procedure .......................................... 140 . DTC P1752 INPUT CLUTCH SOLENOID VALVE . 171
DTC P1703 TRANSMISSION CONTROL MODULE Description ........................................................... 171
.
(ROM) ..................................................................... 141
. On Board Diagnosis Logic ................................... 171 .
Description ........................................................... 141
. Possible Cause .................................................... 171
.
Revision; 2004 April AT-2 2003 Q45
DTC Confirmation Procedure .............................. 171 . Wiring Diagram -- AT -- HLR/CF ....................... 204 .
Wiring Diagram -- AT -- I/C ............................... 172 . Diagnostic Procedure .......................................... 205 . A
Diagnostic Procedure .......................................... 173 . DTC P1772 LOW COAST BRAKE SOLENOID
Component Inspection ........................................ 175 . VALVE .................................................................... 207
.
DTC P1754 INPUT CLUTCH SOLENOID VALVE Description ........................................................... 207
. B
FUNCTION ............................................................. 176
. On Board Diagnosis Logic ................................... 207 .
Description .......................................................... 176
. Possible Cause .................................................... 207 .
On Board Diagnosis Logic .................................. 176 . DTC Confirmation Procedure .............................. 207 .
Possible Cause ................................................... 176
. Wiring Diagram -- AT -- LC/B ............................ 208 . AT
DTC Confirmation Procedure .............................. 176 . Diagnostic Procedure .......................................... 209 .
Wiring Diagram -- AT -- I/CF ............................. 177 . Component Inspection ......................................... 211 .
Diagnostic Procedure .......................................... 178 . DTC P1774 LOW COAST BRAKE SOLENOID D
DTC P1757 FRONT BRAKE SOLENOID VALVE . 180 VALVE FUNCTION ................................................. 212 .
Description .......................................................... 180
. Description ........................................................... 212
.
On Board Diagnosis Logic .................................. 180 . On Board Diagnosis Logic ................................... 212 . E
Possible Cause ................................................... 180
. Possible Cause .................................................... 212 .
DTC Confirmation Procedure .............................. 180 . DTC Confirmation Procedure .............................. 212 .
Wiring Diagram -- AT -- FR/B ............................ 181 . Wiring Diagram -- AT -- LC/BF .......................... 213 .
Diagnostic Procedure .......................................... 182 . Diagnostic Procedure .......................................... 214 . F
Component Inspection ........................................ 184 . DTC P1815 MANUAL MODE SWITCH ................. 216 .
DTC P1759 FRONT BRAKE SOLENOID VALVE Description ........................................................... 216
.
FUNCTION ............................................................. 185
. CONSULT-II Reference Value in Data Monitor Mode G
Description .......................................................... 185
. . 216
On Board Diagnosis Logic .................................. 185 . On Board Diagnosis Logic ................................... 216 .
Possible Cause ................................................... 185
. Possible Cause .................................................... 216 . H
DTC Confirmation Procedure .............................. 185 . DTC Confirmation Procedure .............................. 216 .
Wiring Diagram -- AT -- FR/BF .......................... 186 . Wiring Diagram -- AT -- MMSW ........................ 217 .
Diagnostic Procedure .......................................... 187 . Diagnostic Procedure .......................................... 218 .
I
DTC P1762 DIRECT CLUTCH SOLENOID VALVE 189 . Component Inspection ......................................... 219 .
Description .......................................................... 189
. Position Indicator Lamp ....................................... 219 .
On Board Diagnosis Logic .................................. 189 . DTC P1841 ATF PRESSURE SWITCH 1 .............. 220 .
Possible Cause ................................................... 189
. Description ........................................................... 220
. J
DTC Confirmation Procedure .............................. 189 . On Board Diagnosis Logic ................................... 220 .
Wiring Diagram -- AT -- D/C .............................. 190 . Possible Cause .................................................... 220 .
Diagnostic Procedure .......................................... 191 . DTC Confirmation Procedure .............................. 220 . K
Component Inspection ........................................ 193 . Wiring Diagram -- AT -- FPSW1 ........................ 221 .
DTC P1764 DIRECT CLUTCH SOLENOID VALVE Diagnostic Procedure .......................................... 222 .
FUNCTION ............................................................. 194
. DTC P1843 ATF PRESSURE SWITCH 3 .............. 224 . L
Description .......................................................... 194
. Description ........................................................... 224
.
On Board Diagnosis Logic .................................. 194 . On Board Diagnosis Logic ................................... 224 .
Possible Cause ................................................... 194
. Possible Cause .................................................... 224 .
DTC Confirmation Procedure .............................. 194 . DTC Confirmation Procedure .............................. 224 . M
Wiring Diagram -- AT -- D/CF ............................ 195 . Wiring Diagram -- AT -- FPSW3 ........................ 225 .
Diagnostic Procedure .......................................... 196 . Diagnostic Procedure .......................................... 226 .
DTC P1767 HIGH AND LOW REVERSE CLUTCH DTC P1845 ATF PRESSURE SWITCH 5 .............. 228 .
SOLENOID VALVE ................................................ 198 . Description ........................................................... 228
.
Description .......................................................... 198
. On Board Diagnosis Logic ................................... 228 .
On Board Diagnosis Logic .................................. 198 . Possible Cause .................................................... 228 .
Possible Cause ................................................... 198
. DTC Confirmation Procedure .............................. 228 .
DTC Confirmation Procedure .............................. 198 . Wiring Diagram -- AT -- FPSW5 ........................ 229 .
Wiring Diagram -- AT -- HLR/C ......................... 199 . Diagnostic Procedure .......................................... 230 .
Diagnostic Procedure .......................................... 200 . DTC P1846 ATF PRESSURE SWITCH 6 .............. 232 .
Component Inspection ........................................ 202 . Description ........................................................... 232
.
DTC P1769 HIGH AND LOW REVERSE CLUTCH On Board Diagnosis Logic ................................... 232 .
SOLENOID VALVE FUNCTION ............................ 203 . Possible Cause .................................................... 232 .
Description .......................................................... 203
. DTC Confirmation Procedure .............................. 232 .
On Board Diagnosis Logic .................................. 203 . Wiring Diagram -- AT -- FPSW6 ........................ 233 .
Possible Cause ................................................... 203
. Diagnostic Procedure .......................................... 234 .
DTC Confirmation Procedure .............................. 203 . PARK/NEUTRAL POSITION, MANUAL MODE,
Revision; 2004 April AT-3 2003 Q45
BRAKE AND THROTTLE POSITION SWITCH CIR- AIR BREATHER HOSE .......................................... 296 .
CUIT ....................................................................... 236
. Removal and Installation ...................................... 296 .
Diagnostic Procedure .......................................... 236 . TRANSMISSION ASSEMBLY ................................ 297 .
TROUBLE DIAGNOSIS FOR SYMPTOMS ........... 238 . Removal and Installation ...................................... 297 .
Wiring Diagram -- AT -- NONDTC ..................... 238 . OVERHAUL ............................................................ 300
.
A/T CHECK Indicator Lamp Does Not Come On . 239 Components ......................................................... 300
.
Engine Cannot Be Started In "P" or "N" Position . 240 Oil Channel .......................................................... 306
.
In "P" Position, Vehicle Moves When Pushed ..... 241 . Locations of Adjusting Shims, Needle Bearings,
In "N" Position, Vehicle Moves ............................. 242 . Thrust Washers and Snap Rings ......................... 307 .
Large Shock ("N" to "D" Position) ........................ 243 . DISASSEMBLY ...................................................... 308 .
Vehicle Does Not Creep Backward In "R" Position. 246 Disassembly ......................................................... 308
.
Vehicle Does Not Creep Forward In "D" Position . 248 REPAIR FOR COMPONENT PARTS ..................... 322 .
Vehicle Cannot Be Started From D1 .................... 252 . Oil Pump .............................................................. 322
.
A/T Does Not Shift: D1 D2 ............................... 254 . Front Sun Gear, 3rd One-Way Clutch .................. 324 .
A/T Does Not Shift: D2 D3 ............................... 256 . Front Carrier, Input Clutch, Rear Internal Gear .... 327 .
A/T Does Not Shift: D3 D4 ............................... 259 . Mid Sun Gear, Rear Sun Gear, High and Low
A/T Does Not Shift: D4 D5 ............................... 261 . Reverse Clutch Hub ............................................. 332 .
A/T Does Not Perform Lock-up ........................... 263 . High and Low Reverse Clutch ............................. 337 .
A/T Does Not Hold Lock-up Condition ................. 266 . Direct Clutch ........................................................ 338
.
Lock-up Is Not Released ..................................... 268 . ASSEMBLY ............................................................ 340
.
Engine Speed Does Not Return To Idle ............... 269 . Assembly (1) ........................................................ 340
.
Cannot Be Changed to Manual Mode ................. 271 . Adjustment ........................................................... 350
.
A/T Does Not Shift: 5th gear 4th gear ............. 272 . Assembly (2) ........................................................ 352
.
A/T Does Not Shift: 4th gear 3rd gear ............. 274 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 358 .
A/T Does Not Shift: 3rd gear 2nd gear ............ 276 . General Specifications ......................................... 358 .
A/T Does Not Shift: 2nd gear 1st gear ............ 278 . Vehicle Speed When Shifting Gears .................... 358 .
Vehicle Does Not Decelerate By Engine Brake ... 280 . Vehicle Speed When Performing and Releasing
SHIFT CONTROL SYSTEM ................................... 282 . Complete Lock-up ................................................ 358 .
Control Device Removal and Installation ............. 282 . Vehicle Speed When Performing and Releasing
Adjustment of A/T Position .................................. 283 . Slip Lock-up ......................................................... 358
.
Checking of A/T Position ..................................... 283 . Stall Speed ........................................................... 358
.
A/T SHIFT LOCK SYSTEM .................................... 284 . Line Pressure ....................................................... 359
.
Description ........................................................... 284
. Solenoid Valves ................................................... 359
.
Shift Lock System Electrical Parts Location ........ 284 . A/T Fluid Temperature Sensor ............................. 359 .
Wiring Diagram -- AT -- SHIFT .......................... 285 . Turbine Revolution Sensor ................................... 359 .
Shift Lock Control Unit Reference Values ............ 287 . Revolution Sensor ................................................ 359.
Component Inspection ......................................... 287 . Reverse Brake ..................................................... 360
.
ON-VEHICLE SERVICE ......................................... 290 . Total End Play ...................................................... 360
.
Control Valve Assembly ....................................... 290 .
Revision; 2004 April AT-4 2003 Q45
INDEX FOR DTC
INDEX FOR DTC PFP:00024
A
Alphabetical Index ECS0082C
NOTE:
If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to B
AT-100 .
DTC
Items OBD-II Except OBD-II AT
Reference page
(CONSULT-II screen terms)
CONSULT-II CONSULT-II
GST*1 only "A/T"
A/T 1ST E/BRAKING -- P1731 AT-167 D
ATF PRES SW 1/CIRC -- P1841 AT-220
ATF PRES SW 3/CIRC -- P1843 AT-224
E
ATF PRES SW 5/CIRC -- P1845 AT-228
ATF PRES SW 6/CIRC -- P1846 AT-232
A/T INTERLOCK P1730 P1730 AT-160 F
A/T TCC S/V FNCTN P0744 P0744 AT-123
ATF TEMP SEN/CIRC P0710 P1710 AT-147
G
CAN COMM CIRCUIT U1000 U1000 AT-100
D/C SOLENOID/CIRC P1762 P1762 AT-189
D/C SOLENOID FNCTN P1764 P1764 AT-194 H
ENGINE SPEED SIG -- P0725 AT-116
FR/B SOLENOID/CIRC P1757 P1757 AT-180
I
FR/B SOLENOID FNCT P1759 P1759 AT-185
HLR/C SOL/CIRC P1767 P1767 AT-198
HLR/C SOL FNCTN P1769 P1769 AT-203 J
I/C SOLENOID/CIRC P1752 P1752 AT-171
I/C SOLENOID FNCTN P1754 P1754 AT-176
L/PRESS SOL/CIRC P0745 P0745 AT-128 K
LC/B SOLENOID/CIRC P1772 P1772 AT-207
LC/B SOLENOID FNCT P1774 P1774 AT-212
L
MANU MODE SW/CIR -- P1815 AT-216
PNP SW/CIRC P0705 P0705 AT-106
STARTER RELAY/CIRC -- P0615 AT-103 M
TCC SOLENOID/CIRC P0740 P0740 AT-118
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