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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 ..................................................... 45
.
DTC No. Index ........................................................ 6
. A/T Electrical Parts Location ................................. 50 .
PRECAUTIONS ......................................................... 7 . Circuit Diagram ...................................................... 51
. G
Precautions for Supplemental Restraint System Wiring Diagram -- AT -- ....................................... 52 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Inspections Before Trouble Diagnosis ................... 58 .
SIONER" ................................................................. 7
. Check Before Engine is Started ............................. 62 .
H
Precautions for On Board Diagnostic (OBD) System Check at Idle .......................................................... 62
.
of A/T and Engine ................................................... 7. Cruise Test - Part 1 ................................................ 63
.
Precautions ............................................................. 8
. Cruise Test - Part 2 ................................................ 65
.
Service Notice or Precautions ................................. 9 . Cruise Test - Part 3 ................................................ 66
. I
Wiring Diagrams and Trouble Diagnosis ................. 9 . Vehicle Speed When Shifting Gears ..................... 67 .
PREPARATION ........................................................ 10 . Vehicle Speed When Performing and Releasing
Special Service Tools ............................................ 10 . Complete Lock-up ................................................. 67 . J
Commercial Service Tools ..................................... 12 . Vehicle Speed When Performing and Releasing
A/T FLUID ................................................................ 13
. Slip Lock-up ........................................................... 67
.
Changing A/T Fluid ............................................... 13 . Symptom Chart ...................................................... 68
.
K
Checking A/T Fluid ................................................ 13 . TCM Input/Output Signal Reference Values .......... 90 .
A/T Fluid Cooler Cleaning ..................................... 15 . CONSULT-II Function (A/T) ................................... 91 .
A/T CONTROL SYSTEM ......................................... 18 . DTC U1000 CAN COMMUNICATION LINE ........... 103 .
Cross-Sectional View (2WD models) .................... 18 . Description ........................................................... 103
. L
Cross-Sectional View (4WD models) .................... 19 . On Board Diagnosis Logic ................................... 103 .
Shift Mechanism .................................................... 20. Possible Cause .................................................... 103
.
TCM Function ........................................................ 31
. DTC Confirmation Procedure .............................. 103 . M
CAN Communication ............................................. 32 . Diagnostic Procedure .......................................... 104 .
Input/Output Signal of TCM ................................... 32 . DTC P0615 START SIGNAL CIRCUIT .................. 105 .
Line Pressure Control ........................................... 33 . Description ........................................................... 105
.
Shift Control .......................................................... 34
. CONSULT-II Reference Value ............................. 105 .
Lock-up Control ..................................................... 35
. On Board Diagnosis Logic ................................... 105 .
Engine Brake Control ............................................ 37 . Possible Cause .................................................... 105
.
Control Valve ......................................................... 37
. DTC Confirmation Procedure .............................. 105 .
ON BOARD DIAGNOSTIC (OBD) SYSTEM ........... 39 . Diagnostic Procedure .......................................... 106 .
Introduction ........................................................... 39
. DTC P0700 TCM .................................................... 108 .
OBD-II Function for A/T System ............................ 39 . Description ........................................................... 108
.
One or Two Trip Detection Logic of OBD-II ........... 39 . On Board Diagnosis Logic ................................... 108 .
OBD-II Diagnostic Trouble Code (DTC) ................ 39 . Possible Cause .................................................... 108
.
Malfunction Indicator Lamp (MIL) .......................... 42 . DTC Confirmation Procedure .............................. 108 .
TROUBLE DIAGNOSIS ........................................... 43 . Diagnostic Procedure .......................................... 108 .
DTC Inspection Priority Chart ............................... 43 . DTC P0705 PARK/NEUTRAL POSITION SWITCH. 109
Fail-Safe ................................................................ 43
. Description ........................................................... 109
.
Revision: August 2007 AT-1 2004 QX56
CONSULT-II Reference Value ............................. 109 . On Board Diagnosis Logic ................................... 129 .
On Board Diagnosis Logic ................................... 109 . Possible Cause .................................................... 129.
Possible Cause .................................................... 109 . DTC Confirmation Procedure ............................... 129 .
DTC Confirmation Procedure .............................. 109 . Diagnostic Procedure ........................................... 129 .
Diagnostic Procedure .......................................... 110 . DTC P1710 A/T FLUID TEMPERATURE SENSOR
DTC P0720 VEHICLE SPEED SENSOR A/T (REV- CIRCUIT ................................................................. 131
.
OLUTION SENSOR) .............................................. 112 . Description ........................................................... 131
.
Description ........................................................... 112
. CONSULT-II Reference Value .............................. 131 .
CONSULT-II Reference Value ............................. 112 . On Board Diagnosis Logic ................................... 131 .
On Board Diagnosis Logic ................................... 112 . Possible Cause .................................................... 131.
Possible Cause .................................................... 112 . DTC Confirmation Procedure ............................... 131 .
DTC Confirmation Procedure .............................. 112 . Diagnostic Procedure ........................................... 132 .
Diagnostic Procedure .......................................... 113 . Component Inspection ......................................... 133 .
DTC P0725 ENGINE SPEED SIGNAL .................. 115 . DTC P1716 TURBINE REVOLUTION SENSOR ... 134 .
Description ........................................................... 115
. Description ........................................................... 134
.
CONSULT-II Reference Value ............................. 115 . CONSULT-II Reference Value .............................. 134 .
On Board Diagnosis Logic ................................... 115 . On Board Diagnosis Logic ................................... 134 .
Possible Cause .................................................... 115 . Possible Cause .................................................... 134.
DTC Confirmation Procedure .............................. 115 . DTC Confirmation Procedure ............................... 134 .
Diagnostic Procedure .......................................... 115 . Diagnostic Procedure ........................................... 135 .
DTC P0740 TORQUE CONVERTER CLUTCH DTC P1721 VEHICLE SPEED SENSOR MTR ...... 136 .
SOLENOID VALVE ................................................ 118 . Description ........................................................... 136
.
Description ........................................................... 118
. CONSULT-II Reference Value .............................. 136 .
CONSULT-II Reference Value ............................. 118 . On Board Diagnosis Logic ................................... 136 .
On Board Diagnosis Logic ................................... 118 . Possible Cause .................................................... 136.
Possible Cause .................................................... 118 . DTC Confirmation Procedure ............................... 136 .
DTC Confirmation Procedure .............................. 118 . Diagnostic Procedure ........................................... 137 .
Diagnostic Procedure .......................................... 119 . DTC P1730 A/T INTERLOCK ................................ 139 .
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP). 121 Description ........................................................... 139
.
Description ........................................................... 121
. On Board Diagnosis Logic ................................... 139 .
CONSULT-II Reference Value ............................. 121 . Possible Cause .................................................... 139.
On Board Diagnosis Logic ................................... 121 . DTC Confirmation Procedure ............................... 139 .
Possible Cause .................................................... 121 . Judgement of A/T Interlock .................................. 140 .
DTC Confirmation Procedure .............................. 121 . Diagnostic Procedure ........................................... 140 .
Diagnostic Procedure .......................................... 122 . DTC P1731 A/T 1ST ENGINE BRAKING .............. 142 .
DTC P0745 LINE PRESSURE SOLENOID VALVE. 124 Description ........................................................... 142
.
Description ........................................................... 124
. CONSULT-II Reference Value .............................. 142 .
CONSULT-II Reference Value ............................. 124 . On Board Diagnosis Logic ................................... 142 .
On Board Diagnosis Logic ................................... 124 . Possible Cause .................................................... 142.
Possible Cause .................................................... 124 . DTC Confirmation Procedure ............................... 142 .
DTC Confirmation Procedure .............................. 124 . Diagnostic Procedure ........................................... 143 .
Diagnostic Procedure .......................................... 125 . DTC P1752 INPUT CLUTCH SOLENOID VALVE . 145
DTC P1702 TRANSMISSION CONTROL MODULE Description ........................................................... 145
.
(RAM) ..................................................................... 127
. CONSULT-II Reference Value .............................. 145 .
Description ........................................................... 127
. On Board Diagnosis Logic ................................... 145 .
On Board Diagnosis Logic ................................... 127 . Possible Cause .................................................... 145.
Possible Cause .................................................... 127 . DTC Confirmation Procedure ............................... 145 .
DTC Confirmation Procedure .............................. 127 . Diagnostic Procedure ........................................... 146 .
Diagnostic Procedure .......................................... 127 . DTC P1754 INPUT CLUTCH SOLENOID VALVE
DTC P1703 TRANSMISSION CONTROL MODULE FUNCTION ............................................................. 148
.
(ROM) ..................................................................... 128
. Description ........................................................... 148
.
Description ........................................................... 128
. CONSULT-II Reference Value .............................. 148 .
On Board Diagnosis Logic ................................... 128 . On Board Diagnosis Logic ................................... 148 .
Possible Cause .................................................... 128 . Possible Cause .................................................... 148.
DTC Confirmation Procedure .............................. 128 . DTC Confirmation Procedure ............................... 148 .
Diagnostic Procedure .......................................... 128 . Diagnostic Procedure ........................................... 149 .
DTC P1705 THROTTLE POSITION SENSOR ...... 129 . DTC P1757 FRONT BRAKE SOLENOID VALVE .. 151 .
Description ........................................................... 129
. Description ........................................................... 151
.
CONSULT-II Reference Value ............................. 129 . CONSULT-II Reference Value .............................. 151 .
Revision: August 2007 AT-2 2004 QX56
On Board Diagnosis Logic .................................. 151 . DTC P1841 ATF PRESSURE SWITCH 1 .............. 175 .
Possible Cause ................................................... 151 . Description ........................................................... 175
. A
DTC Confirmation Procedure .............................. 151 . CONSULT-II Reference Value ............................. 175 .
Diagnostic Procedure .......................................... 152 . On Board Diagnosis Logic ................................... 175 .
DTC P1759 FRONT BRAKE SOLENOID VALVE Possible Cause .................................................... 175
. B
FUNCTION ............................................................. 154
. DTC Confirmation Procedure .............................. 175 .
Description .......................................................... 154
. Diagnostic Procedure .......................................... 176 .
CONSULT-II Reference Value ............................. 154 . DTC P1843 ATF PRESSURE SWITCH 3 .............. 178 .
On Board Diagnosis Logic .................................. 154 . Description ........................................................... 178
. AT
Possible Cause ................................................... 154 . CONSULT-II Reference Value ............................. 178 .
DTC Confirmation Procedure .............................. 154 . On Board Diagnosis Logic ................................... 178 .
Diagnostic Procedure .......................................... 155 . Possible Cause .................................................... 178
. D
DTC P1762 DIRECT CLUTCH SOLENOID VALVE 157 . DTC Confirmation Procedure .............................. 178 .
Description .......................................................... 157
. Diagnostic Procedure .......................................... 179 .
CONSULT-II Reference Value ............................. 157 . DTC P1845 ATF PRESSURE SWITCH 5 .............. 181 . E
On Board Diagnosis Logic .................................. 157 . Description ........................................................... 181
.
Possible Cause ................................................... 157 . CONSULT-II Reference Value ............................. 181 .
DTC Confirmation Procedure .............................. 157 . On Board Diagnosis Logic ................................... 181 .
Diagnostic Procedure .......................................... 158 . Possible Cause .................................................... 181
. F
DTC P1764 DIRECT CLUTCH SOLENOID VALVE DTC Confirmation Procedure .............................. 181 .
FUNCTION ............................................................. 160
. Diagnostic Procedure .......................................... 182 .
Description .......................................................... 160
. DTC P1846 ATF PRESSURE SWITCH 6 .............. 184 . G
CONSULT-II Reference Value ............................. 160 . Description ........................................................... 184
.
On Board Diagnosis Logic .................................. 160 . CONSULT-II Reference Value ............................. 184 .
Possible Cause ................................................... 160 . On Board Diagnosis Logic ................................... 184 . H
DTC Confirmation Procedure .............................. 160 . Possible Cause .................................................... 184
.
Diagnostic Procedure .......................................... 161 . DTC Confirmation Procedure .............................. 184 .
DTC P1767 HIGH AND LOW REVERSE CLUTCH Diagnostic Procedure .......................................... 185 .
I
SOLENOID VALVE ................................................ 163 . CLOSED THROTTLE POSITION AND WIDE OPEN
Description .......................................................... 163
. THROTTLE POSITION CIRCUIT ........................... 187 .
CONSULT-II Reference Value ............................. 163 . CONSULT-II Reference Value ............................. 187 .
On Board Diagnosis Logic .................................. 163 . Diagnostic Procedure .......................................... 187 . J
Possible Cause ................................................... 163 . BRAKE SIGNAL CIRCUIT ..................................... 188 .
DTC Confirmation Procedure .............................. 163 . CONSULT-II Reference Value ............................. 188 .
Diagnostic Procedure .......................................... 164 . Diagnostic Procedure .......................................... 188 . K
DTC P1769 HIGH AND LOW REVERSE CLUTCH TOW MODE SWITCH ............................................ 189 .
SOLENOID VALVE FUNCTION ............................ 166 . Description ........................................................... 189
.
Description .......................................................... 166
. Diagnostic Procedure .......................................... 189 .
L
CONSULT-II Reference Value ............................. 166 . TROUBLE DIAGNOSIS FOR SYMPTOMS ........... 191 .
On Board Diagnosis Logic .................................. 166 . AT CHECK Indicator Lamp Does Not Come On . 191
Possible Cause ................................................... 166 . Engine Cannot Be Started In "P" or "N" Position . 192
DTC Confirmation Procedure .............................. 166 . In "P" Position, Vehicle Moves When Pushed ..... 193 . M
Diagnostic Procedure .......................................... 167 . In "N" Position, Vehicle Moves ............................. 194 .
DTC P1772 LOW COAST BRAKE SOLENOID Large Shock ("N" to "D" Position) ........................ 195 .
VALVE .................................................................... 169
. Vehicle Does Not Creep Backward In "R" Position 198 .
Description .......................................................... 169
. Vehicle Does Not Creep Forward In "D" Position . 201
CONSULT-II Reference Value ............................. 169 . Vehicle Cannot Be Started From D1 .................... 203 .
On Board Diagnosis Logic .................................. 169 . A/T Does Not Shift: D1 D 2 ............................... 206 .
Possible Cause ................................................... 169 . A/T Does Not Shift: D2 D 3 ............................... 208 .
DTC Confirmation Procedure .............................. 169 . A/T Does Not Shift: D3 D 4 ............................... 210 .
Diagnostic Procedure .......................................... 170 . A/T Does Not Shift: D4 D 5 ............................... 213 .
DTC P1774 LOW COAST BRAKE SOLENOID A/T Does Not Perform Lock-up ........................... 215 .
VALVE FUNCTION ................................................ 172 . A/T Does Not Hold Lock-up Condition ................. 217 .
Description .......................................................... 172
. Lock-up Is Not Released ..................................... 219 .
CONSULT-II Reference Value ............................. 172 . Engine Speed Does Not Return to Idle ............... 220 .
On Board Diagnosis Logic .................................. 172 . A/T Does Not Shift: 5th gear 4th gear ............. 221 .
Possible Cause ................................................... 172 . A/T Does Not Shift: 4th gear 3rd gear ............. 224 .
DTC Confirmation Procedure .............................. 172 . A/T Does Not Shift: 3rd gear 2nd gear ............ 225 .
Diagnostic Procedure .......................................... 173 .
Revision: August 2007 AT-3 2004 QX56
A/T Does Not Shift: 2nd gear 1st gear ............ 227 . REPAIR FOR COMPONENT PARTS ..................... 290 .
Vehicle Does Not Decelerate By Engine Brake ... 230 . Oil Pump .............................................................. 290
.
SHIFT CONTROL SYSTEM ................................... 233 . Front Sun Gear, 3rd One-Way Clutch .................. 292 .
Control Device Removal and Installation ............. 233 . Front Carrier, Input Clutch, Rear Internal Gear .... 295 .
Adjustment of A/T Position .................................. 234 . Mid Sun Gear, Rear Sun Gear, High and Low
Checking of A/T Position ..................................... 234 . Reverse Clutch Hub ............................................. 300 .
A/T SHIFT LOCK SYSTEM .................................... 236 . High and Low Reverse Clutch ............................. 305 .
Description ........................................................... 236
. Direct Clutch ........................................................ 307
.
Shift Lock System Electrical Parts Location ........ 236 . ASSEMBLY ............................................................ 309
.
Wiring Diagram -- A/T -- SHIFT ......................... 237 . Assembly (1) ........................................................ 309
.
Shift Lock Control Unit Reference Values ............ 238 . Adjustment ........................................................... 322
.
Component Inspection ......................................... 239 . Assembly (2) ........................................................ 324
.
ON-VEHICLE SERVICE ......................................... 241 . SERVICE DATA AND SPECIFICATIONS (SDS) ... 331 .
Control Valve With TCM and A/T Fluid Temperature General Specifications ......................................... 331 .
Sensor 2 .............................................................. 241
. Vehicle Speed When Shifting Gears .................... 331 .
Rear Oil Seal ....................................................... 252
. Vehicle Speed When Performing and Releasing
AIR BREATHER HOSE .......................................... 253 . Complete Lock-up ................................................ 332 .
Removal and Installation ..................................... 253 . Vehicle Speed When Performing and Releasing
TRANSMISSION ASSEMBLY ............................... 255 . Slip Lock-up ......................................................... 332
.
Removal and Installation (4x2) ............................ 255 . Stall Speed ........................................................... 332
.
Removal and Installation (4x4) ............................ 258 . Line Pressure ....................................................... 332
.
OVERHAUL ............................................................ 261
. A/T Fluid Temperature Sensor ............................. 332 .
Components ........................................................ 261
. Turbine Revolution Sensor ................................... 332 .
Oil Channel .......................................................... 269
. Vehicle Speed Sensor A/T (Revolution Sensor) .. 332 .
Locations of Adjusting Shims, Needle Bearings, Reverse brake ...................................................... 333
.
Thrust Washers and Snap Rings ......................... 271 . Total End Play ...................................................... 333
.
DISASSEMBLY ...................................................... 273 .
Disassembly ........................................................ 273
.
Revision: August 2007 AT-4 2004 QX56
INDEX FOR DTC
INDEX FOR DTC PFP:00024
A
Alphabetical Index UCS002BZ
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to B
AT-103 .
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-142
D
ATF PRES SW 1/CIRC -- P1841 AT-175
ATF PRES SW 3/CIRC -- P1843 AT-178
ATF PRES SW 5/CIRC -- P1845 AT-181 E
ATF PRES SW 6/CIRC -- P1846 AT-184
A/T INTERLOCK P1730 P1730 AT-139
F
A/T TCC S/V FNCTN P0744 P0744 AT-121
ATF TEMP SEN/CIRC P0710 P1710 AT-131
CAN COMM CIRCUIT U1000 U1000 AT-103 G
D/C SOLENOID/CIRC P1762 P1762 AT-157
D/C SOLENOID FNCTN P1764 (*2 ) P1764 AT-160
ENGINE SPEED SIG -- P0725 AT-115
H
FR/B SOLENOID/CIRC P1757 P1757 AT-151
FR/B SOLENOID FNCT P1759 P1759 AT-154
I
HLR/C SOL/CIRC P1767 P1767 AT-163
HLR/C SOL FNCTN P1769 (*2 ) P1769 AT-166
I/C SOLENOID/CIRC P1752 P1752 AT-145 J
I/C SOLENOID FNCTN P1754 (*2 ) P1754 AT-148
L/PRESS SOL/CIRC P0745 P0745 AT-124
K
LC/B SOLENOID/CIRC P1772 P1772 AT-169
LC/B SOLENOID FNCT P1774 P1774 AT-172
PNP SW/CIRC P0705 P0705 AT-109 L
STARTER RELAY/CIRC -- P0615 AT-105
TCC SOLENOID/CIRC P0740 P0740 AT-118
M
TCM P0700 P0700 AT-108
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