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AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
A
AUTOMATIC TRANSMISSION
SECTION AT B
AT
D
E
CONTENTS
INDEX FOR DTC ....................................................... 5 . How To Perform Trouble Diagnosis For Quick and F
Alphabetical Index ................................................... 5
. Accurate Repair ..................................................... 44
.
DTC No. Index ........................................................ 6
. A/T Electrical Parts Location ................................. 49 .
PRECAUTIONS ......................................................... 7 . Circuit Diagram ...................................................... 50
. G
Precautions for Supplemental Restraint System Inspections Before Trouble Diagnosis ................... 51 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Check Before Engine Is Started ............................ 56 .
SIONER" ................................................................. 7
. Check at Idle .......................................................... 56
.
H
Precautions for On Board Diagnostic (OBD) System Cruise Test - Part 1 ................................................ 60
.
of A/T and Engine ................................................... 7. Cruise Test - Part 2 ................................................ 63
.
Precautions ............................................................. 8
. Cruise Test - Part 3 ................................................ 64
.
Service Notice or Precautions ................................. 9 . Vehicle Speed at Which Gear Shifting Occurs ...... 65 . I
Wiring Diagrams and Trouble Diagnosis ................. 9 . Vehicle Speed at Which Lock-up Occurs/Releases 65 ...
PREPARATION ........................................................ 10 . Symptom Chart ...................................................... 66
.
Special Service Tools ............................................ 10 . TCM Input/Output Signal Reference Values .......... 91 . J
Commercial Service Tools ......................................11 . CONSULT-II Function (A/T) ................................... 92 .
A/T FLUID ................................................................ 12
. Diagnostic Procedure Without CONSULT-II ........ 106 .
Changing A/T Fluid ............................................... 12 . DTC U1000 CAN COMMUNICATION LINE ............111 .
K
Checking A/T Fluid ................................................ 12 . Description ............................................................111
.
A/T Fluid Cooler Cleaning ..................................... 14 . On Board Diagnosis Logic ....................................111 .
A/T CONTROL SYSTEM ......................................... 17 . Possible Cause .....................................................111
.
Cross-Sectional View (2WD Models) .................... 17 . DTC Confirmation Procedure ...............................111 . L
Cross-Sectional View (AWD Models) .................... 18 . Wiring Diagram -- AT -- CAN ............................. 112 .
Shift Mechanism .................................................... 19. Diagnostic Procedure .......................................... 113 .
TCM Function ........................................................ 30
. DTC P0615 START SIGNAL CIRCUIT .................. 114 . M
CAN Communication ............................................. 31 . Description ........................................................... 114
.
Input/Output Signal of TCM ................................... 31 . CONSULT-II Reference Value ............................. 114 .
Line Pressure Control ........................................... 32 . On Board Diagnosis Logic ................................... 114 .
Shift Control .......................................................... 33
. Possible Cause .................................................... 114
.
Lock-up Control ..................................................... 35
. DTC Confirmation Procedure .............................. 114 .
Engine Brake Control ............................................ 36 . Wiring Diagram -- AT -- STSIG ......................... 115 .
Control Valve ......................................................... 37
. Diagnostic Procedure .......................................... 116 .
ON BOARD DIAGNOSTIC (OBD) SYSTEM ........... 38 . DTC P0700 TCM .................................................... 118 .
Introduction ........................................................... 38
. Description ........................................................... 118
.
OBD-II Function for A/T System ............................ 38 . On Board Diagnosis Logic ................................... 118 .
One or Two Trip Detection Logic of OBD-II ........... 38 . Possible Cause .................................................... 118
.
OBD-II Diagnostic Trouble Code (DTC) ................ 38 . DTC Confirmation Procedure .............................. 118 .
Malfunction Indicator Lamp (MIL) .......................... 41 . Diagnostic Procedure .......................................... 118 .
TROUBLE DIAGNOSIS ........................................... 42 . DTC P0705 PARK/NEUTRAL POSITION SWITCH. 119
DTC Inspection Priority Chart ............................... 42 . Description ........................................................... 119
.
Fail-Safe ................................................................ 42
. CONSULT-II Reference Value ............................. 119 .
Edition; 2004 September AT-1 2005 G35 Sedan
On Board Diagnosis Logic ................................... 119 . CONSULT-II Reference Value .............................. 138 .
Possible Cause .................................................... 119 . On Board Diagnosis Logic ................................... 138 .
DTC Confirmation Procedure .............................. 119 . Possible Cause .................................................... 138.
Wiring Diagram -- AT -- PNP/SW ...................... 120 . DTC Confirmation Procedure ............................... 138 .
Diagnostic Procedure .......................................... 121 . Diagnostic Procedure ........................................... 139 .
DTC P0720 VEHICLE SPEED SENSOR A/T (REV- DTC P1710 A/T FLUID TEMPERATURE SENSOR
OLUTION SENSOR) .............................................. 123 . CIRCUIT ................................................................. 141
.
Description ........................................................... 123
. Description ........................................................... 141
.
CONSULT-II Reference Value ............................. 123 . CONSULT-II Reference Value .............................. 141 .
On Board Diagnosis Logic ................................... 123 . On Board Diagnosis Logic ................................... 141 .
Possible Cause .................................................... 123 . Possible Cause .................................................... 141.
DTC Confirmation Procedure .............................. 123 . DTC Confirmation Procedure ............................... 141 .
Wiring Diagram -- AT -- VSSA/T ........................ 125 . Wiring Diagram -- AT -- FTS .............................. 142 .
Diagnostic Procedure .......................................... 126 . Diagnostic Procedure ........................................... 143 .
DTC P0725 ENGINE SPEED SIGNAL .................. 128 . Component Inspection ......................................... 145 .
Description ........................................................... 128
. DTC P1716 TURBINE REVOLUTION SENSOR ... 146 .
CONSULT-II Reference Value ............................. 128 . Description ........................................................... 146
.
On Board Diagnosis Logic ................................... 128 . CONSULT-II Reference Value .............................. 146 .
Possible Cause .................................................... 128 . On Board Diagnosis Logic ................................... 146 .
DTC Confirmation Procedure .............................. 128 . Possible Cause .................................................... 146.
Diagnostic Procedure .......................................... 129 . DTC Confirmation Procedure ............................... 146 .
DTC P0740 TORQUE CONVERTER CLUTCH Diagnostic Procedure ........................................... 147 .
SOLENOID VALVE ................................................ 130 . DTC P1721 VEHICLE SPEED SENSOR MTR ...... 148 .
Description ........................................................... 130
. Description ........................................................... 148
.
CONSULT-II Reference Value ............................. 130 . CONSULT-II Reference Value .............................. 148 .
On Board Diagnosis Logic ................................... 130 . On Board Diagnosis Logic ................................... 148 .
Possible Cause .................................................... 130 . Possible Cause .................................................... 148.
DTC Confirmation Procedure .............................. 130 . DTC Confirmation Procedure ............................... 148 .
Diagnostic Procedure .......................................... 131 . Diagnostic Procedure ........................................... 149 .
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP). 132 DTC P1730 A/T INTERLOCK ................................ 150 .
Description ........................................................... 132
. Description ........................................................... 150
.
CONSULT-II Reference Value ............................. 132 . On Board Diagnosis Logic ................................... 150 .
On Board Diagnosis Logic ................................... 132 . Possible Cause .................................................... 150.
Possible Cause .................................................... 132 . DTC Confirmation Procedure ............................... 150 .
DTC Confirmation Procedure .............................. 132 . Judgement of A/T Interlock .................................. 151 .
Diagnostic Procedure .......................................... 133 . Diagnostic Procedure ........................................... 151 .
DTC P0745 LINE PRESSURE SOLENOID VALVE. 134 DTC P1731 A/T 1ST ENGINE BRAKING .............. 153 .
Description ........................................................... 134
. Description ........................................................... 153
.
CONSULT-II Reference Value ............................. 134 . CONSULT-II Reference Value .............................. 153 .
On Board Diagnosis Logic ................................... 134 . On Board Diagnosis Logic ................................... 153 .
Possible Cause .................................................... 134 . Possible Cause .................................................... 153.
DTC Confirmation Procedure .............................. 134 . DTC Confirmation Procedure ............................... 153 .
Diagnostic Procedure .......................................... 135 . Diagnostic Procedure ........................................... 154 .
DTC P1702 TRANSMISSION CONTROL MODULE DTC P1752 INPUT CLUTCH SOLENOID VALVE . 155
(RAM) ..................................................................... 136
. Description ........................................................... 155
.
Description ........................................................... 136
. CONSULT-II Reference Value .............................. 155 .
On Board Diagnosis Logic ................................... 136 . On Board Diagnosis Logic ................................... 155 .
Possible Cause .................................................... 136 . Possible Cause .................................................... 155.
DTC Confirmation Procedure .............................. 136 . DTC Confirmation Procedure ............................... 155 .
Diagnostic Procedure .......................................... 136 . Diagnostic Procedure ........................................... 156 .
DTC P1703 TRANSMISSION CONTROL MODULE DTC P1754 INPUT CLUTCH SOLENOID VALVE
(ROM) ..................................................................... 137
. FUNCTION ............................................................. 157
.
Description ........................................................... 137
. Description ........................................................... 157
.
On Board Diagnosis Logic ................................... 137 . CONSULT-II Reference Value .............................. 157 .
Possible Cause .................................................... 137 . On Board Diagnosis Logic ................................... 157 .
DTC Confirmation Procedure .............................. 137 . Possible Cause .................................................... 157.
Diagnostic Procedure .......................................... 137 . DTC Confirmation Procedure ............................... 157 .
DTC P1705 THROTTLE POSITION SENSOR ...... 138 . Diagnostic Procedure ........................................... 158 .
Description ........................................................... 138
. DTC P1757 FRONT BRAKE SOLENOID VALVE .. 159 .
Edition; 2004 September AT-2 2005 G35 Sedan
Description .......................................................... 159
. DTC Confirmation Procedure .............................. 173 .
CONSULT-II Reference Value ............................. 159 . Diagnostic Procedure .......................................... 174 . A
On Board Diagnosis Logic .................................. 159 . DTC P1815 MANUAL MODE SWITCH ................. 175 .
Possible Cause ................................................... 159 . Description ........................................................... 175
.
DTC Confirmation Procedure .............................. 159 . CONSULT-II Reference Value ............................. 175 . B
Diagnostic Procedure .......................................... 160 . On Board Diagnosis Logic ................................... 175 .
DTC P1759 FRONT BRAKE SOLENOID VALVE Possible Cause .................................................... 175
.
FUNCTION ............................................................. 161
. DTC Confirmation Procedure .............................. 175 .
Description .......................................................... 161
. Wiring Diagram -- AT -- MMSW ........................ 176 . AT
CONSULT-II Reference Value ............................. 161 . Diagnostic Procedure .......................................... 177 .
On Board Diagnosis Logic .................................. 161 . Component Inspection ......................................... 178 .
Possible Cause ................................................... 161 . DTC P1841 ATF PRESSURE SWITCH 1 .............. 179 . D
DTC Confirmation Procedure .............................. 161 . Description ........................................................... 179
.
Diagnostic Procedure .......................................... 162 . CONSULT-II Reference Value ............................. 179 .
DTC P1762 DIRECT CLUTCH SOLENOID VALVE 163 . On Board Diagnosis Logic ................................... 179 . E
Description .......................................................... 163
. Possible Cause .................................................... 179
.
CONSULT-II Reference Value ............................. 163 . DTC Confirmation Procedure .............................. 179 .
On Board Diagnosis Logic .................................. 163 . Diagnostic Procedure .......................................... 180 .
Possible Cause ................................................... 163 . DTC P1843 ATF PRESSURE SWITCH 3 .............. 181 . F
DTC Confirmation Procedure .............................. 163 . Description ........................................................... 181
.
Diagnostic Procedure .......................................... 164 . CONSULT-II Reference Value ............................. 181 .
DTC P1764 DIRECT CLUTCH SOLENOID VALVE On Board Diagnosis Logic ................................... 181 . G
FUNCTION ............................................................. 165
. Possible Cause .................................................... 181
.
Description .......................................................... 165
. DTC Confirmation Procedure .............................. 181 .
CONSULT-II Reference Value ............................. 165 . Diagnostic Procedure .......................................... 182 . H
On Board Diagnosis Logic .................................. 165 . DTC P1845 ATF PRESSURE SWITCH 5 .............. 183 .
Possible Cause ................................................... 165 . Description ........................................................... 183
.
DTC Confirmation Procedure .............................. 165 . CONSULT-II Reference Value ............................. 183 .
I
Diagnostic Procedure .......................................... 166 . On Board Diagnosis Logic ................................... 183 .
DTC P1767 HIGH AND LOW REVERSE CLUTCH Possible Cause .................................................... 183
.
SOLENOID VALVE ................................................ 167 . DTC Confirmation Procedure .............................. 183 .
Description .......................................................... 167
. Diagnostic Procedure .......................................... 184 . J
CONSULT-II Reference Value ............................. 167 . DTC P1846 ATF PRESSURE SWITCH 6 .............. 185 .
On Board Diagnosis Logic .................................. 167 . Description ........................................................... 185
.
Possible Cause ................................................... 167 . CONSULT-II Reference Value ............................. 185 . K
DTC Confirmation Procedure .............................. 167 . On Board Diagnosis Logic ................................... 185 .
Diagnostic Procedure .......................................... 168 . Possible Cause .................................................... 185
.
DTC P1769 HIGH AND LOW REVERSE CLUTCH DTC Confirmation Procedure .............................. 185 . L
SOLENOID VALVE FUNCTION ............................ 169 . Diagnostic Procedure .......................................... 186 .
Description .......................................................... 169
. MAIN POWER SUPPLY AND GROUND CIRCUIT. 187
CONSULT-II Reference Value ............................. 169 . Wiring Diagram -- AT -- MAIN ........................... 187 .
On Board Diagnosis Logic .................................. 169 . Diagnostic Procedure .......................................... 188 . M
Possible Cause ................................................... 169 . CLOSED THROTTLE POSITION AND WIDE OPEN
DTC Confirmation Procedure .............................. 169 . THROTTLE POSITION CIRCUIT ........................... 191 .
Diagnostic Procedure .......................................... 170 . CONSULT-II Reference Value ............................. 191 .
DTC P1772 LOW COAST BRAKE SOLENOID Diagnostic Procedure .......................................... 191 .
VALVE .................................................................... 171
. BRAKE SIGNAL CIRCUIT ..................................... 192 .
Description .......................................................... 171
. CONSULT-II Reference Value ............................. 192 .
CONSULT-II Reference Value ............................. 171 . Diagnostic Procedure .......................................... 192 .
On Board Diagnosis Logic .................................. 171 . A/T INDICATOR CIRCUIT ...................................... 193 .
Possible Cause ................................................... 171 . Description ........................................................... 193
.
DTC Confirmation Procedure .............................. 171 . CONSULT-II Reference Value ............................. 193 .
Diagnostic Procedure .......................................... 172 . Diagnostic Procedure .......................................... 193 .
DTC P1774 LOW COAST BRAKE SOLENOID TROUBLE DIAGNOSIS FOR SYMPTOMS ........... 194 .
VALVE FUNCTION ................................................ 173 . Wiring Diagram -- AT -- NONDTC ..................... 194 .
Description .......................................................... 173
. A/T CHECK Indicator Lamp Does Not Come On . 196
CONSULT-II Reference Value ............................. 173 . Engine Cannot Be Started In "P" or "N" Position . 197
On Board Diagnosis Logic .................................. 173 . In "P" Position, Vehicle Moves When Pushed ..... 197 .
Possible Cause ................................................... 173 . In "N" Position, Vehicle Moves ............................. 198 .
Edition; 2004 September AT-3 2005 G35 Sedan
Large Shock ("N" to "D" Position) ........................ 199 . Rear Oil Seal ........................................................ 269
.
Vehicle Does Not Creep Backward In "R" Position. 202 Revolution Sensor Components (2WD Models
Vehicle Does Not Creep Forward In "D" Position . 205 Only) .................................................................... 270
.
Vehicle Cannot Be Started From D1 .................... 207 . AIR BREATHER HOSE .......................................... 275 .
A/T Does Not Shift: D1 D2 ............................... 210 . Removal and Installation ...................................... 275 .
A/T Does Not Shift: D2 D3 ............................... 212 . TRANSMISSION ASSEMBLY ................................ 276 .
A/T Does Not Shift: D3 D4 ............................... 214 . Removal and Installation ...................................... 276 .
A/T Does Not Shift: D4 D5 ............................... 217 . OVERHAUL ............................................................ 281 .
A/T Does Not Perform Lock-up ........................... 219 . Components ......................................................... 281 .
A/T Does Not Hold Lock-up Condition ................. 221 . Oil Channel .......................................................... 289
.
Lock-up Is Not Released ..................................... 223 . Locations of Adjusting Shims, Needle Bearings,
Engine Speed Does Not Return To Idle ............... 223 . Thrust Washers and Snap Rings ......................... 291 .
Cannot Be Changed to Manual Mode ................. 225 . DISASSEMBLY ...................................................... 293 .
A/T Does Not Shift: 5th Gear 4th Gear ........... 225 . Disassembly ......................................................... 293.
A/T Does Not Shift: 4th Gear 3rd Gear ........... 227 . REPAIR FOR COMPONENT PARTS ..................... 311 .
A/T Does Not Shift: 3rd Gear 2nd Gear .......... 229 . Oil Pump .............................................................. 311
.
A/T Does Not Shift: 2nd Gear 1st Gear ........... 231 . Front Sun Gear, 3rd One-Way Clutch .................. 314 .
Vehicle Does Not Decelerate By Engine Brake ... 233 . Front Carrier, Input Clutch, Rear Internal Gear .... 316 .
SHIFT CONTROL SYSTEM ................................... 235 . Mid Sun Gear, Rear Sun Gear, High and Low
Control Device Removal and Installation ............. 235 . Reverse Clutch Hub ............................................. 321 .
Control Rod Removal and Installation ................. 238 . High and Low Reverse Clutch ............................. 326 .
Adjustment of A/T Position .................................. 239 . Direct Clutch ........................................................ 328
.
Checking of A/T Position ..................................... 240 . ASSEMBLY ............................................................ 330 .
A/T SHIFT LOCK SYSTEM .................................... 241 . Assembly (1) ........................................................ 330.
Description ........................................................... 241
. Adjustment ........................................................... 343
.
Shift Lock System Electrical Parts Location ........ 241 . Assembly (2) ........................................................ 346.
Wiring Diagram -- AT -- SHIFT .......................... 242 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 353 .
A/T Device Inspection Table ................................ 243 . General Specifications ......................................... 353 .
Diagnostic Procedure .......................................... 243 . Vehicle Speed at Which Gear Shifting Occurs ..... 353 .
KEY INTERLOCK CABLE ..................................... 246 . Vehicle Speed at Which Lock-up Occurs/Releases.354
Components ........................................................ 246
. Stall Speed ........................................................... 354
.
Removal and Installation ..................................... 247 . Line Pressure ....................................................... 354.
ON-VEHICLE SERVICE ......................................... 249 . A/T Fluid Temperature Sensor ............................. 354 .
Control Valve with TCM and A/T Fluid Temperature Turbine Revolution Sensor ................................... 354 .
Sensor 2 .............................................................. 249
. Vehicle Speed Sensor A/T (Revolution Sensor) .. 355 .
Parking Components (2WD Models Only) ........... 261 . Reverse Brake ..................................................... 355 .
Total End Play ...................................................... 355.
Edition; 2004 September AT-4 2005 G35 Sedan
INDEX FOR DTC
INDEX FOR DTC PFP:00024
A
Alphabetical Index ACS005W7
NOTE:
If DTC "U1000" is displayed with other DTCs, first perform the trouble diagnosis for "DTC U1000 CAN B
COMMUNICATION LINE". Refer to AT-111 .
DTC
Items AT
OBD-II Except OBD-II Reference page
(CONSULT-II screen terms)
CONSULT-II or GST (*1) CONSULT-II only "A/T"
A/T 1ST E/BRAKING -- P1731 AT-153
D
ATF PRES SW 1/CIRC -- P1841 AT-179
ATF PRES SW 3/CIRC -- P1843 AT-181
ATF PRES SW 5/CIRC -- P1845 AT-183 E
ATF PRES SW 6/CIRC -- P1846 AT-185
A/T INTERLOCK P1730 P1730 AT-150
F
A/T TCC S/V FNCTN P0744 P0744 AT-132
ATF TEMP SEN/CIRC P0710 P1710 AT-141
CAN COMM CIRCUIT U1000 U1000 AT-111 G
D/C SOLENOID/CIRC P1762 P1762 AT-163
D/C SOLENOID FNCTN P1764 P1764 AT-165
ENGINE SPEED SIG P0725 P0725 AT-128
H
FR/B SOLENOID/CIRC P1757 P1757 AT-159
FR/B SOLENOID FNCT P1759 P1759 AT-161
I
HLR/C SOL/CIRC P1767 P1767 AT-167
HLR/C SOL FNCTN P1769 P1769 AT-169
I/C SOLENOID/CIRC P1752 P1752 AT-155 J
I/C SOLENOID FNCTN P1754 P1754 AT-157
L/PRESS SOL/CIRC P0745 P0745 AT-134
K
LC/B SOLENOID/CIRC P1772 P1772 AT-171
LC/B SOLENOID FNCT P1774 P1774 AT-173
MANU MODE SW/CIR -- P1815 AT-175 L
PNP SW/CIRC P0705 P0705 AT-119
STARTER RELAY/CIRC -- P0615 AT-114
M
TCC SOLENOID/CIRC P0740 P0740 AT-130
TCM P0700 P0700 AT-118
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