Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti Q45 FY33 F50 2001-2006 Approved 2002_Q45 at
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AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
A
AUTOMATIC TRANSMISSION
SECTION AT B
AT
D
E
CONTENTS
INDEX FOR DTC ....................................................... 5 . Accurate Repair ..................................................... 42 . F
Alphabetical Index ................................................... 5
. A/T Electrical Parts Location ................................. 48 .
DTC No. Index ........................................................ 6
. Circuit Diagram ...................................................... 49 .
PRECAUTIONS ......................................................... 7 . Inspections Before Trouble Diagnosis ................... 50 . G
Precautions for Supplemental Restraint System Check Before Engine is Started ............................. 54 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Check at Idle .......................................................... 54.
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 Throttle Posi-
Precautions ............................................................. 9
. tion ......................................................................... 59
. I
Service Notice or Precautions ............................... 10 . Vehicle Speed When Performing and Releasing
Wiring Diagrams and Trouble Diagnosis ............... 10 . Complete Lock-up ................................................. 59 .
PREPARATION .........................................................11 . Vehicle Speed When Performing and Releasing J
Special Service Tools .............................................11 . Slip Lock-up ........................................................... 59.
Commercial Service Tools ......................................11 . Symptom Chart ...................................................... 60 .
A/T FLUID ................................................................ 12
. TCM Input/Output Signal Reference Values .......... 64 .
K
Changing A/T Fluid ............................................... 12 . CONSULT-II ........................................................... 67 .
Checking A/T Fluid ................................................ 12 . Diagnostic Procedure Without CONSULT-II .......... 76 .
A/T CONTROL SYSTEM ......................................... 14 . DTC U1000 CAN COMMUNICATION LINE ............. 79 .
Cross-Sectional View ............................................ 14 . Description ............................................................. 79
. L
Hydraulic Control Circuit ....................................... 15 . On Board Diagnosis Logic ..................................... 79 .
Shift Mechanism .................................................... 16. Possible Cause ...................................................... 79 .
TCM Function ........................................................ 27
. DTC Confirmation Procedure ................................ 79 . M
CAN Communication ............................................. 28 . Wiring Diagram -- AT -- CAN ............................... 80 .
Line Pressure Control ........................................... 30 . Diagnostic Procedure ............................................ 81 .
Shift Control .......................................................... 32
. DTC P0615 START SIGNAL CIRCUIT .................... 82 .
Lock-Up Control .................................................... 33. Description ............................................................. 82
.
Engine Brake Control ............................................ 34 . On Board Diagnosis Logic ..................................... 82 .
Control Valve ......................................................... 34
. Possible Cause ...................................................... 82 .
ON BOARD DIAGNOSTIC (OBD) SYSTEM ........... 36 . DTC Confirmation Procedure ................................ 82 .
Introduction ........................................................... 36
. Wiring Diagram -- AT -- STSIG ........................... 83 .
OBD-II Function for A/T System ............................ 36 . Diagnostic Procedure ............................................ 84 .
One or Two Trip Detection Logic of OBD-II ........... 36 . DTC P0705 PARK/NEUTRAL POSITION SWITCH... 85
OBD-II Diagnostic Trouble Code (DTC) ................ 36 . Description ............................................................. 85
.
Malfunction Indicator Lamp (MIL) .......................... 39 . On Board Diagnosis Logic ..................................... 85 .
TROUBLE DIAGNOSIS ........................................... 40 . Possible Cause ...................................................... 85 .
DTC Inspection Priority Chart ............................... 40 . DTC Confirmation Procedure ................................ 85 .
Fail-Safe ................................................................ 40
. Wiring Diagram -- AT -- PNP/SW ........................ 86 .
How To Perform Trouble Diagnosis For Quick and
Revision: 2004 April AT-1 2002 Q45
Diagnostic Procedure ............................................ 87 . DTC Confirmation Procedure ............................... 112 .
Component Inspection ........................................... 88 . Diagnostic Procedure ........................................... 113 .
DTC P0720 VEHICLE SPEED SENSOR A/T (REV- DTC P1704 TRANSMISSION CONTROL MODULE
OLUTION SENSOR) ................................................ 89 . (EEPROM) .............................................................. 114
.
Description ............................................................. 89
. Description ........................................................... 114
.
On Board Diagnosis Logic ..................................... 89 . On Board Diagnosis Logic ................................... 114 .
Possible Cause ...................................................... 89. Possible Cause .................................................... 114
.
DTC Confirmation Procedure ................................ 89 . DTC Confirmation Procedure ............................... 114 .
Wiring Diagram -- AT -- VSSA/T .......................... 90 . Diagnostic Procedure ........................................... 115 .
Diagnostic Procedure ............................................ 91 . DTC P1705 THROTTLE POSITION SENSOR ....... 116 .
DTC P0725 ENGINE SPEED SIGNAL .................... 92 . Description ........................................................... 116
.
Description ............................................................. 92
. On Board Diagnosis Logic ................................... 116 .
On Board Diagnosis Logic ..................................... 92 . Possible Cause .................................................... 116
.
Possible Cause ...................................................... 92. DTC Confirmation Procedure ............................... 116 .
DTC Confirmation Procedure ................................ 92 . Diagnostic Procedure ........................................... 116 .
Diagnostic Procedure ............................................ 92 . DTC P1710 A/T FLUID TEMPERATURE SENSOR
DTC P0740 TORQUE CONVERTER CLUTCH CIRCUIT ................................................................. 118
.
SOLENOID VALVE .................................................. 94 . Description ........................................................... 118
.
Description ............................................................. 94
. On Board Diagnosis Logic ................................... 118 .
On Board Diagnosis Logic ..................................... 94 . Possible Cause .................................................... 118
.
Possible Cause ...................................................... 94. DTC Confirmation Procedure ............................... 118 .
DTC Confirmation Procedure ................................ 94 . Wiring Diagram -- AT -- FTS .............................. 119 .
Wiring Diagram -- AT -- TCV ............................... 95 . Diagnostic Procedure ........................................... 120 .
Diagnostic Procedure ............................................ 96 . Component Inspection ......................................... 122 .
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)... 97 DTC P1716 TURBINE REVOLUTION SENSOR ... 123 .
Description ............................................................. 97
. Description ........................................................... 123
.
On Board Diagnosis Logic ..................................... 97 . On Board Diagnosis Logic ................................... 123 .
Possible Cause ...................................................... 97. Possible Cause .................................................... 123
.
DTC Confirmation Procedure ................................ 97 . DTC Confirmation Procedure ............................... 123 .
Wiring Diagram -- AT -- TCCSIG ......................... 98 . Wiring Diagram -- AT -- TRSA/T ........................ 124 .
Diagnostic Procedure ............................................ 99 . Diagnostic Procedure ........................................... 125 .
DTC P0745 LINE PRESSURE SOLENOID VALVE. 101 DTC P1721 VEHICLE SPEED SENSOR MTR ...... 127 .
Description ........................................................... 101
. Description ........................................................... 127
.
On Board Diagnosis Logic ................................... 101 . On Board Diagnosis Logic ................................... 127 .
Possible Cause .................................................... 101 . Possible Cause .................................................... 127
.
DTC Confirmation Procedure .............................. 101 . DTC Confirmation Procedure ............................... 127 .
Wiring Diagram -- AT -- LPSV ........................... 102 . Diagnostic Procedure ........................................... 127 .
Diagnostic Procedure .......................................... 103 . DTC P1730 A/T INTERLOCK ................................ 129 .
DTC P1701 TRANSMISSION CONTROL MODULE Description ........................................................... 129
.
(POWER SUPPLY) ................................................. 104 . On Board Diagnosis Logic ................................... 129 .
Description ........................................................... 104
. Possible Cause .................................................... 129
.
On Board Diagnosis Logic ................................... 104 . DTC Confirmation Procedure ............................... 129 .
Possible Cause .................................................... 104 . Wiring Diagram -- AT -- I/LOCK ......................... 130 .
DTC Confirmation Procedure .............................. 104 . Judgement of A/T Interlock .................................. 133 .
Wiring Diagram -- AT -- POWER ....................... 105 . Diagnostic Procedure ........................................... 133 .
Diagnostic Procedure .......................................... 108 . DTC P1731 A/T 1ST ENGINE BRAKING .............. 135 .
DTC P1702 TRANSMISSION CONTROL MODULE Description ........................................................... 135
.
(RAM) ..................................................................... 110
. On Board Diagnosis Logic ................................... 135 .
Description ........................................................... 110
. Possible Cause .................................................... 135
.
On Board Diagnosis Logic ................................... 110 . DTC Confirmation Procedure ............................... 135 .
Possible Cause .................................................... 110 . Wiring Diagram -- AT -- E/BRE .......................... 136 .
DTC Confirmation Procedure .............................. 110 . Diagnostic Procedure ........................................... 137 .
Diagnostic Procedure ...........................................111 . DTC P1752 INPUT CLUTCH SOLENOID VALVE . 138
DTC P1703 TRANSMISSION CONTROL MODULE Description ........................................................... 138
.
(ROM) ..................................................................... 112
. On Board Diagnosis Logic ................................... 138 .
Description ........................................................... 112
. Possible Cause .................................................... 138
.
On Board Diagnosis Logic ................................... 112 . DTC Confirmation Procedure ............................... 138 .
Possible Cause .................................................... 112 . Wiring Diagram -- AT -- I/C ................................ 139 .
Diagnostic Procedure ........................................... 140 .
Revision: 2004 April AT-2 2002 Q45
DTC P1754 INPUT CLUTCH SOLENOID VALVE DTC Confirmation Procedure .............................. 162 .
FUNCTION ............................................................. 141
. Wiring Diagram -- AT -- LC/B ............................ 163 . A
Description .......................................................... 141
. Diagnostic Procedure .......................................... 164 .
On Board Diagnosis Logic .................................. 141 . DTC P1774 LOW COAST BRAKE SOLENOID
Possible Cause ................................................... 141 . VALVE FUNCTION ................................................. 165 . B
DTC Confirmation Procedure .............................. 141 . Description ........................................................... 165
.
Wiring Diagram -- AT -- I/CF ............................. 142 . On Board Diagnosis Logic ................................... 165 .
Diagnostic Procedure .......................................... 143 . Possible Cause .................................................... 165 .
DTC P1757 FRONT BRAKE SOLENOID VALVE . 144 DTC Confirmation Procedure .............................. 165 . AT
Description .......................................................... 144
. Wiring Diagram -- AT -- LC/BF .......................... 166 .
On Board Diagnosis Logic .................................. 144 . Diagnostic Procedure .......................................... 167 .
Possible Cause ................................................... 144 . DTC P1815 MANUAL MODE SWITCH ................. 168 . D
DTC Confirmation Procedure .............................. 144 . Description ........................................................... 168
.
Wiring Diagram -- AT -- FR/B ............................ 145 . CONSULT-II Reference Value in Data Monitor Mode
Diagnostic Procedure .......................................... 146 . . 168 E
DTC P1759 FRONT BRAKE SOLENOID VALVE On Board Diagnosis Logic ................................... 168 .
FUNCTION ............................................................. 147
. Possible Cause .................................................... 168 .
Description .......................................................... 147
. DTC Confirmation Procedure .............................. 168 .
On Board Diagnosis Logic .................................. 147 . Wiring Diagram -- AT -- MMSW ........................ 169 . F
Possible Cause ................................................... 147 . Diagnostic Procedure .......................................... 170 .
DTC Confirmation Procedure .............................. 147 . Component Inspection ......................................... 170 .
Wiring Diagram -- AT -- FR/BF .......................... 148 . Position Indicator Lamp ....................................... 171 . G
Diagnostic Procedure .......................................... 149 . DTC P1841 ATF PRESSURE SWITCH 1 .............. 172 .
DTC P1762 DIRECT CLUTCH SOLENOID VALVE 150 . Description ........................................................... 172
.
Description .......................................................... 150
. On Board Diagnosis Logic ................................... 172 . H
On Board Diagnosis Logic .................................. 150 . Possible Cause .................................................... 172 .
Possible Cause ................................................... 150 . DTC Confirmation Procedure .............................. 172 .
DTC Confirmation Procedure .............................. 150 . Wiring Diagram -- AT -- FPSW1 ........................ 173 .
I
Wiring Diagram -- AT -- D/C .............................. 151 . Diagnostic Procedure .......................................... 174 .
Diagnostic Procedure .......................................... 152 . DTC P1843 ATF PRESSURE SWITCH 3 .............. 175 .
DTC P1764 DIRECT CLUTCH SOLENOID VALVE Description ........................................................... 175
.
FUNCTION ............................................................. 153
. On Board Diagnosis Logic ................................... 175 . J
Description .......................................................... 153
. Possible Cause .................................................... 175 .
On Board Diagnosis Logic .................................. 153 . DTC Confirmation Procedure .............................. 175 .
Possible Cause ................................................... 153 . Wiring Diagram -- AT -- FPSW3 ........................ 176 . K
DTC Confirmation Procedure .............................. 153 . Diagnostic Procedure .......................................... 177 .
Wiring Diagram -- AT -- D/CF ............................ 154 . DTC P1845 ATF PRESSURE SWITCH 5 .............. 178 .
Diagnostic Procedure .......................................... 155 . Description ........................................................... 178
. L
DTC P1767 HIGH AND LOW REVERSE CLUTCH On Board Diagnosis Logic ................................... 178 .
SOLENOID VALVE ................................................ 156 . Possible Cause .................................................... 178 .
Description .......................................................... 156
. DTC Confirmation Procedure .............................. 178 .
On Board Diagnosis Logic .................................. 156 . Wiring Diagram -- AT -- FPSW5 ........................ 179 . M
Possible Cause ................................................... 156 . Diagnostic Procedure .......................................... 180 .
DTC Confirmation Procedure .............................. 156 . DTC P1846 ATF PRESSURE SWITCH 6 .............. 181 .
Wiring Diagram -- AT -- HLR/C ......................... 157 . Description ........................................................... 181
.
Diagnostic Procedure .......................................... 158 . On Board Diagnosis Logic ................................... 181 .
DTC P1769 HIGH AND LOW REVERSE CLUTCH Possible Cause .................................................... 181 .
SOLENOID VALVE FUNCTION ............................ 159 . DTC Confirmation Procedure .............................. 181 .
Description .......................................................... 159
. Wiring Diagram -- AT -- FPSW6 ........................ 182 .
On Board Diagnosis Logic .................................. 159 . Diagnostic Procedure .......................................... 183 .
Possible Cause ................................................... 159 . PARK/NEUTRAL POSITION, MANUAL MODE,
DTC Confirmation Procedure .............................. 159 . BRAKE AND THROTTLE POSITION SWITCH CIR-
Wiring Diagram -- AT -- HLR/CF ....................... 160 . CUIT ....................................................................... 184
.
Diagnostic Procedure .......................................... 161 . Diagnostic Procedure .......................................... 184 .
DTC P1772 LOW COAST BRAKE SOLENOID TROUBLE DIAGNOSIS FOR SYMPTOMS ........... 186 .
VALVE .................................................................... 162
. Wiring Diagram -- AT -- NONDTC ..................... 186 .
Description .......................................................... 162
. A/T CHECK Indicator Lamp does not come on ... 187 .
On Board Diagnosis Logic .................................. 162 . Engine Cannot Be Started In "P" and "N" Position. 189
Possible Cause ................................................... 162 . In "P" Position, Vehicle Moves When Pushed ..... 189 .
Revision: 2004 April AT-3 2002 Q45
In "N" Position, Vehicle Moves ............................. 191 . A/T SHIFT LOCK SYSTEM .................................... 210 .
Large Shock "N" to "D" Position ........................... 191 . Description ........................................................... 210.
Vehicle Does Not Creep Backward In "R" Position. 192 Electrical Parts Location ...................................... 210 .
Vehicle Does Not Creep Forward In "D" Position . 194 Wiring Diagram -- AT -- SHIFT .......................... 211 .
Vehicle Cannot Be Started From D1 .................... 195 . Shift Lock Control Unit Reference Values ............ 212 .
A/T Does Not Shift: D1 D2 Or Does Not Kick down: Component Inspection ......................................... 213 .
D4 D2 ............................................................... 196
. AIR BREATHER HOSE .......................................... 215 .
A/T Does Not Shift: D2 D3 ............................... 197 . Removal and Installation ...................................... 215 .
A/T Does Not Shift: D3 D4 ............................... 198 . TRANSMISSION ASSEMBLY ................................ 216 .
A/T Does Not Shift: D4 D5 ............................... 199 . Removal and Installation ...................................... 216 .
A/T Does Not Perform Lock-up ........................... 200 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 219 .
A/T Does Not Hold Lock-up Condition ................. 201 . General Specifications ......................................... 219 .
Lock-up Is Not Released ..................................... 201 . Vehicle Speed When Shifting Gears Throttle Posi-
Engine Speed Does Not Return To Idle ............... 202 . tion ....................................................................... 219
.
A/T Does Not Shift: D5 D4 ............................... 203 . Vehicle Speed When Performing and Releasing
A/T Does Not Shift: D4 D3 ............................... 204 . Complete Lock-up ................................................ 219 .
A/T Does Not Shift: D3 D2 ............................... 205 . Vehicle Speed When Performing and Releasing
A/T Does Not Shift: D2 D1 ............................... 205 . Slip Lock-up ......................................................... 219 .
Vehicle Does Not Decelerate By Engine Brake ... 206 . Stall Revolution .................................................... 219 .
SHIFT CONTROL SYSTEM ................................... 207 . Line Pressure ....................................................... 220 .
Control Device ..................................................... 207
. Solenoid Valves ................................................... 220 .
Control Cable ....................................................... 208
. A/T Fluid Temperature Sensor ............................. 220 .
PARK/NEUTRAL POSITION (PNP) SWITCH ....... 209 . Turbine Revolution Sensor ................................... 220 .
Checking of A/T Positions ................................... 209 . Revolution Sensor ................................................ 220 .
Adjustment of A/T Positions ................................ 209 . Tightening Torque ................................................ 220 .
Revision: 2004 April AT-4 2002 Q45
INDEX FOR DTC
INDEX FOR DTC PFP:00024
A
Alphabetical Index ECS0021I
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to B
AT-79 .
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-135 D
ATF PRES SW 1/CIRC -- P1841 AT-172
ATF PRES SW 3/CIRC -- P1843 AT-175
E
ATF PRES SW 5/CIRC -- P1845 AT-178
ATF PRES SW 6/CIRC -- P1846 AT-181
A/T INTERLOCK P1730 P1730 AT-129 F
A/T TCC S/V FNCTN P0744 P0744 AT-97
ATF TEMP SEN/CIRC P1710 P1710 AT-118
G
CAN COMM CIRCUIT U1000 U1000 AT-79
D/C SOLENOID/CIRC P1762 P1762 AT-150
D/C SOLENOID FNCTN P1764 P1764 AT-153 H
ENGINE SPEED SIG -- P0725 AT-92
FR/B SOLENOID/CIRC P1757 P1757 AT-144
I
FR/B SOLENOID FNCT P1759 P1759 AT-147
HLR/C SOL/CIRC P1767 P1767 AT-156
HLR/C SOL FNCTN P1769 P1769 AT-159 J
I/C SOLENOID/CIRC P1752 P1752 AT-138
I/C SOLENOID FNCTN P1754 P1754 AT-141
L/PRESS SOL/CIRC P0745 P0745 AT-101 K
LC/B SOLENOID/CIRC P1772 P1772 AT-162
LC/B SOLENOID FNCT P1774 P1774 AT-165
L
MANU MODE SW/CIR -- P1815 AT-168
PNP SW/CIRC P0705 P0705 AT-85
STARTER RELAY/CIRC -- P0615 AT-82 M
TCC SOLENOID/CIRC P0740 P0740 AT-94
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