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C TRANSMISSION/TRANSAXLE
A
AUTOMATIC TRANSMISSION
SECTION AT B
AT
D
E
CONTENTS
INDEX FOR DTC ....................................................... 5 . A/T Electrical Parts Location ................................. 51 . F
Alphabetical Index ................................................... 5
. Schematic .............................................................. 53
.
DTC No. Index ........................................................ 6
. Inspections Before Trouble Diagnosis ................... 54 .
PRECAUTIONS ......................................................... 7 . Check Before Engine is Started ............................. 58 . G
Precautions for Supplemental Restraint System Check at Idle .......................................................... 58
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Cruise Test - Part 1 ................................................ 59
.
SIONER" ................................................................. 7
. Cruise Test - Part 2 ................................................ 61
.
H
Precautions for On Board Diagnostic (OBD) System Cruise Test - Part 3 ................................................ 62
.
of A/T and Engine ................................................... 7. Vehicle Speed at Which Gear Shifting Occurs ...... 64 .
Precautions ............................................................. 8
. Vehicle Speed at Which Lock-up Occurs/Releases 64 ...
Service Notice or Precautions ................................. 9 . Symptom Chart ...................................................... 65
. I
PREPARATION ........................................................ 10 . TCM Input/Output Signal Reference Values .......... 87 .
Special Service Tools ............................................ 10 . CONSULT-II Function (A/T) ................................... 88 .
Commercial Service Tools ..................................... 12 . Diagnostic Procedure Without CONSULT-II ........ 102 . J
A/T FLUID ................................................................ 13
. DTC U1000 CAN COMMUNICATION LINE ........... 104 .
Changing the Automatic Transmission Fluid (ATF) 13 ... Description ........................................................... 104
.
Checking the Automatic Transmission Fluid (ATF) 14 ... On Board Diagnosis Logic ................................... 104 .
K
A/T Fluid Cooler Cleaning ..................................... 15 . Possible Cause .................................................... 104
.
A/T CONTROL SYSTEM ......................................... 19 . DTC Confirmation Procedure .............................. 104 .
Cross-Sectional View ............................................ 19 . Wiring Diagram -- AT -- CAN ............................. 105 .
Shift Mechanism .................................................... 21. Diagnostic Procedure .......................................... 106 . L
TCM Function ........................................................ 32
. DTC P0615 START SIGNAL CIRCUIT .................. 107 .
CAN Communication ............................................. 33 . Description ........................................................... 107
.
Input/Output Signal of TCM ................................... 33 . CONSULT-II Reference Value ............................. 107 . M
Line Pressure Control ........................................... 34 . On Board Diagnosis Logic ................................... 107 .
Shift Control .......................................................... 35
. Possible Cause .................................................... 107
.
Lock-up Control ..................................................... 36
. DTC Confirmation Procedure .............................. 107 .
Engine Brake Control ............................................ 37 . Wiring Diagram -- AT -- STSIG ......................... 108 .
Control Valve ......................................................... 38
. Diagnostic Procedure .......................................... 109 .
ON BOARD DIAGNOSTIC (OBD) SYSTEM ........... 40 . DTC P0700 TCM .....................................................111 .
Introduction ........................................................... 40
. Description ............................................................111
.
OBD-II Function for A/T System ............................ 40 . On Board Diagnosis Logic ....................................111 .
One or Two Trip Detection Logic of OBD-II ........... 40 . Possible Cause .....................................................111
.
OBD-II Diagnostic Trouble Code (DTC) ................ 40 . DTC Confirmation Procedure ...............................111 .
Malfunction Indicator Lamp (MIL) .......................... 43 . Diagnostic Procedure ...........................................111 .
TROUBLE DIAGNOSIS ........................................... 44 . DTC P0705 PARK/NEUTRAL POSITION SWITCH. 112
DTC Inspection Priority Chart ............................... 44 . Description ........................................................... 112
.
Fail-Safe ................................................................ 44
. CONSULT-II Reference Value ............................. 112 .
How To Perform Trouble Diagnosis For Quick and On Board Diagnosis Logic ................................... 112 .
Accurate Repair .................................................... 46. Possible Cause .................................................... 112
.
Revision: September 2005 AT-1 2006 Xterra
DTC Confirmation Procedure .............................. 112 . On Board Diagnosis Logic ................................... 134 .
Wiring Diagram -- AT -- PNP/SW ...................... 113 . Possible Cause .................................................... 134
.
Diagnostic Procedure .......................................... 114 . DTC Confirmation Procedure ............................... 134 .
DTC P0717 TURBINE REVOLUTION SENSOR ... 116 . Wiring Diagram -- AT -- FTS .............................. 135 .
Description ........................................................... 116
. Diagnostic Procedure ........................................... 136 .
CONSULT-II Reference Value ............................. 116 . Component Inspection ......................................... 138 .
On Board Diagnosis Logic ................................... 116 . DTC P1721 VEHICLE SPEED SENSOR MTR ...... 139 .
Possible Cause .................................................... 116. Description ........................................................... 139
.
DTC Confirmation Procedure .............................. 116 . CONSULT-II Reference Value .............................. 139 .
Diagnostic Procedure .......................................... 117 . On Board Diagnosis Logic ................................... 139 .
DTC P0720 VEHICLE SPEED SENSOR A/T (REV- Possible Cause .................................................... 139
.
OLUTION SENSOR) .............................................. 118 . DTC Confirmation Procedure ............................... 139 .
Description ........................................................... 118
. Diagnostic Procedure ........................................... 140 .
CONSULT-II Reference Value ............................. 118 . DTC P1730 A/T INTERLOCK ................................ 141 .
On Board Diagnosis Logic ................................... 118 . Description ........................................................... 141
.
Possible Cause .................................................... 118. On Board Diagnosis Logic ................................... 141 .
DTC Confirmation Procedure .............................. 118 . Possible Cause .................................................... 141
.
Wiring Diagram -- AT -- VSSA/T ........................ 120 . DTC Confirmation Procedure ............................... 141 .
Diagnostic Procedure .......................................... 121 . Judgement of A/T Interlock .................................. 142 .
DTC P0725 ENGINE SPEED SIGNAL .................. 123 . Diagnostic Procedure ........................................... 142 .
Description ........................................................... 123
. DTC P1731 A/T 1ST ENGINE BRAKING .............. 144 .
CONSULT-II Reference Value ............................. 123 . Description ........................................................... 144
.
On Board Diagnosis Logic ................................... 123 . CONSULT-II Reference Value .............................. 144 .
Possible Cause .................................................... 123. On Board Diagnosis Logic ................................... 144 .
DTC Confirmation Procedure .............................. 123 . Possible Cause .................................................... 144
.
Diagnostic Procedure .......................................... 124 . DTC Confirmation Procedure ............................... 144 .
DTC P0740 TORQUE CONVERTER CLUTCH Diagnostic Procedure ........................................... 145 .
SOLENOID VALVE ................................................ 125 . DTC P1752 INPUT CLUTCH SOLENOID VALVE . 146
Description ........................................................... 125
. Description ........................................................... 146
.
CONSULT-II Reference Value ............................. 125 . CONSULT-II Reference Value .............................. 146 .
On Board Diagnosis Logic ................................... 125 . On Board Diagnosis Logic ................................... 146 .
Possible Cause .................................................... 125. Possible Cause .................................................... 146
.
DTC Confirmation Procedure .............................. 125 . DTC Confirmation Procedure ............................... 146 .
Diagnostic Procedure .......................................... 126 . Diagnostic Procedure ........................................... 147 .
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP). 127 DTC P1754 INPUT CLUTCH SOLENOID VALVE
Description ........................................................... 127
. FUNCTION ............................................................. 148
.
CONSULT-II Reference Value ............................. 127 . Description ........................................................... 148
.
On Board Diagnosis Logic ................................... 127 . CONSULT-II Reference Value .............................. 148 .
Possible Cause .................................................... 127. On Board Diagnosis Logic ................................... 148 .
DTC Confirmation Procedure .............................. 127 . Possible Cause .................................................... 148
.
Diagnostic Procedure .......................................... 128 . DTC Confirmation Procedure ............................... 148 .
DTC P0745 LINE PRESSURE SOLENOID VALVE. 129 Diagnostic Procedure ........................................... 149 .
Description ........................................................... 129
. DTC P1757 FRONT BRAKE SOLENOID VALVE .. 150 .
CONSULT-II Reference Value ............................. 129 . Description ........................................................... 150
.
On Board Diagnosis Logic ................................... 129 . CONSULT-II Reference Value .............................. 150 .
Possible Cause .................................................... 129. On Board Diagnosis Logic ................................... 150 .
DTC Confirmation Procedure .............................. 129 . Possible Cause .................................................... 150
.
Diagnostic Procedure .......................................... 130 . DTC Confirmation Procedure ............................... 150 .
DTC P1705 THROTTLE POSITION SENSOR ...... 131 . Diagnostic Procedure ........................................... 151 .
Description ........................................................... 131
. DTC P1759 FRONT BRAKE SOLENOID VALVE
CONSULT-II Reference Value ............................. 131 . FUNCTION ............................................................. 152
.
On Board Diagnosis Logic ................................... 131 . Description ........................................................... 152
.
Possible Cause .................................................... 131. CONSULT-II Reference Value .............................. 152 .
DTC Confirmation Procedure .............................. 131 . On Board Diagnosis Logic ................................... 152 .
Diagnostic Procedure .......................................... 132 . Possible Cause .................................................... 152
.
DTC P1710 A/T FLUID TEMPERATURE SENSOR DTC Confirmation Procedure ............................... 152 .
CIRCUIT ................................................................. 134
. Diagnostic Procedure ........................................... 153 .
Description ........................................................... 134
. DTC P1762 DIRECT CLUTCH SOLENOID VALVE.154
CONSULT-II Reference Value ............................. 134 . Description ........................................................... 154
.
Revision: September 2005 AT-2 2006 Xterra
CONSULT-II Reference Value ............................. 154 . DTC P1845 ATF PRESSURE SWITCH 5 .............. 170 .
On Board Diagnosis Logic .................................. 154 . Description ........................................................... 170
. A
Possible Cause ................................................... 154 . CONSULT-II Reference Value ............................. 170 .
DTC Confirmation Procedure .............................. 154 . On Board Diagnosis Logic ................................... 170 .
Diagnostic Procedure .......................................... 155 . Possible Cause .................................................... 170
. B
DTC P1764 DIRECT CLUTCH SOLENOID VALVE DTC Confirmation Procedure .............................. 170 .
FUNCTION ............................................................. 156
. Diagnostic Procedure .......................................... 171 .
Description .......................................................... 156
. DTC P1846 ATF PRESSURE SWITCH 6 .............. 172 .
CONSULT-II Reference Value ............................. 156 . Description ........................................................... 172
. AT
On Board Diagnosis Logic .................................. 156 . CONSULT-II Reference Value ............................. 172 .
Possible Cause ................................................... 156 . On Board Diagnosis Logic ................................... 172 .
DTC Confirmation Procedure .............................. 156 . Possible Cause .................................................... 172
. D
Diagnostic Procedure .......................................... 157 . DTC Confirmation Procedure .............................. 172 .
DTC P1767 HIGH AND LOW REVERSE CLUTCH Diagnostic Procedure .......................................... 173 .
SOLENOID VALVE ................................................ 158 . MAIN POWER SUPPLY AND GROUND CIRCUIT. 174 E
Description .......................................................... 158
. Wiring Diagram -- AT -- MAIN ........................... 174 .
CONSULT-II Reference Value ............................. 158 . Diagnostic Procedure .......................................... 175 .
On Board Diagnosis Logic .................................. 158 . CLOSED THROTTLE POSITION AND WIDE OPEN
Possible Cause ................................................... 158 . THROTTLE POSITION CIRCUIT ........................... 178 . F
DTC Confirmation Procedure .............................. 158 . CONSULT-II Reference Value ............................. 178 .
Diagnostic Procedure .......................................... 159 . Diagnostic Procedure .......................................... 178 .
DTC P1769 HIGH AND LOW REVERSE CLUTCH BRAKE SIGNAL CIRCUIT ..................................... 179 . G
SOLENOID VALVE FUNCTION ............................ 160 . CONSULT-II Reference Value ............................. 179 .
Description .......................................................... 160
. Diagnostic Procedure .......................................... 179 .
CONSULT-II Reference Value ............................. 160 . OVERDRIVE CONTROL SWITCH ........................ 180 . H
On Board Diagnosis Logic .................................. 160 . CONSULT-II Reference Value ............................. 180 .
Possible Cause ................................................... 160 . Diagnostic Procedure .......................................... 180 .
DTC Confirmation Procedure .............................. 160 . TROUBLE DIAGNOSIS FOR SYMPTOMS ........... 182 .
I
Diagnostic Procedure .......................................... 161 . Wiring Diagram -- AT -- NONDTC ..................... 182 .
DTC P1772 LOW COAST BRAKE SOLENOID O/D OFF Indicator Lamp Does Not Come On ..... 184 .
VALVE .................................................................... 162
. Engine Cannot Be Started In "P" or "N" Position . 185
Description .......................................................... 162
. In "P" Position, Vehicle Moves When Pushed ..... 186 . J
CONSULT-II Reference Value ............................. 162 . In "N" Position, Vehicle Moves ............................. 187 .
On Board Diagnosis Logic .................................. 162 . Large Shock ("N" to "D" Position) ........................ 188 .
Possible Cause ................................................... 162 . Vehicle Does Not Creep Backward In "R" Position 190 . K
DTC Confirmation Procedure .............................. 162 . Vehicle Does Not Creep Forward In "D" Position . 193
Diagnostic Procedure .......................................... 163 . Vehicle Cannot Be Started From D1 .................... 195 .
DTC P1774 LOW COAST BRAKE SOLENOID A/T Does Not Shift: D1 D 2 ............................... 197 .
L
VALVE FUNCTION ................................................ 164 . A/T Does Not Shift: D2 D 3 ............................... 199 .
Description .......................................................... 164
. A/T Does Not Shift: D3 D 4 ............................... 201 .
CONSULT-II Reference Value ............................. 164 . A/T Does Not Shift: D4 D 5 ............................... 203 .
On Board Diagnosis Logic .................................. 164 . A/T Does Not Perform Lock-up ........................... 205 . M
Possible Cause ................................................... 164 . A/T Does Not Hold Lock-up Condition ................. 207 .
DTC Confirmation Procedure .............................. 164 . Lock-up Is Not Released ..................................... 209 .
Diagnostic Procedure .......................................... 165 . Engine Speed Does Not Return to Idle ............... 210 .
DTC P1841 ATF PRESSURE SWITCH 1 .............. 166 . A/T Does Not Shift: 5th gear 4th gear ............. 212 .
Description .......................................................... 166
. A/T Does Not Shift: 4th gear 3rd gear ............. 214 .
CONSULT-II Reference Value ............................. 166 . A/T Does Not Shift: 3rd gear 2nd gear ............ 216 .
On Board Diagnosis Logic .................................. 166 . A/T Does Not Shift: 2nd gear 1st gear ............ 218 .
Possible Cause ................................................... 166 . Vehicle Does Not Decelerate By Engine Brake ... 220 .
DTC Confirmation Procedure .............................. 166 . SHIFT CONTROL SYSTEM ................................... 222 .
Diagnostic Procedure .......................................... 167 . Control Device Removal and Installation ............. 222 .
DTC P1843 ATF PRESSURE SWITCH 3 .............. 168 . Adjustment of A/T Position .................................. 223 .
Description .......................................................... 168
. Checking of A/T Position ..................................... 223 .
CONSULT-II Reference Value ............................. 168 . A/T SHIFT LOCK SYSTEM ................................... 224 .
On Board Diagnosis Logic .................................. 168 . Description ........................................................... 224
.
Possible Cause ................................................... 168 . Shift Lock System Electrical Parts Location ........ 224 .
DTC Confirmation Procedure .............................. 168 . Wiring Diagram -- A/T -- SHIFT ......................... 225 .
Diagnostic Procedure .......................................... 169 . Diagnostic Procedure .......................................... 226 .
Revision: September 2005 AT-3 2006 Xterra
KEY INTERLOCK CABLE ..................................... 229 . Oil Pump .............................................................. 283
.
Components ........................................................ 229 . Front Sun Gear, 3rd One-Way Clutch .................. 286 .
Removal and Installation ..................................... 230 . Front Carrier, Input Clutch, Rear Internal Gear .... 288 .
ON-VEHICLE SERVICE ......................................... 232 . Mid Sun Gear, Rear Sun Gear, High and Low
Oil Pan ................................................................. 232
. Reverse Clutch Hub ............................................. 294 .
Control Valve With TCM and A/T Fluid Temperature High and Low Reverse Clutch ............................. 299 .
Sensor 2 .............................................................. 234
. Direct Clutch ........................................................ 301
.
Rear Oil Seal ....................................................... 243
. ASSEMBLY ............................................................ 303
.
AIR BREATHER HOSE .......................................... 244 . Assembly (1) ........................................................ 303
.
Removal and Installation ..................................... 244 . Adjustment ........................................................... 315
.
A/T FLUID COOLER .............................................. 246 . Assembly (2) ........................................................ 318
.
Removal and Installation ..................................... 246 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 325 .
TRANSMISSION ASSEMBLY ............................... 247 . General Specifications ......................................... 325 .
Removal and Installation (2WD) .......................... 247 . Vehicle Speed at Which Gear Shifting Occurs ..... 325 .
Removal and Installation (4WD) .......................... 251 . Vehicle Speed at Which Lock-up Occurs/Releases.325
OVERHAUL ............................................................ 254. Stall Speed ........................................................... 326
.
Components ........................................................ 254 . Line Pressure ....................................................... 326
.
Oil Channel .......................................................... 262
. A/T Fluid Temperature Sensor ............................. 326 .
Locations of Adjusting Shims, Needle Bearings, Turbine Revolution Sensor ................................... 326 .
Thrust Washers and Snap Rings ......................... 264 . Vehicle Speed Sensor A/T (Revolution Sensor) .. 326 .
DISASSEMBLY ...................................................... 266 . Reverse brake ...................................................... 326
.
Disassembly ........................................................ 266. Total End Play ...................................................... 326
.
REPAIR FOR COMPONENT PARTS ..................... 283 .
Revision: September 2005 AT-4 2006 Xterra
INDEX FOR DTC
INDEX FOR DTC PFP:00024
A
Alphabetical Index ECS00CLW
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to B
AT-104, "DTC U1000 CAN COMMUNICATION LINE" .
DTC
Items AT
OBD- II Except OBD- II Reference page
(CONSULT- II screen terms)
CONSULT- II GST (*1) CONSULT- II only "A/T"
A/T 1ST E/BRAKING -- P1731 AT-144
D
ATF PRES SW 1/CIRC -- P1841 AT-166
ATF PRES SW 3/CIRC -- P1843 AT-168
ATF PRES SW 5/CIRC -- P1845 AT-170 E
ATF PRES SW 6/CIRC -- P1846 AT-172
A/T INTERLOCK P1730 P1730 AT-141
F
A/T TCC S/V FNCTN P0744 P0744 AT-127
ATF TEMP SEN/CIRC P0710 P1710 AT-134
CAN COMM CIRCUIT U1000 U1000 AT-104 G
D/C SOLENOID/CIRC P1762 P1762 AT-154
D/C SOLENOID FNCTN P1764 (*2 ) P1764 AT-156
ENGINE SPEED SIG -- P0725 AT-123
H
FR/B SOLENOID/CIRC P1757 P1757 AT-150
FR/B SOLENOID FNCT P1759 P1759 AT-152
I
HLR/C SOL/CIRC P1767 P1767 AT-158
HLR/C SOL FNCTN P1769 (*2) P1769 AT-160
I/C SOLENOID/CIRC P1752 P1752 AT-146 J
I/C SOLENOID FNCTN P1754 (*2) P1754 AT-148
L/PRESS SOL/CIRC P0745 P0745 AT-129
K
LC/B SOLENOID/CIRC P1772 P1772 AT-162
LC/B SOLENOID FNCT P1774 P1774 AT-164
PNP SW/CIRC P0705 P0705 AT-112 L
STARTER RELAY/CIRC -- P0615 AT-107
TCC SOLENOID/CIRC P0740 P0740 AT-125
M
TCM P0700 P0700 AT-111
TP SEN/CIRC A/T -- P1705 AT-131
TURBINE REV S/CIRC P07017 P0717 AT-116
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