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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 Battery Service ............................... 7 . Cruise Test - Part 1 ................................................ 60
.
Precautions for On Board Diagnostic (OBD) System Cruise Test - Part 2 ................................................ 63
.
of A/T and Engine ................................................... 7. Cruise Test - Part 3 ................................................ 64
.
Precautions ............................................................. 8
. Vehicle Speed at Which Gear Shifting Occurs ...... 65 . I
Service Notice or Precautions ................................. 9 . Vehicle Speed at Which Lock-Up Occurs/Releases 65 ...
Wiring Diagrams and Trouble Diagnosis ................. 9 . Symptom Chart ...................................................... 66
.
PREPARATION ........................................................ 10 . TCM Input/Output Signal Reference Values .......... 92 . J
Special Service Tools ............................................ 10 . CONSULT-II Function (A/T) ................................... 93 .
Commercial Service Tools ......................................11 . Diagnostic Procedure Without CONSULT-II ........ 107 .
A/T FLUID ................................................................ 12
. DTC U1000 CAN COMMUNICATION LINE ........... 112 .
K
Changing A/T Fluid ............................................... 12 . Description ........................................................... 112
.
Checking A/T Fluid ................................................ 12 . On Board Diagnosis Logic ................................... 112 .
A/T Fluid Cooler Cleaning ..................................... 14 . Possible Cause .................................................... 112
.
A/T CONTROL SYSTEM ......................................... 17 . DTC Confirmation Procedure .............................. 112 . L
Cross-Sectional View ............................................ 17 . Wiring Diagram -- AT -- CAN ............................. 113 .
Shift Mechanism .................................................... 18. Diagnostic Procedure .......................................... 114 .
TCM Function ........................................................ 29
. DTC P0615 START SIGNAL CIRCUIT .................. 115 . M
CAN Communication ............................................. 30 . Description ........................................................... 115
.
Input/Output Signal of TCM ................................... 30 . CONSULT-II Reference Value ............................. 115 .
Line Pressure Control ........................................... 31 . On Board Diagnosis Logic ................................... 115 .
Shift Control .......................................................... 32
. Possible Cause .................................................... 115
.
Lock-up Control ..................................................... 34
. DTC Confirmation Procedure .............................. 115 .
Engine Brake Control ............................................ 35 . Wiring Diagram -- AT -- STSIG ......................... 116 .
Control Valve ......................................................... 36
. Diagnostic Procedure .......................................... 117 .
ON BOARD DIAGNOSTIC (OBD) SYSTEM ........... 38 . DTC P0700 TCM .................................................... 119 .
Introduction ........................................................... 38
. Description ........................................................... 119
.
OBD-II Function for A/T System ............................ 38 . On Board Diagnosis Logic ................................... 119 .
One or Two Trip Detection Logic of OBD-II ........... 38 . Possible Cause .................................................... 119
.
OBD-II Diagnostic Trouble Code (DTC) ................ 38 . DTC Confirmation Procedure .............................. 119 .
Malfunction Indicator Lamp (MIL) .......................... 41 . Diagnostic Procedure .......................................... 119 .
TROUBLE DIAGNOSIS ........................................... 42 . DTC P0705 PARK/NEUTRAL POSITION SWITCH. 120
DTC Inspection Priority Chart ............................... 42 . Description ........................................................... 120
.
Fail-Safe ................................................................ 42
. CONSULT-II Reference Value ............................. 120 .
Edition: 2004 September AT-1 2005 G35 Coupe
On Board Diagnosis Logic ................................... 120 . CONSULT-II Reference Value .............................. 139 .
Possible Cause .................................................... 120 . On Board Diagnosis Logic ................................... 139 .
DTC Confirmation Procedure .............................. 120 . Possible Cause .................................................... 139.
Wiring Diagram -- AT -- PNP/SW ...................... 121 . DTC Confirmation Procedure ............................... 139 .
Diagnostic Procedure .......................................... 122 . Diagnostic Procedure ........................................... 140 .
DTC P0720 VEHICLE SPEED SENSOR A/T (REV- DTC P1710 A/T FLUID TEMPERATURE SENSOR
OLUTION SENSOR) .............................................. 124 . CIRCUIT ................................................................. 142
.
Description ........................................................... 124
. Description ........................................................... 142
.
CONSULT-II Reference Value ............................. 124 . CONSULT-II Reference Value .............................. 142 .
On Board Diagnosis Logic ................................... 124 . On Board Diagnosis Logic ................................... 142 .
Possible Cause .................................................... 124 . Possible Cause .................................................... 142.
DTC Confirmation Procedure .............................. 124 . DTC Confirmation Procedure ............................... 142 .
Wiring Diagram -- AT -- VSSA/T ........................ 126 . Wiring Diagram -- AT -- FTS .............................. 143 .
Diagnostic Procedure .......................................... 127 . Diagnostic Procedure ........................................... 144 .
DTC P0725 ENGINE SPEED SIGNAL .................. 129 . Component Inspection ......................................... 146 .
Description ........................................................... 129
. DTC P1716 TURBINE REVOLUTION SENSOR ... 147 .
CONSULT-II Reference Value ............................. 129 . Description ........................................................... 147
.
On Board Diagnosis Logic ................................... 129 . CONSULT-II Reference Value .............................. 147 .
Possible Cause .................................................... 129 . On Board Diagnosis Logic ................................... 147 .
DTC Confirmation Procedure .............................. 129 . Possible Cause .................................................... 147.
Diagnostic Procedure .......................................... 130 . DTC Confirmation Procedure ............................... 147 .
DTC P0740 TORQUE CONVERTER CLUTCH Diagnostic Procedure ........................................... 148 .
SOLENOID VALVE ................................................ 131 . DTC P1721 VEHICLE SPEED SENSOR MTR ...... 149 .
Description ........................................................... 131
. Description ........................................................... 149
.
CONSULT-II Reference Value ............................. 131 . CONSULT-II Reference Value .............................. 149 .
On Board Diagnosis Logic ................................... 131 . On Board Diagnosis Logic ................................... 149 .
Possible Cause .................................................... 131 . Possible Cause .................................................... 149.
DTC Confirmation Procedure .............................. 131 . DTC Confirmation Procedure ............................... 149 .
Diagnostic Procedure .......................................... 132 . Diagnostic Procedure ........................................... 150 .
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP). 133 DTC P1730 A/T INTERLOCK ................................ 151 .
Description ........................................................... 133
. Description ........................................................... 151
.
CONSULT-II Reference Value ............................. 133 . On Board Diagnosis Logic ................................... 151 .
On Board Diagnosis Logic ................................... 133 . Possible Cause .................................................... 151.
Possible Cause .................................................... 133 . DTC Confirmation Procedure ............................... 151 .
DTC Confirmation Procedure .............................. 133 . Judgement of A/T Interlock .................................. 152 .
Diagnostic Procedure .......................................... 134 . Diagnostic Procedure ........................................... 152 .
DTC P0745 LINE PRESSURE SOLENOID VALVE. 135 DTC P1731 A/T 1ST ENGINE BRAKING .............. 154 .
Description ........................................................... 135
. Description ........................................................... 154
.
CONSULT-II Reference Value ............................. 135 . CONSULT-II Reference Value .............................. 154 .
On Board Diagnosis Logic ................................... 135 . On Board Diagnosis Logic ................................... 154 .
Possible Cause .................................................... 135 . Possible Cause .................................................... 154.
DTC Confirmation Procedure .............................. 135 . DTC Confirmation Procedure ............................... 154 .
Diagnostic Procedure .......................................... 136 . Diagnostic Procedure ........................................... 155 .
DTC P1702 TRANSMISSION CONTROL MODULE DTC P1752 INPUT CLUTCH SOLENOID VALVE . 156
(RAM) ..................................................................... 137
. Description ........................................................... 156
.
Description ........................................................... 137
. CONSULT-II Reference Value .............................. 156 .
On Board Diagnosis Logic ................................... 137 . On Board Diagnosis Logic ................................... 156 .
Possible Cause .................................................... 137 . Possible Cause .................................................... 156.
DTC Confirmation Procedure .............................. 137 . DTC Confirmation Procedure ............................... 156 .
Diagnostic Procedure .......................................... 137 . Diagnostic Procedure ........................................... 157 .
DTC P1703 TRANSMISSION CONTROL MODULE DTC P1754 INPUT CLUTCH SOLENOID VALVE
(ROM) ..................................................................... 138
. FUNCTION ............................................................. 158
.
Description ........................................................... 138
. Description ........................................................... 158
.
On Board Diagnosis Logic ................................... 138 . CONSULT-II Reference Value .............................. 158 .
Possible Cause .................................................... 138 . On Board Diagnosis Logic ................................... 158 .
DTC Confirmation Procedure .............................. 138 . Possible Cause .................................................... 158.
Diagnostic Procedure .......................................... 138 . DTC Confirmation Procedure ............................... 158 .
DTC P1705 THROTTLE POSITION SENSOR ...... 139 . Diagnostic Procedure ........................................... 159 .
Description ........................................................... 139
. DTC P1757 FRONT BRAKE SOLENOID VALVE .. 160 .
Edition: 2004 September AT-2 2005 G35 Coupe
Description .......................................................... 160
. DTC Confirmation Procedure .............................. 174 .
CONSULT-II Reference Value ............................. 160 . Diagnostic Procedure .......................................... 175 . A
On Board Diagnosis Logic .................................. 160 . DTC P1815 MANUAL MODE SWITCH ................. 176 .
Possible Cause ................................................... 160 . Description ........................................................... 176
.
DTC Confirmation Procedure .............................. 160 . CONSULT-II Reference Value ............................. 176 . B
Diagnostic Procedure .......................................... 161 . On Board Diagnosis Logic ................................... 176 .
DTC P1759 FRONT BRAKE SOLENOID VALVE Possible Cause .................................................... 176
.
FUNCTION ............................................................. 162
. DTC Confirmation Procedure .............................. 176 .
Description .......................................................... 162
. Wiring Diagram -- AT -- MMSW ........................ 177 . AT
CONSULT-II Reference Value ............................. 162 . Diagnostic Procedure .......................................... 178 .
On Board Diagnosis Logic .................................. 162 . Component Inspection ......................................... 179 .
Possible Cause ................................................... 162 . DTC P1841 ATF PRESSURE SWITCH 1 .............. 180 . D
DTC Confirmation Procedure .............................. 162 . Description ........................................................... 180
.
Diagnostic Procedure .......................................... 163 . CONSULT-II Reference Value ............................. 180 .
DTC P1762 DIRECT CLUTCH SOLENOID VALVE 164 . On Board Diagnosis Logic ................................... 180 . E
Description .......................................................... 164
. Possible Cause .................................................... 180
.
CONSULT-II Reference Value ............................. 164 . DTC Confirmation Procedure .............................. 180 .
On Board Diagnosis Logic .................................. 164 . Diagnostic Procedure .......................................... 181 .
Possible Cause ................................................... 164 . DTC P1843 ATF PRESSURE SWITCH 3 .............. 182 . F
DTC Confirmation Procedure .............................. 164 . Description ........................................................... 182
.
Diagnostic Procedure .......................................... 165 . CONSULT-II Reference Value ............................. 182 .
DTC P1764 DIRECT CLUTCH SOLENOID VALVE On Board Diagnosis Logic ................................... 182 . G
FUNCTION ............................................................. 166
. Possible Cause .................................................... 182
.
Description .......................................................... 166
. DTC Confirmation Procedure .............................. 182 .
CONSULT-II Reference Value ............................. 166 . Diagnostic Procedure .......................................... 183 . H
On Board Diagnosis Logic .................................. 166 . DTC P1845 ATF PRESSURE SWITCH 5 .............. 184 .
Possible Cause ................................................... 166 . Description ........................................................... 184
.
DTC Confirmation Procedure .............................. 166 . CONSULT-II Reference Value ............................. 184 .
I
Diagnostic Procedure .......................................... 167 . On Board Diagnosis Logic ................................... 184 .
DTC P1767 HIGH AND LOW REVERSE CLUTCH Possible Cause .................................................... 184
.
SOLENOID VALVE ................................................ 168 . DTC Confirmation Procedure .............................. 184 .
Description .......................................................... 168
. Diagnostic Procedure .......................................... 185 . J
CONSULT-II Reference Value ............................. 168 . DTC P1846 ATF PRESSURE SWITCH 6 .............. 186 .
On Board Diagnosis Logic .................................. 168 . Description ........................................................... 186
.
Possible Cause ................................................... 168 . CONSULT-II Reference Value ............................. 186 . K
DTC Confirmation Procedure .............................. 168 . On Board Diagnosis Logic ................................... 186 .
Diagnostic Procedure .......................................... 169 . Possible Cause .................................................... 186
.
DTC P1769 HIGH AND LOW REVERSE CLUTCH DTC Confirmation Procedure .............................. 186 . L
SOLENOID VALVE FUNCTION ............................ 170 . Diagnostic Procedure .......................................... 187 .
Description .......................................................... 170
. MAIN POWER SUPPLY AND GROUND CIRCUIT. 188
CONSULT-II Reference Value ............................. 170 . Wiring Diagram -- AT -- MAIN ........................... 188 .
On Board Diagnosis Logic .................................. 170 . Diagnostic Procedure .......................................... 189 . M
Possible Cause ................................................... 170 . CLOSED THROTTLE POSITION AND WIDE OPEN
DTC Confirmation Procedure .............................. 170 . THROTTLE POSITION CIRCUIT ........................... 192 .
Diagnostic Procedure .......................................... 171 . CONSULT-II Reference Value ............................. 192 .
DTC P1772 LOW COAST BRAKE SOLENOID Diagnostic Procedure .......................................... 192 .
VALVE .................................................................... 172
. BRAKE SIGNAL CIRCUIT ..................................... 193 .
Description .......................................................... 172
. CONSULT-II Reference Value ............................. 193 .
CONSULT-II Reference Value ............................. 172 . Diagnostic Procedure .......................................... 193 .
On Board Diagnosis Logic .................................. 172 . A/T INDICATOR CIRCUIT ...................................... 194 .
Possible Cause ................................................... 172 . Description ........................................................... 194
.
DTC Confirmation Procedure .............................. 172 . CONSULT-II Reference Value ............................. 194 .
Diagnostic Procedure .......................................... 173 . Diagnostic Procedure .......................................... 194 .
DTC P1774 LOW COAST BRAKE SOLENOID TROUBLE DIAGNOSIS FOR SYMPTOMS ........... 195 .
VALVE FUNCTION ................................................ 174 . Wiring Diagram -- AT -- NONDTC ..................... 195 .
Description .......................................................... 174
. A/T CHECK Indicator Lamp Does Not Come On . 197
CONSULT-II Reference Value ............................. 174 . Engine Cannot Be Started In "P" or "N" Position . 198
On Board Diagnosis Logic .................................. 174 . In "P" Position, Vehicle Moves When Pushed ..... 198 .
Possible Cause ................................................... 174 . In "N" Position, Vehicle Moves ............................. 199 .
Edition: 2004 September AT-3 2005 G35 Coupe
Large Shock ("N" to "D" Position) ........................ 200 . Rear Oil Seal ........................................................ 267
.
Vehicle Does Not Creep Backward In "R" Position. 203 Revolution Sensor ................................................ 268.
Vehicle Does Not Creep Forward In "D" Position . 206 AIR BREATHER HOSE .......................................... 273 .
Vehicle Cannot Be Started From D1 .................... 208 . Removal and Installation ...................................... 273 .
A/T Does Not Shift: D1 D2 ............................... 211 . TRANSMISSION ASSEMBLY ................................ 274 .
A/T Does Not Shift: D2 D3 ............................... 213 . Removal and Installation ...................................... 274 .
A/T Does Not Shift: D3 D4 ............................... 215 . OVERHAUL ............................................................ 278
.
A/T Does Not Shift: D4 D5 ............................... 218 . Components ......................................................... 278
.
A/T Does Not Perform Lock-up ........................... 220 . Oil Channel .......................................................... 284
.
A/T Does Not Hold Lock-up Condition ................. 222 . Locations of Adjusting Shims, Needle Bearings,
Lock-up Is Not Released ..................................... 224 . Thrust Washers and Snap Rings ......................... 285 .
Engine Speed Does Not Return To Idle ............... 224 . DISASSEMBLY ...................................................... 286 .
Cannot Be Changed to Manual Mode ................. 226 . Disassembly ......................................................... 286
.
A/T Does Not Shift: 5th Gear 4th Gear ........... 226 . REPAIR FOR COMPONENT PARTS ..................... 302 .
A/T Does Not Shift: 4th Gear 3rd Gear ........... 228 . Oil Pump .............................................................. 302
.
A/T Does Not Shift: 3rd Gear 2nd Gear .......... 230 . Front Sun Gear, 3rd One-Way Clutch .................. 305 .
A/T Does Not Shift: 2nd Gear 1st Gear ........... 232 . Front Carrier, Input Clutch, Rear Internal Gear .... 307 .
Vehicle Does Not Decelerate By Engine Brake ... 234 . Mid Sun Gear, Rear Sun Gear, High and Low
SHIFT CONTROL SYSTEM ................................... 236 . Reverse Clutch Hub ............................................. 312 .
Control Device Removal and Installation ............. 236 . High and Low Reverse Clutch ............................. 317 .
Control Rod Removal and Installation ................. 238 . Direct Clutch ........................................................ 319
.
Adjustment of A/T Position .................................. 238 . ASSEMBLY ............................................................ 321
.
Checking of A/T Position ..................................... 239 . Assembly (1) ........................................................ 321
.
A/T SHIFT LOCK SYSTEM .................................... 240 . Adjustment ........................................................... 333
.
Description ........................................................... 240
. Assembly (2) ........................................................ 335
.
Shift Lock System Electrical Parts Location ........ 240 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 343 .
Wiring Diagram -- AT -- SHIFT .......................... 241 . General Specifications ......................................... 343 .
A/T Device Inspection Table ................................ 242 . Vehicle Speed at Which Gear Shifting Occurs ..... 343 .
Diagnostic Procedure .......................................... 242 . Vehicle Speed at Which Lock-Up Occurs/Releases.343
KEY INTERLOCK CABLE ..................................... 245 . Stall Speed ........................................................... 343
.
Components ........................................................ 245
. Line Pressure ....................................................... 343
.
Removal and Installation ..................................... 246 . A/T Fluid Temperature Sensor ............................. 344 .
ON-VEHICLE SERVICE ......................................... 248 . Turbine Revolution Sensor ................................... 344 .
Control Valve with TCM and A/T Fluid Temperature Vehicle Speed Sensor A/T (Revolution Sensor) .. 344 .
Sensor 2 .............................................................. 248
. Reverse Brake ..................................................... 344
.
Parking Components ........................................... 260 . Total End Play ...................................................... 344
.
Edition: 2004 September AT-4 2005 G35 Coupe
INDEX FOR DTC
INDEX FOR DTC PFP:00024
A
Alphabetical Index ACS005G7
NOTE:
If DTC "U1000" is displayed with other DTCs, first perform the trouble diagnosis for "DTC U1000 CAN B
COMMUNICATION LINE". Refer to AT-112 .
DTC
Items OBD-II Except OBD-II AT
Reference page
(CONSULT-II screen terms)
CONSULT-II only
CONSULT-II or GST*1
"A/T"
A/T 1ST E/BRAKING -- P1731 AT-154 D
ATF PRES SW 1/CIRC -- P1841 AT-180
ATF PRES SW 3/CIRC -- P1843 AT-182
E
ATF PRES SW 5/CIRC -- P1845 AT-184
ATF PRES SW 6/CIRC -- P1846 AT-186
A/T INTERLOCK P1730 P1730 AT-151 F
A/T TCC S/V FNCTN P0744 P0744 AT-133
ATF TEMP SEN/CIRC P0710 P1710 AT-142
G
CAN COMM CIRCUIT U1000 U1000 AT-112
D/C SOLENOID/CIRC P1762 P1762 AT-164
D/C SOLENOID FNCTN P1764 P1764 AT-166 H
ENGINE SPEED SIG P0725 P0725 AT-129
FR/B SOLENOID/CIRC P1757 P1757 AT-160
I
FR/B SOLENOID FNCT P1759 P1759 AT-162
HLR/C SOL/CIRC P1767 P1767 AT-168
HLR/C SOL FNCTN P1769 P1769 AT-170 J
I/C SOLENOID/CIRC P1752 P1752 AT-156
I/C SOLENOID FNCTN P1754 P1754 AT-158
L/PRESS SOL/CIRC P0745 P0745 AT-135 K
LC/B SOLENOID/CIRC P1772 P1772 AT-172
LC/B SOLENOID FNCT P1774 P1774 AT-174
L
MANU MODE SW/CIR -- P1815 AT-176
PNP SW/CIRC P0705 P0705 AT-120
STARTER RELAY/CIRC -- P0615 AT-115 M
TCC SOLENOID/CIRC P0740 P0740 AT-131
TCM P0700 P0700 AT-119
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