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TRANSMISSION/TRANSAXLE
A
AUTOMATIC TRANSAXLE
SECTION AT B
AT
D
E
CONTENTS
SERVICE INFORMATION ........................... 5
. TROUBLE DIAGNOSIS .................................... 39 F
DTC Inspection Priority Chart .................................39 .
INDEX FOR DTC ................................................ 5
. Fail-Safe .................................................................39
.
Alphabetical Index .................................................... 5
. How To Perform Trouble Diagnosis for Quick and G
DTC No. Index ......................................................... 5
. Accurate Repair ......................................................41
.
A/T Electrical Parts Location ..................................47 .
PRECAUTIONS .................................................. 7
. Circuit Diagram .......................................................49
.
Precaution for Supplemental Restraint System H
Inspections Before Trouble Diagnosis ....................49 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
Check Before Engine Is Started .............................54 .
SIONER" .................................................................. 7
.
Check at Idle ...........................................................54
.
Precaution for On Board Diagnosis (OBD) System Cruise Test - Part 1 ................................................55. I
of A/T and Engine .................................................... 7.
Cruise Test - Part 2 ................................................57.
Precaution for A/T Assembly or TCM Replace- Cruise Test - Part 3 ................................................57.
ment ......................................................................... 7
.
Shift Schedule ........................................................58
. J
Precaution ................................................................ 8
. Symptom Chart .......................................................59.
Service Notice or Precaution .................................... 9 . TCM Input/Output Signal Reference Value ............66 .
PREPARATION .................................................10
. CONSULT-III Function (TRANSMISSION) .............69 . K
Special Service Tool .............................................. 10
. Diagnosis Procedure ..............................................74 .
Commercial Service Tool ....................................... 12
. DTC U1000 CAN COMMUNICATION LINE ..... 77
Description ..............................................................77
. L
A/T FLUID ..........................................................13
.
Changing A/T Fluid ................................................ 13
. On Board Diagnosis Logic ......................................77 .
Checking A/T Fluid ................................................. 13
. Possible Cause .......................................................77
.
A/T Fluid Cooler Cleaning ...................................... 14
. DTC Confirmation Procedure .................................77 . M
Wiring Diagram - AT - CAN ....................................78 .
A/T CONTROL SYSTEM ...................................18
. Diagnosis Procedure ..............................................79 .
Cross-Sectional View ............................................. 18.
DTC P0500 VEHICLE SPEED SENSOR MTR... 80 N
Shift Mechanism ..................................................... 18
.
TCM Function ......................................................... 30
. Description ..............................................................80
.
Input/Output Signal of TCM .................................... 32 . On Board Diagnosis Logic ......................................80 .
CAN Communication .............................................. 32 . Possible Cause .......................................................80
. O
Line Pressure Control ............................................ 32. DTC Confirmation Procedure .................................80 .
Shift Control ........................................................... 33
. Diagnosis Procedure ..............................................80 .
Lock-Up Control ..................................................... 34
. DTC P0613 TCM PROCESSOR ....................... 82 P
ON BOARD DIAGNOSTIC (OBD) SYSTEM .....36
. Description ..............................................................82
.
Introduction ............................................................ 36
. On Board Diagnosis Logic ......................................82 .
OBD-II Function for A/T System ............................. 36 . Possible Cause .......................................................82
.
One or Two Trip Detection Logic of OBD-II ........... 36 . DTC Confirmation Procedure .................................82 .
OBD-II Diagnostic Trouble Code (DTC) ................. 36 . Diagnosis Procedure ..............................................82 .
Malfunction Indicator Lamp (MIL) ........................... 38 .
Revision: August 2007 AT-1 2008 Quest
DTC P0705 PARK/NEUTRAL POSITION On Board Diagnosis Logic ................................... 108 .
SWITCH ............................................................ 83
. Possible Cause .................................................... 108
.
Description ............................................................. 83
. DTC Confirmation Procedure ............................... 108 .
On Board Diagnosis Logic ..................................... 83 . Wiring Diagram - AT - 1STSIG ............................ 109 .
Possible Cause ...................................................... 83
. Diagnosis Procedure ............................................ 110
.
DTC Confirmation Procedure ................................ 83 .
Wiring Diagram - AT - PNP/SW ............................. 84 .
DTC P0732 A/T 2ND GEAR FUNCTION ........ 111
.
Description ........................................................... 111
.
Diagnosis Procedure ............................................. 85 .
On Board Diagnosis Logic ................................... 111 .
Component Inspection ........................................... 87 .
Possible Cause .................................................... 111
.
DTC P0710 A/T FLUID TEMPERATURE SEN- DTC Confirmation Procedure ............................... 111 .
SOR CIRCUIT ................................................... 88
. Wiring Diagram - AT - 2NDSIG ............................ 113 .
Description ............................................................. 88
. Diagnosis Procedure ............................................ 115 .
On Board Diagnosis Logic ..................................... 88 .
DTC P0733 A/T 3RD GEAR FUNCTION ........ 116
.
Possible Cause ...................................................... 88
.
Description ........................................................... 116
.
DTC Confirmation Procedure ................................ 88 .
On Board Diagnosis Logic ................................... 116 .
Wiring Diagram - AT - FTS .................................... 89 .
Possible Cause .................................................... 116
.
Diagnosis Procedure ............................................. 90 .
DTC Confirmation Procedure ............................... 116 .
Component Inspection ........................................... 91 .
Wiring Diagram - AT - 3RDSIG ............................ 117 .
DTC P0711 FLUID TEMPERATURE SENSOR Diagnosis Procedure ............................................ 119 .
PERFORMANCE .............................................. 93
. DTC P0734 A/T 4TH GEAR FUNCTION ......... 120
.
Description ............................................................. 93
. Description ........................................................... 120
.
On Board Diagnosis Logic ..................................... 93 . On Board Diagnosis Logic ................................... 120 .
Possible Cause ...................................................... 93
. Possible Cause .................................................... 120
.
DTC Confirmation Procedure ................................ 93 . DTC Confirmation Procedure ............................... 120 .
Wiring Diagram - AT - FTSP .................................. 94 . Wiring Diagram - AT - 4THSIG ............................ 121 .
Diagnosis Procedure ............................................. 95 . Diagnosis Procedure ............................................ 122 .
Component Inspection ........................................... 96 .
DTC P0735 A/T 5TH GEAR FUNCTION ......... 123
.
DTC P0717 TURBINE REVOLUTION SEN- Description ........................................................... 123
.
SOR CIRCUIT ................................................... 98
. On Board Diagnosis Logic ................................... 123 .
Description ............................................................. 98
. Possible Cause .................................................... 123
.
On Board Diagnosis Logic ..................................... 98 . DTC Confirmation Procedure ............................... 123 .
Possible Cause ...................................................... 98
. Wiring Diagram - AT - 5THSIG ............................ 124 .
DTC Confirmation Procedure ................................ 98 . Diagnosis Procedure ............................................ 126 .
Wiring Diagram - AT - TRSC ................................. 99 .
Diagnosis Procedure ............................................100 . DTC P0744 A/T TCC S/V FUNCTION (LOCK-
Component Inspection ..........................................100 . UP) ................................................................... 127
.
Description ........................................................... 127
.
DTC P0722 VEHICLE SPEED SENSOR A/T On Board Diagnosis Logic ................................... 127 .
(REVOLUTION SENSOR) CIRCUIT ............... 102
. Possible Cause .................................................... 127
.
Description ............................................................102
. DTC Confirmation Procedure ............................... 127 .
On Board Diagnosis Logic ....................................102 . Wiring Diagram - AT - TCCSIG ............................ 128 .
Possible Cause .....................................................102
. Diagnosis Procedure ............................................ 129 .
DTC Confirmation Procedure ...............................102 .
Wiring Diagram - AT - VSSATC ............................103 . DTC P0745 PRESSURE CONTROL SOLE-
Diagnosis Procedure ............................................104 . NOID VALVE A (LINE PRESSURE) ............... 130
.
Component Inspection ..........................................104 . Description ........................................................... 130
.
On Board Diagnosis Logic ................................... 130 .
DTC P0726 ENGINE SPEED INPUT CIRCUIT Possible Cause .................................................... 130
.
PERFORMANCE ............................................ 106
. DTC Confirmation Procedure ............................... 130 .
Description ............................................................106
. Wiring Diagram - AT - PC/A ................................. 131 .
On Board Diagnosis Logic ....................................106 . Diagnosis Procedure ............................................ 132 .
Possible Cause .....................................................106
. Component Inspection ......................................... 134 .
DTC Confirmation Procedure ...............................106 .
Diagnosis Procedure ............................................106 . DTC P0750 SHIFT SOLENOID VALVE A ....... 135
.
Description ........................................................... 135
.
DTC P0731 A/T 1ST GEAR FUNCTION ........ 108
. On Board Diagnosis Logic ................................... 135 .
Description ............................................................108
.
Revision: August 2007 AT-2 2008 Quest
Possible Cause .................................................... 135
. Component Inspection .......................................... 168
.
DTC Confirmation Procedure ............................... 135 . A
Wiring Diagram - AT - SSV/A ............................... 136 . DTC P0780 SHIFT ........................................... 170
Diagnosis Procedure ............................................ 137
. Description ............................................................ 170
.
Component Inspection ......................................... 138
. On Board Diagnosis Logic .................................... 170 .
Possible Cause ..................................................... 170
. B
DTC P0755 SHIFT SOLENOID VALVE B ...... 140
. DTC Confirmation Procedure ............................... 170 .
Description ........................................................... 140
. Wiring Diagram - AT - SFTFNC ............................ 171 .
On Board Diagnosis Logic ................................... 140 . Diagnosis Procedure ............................................ 173 . AT
Possible Cause .................................................... 140
.
DTC Confirmation Procedure ............................... 140 . DTC P0795 PRESSURE CONTROL SOLE-
Wiring Diagram - AT - SSV/B ............................... 141 . NOID VALVE C (TCC AND SHIFT PRES- D
Diagnosis Procedure ............................................ 142 . SURE) .............................................................. 174
Component Inspection ......................................... 143 . Description ............................................................ 174
.
On Board Diagnosis Logic .................................... 174 .
DTC P0760 SHIFT SOLENOID VALVE C ...... 145
. Possible Cause ..................................................... 174
. E
Description ........................................................... 145
. DTC Confirmation Procedure ............................... 174 .
On Board Diagnosis Logic ................................... 145 . Wiring Diagram - AT - PC/C ................................. 175 .
Possible Cause .................................................... 145
. Diagnosis Procedure ............................................ 176 . F
DTC Confirmation Procedure ............................... 145 . Component Inspection .......................................... 177 .
Wiring Diagram - AT - SSV/C ............................... 146 .
Diagnosis Procedure ............................................ 147 . DTC P0797 PRESSURE CONTROL SOLE-
G
Component Inspection ......................................... 148 . NOID VALVE C STUCK ON ........................... 179
Description ............................................................ 179
.
DTC P0762 SHIFT SOLENOID VALVE C On Board Diagnosis Logic .................................... 179 .
STUCK ON ...................................................... 150
. Possible Cause ..................................................... 179
. H
Description ........................................................... 150
. DTC Confirmation Procedure ............................... 179 .
On Board Diagnosis Logic ................................... 150 . Wiring Diagram - AT - PC/CS ............................... 180 .
Possible Cause .................................................... 150
. Diagnosis Procedure ............................................ 181 . I
DTC Confirmation Procedure ............................... 150 . Component Inspection .......................................... 182 .
Wiring Diagram - AT - SSV/CS ............................ 151 .
Diagnosis Procedure ............................................ 152 . DTC P0825 LEVER SWITCH CIRCUIT .......... 184
J
Component Inspection ......................................... 153 . Description ............................................................ 184
.
On Board Diagnosis Logic .................................... 184 .
DTC P0765 SHIFT SOLENOID VALVE D ...... 155
. Possible Cause ..................................................... 184
.
Description ........................................................... 155
. DTC Confirmation Procedure ............................... 184 . K
On Board Diagnosis Logic ................................... 155 . Wiring Diagram - AT - LVRSW ............................. 185 .
Possible Cause .................................................... 155
. Diagnosis Procedure ............................................ 186 .
DTC Confirmation Procedure ............................... 155 . Component Inspection .......................................... 187 . L
Wiring Diagram - AT - SSV/D ............................... 156 .
Diagnosis Procedure ............................................ 157 . DTC P0882 TCM POWER INPUT SIGNAL .... 188
Component Inspection ......................................... 158 . Description ............................................................ 188
.
On Board Diagnosis Logic .................................... 188 . M
DTC P0770 SHIFT SOLENOID VALVE E ....... 160
. Possible Cause ..................................................... 188
.
Description ........................................................... 160
. DTC Confirmation Procedure ............................... 188 .
On Board Diagnosis Logic ................................... 160 . Wiring Diagram - AT - PWR/IN ............................. 189 . N
Possible Cause .................................................... 160
. Diagnosis Procedure ............................................ 190 .
DTC Confirmation Procedure ............................... 160 . Component Inspection .......................................... 191 .
Wiring Diagram - AT - SSV/E ............................... 161 .
DTC P1726 ELECTRIC THROTTLE CON- O
Diagnosis Procedure ............................................ 162 .
Component Inspection ......................................... 163 . TROL SYSTEM ............................................... 192
Description ............................................................ 192
.
DTC P0775 PRESSURE CONTROL SOLE- P
NOID VALVE B (SHIFT PRESSURE) ............. 165
. TROUBLE DIAGNOSIS FOR SYMPTOMS .... 193
Description ........................................................... 165
. O/D OFF Indicator Lamp Does Not Come On ...... 193 .
On Board Diagnosis Logic ................................... 165 . Engine Cannot Be Started in "P" or "N" Position .. 194
Possible Cause .................................................... 165
. In "P" Position, Vehicle Moves When Pushed ...... 195 .
DTC Confirmation Procedure ............................... 165 . In "N" Position, Vehicle Moves ............................. 195
.
Wiring Diagram - AT - PC/B ................................. 166 . Large Shock ("N" to "D" Position) ......................... 196
.
Diagnosis Procedure ............................................ 167 . Vehicle Does Not Creep Backward in "R" Position 196 ..
Revision: August 2007 AT-3 2008 Quest
Vehicle Does Not Creep Forward in "D" or "L" Po- Control Valve Assembly ....................................... 222
.
sition .....................................................................197
. Transmission wire ................................................ 222
.
Vehicle Cannot Be Started from D1 ......................198 .
A/T Does Not Shift: D1 D2 .................................199 . REMOVAL AND INSTALLATION ................... 224
.
A/T Does Not Shift: D2 D3 .................................200 . Removal ............................................................... 224
.
A/T Does Not Shift: D3 D4 .................................201 . Inspection After Removal ..................................... 224 .
A/T Does Not Shift: D4 D5 .................................202 . Installation ............................................................ 224
.
A/T Does Not Perform Lock-up ............................203 .
OVERHAUL ..................................................... 225
.
A/T Does Not Hold Lock-up Condition ..................203 .
Component .......................................................... 225
.
Lock-up Is Not Released ......................................204 .
Location of Needle Bearings, Bearing Races and
A/T Does Not Shift: 5th gear 4th gear, When
Thrust Washers .................................................... 231
.
Lever Switch "OFF" "ON" .................................205 .
A/T Does Not Shift: 4th gear 3rd gear, When DISASSEMBLY ............................................... 232
.
Selector Lever "D" "L" Position ........................206 . Disassembly ......................................................... 232
.
A/T Does Not Shift: 3rd gear 2nd gear, When
Lever Switch "OFF" "ON" .................................207 . REPAIR FOR COMPONENT PARTS ............. 251
.
A/T Does Not Shift: 2nd gear 1st gear, When Oil Pump, 2nd Coast Brake & 2nd Brake ............. 251 .
Release Accelerator Pedal ...................................207 . One-Way Clutch Outer Race Sub Assembly & 2nd
Vehicle Does Not Decelerate By Engine Brake ....208 . Coast Brake Hub & One-Way Clutch No.1 .......... 257 .
TCM Self-Diagnosis Does Not Activate ................209 . Transaxle Case Cover & B5 Brake ...................... 259 .
Differential Gear Assembly .................................. 265
.
A/T SHIFT LOCK SYSTEM ............................ 211
.
Description ............................................................211
. ASSEMBLY ..................................................... 268
.
Shift Lock System Electrical Parts Location .........211 . Assembly (1) ........................................................ 268
.
Wiring Diagram - AT - SHIFT ................................212 . Adjustment ........................................................... 275
.
Diagnosis Procedure ............................................212 . Assembly (2) ........................................................ 276
.
SHIFT CONTROL SYSTEM ........................... 215
. SERVICE DATA AND SPECIFICATIONS
Removal and Installation ......................................215
. (SDS) ............................................................... 292
.
General Specification ........................................... 292 .
KEY INTERLOCK CABLE .............................. 217
. Shift Schedule ...................................................... 292
.
Component ...........................................................217
. Stall Speed ........................................................... 293
.
Removal ...............................................................217
. Line Pressure ....................................................... 293
.
Installation ............................................................218
. Time Lag .............................................................. 293
.
ON-VEHICLE SERVICE ................................. 219
. Shift Solenoid Valves ........................................... 293 .
Revolution Sensor Replacement ..........................219 . Solenoid Valves ................................................... 294.
Turbine Revolution Sensor Replacement .............219 . Clutch, Gear and Brakes ...................................... 294 .
Final Drive ............................................................ 296
.
Park/Neutral Position (PNP) Switch Adjustment ...219 .
A/T Fluid Temperature Sensor ............................. 297 .
ATF Cooler ...........................................................220
.
ATF Cooler Valve .................................................220 . Turbine Revolution Sensor .................................. 297 .
Revolution Sensor ................................................ 297 .
Control Cable Adjustment .....................................221 .
Side cover .............................................................222
.
Revision: August 2007 AT-4 2008 Quest
INDEX FOR DTC
< SERVICE INFORMATION >
SERVICE INFORMATION A
INDEX FOR DTC
Alphabetical Index INFOID:0000000001717837
B
NOTE:
If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to
AT-77. AT
DTC
OBD-II Except OBD-II D
Items
Reference page
(CONSULT-III screen terms) CONSULT-III CONSULT-III
only "TRANSMIS-
GST*1 SION" E
A/T 1ST GR FNCTN P0731 P0731 AT-108
A/T 2ND GR FNCTN P0732 P0732 AT-111
F
A/T 3RD GR FNCTN P0733 P0733 AT-116
A/T 4TH GR FNCTN P0734 P0734 AT-120
A/T 5TH GR FNCTN P0735 P0735 AT-123 G
A/T TCC S/V FNCTN P0744 P0744 AT-127
ATF TEMP SEN/CIRC P0710 P0710 AT-88
CAN COMM CIRCUIT U1000 U1000 AT-77
H
ELEC TH CONTROL -- P1726 AT-192
ENG SPD INP PERFOR -- P0726 AT-106
I
FLUID TEMP SEN P0711 P0711 AT-93
GEAR LEVER SWITCH -- P0825 AT-184
PC SOL A(L/PRESS) P0745 P0745 AT-130 J
PC SOL B(SFT/PRS) P0775 P0775 AT-165
PC SOL C(TCC&SFT) P0795 P0795 AT-174
K
PC SOL C STC ON P0797 P0797 AT-179
PNP SW/CIRC P0705 P0705 AT-83
SHIFT P0780 P0780 AT-170 L
SHIFT SOL A P0750 P0750 AT-135
SHIFT SOL B P0755 P0755 AT-140
M
SHIFT SOL C P0760 P0760 AT-145
SHIFT SOL D P0765 P0765 AT-155
SHIFT SOL E P0770 P0770 AT-160 N
SFT SOL C STUCK ON P0762 P0762 AT-150
TCM POWER INPT SIG P0882 P0882 AT-188
TCM PROCESSOR -- P0613 AT-82
O
TURBINE SENSOR P0717 P0717 AT-98
VEH SPD SE/CIR-MTR -- P0500 AT-80
P
VHCL SPEED SEN-A/T P0722 P0722 AT-102
*1: These numbers are prescribed by SAE J2012.
DTC No. Index INFOID:0000000001717838
NOTE:
Revision: August 2007 AT-5 2008 Quest
INDEX FOR DTC
< SERVICE INFORMATION >
If DTC U1000 is displayed with other DTCs, first perform the trouble diagnosis for DTC U1000. Refer to
AT-77.
DTC
OBD-II Except OBD-II
Items
Reference page
CONSULT-III CONSULT-III (CONSULT-III screen terms)
only "TRANSMIS-
GST*1 SION"
-- P0500 VEH SPD SE/CIR-MTR AT-80
-- P0613 TCM PROCESSOR AT-82
P0705 P0705 PNP SW/CIRC AT-83
P0710 P0710 ATF TEMP SEN/CIRC AT-88
P0711 P0711 FLUID TEMP SEN AT-93
P0717 P0717 TURBINE SENSOR AT-98
P0722 P0722 VHCL SPEED SEN-A/T AT-102
-- P0726 ENG SPD INP PERFOR AT-106
P0731 P0731 A/T 1ST GR FNCTN AT-108
P0732 P0732 A/T 2ND GR FNCTN AT-111
P0733 P0733 A/T 3RD GR FNCTN AT-116
P0734 P0734 A/T 4TH GR FNCTN AT-120
P0735 P0735 A/T 5TH GR FNCTN AT-123
P0744 P0744 A/T TCC S/V FNCTN AT-127
P0745 P0745 PC SOL A(L/PRESS) AT-130
P0750 P0750 SHIFT SOL A AT-135
P0755 P0755 SHIFT SOL B AT-140
P0760 P0760 SHIFT SOL C AT-145
P0762 P0762 SFT SOL C STUCK ON AT-150
P0765 P0765 SHIFT SOL D AT-155
P0770 P0770 SHIFT SOL E AT-160
P0775 P0775 PC SOL B(SFT/PRS) AT-165
P0780 P0780 SHIFT AT-170
P0795 P0795 PC SOL C(TCC&SFT) AT-174
P0797 P0797 PC SOL C STC ON AT-179
-- P0825 GEAR LEVER SWITCH AT-184
P0882 P0882 TCM POWER INPT SIG AT-188
-- P1726 ELEC TH CONTROL AT-192
U1000 U1000 CAN COMM CIRCUIT AT-77
*1: These numbers are prescribed by SAE J2012.
Revision: August 2007 AT-6 2008 Quest
PRECAUTIONS
< SERVICE INFORMATION >
PRECAUTIONS
A
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000001717839
B
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS AT
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual. D
WARNING:
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