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AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
A
AUTOMATIC TRANSMISSION
SECTION AT B
AT
D
E
CONTENTS
INDEX FOR DTC ....................................................... 5. Fail-Safe ................................................................ 41
. F
Alphabetical Index ................................................... 5
. How To Perform Trouble Diagnosis For Quick and
DTC No. Index ........................................................ 6
. Accurate Repair ..................................................... 43
.
PRECAUTIONS ......................................................... 7. A/T Electrical Parts Location ................................. 48 . G
Precautions for Supplemental Restraint System Circuit Diagram ...................................................... 49
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Inspections Before Trouble Diagnosis ................... 50 .
SIONER" ................................................................. 7
. Check Before Engine is Started ............................. 54 .
H
Precautions for Battery Service ............................... 7 . Check at Idle .......................................................... 54
.
Precautions for On Board Diagnostic (OBD) System Cruise Test - Part 1 ................................................ 55
.
of A/T and Engine ................................................... 7
. Cruise Test - Part 2 ................................................ 57
.
Precautions for TCM, A/T Assembly and Control Cruise Test - Part 3 ................................................ 58
. I
Valve Assembly Replacement ................................. 8 . Vehicle Speed When Shifting Gears ..................... 59 .
Precautions ............................................................. 9
. Vehicle Speed When Performing and Releasing
Service Notice or Precautions ............................... 10 . Complete Lock-Up ................................................. 59 . J
Wiring Diagrams and Trouble Diagnosis ............... 10 . Vehicle Speed When Performing and Releasing
PREPARATION .........................................................11. Slip Lock-Up .......................................................... 59
.
Special Service Tools .............................................11. Symptom Chart ...................................................... 60.
K
Commercial Service Tools ..................................... 12 . TCM Input/Output Signal Reference Values .......... 83 .
A/T FLUID ................................................................ 13
. CONSULT-II ........................................................... 86
.
Changing A/T Fluid ............................................... 13. Diagnostic Procedure Without CONSULT-II .......... 96 .
Checking A/T Fluid ................................................ 13
. DTC U1000 CAN COMMUNICATION LINE ............. 98 . L
A/T CONTROL SYSTEM ......................................... 15 . Description ............................................................. 98
.
Cross-Sectional View ............................................ 15 . On Board Diagnosis Logic ..................................... 98 .
Shift Mechanism .................................................... 16
. Possible Cause ...................................................... 98
. M
TCM Function ........................................................ 27
. DTC Confirmation Procedure ................................ 98 .
CAN Communication ............................................. 28 . Wiring Diagram -- AT -- CAN ............................... 99 .
Input/Output Signal of TCM ................................... 30 . Diagnostic Procedure .......................................... 100 .
Line Pressure Control ........................................... 31 . DTC P0615 START SIGNAL CIRCUIT .................. 101 .
Shift Control .......................................................... 32
. Description ........................................................... 101
.
Lock-Up Control .................................................... 33
. On Board Diagnosis Logic ................................... 101 .
Engine Brake Control ............................................ 35 . Possible Cause .................................................... 101.
Control Valve ......................................................... 35
. DTC Confirmation Procedure .............................. 101 .
ON BOARD DIAGNOSTIC (OBD) SYSTEM ........... 37 . Wiring Diagram -- AT -- STSIG ......................... 102 .
Introduction ........................................................... 37
. Diagnostic Procedure .......................................... 103 .
OBD-II Function for A/T System ............................ 37 . DTC P0705 PARK/NEUTRAL POSITION SWITCH. 105
One or Two Trip Detection Logic of OBD-II ........... 37 . Description ........................................................... 105
.
OBD-II Diagnostic Trouble Code (DTC) ................ 37 . On Board Diagnosis Logic ................................... 105 .
Malfunction Indicator Lamp (MIL) .......................... 40 . Possible Cause .................................................... 105.
TROUBLE DIAGNOSIS ........................................... 41 . DTC Confirmation Procedure .............................. 105 .
DTC Inspection Priority Chart ............................... 41 . Wiring Diagram -- AT -- PNP/SW ...................... 106 .
Revision; 2004 April AT-1 2003 G35 Coupe
Diagnostic Procedure .......................................... 107 . (ROM) ..................................................................... 140
.
Component Inspection ......................................... 109 . Description ........................................................... 140
.
DTC P0720 VEHICLE SPEED SENSOR A/T (REV- On Board Diagnosis Logic ................................... 140 .
OLUTION SENSOR) .............................................. 110 . Possible Cause .................................................... 140 .
Description ........................................................... 110
. DTC Confirmation Procedure ............................... 140 .
On Board Diagnosis Logic ................................... 110 . Diagnostic Procedure ........................................... 141 .
Possible Cause .................................................... 110 . DTC P1704 TRANSMISSION CONTROL MODULE
DTC Confirmation Procedure .............................. 110 . (EEPROM) .............................................................. 142
.
Wiring Diagram -- AT -- VSSA/T .........................111 . Description ........................................................... 142
.
Diagnostic Procedure .......................................... 112 . On Board Diagnosis Logic ................................... 142 .
DTC P0725 ENGINE SPEED SIGNAL .................. 115 . Possible Cause .................................................... 142 .
Description ........................................................... 115
. DTC Confirmation Procedure ............................... 142 .
On Board Diagnosis Logic ................................... 115 . Diagnostic Procedure ........................................... 143 .
Possible Cause .................................................... 115 . DTC P1705 THROTTLE POSITION SENSOR ....... 144 .
DTC Confirmation Procedure .............................. 115 . Description ........................................................... 144
.
Diagnostic Procedure .......................................... 115 . On Board Diagnosis Logic ................................... 144 .
DTC P0740 TORQUE CONVERTER CLUTCH Possible Cause .................................................... 144 .
SOLENOID VALVE ................................................ 117 . DTC Confirmation Procedure ............................... 144 .
Description ........................................................... 117
. Diagnostic Procedure ........................................... 144 .
CONSULT-II Reference Value ............................. 117 . DTC P1710 A/T FLUID TEMPERATURE SENSOR
On Board Diagnosis Logic ................................... 117 . CIRCUIT ................................................................. 146
.
Possible Cause .................................................... 117 . Description ........................................................... 146
.
DTC Confirmation Procedure .............................. 117 . CONSULT-II Reference Value .............................. 146 .
Wiring Diagram -- AT -- TCV ............................. 118 . On Board Diagnosis Logic ................................... 146 .
Diagnostic Procedure .......................................... 119 . Possible Cause .................................................... 146 .
Component Inspection ......................................... 121 . DTC Confirmation Procedure ............................... 146 .
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP). 122 Wiring Diagram -- AT -- FTS .............................. 147 .
Description ........................................................... 122
. Diagnostic Procedure ........................................... 148 .
On Board Diagnosis Logic ................................... 122 . Component Inspection ......................................... 151 .
Possible Cause .................................................... 122 . DTC P1716 TURBINE REVOLUTION SENSOR ... 152 .
DTC Confirmation Procedure .............................. 122 . Description ........................................................... 152
.
Wiring Diagram -- AT -- TCCSIG ....................... 123 . On Board Diagnosis Logic ................................... 152 .
Diagnostic Procedure .......................................... 124 . Possible Cause .................................................... 152 .
Component Inspection ......................................... 126 . DTC Confirmation Procedure ............................... 152 .
DTC P0745 LINE PRESSURE SOLENOID VALVE. 127 Wiring Diagram -- AT -- TRSA/T ........................ 153 .
Description ........................................................... 127
. Diagnostic Procedure ........................................... 154 .
On Board Diagnosis Logic ................................... 127 . DTC P1721 VEHICLE SPEED SENSOR MTR ...... 157 .
Possible Cause .................................................... 127 . Description ........................................................... 157
.
DTC Confirmation Procedure .............................. 127 . On Board Diagnosis Logic ................................... 157 .
Wiring Diagram -- AT -- LPSV ........................... 128 . Possible Cause .................................................... 157 .
Diagnostic Procedure .......................................... 129 . DTC Confirmation Procedure ............................... 157 .
Component Inspection ......................................... 131 . Diagnostic Procedure ........................................... 157 .
DTC P1701 TRANSMISSION CONTROL MODULE DTC P1730 A/T INTERLOCK ................................ 159 .
(POWER SUPPLY) ................................................. 132 . Description ........................................................... 159
.
Description ........................................................... 132
. On Board Diagnosis Logic ................................... 159 .
On Board Diagnosis Logic ................................... 132 . Possible Cause .................................................... 159 .
Possible Cause .................................................... 132 . DTC Confirmation Procedure ............................... 159 .
DTC Confirmation Procedure .............................. 132 . Wiring Diagram -- AT -- I/LOCK ......................... 160 .
Wiring Diagram -- AT -- POWER ....................... 133 . Judgement of A/T Interlock .................................. 164 .
Diagnostic Procedure .......................................... 135 . Diagnostic Procedure ........................................... 164 .
Component Inspection ......................................... 137 . DTC P1731 A/T 1ST ENGINE BRAKING .............. 166 .
DTC P1702 TRANSMISSION CONTROL MODULE Description ........................................................... 166
.
(RAM) ..................................................................... 138
. On Board Diagnosis Logic ................................... 166 .
Description ........................................................... 138
. Possible Cause .................................................... 166 .
On Board Diagnosis Logic ................................... 138 . DTC Confirmation Procedure ............................... 166 .
Possible Cause .................................................... 138 . Wiring Diagram -- AT -- E/BRE .......................... 167 .
DTC Confirmation Procedure .............................. 138 . Diagnostic Procedure ........................................... 168 .
Diagnostic Procedure .......................................... 139 . DTC P1752 INPUT CLUTCH SOLENOID VALVE . 170
DTC P1703 TRANSMISSION CONTROL MODULE Description ........................................................... 170
.
Revision; 2004 April AT-2 2003 G35 Coupe
On Board Diagnosis Logic .................................. 170 . Possible Cause .................................................... 203 .
Possible Cause ................................................... 170
. DTC Confirmation Procedure .............................. 203 . A
DTC Confirmation Procedure .............................. 170 . Wiring Diagram -- AT -- HLR/CF ....................... 204 .
Wiring Diagram -- AT -- I/C ............................... 171 . Diagnostic Procedure .......................................... 205 .
Diagnostic Procedure .......................................... 172 . DTC P1772 LOW COAST BRAKE SOLENOID B
Component Inspection ........................................ 174 . VALVE .................................................................... 208
.
DTC P1754 INPUT CLUTCH SOLENOID VALVE Description ........................................................... 208
.
FUNCTION ............................................................. 175
. On Board Diagnosis Logic ................................... 208 .
Description .......................................................... 175
. Possible Cause .................................................... 208 . AT
On Board Diagnosis Logic .................................. 175 . DTC Confirmation Procedure .............................. 208 .
Possible Cause ................................................... 175
. Wiring Diagram -- AT -- LC/B ............................ 209 .
DTC Confirmation Procedure .............................. 175 . Diagnostic Procedure .......................................... 210 . D
Wiring Diagram -- AT -- I/CF ............................. 176 . Component Inspection ......................................... 212 .
Diagnostic Procedure .......................................... 177 . DTC P1774 LOW COAST BRAKE SOLENOID
DTC P1757 FRONT BRAKE SOLENOID VALVE . 179 VALVE FUNCTION ................................................. 213 . E
Description .......................................................... 179
. Description ........................................................... 213
.
On Board Diagnosis Logic .................................. 179 . On Board Diagnosis Logic ................................... 213 .
Possible Cause ................................................... 179
. Possible Cause .................................................... 213 .
DTC Confirmation Procedure .............................. 179 . DTC Confirmation Procedure .............................. 213 . F
Wiring Diagram -- AT -- FR/B ............................ 180 . Wiring Diagram -- AT -- LC/BF .......................... 214 .
Diagnostic Procedure .......................................... 181 . Diagnostic Procedure .......................................... 215 .
Component Inspection ........................................ 183 . DTC P1815 MANUAL MODE SWITCH ................. 217 . G
DTC P1759 FRONT BRAKE SOLENOID VALVE Description ........................................................... 217
.
FUNCTION ............................................................. 184
. CONSULT-II Reference Value in Data Monitor Mode
Description .......................................................... 184
. . 217 H
On Board Diagnosis Logic .................................. 184 . On Board Diagnosis Logic ................................... 217 .
Possible Cause ................................................... 184
. Possible Cause .................................................... 217 .
DTC Confirmation Procedure .............................. 184 . DTC Confirmation Procedure .............................. 217 .
I
Wiring Diagram -- AT -- FR/BF .......................... 185 . Wiring Diagram -- AT -- MMSW ........................ 218 .
Diagnostic Procedure .......................................... 186 . Diagnostic Procedure .......................................... 219 .
DTC P1762 DIRECT CLUTCH SOLENOID VALVE 189 . Component Inspection ......................................... 220 .
Description .......................................................... 189
. Position Indicator Lamp ....................................... 220 . J
On Board Diagnosis Logic .................................. 189 . DTC P1841 ATF PRESSURE SWITCH 1 .............. 221 .
Possible Cause ................................................... 189
. Description ........................................................... 221
.
DTC Confirmation Procedure .............................. 189 . On Board Diagnosis Logic ................................... 221 . K
Wiring Diagram -- AT -- D/C .............................. 190 . Possible Cause .................................................... 221 .
Diagnostic Procedure .......................................... 191 . DTC Confirmation Procedure .............................. 221 .
Component Inspection ........................................ 193 . Wiring Diagram -- AT -- FPSW1 ........................ 222 . L
DTC P1764 DIRECT CLUTCH SOLENOID VALVE Diagnostic Procedure .......................................... 223 .
FUNCTION ............................................................. 194
. DTC P1843 ATF PRESSURE SWITCH 3 .............. 225 .
Description .......................................................... 194
. Description ........................................................... 225
.
On Board Diagnosis Logic .................................. 194 . On Board Diagnosis Logic ................................... 225 . M
Possible Cause ................................................... 194
. Possible Cause .................................................... 225 .
DTC Confirmation Procedure .............................. 194 . DTC Confirmation Procedure .............................. 225 .
Wiring Diagram -- AT -- D/CF ............................ 195 . Wiring Diagram -- AT -- FPSW3 ........................ 226 .
Diagnostic Procedure .......................................... 196 . Diagnostic Procedure .......................................... 227 .
DTC P1767 HIGH AND LOW REVERSE CLUTCH DTC P1845 ATF PRESSURE SWITCH 5 .............. 229 .
SOLENOID VALVE ................................................ 198 . Description ........................................................... 229
.
Description .......................................................... 198
. On Board Diagnosis Logic ................................... 229 .
On Board Diagnosis Logic .................................. 198 . Possible Cause .................................................... 229 .
Possible Cause ................................................... 198
. DTC Confirmation Procedure .............................. 229 .
DTC Confirmation Procedure .............................. 198 . Wiring Diagram -- AT -- FPSW5 ........................ 230 .
Wiring Diagram -- AT -- HLR/C ......................... 199 . Diagnostic Procedure .......................................... 231 .
Diagnostic Procedure .......................................... 200 . DTC P1846 ATF PRESSURE SWITCH 6 .............. 233 .
Component Inspection ........................................ 202 . Description ........................................................... 233
.
DTC P1769 HIGH AND LOW REVERSE CLUTCH On Board Diagnosis Logic ................................... 233 .
SOLENOID VALVE FUNCTION ............................ 203 . Possible Cause .................................................... 233 .
Description .......................................................... 203
. DTC Confirmation Procedure .............................. 233 .
On Board Diagnosis Logic .................................. 203 .
Revision; 2004 April AT-3 2003 G35 Coupe
Wiring Diagram -- AT -- FPSW6 ........................ 234 . ON-VEHICLE SERVICE ......................................... 294 .
Diagnostic Procedure .......................................... 235 . Control Valve Assembly ....................................... 294 .
PARK/NEUTRAL POSITION, MANUAL MODE, Rear Oil Seal ........................................................ 300
.
BRAKE AND THROTTLE POSITION SWITCH CIR- Parking Components ........................................... 301 .
CUIT ....................................................................... 237
. AIR BREATHER HOSE .......................................... 307 .
Diagnostic Procedure .......................................... 237 . Removal and Installation ...................................... 307 .
TROUBLE DIAGNOSIS FOR SYMPTOMS ........... 239 . TRANSMISSION ASSEMBLY ................................ 308 .
Wiring Diagram -- AT -- NONDTC ..................... 239 . Removal and Installation ...................................... 308 .
A/T CHECK Indicator Lamp Does Not Come On . 241 OVERHAUL ............................................................ 311
.
Engine Cannot Be Started In "P" or "N" Position . 243 Components ......................................................... 311
.
In "P" Position, Vehicle Moves When Pushed ..... 243 . Oil Channel .......................................................... 317
.
In "N" Position, Vehicle Moves ............................. 245 . Locations of Adjusting Shims, Needle Bearings,
Large Shock ("N" to "D" Position) ........................ 246 . Thrust Washers and Snap Rings ......................... 318 .
Vehicle Does Not Creep Backward In "R" Position. 249 DISASSEMBLY ...................................................... 319 .
Vehicle Does Not Creep Forward In "D" Position . 251 Disassembly ......................................................... 319
.
Vehicle Cannot Be Started From D1 .................... 255 . REPAIR FOR COMPONENT PARTS ..................... 334 .
A/T Does Not Shift: D1 D2 ............................... 257 . Oil Pump .............................................................. 334
.
A/T Does Not Shift: D2 D3 ............................... 259 . Front Sun Gear, 3rd One-Way Clutch .................. 336 .
A/T Does Not Shift: D3 D4 ............................... 262 . Front Carrier, Input Clutch, Rear Internal Gear .... 339 .
A/T Does Not Shift: D4 D5 ............................... 264 . Mid Sun Gear, Rear Sun Gear, High and Low
A/T Does Not Perform Lock-Up ........................... 266 . Reverse Clutch Hub ............................................. 344 .
A/T Does Not Hold Lock-Up Condition ................ 269 . High and Low Reverse Clutch ............................. 349 .
Lock-Up Is Not Released ..................................... 270 . Direct Clutch ........................................................ 350
.
Engine Speed Does Not Return To Idle ............... 271 . ASSEMBLY ............................................................ 352
.
Cannot Be Changed to Manual Mode ................. 272 . Assembly (1) ........................................................ 352
.
A/T Does Not Shift: 5th Gear 4th Gear ........... 273 . Adjustment ........................................................... 363
.
A/T Does Not Shift: 4th Gear 3rd Gear ........... 275 . Assembly (2) ........................................................ 365
.
A/T Does Not Shift: 3rd Gear 2nd Gear .......... 277 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 371 .
A/T Does Not Shift: 2nd Gear 1st Gear ........... 279 . General Specifications ......................................... 371 .
Vehicle Does Not Decelerate By Engine Brake ... 281 . Vehicle Speed When Shifting Gears .................... 371 .
SHIFT CONTROL SYSTEM ................................... 283 . Vehicle Speed When Performing and Releasing
Control Device Removal and Installation ............. 283 . Complete Lock-Up ............................................... 371 .
Adjustment of A/T Position .................................. 284 . Vehicle Speed When Performing and Releasing
Checking of A/T Position ..................................... 284 . Slip Lock-Up ......................................................... 371
.
A/T SHIFT LOCK SYSTEM .................................... 286 . Stall Speed ........................................................... 371
.
Description ........................................................... 286
. Line Pressure ....................................................... 372
.
Shift Lock System Electrical Parts Location ........ 286 . Solenoid Valves ................................................... 372
.
Wiring Diagram -- AT -- SHIFT .......................... 287 . A/T Fluid Temperature Sensor ............................. 372 .
Diagnostic Procedure .......................................... 288 . Turbine Revolution Sensor ................................... 372 .
KEY INTERLOCK CABLE ..................................... 291 . Vehicle Speed Sensor A/T (Revolution Sensor) .. 372 .
Components ........................................................ 291 . Reverse Brake ..................................................... 373
.
Removal .............................................................. 292. Total End Play ...................................................... 373
.
Installation ............................................................ 293
.
Revision; 2004 April AT-4 2003 G35 Coupe
INDEX FOR DTC
INDEX FOR DTC PFP:00024
A
Alphabetical Index ACS002AD
NOTE:
If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to B
AT-98 .
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-166 D
ATF PRES SW 1/CIRC -- P1841 AT-221
ATF PRES SW 3/CIRC -- P1843 AT-225
E
ATF PRES SW 5/CIRC -- P1845 AT-229
ATF PRES SW 6/CIRC -- P1846 AT-233
A/T INTERLOCK P1730 P1730 AT-159 F
A/T TCC S/V FNCTN P0744 P0744 AT-122
ATF TEMP SEN/CIRC P0710 P1710 AT-146
G
CAN COMM CIRCUIT U1000 U1000 AT-98
D/C SOLENOID/CIRC P1762 P1762 AT-189
D/C SOLENOID FNCTN P1764 P1764 AT-194 H
ENGINE SPEED SIG P0725 P0725 AT-115
FR/B SOLENOID/CIRC P1757 P1757 AT-179
I
FR/B SOLENOID FNCT P1759 P1759 AT-184
HLR/C SOL/CIRC P1767 P1767 AT-198
HLR/C SOL FNCTN P1769 P1769 AT-203 J
I/C SOLENOID/CIRC P1752 P1752 AT-170
I/C SOLENOID FNCTN P1754 P1754 AT-175
L/PRESS SOL/CIRC P0745 P0745 AT-127 K
LC/B SOLENOID/CIRC P1772 P1772 AT-208
LC/B SOLENOID FNCT P1774 P1774 AT-213
L
MANU MODE SW/CIR -- P1815 AT-217
PNP SW/CIRC P0705 P0705 AT-105
STARTER RELAY/CIRC -- P0615 AT-101 M
TCC SOLENOID/CIRC P0740 P0740 AT-117
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