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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 ..................................................... 43
.
DTC No. Index ........................................................ 6
. A/T Electrical Parts Location ................................. 48 .
PRECAUTIONS ......................................................... 7 . Circuit Diagram ...................................................... 49
. G
Precautions for Supplemental Restraint System Inspections Before Trouble Diagnosis ................... 50 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Check Before Engine is Started ............................. 54 .
SIONER" ................................................................. 7
. Check at Idle .......................................................... 54
.
H
Precautions for On Board Diagnostic (OBD) System Cruise Test - Part 1 ................................................ 55
.
of A/T and Engine ................................................... 7. Cruise Test - Part 2 ................................................ 57
.
Precautions ............................................................. 8
. Cruise Test - Part 3 ................................................ 58
.
Service Notice or Precautions ................................. 9 . Vehicle Speed When Shifting Gears ..................... 59 . I
Wiring Diagrams and Trouble Diagnosis ................. 9 . Vehicle Speed When Performing and Releasing
PREPARATION ........................................................ 10 . Complete Lock-up ................................................. 59 .
Special Service Tools ............................................ 10 . Vehicle Speed When Performing and Releasing J
Commercial Service Tools ..................................... 12 . Slip Lock-up ........................................................... 59
.
A/T FLUID ................................................................ 13
. Symptom Chart ...................................................... 60
.
Changing A/T Fluid ............................................... 13 . TCM Input/Output Signal Reference Values .......... 82 .
K
Checking A/T Fluid ................................................ 13 . CONSULT-II Function (A/T) ................................... 83 .
A/T Fluid Cooler Cleaning ..................................... 13 . DTC U1000 CAN COMMUNICATION LINE ............. 95 .
A/T CONTROL SYSTEM ......................................... 16 . Description ............................................................. 95
.
Cross-Sectional View (2WD models) .................... 16 . On Board Diagnosis Logic ..................................... 95 . L
Cross-Sectional View (4WD models) .................... 17 . Possible Cause ...................................................... 95
.
Shift Mechanism .................................................... 18. DTC Confirmation Procedure ................................ 95 .
TCM Function ........................................................ 29
. Wiring Diagram -- AT -- CAN ............................... 96 . M
CAN Communication ............................................. 30 . Diagnostic Procedure ............................................ 98 .
Input/Output Signal of TCM ................................... 30 . DTC P0615 START SIGNAL CIRCUIT .................... 99 .
Line Pressure Control ........................................... 31 . Description ............................................................. 99
.
Shift Control .......................................................... 32
. CONSULT-II Reference Value ............................... 99 .
Lock-up Control ..................................................... 33
. On Board Diagnosis Logic ..................................... 99 .
Engine Brake Control ............................................ 35 . Possible Cause ...................................................... 99
.
Control Valve ......................................................... 35
. DTC Confirmation Procedure ................................ 99 .
ON BOARD DIAGNOSTIC (OBD) SYSTEM ........... 37 . Wiring Diagram -- AT -- STSIG ......................... 100 .
Introduction ........................................................... 37
. Diagnostic Procedure .......................................... 101 .
OBD-II Function for A/T System ............................ 37 . DTC P0700 TCM .................................................... 103 .
One or Two Trip Detection Logic of OBD-II ........... 37 . Description ........................................................... 103
.
OBD-II Diagnostic Trouble Code (DTC) ................ 37 . On Board Diagnosis Logic ................................... 103 .
Malfunction Indicator Lamp (MIL) .......................... 40 . Possible Cause .................................................... 103
.
TROUBLE DIAGNOSIS ........................................... 41 . DTC Confirmation Procedure .............................. 103 .
DTC Inspection Priority Chart ............................... 41 . Diagnostic Procedure .......................................... 103 .
Fail-Safe ................................................................ 41
. DTC P0705 PARK/NEUTRAL POSITION SWITCH. 104
Revision: October 2005 AT-1 2005 QX56
Description ........................................................... 104
. DTC P1705 THROTTLE POSITION SENSOR ....... 123 .
CONSULT-II Reference Value ............................. 104 . Description ........................................................... 123
.
On Board Diagnosis Logic ................................... 104 . CONSULT-II Reference Value .............................. 123 .
Possible Cause .................................................... 104 . On Board Diagnosis Logic ................................... 123 .
DTC Confirmation Procedure .............................. 104 . Possible Cause .................................................... 123.
Wiring Diagram -- AT -- PNP/SW ...................... 105 . DTC Confirmation Procedure ............................... 123 .
Diagnostic Procedure .......................................... 106 . Diagnostic Procedure ........................................... 123 .
DTC P0720 VEHICLE SPEED SENSOR A/T (REV- DTC P1710 A/T FLUID TEMPERATURE SENSOR
OLUTION SENSOR) .............................................. 108 . CIRCUIT ................................................................. 126
.
Description ........................................................... 108
. Description ........................................................... 126
.
CONSULT-II Reference Value ............................. 108 . CONSULT-II Reference Value .............................. 126 .
On Board Diagnosis Logic ................................... 108 . On Board Diagnosis Logic ................................... 126 .
Possible Cause .................................................... 108 . Possible Cause .................................................... 126.
DTC Confirmation Procedure .............................. 108 . DTC Confirmation Procedure ............................... 126 .
Wiring Diagram -- AT -- VSSA/T ........................ 110 . Wiring Diagram -- AT -- FTS .............................. 127 .
Diagnostic Procedure ...........................................111 . Diagnostic Procedure ........................................... 128 .
DTC P0725 ENGINE SPEED SIGNAL .................. 113 . Component Inspection ......................................... 129 .
Description ........................................................... 113
. DTC P1716 TURBINE REVOLUTION SENSOR ... 131 .
CONSULT-II Reference Value ............................. 113 . Description ........................................................... 131
.
On Board Diagnosis Logic ................................... 113 . CONSULT-II Reference Value .............................. 131 .
Possible Cause .................................................... 113 . On Board Diagnosis Logic ................................... 131 .
DTC Confirmation Procedure .............................. 113 . Possible Cause .................................................... 131.
Diagnostic Procedure .......................................... 113 . DTC Confirmation Procedure ............................... 131 .
DTC P0740 TORQUE CONVERTER CLUTCH Diagnostic Procedure ........................................... 132 .
SOLENOID VALVE ................................................ 115 . DTC P1721 VEHICLE SPEED SENSOR MTR ...... 133 .
Description ........................................................... 115
. Description ........................................................... 133
.
CONSULT-II Reference Value ............................. 115 . CONSULT-II Reference Value .............................. 133 .
On Board Diagnosis Logic ................................... 115 . On Board Diagnosis Logic ................................... 133 .
Possible Cause .................................................... 115 . Possible Cause .................................................... 133.
DTC Confirmation Procedure .............................. 115 . DTC Confirmation Procedure ............................... 133 .
Diagnostic Procedure .......................................... 116 . Diagnostic Procedure ........................................... 134 .
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP). 117 DTC P1730 A/T INTERLOCK ................................ 135 .
Description ........................................................... 117
. Description ........................................................... 135
.
CONSULT-II Reference Value ............................. 117 . On Board Diagnosis Logic ................................... 135 .
On Board Diagnosis Logic ................................... 117 . Possible Cause .................................................... 135.
Possible Cause .................................................... 117 . DTC Confirmation Procedure ............................... 135 .
DTC Confirmation Procedure .............................. 117 . Judgement of A/T Interlock .................................. 136 .
Diagnostic Procedure .......................................... 118 . Diagnostic Procedure ........................................... 136 .
DTC P0745 LINE PRESSURE SOLENOID VALVE. 119 DTC P1731 A/T 1ST ENGINE BRAKING .............. 138 .
Description ........................................................... 119
. Description ........................................................... 138
.
CONSULT-II Reference Value ............................. 119 . CONSULT-II Reference Value .............................. 138 .
On Board Diagnosis Logic ................................... 119 . On Board Diagnosis Logic ................................... 138 .
Possible Cause .................................................... 119 . Possible Cause .................................................... 138.
DTC Confirmation Procedure .............................. 119 . DTC Confirmation Procedure ............................... 138 .
Diagnostic Procedure .......................................... 120 . Diagnostic Procedure ........................................... 139 .
DTC P1702 TRANSMISSION CONTROL MODULE DTC P1752 INPUT CLUTCH SOLENOID VALVE . 140
(RAM) ..................................................................... 121
. Description ........................................................... 140
.
Description ........................................................... 121
. CONSULT-II Reference Value .............................. 140 .
On Board Diagnosis Logic ................................... 121 . On Board Diagnosis Logic ................................... 140 .
Possible Cause .................................................... 121 . Possible Cause .................................................... 140.
DTC Confirmation Procedure .............................. 121 . DTC Confirmation Procedure ............................... 140 .
Diagnostic Procedure .......................................... 121 . Diagnostic Procedure ........................................... 141 .
DTC P1703 TRANSMISSION CONTROL MODULE DTC P1754 INPUT CLUTCH SOLENOID VALVE
(ROM) ..................................................................... 122
. FUNCTION ............................................................. 142
.
Description ........................................................... 122
. Description ........................................................... 142
.
On Board Diagnosis Logic ................................... 122 . CONSULT-II Reference Value .............................. 142 .
Possible Cause .................................................... 122 . On Board Diagnosis Logic ................................... 142 .
DTC Confirmation Procedure .............................. 122 . Possible Cause .................................................... 142.
Diagnostic Procedure .......................................... 122 .
Revision: October 2005 AT-2 2005 QX56
DTC Confirmation Procedure .............................. 142 . CONSULT-II Reference Value ............................. 158 .
Diagnostic Procedure .......................................... 143 . On Board Diagnosis Logic ................................... 158 . A
DTC P1757 FRONT BRAKE SOLENOID VALVE . 144 Possible Cause .................................................... 158
.
Description .......................................................... 144
. DTC Confirmation Procedure .............................. 158 .
CONSULT-II Reference Value ............................. 144 . Diagnostic Procedure .......................................... 159 . B
On Board Diagnosis Logic .................................. 144 . DTC P1841 ATF PRESSURE SWITCH 1 .............. 160 .
Possible Cause ................................................... 144 . Description ........................................................... 160
.
DTC Confirmation Procedure .............................. 144 . CONSULT-II Reference Value ............................. 160 .
Diagnostic Procedure .......................................... 145 . On Board Diagnosis Logic ................................... 160 . AT
DTC P1759 FRONT BRAKE SOLENOID VALVE Possible Cause .................................................... 160
.
FUNCTION ............................................................. 146
. DTC Confirmation Procedure .............................. 160 .
Description .......................................................... 146
. Diagnostic Procedure .......................................... 161 . D
CONSULT-II Reference Value ............................. 146 . DTC P1843 ATF PRESSURE SWITCH 3 .............. 162 .
On Board Diagnosis Logic .................................. 146 . Description ........................................................... 162
.
Possible Cause ................................................... 146 . CONSULT-II Reference Value ............................. 162 . E
DTC Confirmation Procedure .............................. 146 . On Board Diagnosis Logic ................................... 162 .
Diagnostic Procedure .......................................... 147 . Possible Cause .................................................... 162
.
DTC P1762 DIRECT CLUTCH SOLENOID VALVE 148 . DTC Confirmation Procedure .............................. 162 .
Description .......................................................... 148
. Diagnostic Procedure .......................................... 163 . F
CONSULT-II Reference Value ............................. 148 . DTC P1845 ATF PRESSURE SWITCH 5 .............. 164 .
On Board Diagnosis Logic .................................. 148 . Description ........................................................... 164
.
Possible Cause ................................................... 148 . CONSULT-II Reference Value ............................. 164 . G
DTC Confirmation Procedure .............................. 148 . On Board Diagnosis Logic ................................... 164 .
Diagnostic Procedure .......................................... 149 . Possible Cause .................................................... 164
.
DTC P1764 DIRECT CLUTCH SOLENOID VALVE DTC Confirmation Procedure .............................. 164 . H
FUNCTION ............................................................. 150
. Diagnostic Procedure .......................................... 165 .
Description .......................................................... 150
. DTC P1846 ATF PRESSURE SWITCH 6 .............. 166 .
CONSULT-II Reference Value ............................. 150 . Description ........................................................... 166
.
I
On Board Diagnosis Logic .................................. 150 . CONSULT-II Reference Value ............................. 166 .
Possible Cause ................................................... 150 . On Board Diagnosis Logic ................................... 166 .
DTC Confirmation Procedure .............................. 150 . Possible Cause .................................................... 166
.
Diagnostic Procedure .......................................... 151 . DTC Confirmation Procedure .............................. 166 . J
DTC P1767 HIGH AND LOW REVERSE CLUTCH Diagnostic Procedure .......................................... 167 .
SOLENOID VALVE ................................................ 152 . MAIN POWER SUPPLY AND GROUND CIRCUIT. 168
Description .......................................................... 152
. Wiring Diagram -- AT -- MAIN ........................... 168 . K
CONSULT-II Reference Value ............................. 152 . Diagnostic Procedure .......................................... 169 .
On Board Diagnosis Logic .................................. 152 . CLOSED THROTTLE POSITION AND WIDE OPEN
Possible Cause ................................................... 152 . THROTTLE POSITION CIRCUIT ........................... 172 .
L
DTC Confirmation Procedure .............................. 152 . CONSULT-II Reference Value ............................. 172 .
Diagnostic Procedure .......................................... 153 . Diagnostic Procedure .......................................... 172 .
DTC P1769 HIGH AND LOW REVERSE CLUTCH BRAKE SIGNAL CIRCUIT ..................................... 173 .
SOLENOID VALVE FUNCTION ............................ 154 . CONSULT-II Reference Value ............................. 173 . M
Description .......................................................... 154
. Diagnostic Procedure .......................................... 173 .
CONSULT-II Reference Value ............................. 154 . TOW MODE SWITCH ............................................ 174 .
On Board Diagnosis Logic .................................. 154 . Description ........................................................... 174
.
Possible Cause ................................................... 154 . Wiring Diagram -- AT -- TMSW ......................... 175 .
DTC Confirmation Procedure .............................. 154 . Diagnostic Procedure .......................................... 176 .
Diagnostic Procedure .......................................... 155 . TROUBLE DIAGNOSIS FOR SYMPTOMS ........... 177 .
DTC P1772 LOW COAST BRAKE SOLENOID Wiring Diagram -- AT -- NONDTC ..................... 177 .
VALVE .................................................................... 156
. A/T CHECK Indicator Lamp Does Not Come On . 180
Description .......................................................... 156
. Engine Cannot Be Started In "P" or "N" Position . 180
CONSULT-II Reference Value ............................. 156 . In "P" Position, Vehicle Moves When Pushed ..... 181 .
On Board Diagnosis Logic .................................. 156 . In "N" Position, Vehicle Moves ............................. 182 .
Possible Cause ................................................... 156 . Large Shock ("N" to "D" Position) ........................ 183 .
DTC Confirmation Procedure .............................. 156 . Vehicle Does Not Creep Backward In "R" Position 187 .
Diagnostic Procedure .......................................... 157 . Vehicle Does Not Creep Forward In "D" Position . 190
DTC P1774 LOW COAST BRAKE SOLENOID Vehicle Cannot Be Started From D1 .................... 192 .
VALVE FUNCTION ................................................ 158 . A/T Does Not Shift: D1 D 2 ............................... 195 .
Description .......................................................... 158
. A/T Does Not Shift: D2 D 3 ............................... 197 .
Revision: October 2005 AT-3 2005 QX56
A/T Does Not Shift: D3 D 4 ............................... 199 . Components ......................................................... 250
.
A/T Does Not Shift: D4 D 5 ............................... 202 . Oil Channel .......................................................... 258
.
A/T Does Not Perform Lock-up ........................... 204 . Locations of Adjusting Shims, Needle Bearings,
A/T Does Not Hold Lock-up Condition ................. 206 . Thrust Washers and Snap Rings ......................... 260 .
Lock-up Is Not Released ..................................... 208 . DISASSEMBLY ...................................................... 262 .
Engine Speed Does Not Return to Idle ............... 209 . Disassembly ......................................................... 262
.
A/T Does Not Shift: 5th gear 4th gear ............. 210 . REPAIR FOR COMPONENT PARTS ..................... 280 .
A/T Does Not Shift: 4th gear 3rd gear ............. 213 . Oil Pump .............................................................. 280
.
A/T Does Not Shift: 3rd gear 2nd gear ............ 214 . Front Sun Gear, 3rd One-Way Clutch .................. 282 .
A/T Does Not Shift: 2nd gear 1st gear ............ 216 . Front Carrier, Input Clutch, Rear Internal Gear .... 284 .
Vehicle Does Not Decelerate By Engine Brake ... 219 . Mid Sun Gear, Rear Sun Gear, High and Low
A/T SHIFT LOCK SYSTEM .................................... 222 . Reverse Clutch Hub ............................................. 289 .
Description ........................................................... 222
. High and Low Reverse Clutch ............................. 294 .
Shift Lock System Electrical Parts Location ........ 222 . Direct Clutch ........................................................ 296
.
Wiring Diagram -- A/T -- SHIFT ......................... 223 . ASSEMBLY ............................................................ 298
.
Shift Lock Control Unit Reference Values ............ 224 . Assembly (1) ........................................................ 298
.
Component Inspection ......................................... 225 . Adjustment ........................................................... 311
.
SHIFT CONTROL SYSTEM ................................... 227 . Assembly (2) ........................................................ 314
.
Control Device Removal and Installation ............. 227 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 321 .
Adjustment of A/T Position .................................. 228 . General Specifications ......................................... 321 .
Checking of A/T Position ..................................... 228 . Vehicle Speed When Shifting Gears .................... 321 .
ON-VEHICLE SERVICE ......................................... 229 . Vehicle Speed When Performing and Releasing
Oil Pan ................................................................. 229
. Complete Lock-up ................................................ 322 .
Control Valve With TCM and A/T Fluid Temperature Vehicle Speed When Performing and Releasing
Sensor 2 .............................................................. 231
. Slip Lock-up ......................................................... 322
.
Rear Oil Seal ....................................................... 241
. Stall Speed ........................................................... 322
.
AIR BREATHER HOSE .......................................... 242 . Line Pressure ....................................................... 322
.
Removal and Installation ..................................... 242 . A/T Fluid Temperature Sensor ............................. 322 .
TRANSMISSION ASSEMBLY ............................... 244 . Turbine Revolution Sensor ................................... 322 .
Removal and Installation (4x2) ............................ 244 . Vehicle Speed Sensor A/T (Revolution Sensor) .. 322 .
Removal and Installation (4x4) ............................ 247 . Reverse brake ...................................................... 323
.
OVERHAUL ............................................................ 250. Total End Play ...................................................... 323
.
Revision: October 2005 AT-4 2005 QX56
INDEX FOR DTC
INDEX FOR DTC PFP:00024
A
Alphabetical Index ECS00CDH
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to B
AT-95, "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-138
D
ATF PRES SW 1/CIRC -- P1841 AT-160
ATF PRES SW 3/CIRC -- P1843 AT-162
ATF PRES SW 5/CIRC -- P1845 AT-164 E
ATF PRES SW 6/CIRC -- P1846 AT-166
A/T INTERLOCK P1730 P1730 AT-135
F
A/T TCC S/V FNCTN P0744 P0744 AT-117
ATF TEMP SEN/CIRC P0710 P1710 AT-126
CAN COMM CIRCUIT U1000 U1000 AT-95 G
D/C SOLENOID/CIRC P1762 P1762 AT-148
D/C SOLENOID FNCTN P1764 (*2 ) P1764 AT-150
ENGINE SPEED SIG -- P0725 AT-113
H
FR/B SOLENOID/CIRC P1757 P1757 AT-144
FR/B SOLENOID FNCT P1759 P1759 AT-146
I
HLR/C SOL/CIRC P1767 P1767 AT-152
HLR/C SOL FNCTN P1769 (*2 ) P1769 AT-154
I/C SOLENOID/CIRC P1752 P1752 AT-140 J
I/C SOLENOID FNCTN P1754 (*2 ) P1754 AT-142
L/PRESS SOL/CIRC P0745 P0745 AT-119
K
LC/B SOLENOID/CIRC P1772 P1772 AT-156
LC/B SOLENOID FNCT P1774 P1774 AT-158
PNP SW/CIRC P0705 P0705 AT-104 L
STARTER RELAY/CIRC -- P0615 AT-99
TCC SOLENOID/CIRC P0740 P0740 AT-115
M
TCM P0700 P0700 AT-103
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