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TRANSMISSION/TRANSAXLE
A
SECTION CVT CVT
B
CVT
D
E
CONTENTS
SERVICE INFORMATION ........................... 5
. OBD-II Function for CVT System ...........................24
. F
One or Two Trip Detection Logic of OBD-II ............24.
INDEX FOR DTC ................................................ 5
. OBD-II Diagnostic Trouble Code (DTC) .................24.
Alphabetical Index .................................................... 5
. Malfunction Indicator Lamp (MIL) ...........................25
. G
DTC No. Index ......................................................... 5
.
TROUBLE DIAGNOSIS .................................... 27
PRECAUTIONS .................................................. 7
. DTC Inspection Priority Chart .................................27 .
Precaution for Supplemental Restraint System Fail-Safe .................................................................27
. H
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- How to Perform Trouble Diagnosis for Quick and
SIONER" .................................................................. 7
. Accurate Repair ......................................................28
.
Precaution for On Board Diagnosis (OBD) System CVT Electrical Parts Location .................................33 . I
of CVT and Engine ................................................... 7 . Circuit Diagram .......................................................34
.
Precaution for TCM and CVT Assembly Replace- Inspections before Trouble Diagnosis ....................34 .
ment ......................................................................... 7
. Road Test ...............................................................38
. J
Removal and Installation Procedure for CVT Unit Check before Engine Is Started ..............................38 .
Connector ................................................................. 8
. Check at Idle ...........................................................39
.
Precaution ................................................................ 9
. Cruise Test .............................................................40
.
Service Notice or Precaution .................................. 10 . Vehicle Speed When Shifting Gears ......................41 . K
TCM Input/Output Signal Reference Value ............41 .
PREPARATION .................................................11
. CONSULT-III Function (TRANSMISSION) .............44 .
Special Service Tool .............................................. 11
. Diagnosis Procedure without CONSULT-III ...........52 . L
Commercial Service Tool ....................................... 11
.
DTC U1000 CAN COMMUNICATION LINE ..... 53
CVT FLUID ........................................................12
. Description ..............................................................53
.
Checking CVT Fluid ............................................... 12
. M
On Board Diagnosis Logic ......................................53 .
Changing CVT Fluid ............................................... 13
. Possible Cause .......................................................53
.
CVT Fluid Cooler Cleaning .................................... 13
. DTC Confirmation Procedure .................................53 .
Wiring Diagram - CVT - CAN ..................................54 . N
CVT SYSTEM ....................................................16
.
Diagnosis Procedure ..............................................55 .
Cross-Sectional View - RE0F09B .......................... 16 .
Control System ....................................................... 17
. DTC P0615 START SIGNAL CIRCUIT ............. 56
Hydraulic Control System ....................................... 18 . O
Description ..............................................................56
.
TCM Function ......................................................... 18
. CONSULT-III Reference Value in Data Monitor
CAN Communication .............................................. 19 . Mode .......................................................................56
.
Input/Output Signal of TCM .................................... 20 . On Board Diagnosis Logic ......................................56 . P
Line Pressure and Secondary Pressure Control .... 20 Possible Cause .......................................................56.
Shift Control ........................................................... 21
. DTC Confirmation Procedure .................................56 .
Lock-up and Select Control .................................... 22 . Wiring Diagram - CVT - STSIG ..............................57 .
Control Valve .......................................................... 23
. Diagnosis Procedure ..............................................58 .
ON BOARD DIAGNOSTIC (OBD) SYSTEM .....24
. DTC P0703 STOP LAMP SWITCH CIRCUIT ... 60
Introduction ............................................................ 24
.
Revision: July 2007 CVT-1 2008 Maxima
Description ............................................................. 60
. DTC Confirmation Procedure ................................. 82.
CONSULT-III Reference Value in Data Monitor Diagnosis Procedure .............................................. 82
.
Mode ...................................................................... 60
.
On Board Diagnosis Logic ..................................... 60 . DTC P0730 BELT DAMAGE ............................ 84
.
Possible Cause ...................................................... 60. Description ............................................................. 84
.
DTC Confirmation Procedure ................................ 60 . CONSULT-III Reference Value in Data Monitor
Diagnosis Procedure ............................................. 60 . Mode ...................................................................... 84
.
On Board Diagnosis Logic ..................................... 84 .
DTC P0705 PARK/NEUTRAL POSITION Possible Cause ...................................................... 84.
SWITCH ............................................................ 62
. DTC Confirmation Procedure ................................. 84 .
Description ............................................................. 62
. Diagnosis Procedure .............................................. 84 .
CONSULT-III Reference Value in Data Monitor
Mode ...................................................................... 62
. DTC P0740 TORQUE CONVERTER CLUTCH
On Board Diagnosis Logic ..................................... 62 . SOLENOID VALVE .......................................... 85
.
Possible Cause ...................................................... 62. Description ............................................................. 85
.
DTC Confirmation Procedure ................................ 62 . CONSULT-III Reference Value in Data Monitor
Wiring Diagram - CVT - PNP/SW .......................... 64 . Mode ...................................................................... 85
.
Diagnosis Procedure ............................................. 65 . On Board Diagnosis Logic ..................................... 85 .
Component Inspection ........................................... 67 . Possible Cause ...................................................... 85.
DTC Confirmation Procedure ................................. 85 .
DTC P0710 CVT FLUID TEMPERATURE Wiring Diagram - CVT - TCV ................................. 86 .
SENSOR CIRCUIT ............................................ 68
. Diagnosis Procedure .............................................. 87 .
Description ............................................................. 68
. Component Inspection ........................................... 88 .
CONSULT-III Reference Value in Data Monitor
Mode ...................................................................... 68
. DTC P0744 A/T TCC S/V FUNCTION (LOCK-
On Board Diagnosis Logic ..................................... 68 . UP) .................................................................... 90
.
Possible Cause ...................................................... 68. Description ............................................................. 90
.
DTC Confirmation Procedure ................................ 68 . CONSULT-III Reference Value in Data Monitor
Wiring Diagram - CVT - FTS .................................. 69 . Mode ...................................................................... 90
.
Diagnosis Procedure ............................................. 70 . On Board Diagnosis Logic ..................................... 90 .
Component Inspection ........................................... 71 . Possible Cause ...................................................... 90.
DTC Confirmation Procedure ................................. 90 .
DTC P0715 INPUT SPEED SENSOR CIR- Diagnosis Procedure .............................................. 90 .
CUIT (PRI SPEED SENSOR) ........................... 73
.
Description ............................................................. 73
. DTC P0745 LINE PRESSURE SOLENOID
CONSULT-III Reference Value in Data Monitor VALVE .............................................................. 92
.
Mode ...................................................................... 73
. Description ............................................................. 92
.
On Board Diagnosis Logic ..................................... 73 . CONSULT-III Reference Value in Data Monitor
Possible Cause ...................................................... 73. Mode ...................................................................... 92
.
DTC Confirmation Procedure ................................ 73 . On Board Diagnosis Logic ..................................... 92 .
Wiring Diagram - CVT - PRSCVT .......................... 74 . Possible Cause ...................................................... 92.
Diagnosis Procedure ............................................. 75 . DTC Confirmation Procedure ................................. 92 .
Wiring Diagram - CVT - LPSV ............................... 93 .
DTC P0720 VEHICLE SPEED SENSOR CVT Diagnosis Procedure .............................................. 94 .
(SECONDARY SPEED SENSOR) .................... 77
. Component Inspection ........................................... 96 .
Description ............................................................. 77
.
CONSULT-III Reference Value in Data Monitor DTC P0746 PRESSURE CONTROL SOLE-
Mode ...................................................................... 77
. NOID A PERFORMANCE (LINE PRESSURE
On Board Diagnosis Logic ..................................... 77 . SOLENOID VALVE) ......................................... 97
.
Possible Cause ...................................................... 77. Description ............................................................. 97
.
DTC Confirmation Procedure ................................ 77 . CONSULT-III Reference Value in Data Monitor
Wiring Diagram - CVT - SESCVT .......................... 78 . Mode ...................................................................... 97
.
Diagnosis Procedure ............................................. 79 . On Board Diagnosis Logic ..................................... 97 .
Possible Cause ...................................................... 97.
DTC P0725 ENGINE SPEED SIGNAL ............. 82
. DTC Confirmation Procedure ................................. 97 .
Description ............................................................. 82
. Diagnosis Procedure .............................................. 97 .
CONSULT-III Reference Value in Data Monitor
Mode ...................................................................... 82
. DTC P0776 PRESSURE CONTROL SOLE-
On Board Diagnosis Logic ..................................... 82 . NOID B PERFORMANCE (SEC PRESSURE
Possible Cause ...................................................... 82. SOLENOID VALVE) ........................................ 100
.
Revision: July 2007 CVT-2 2008 Maxima
Description ........................................................... 100
. CONSULT-III Reference Value in Data Monitor
CONSULT-III Reference Value in Data Monitor Mode ..................................................................... 119
. A
Mode .................................................................... 100
. On Board Diagnosis Logic .................................... 119 .
On Board Diagnosis Logic ................................... 100 . Possible Cause ..................................................... 119.
Possible Cause .................................................... 100. DTC Confirmation Procedure ............................... 119 . B
DTC Confirmation Procedure ............................... 100 . Wiring Diagram - CVT - PRIPS ............................ 120 .
Diagnosis Procedure ............................................ 100 . Diagnosis Procedure ............................................ 121 .
DTC P0778 PRESSURE CONTROL SOLE- DTC P0868 SECONDARY PRESSURE CVT
NOID B ELECTRICAL (SEC PRESSURE SO- DOWN ............................................................. 124
LENOID VALVE) ............................................. 102
. Description ............................................................ 124
.
Description ........................................................... 102
. CONSULT-III Reference Value in Data Monitor D
CONSULT-III Reference Value in Data Monitor Mode ..................................................................... 124
.
Mode .................................................................... 102
. On Board Diagnosis Logic .................................... 124 .
On Board Diagnosis Logic ................................... 102 . Possible Cause ..................................................... 124.
E
Possible Cause .................................................... 102. DTC Confirmation Procedure ............................... 124 .
DTC Confirmation Procedure ............................... 102 . Diagnosis Procedure ............................................ 124 .
Wiring Diagram - CVT - SECPSV ........................ 103 .
Diagnosis Procedure ............................................ 104 . DTC P1701 TRANSMISSION CONTROL F
Component Inspection ......................................... 106 . MODULE (POWER SUPPLY) ......................... 126
Description ............................................................ 126
.
DTC P0826 MANUAL MODE SWITCH CIR- On Board Diagnosis Logic .................................... 126 . G
CUIT ................................................................. 107
. Possible Cause ..................................................... 126
.
Description ........................................................... 107
. DTC Confirmation Procedure ............................... 126 .
CONSULT-III Reference Value in Data Monitor Wiring Diagram - CVT - POWER .......................... 127 .
H
Mode .................................................................... 107
. Diagnosis Procedure ............................................ 128 .
On Board Diagnosis Logic ................................... 107 .
Possible Cause .................................................... 107. DTC P1705 THROTTLE POSITION SENSOR. 131
DTC Confirmation Procedure ............................... 107 . Description ............................................................ 131
. I
Wiring Diagram - CVT - MMSW ........................... 108 . CONSULT-III Reference Value in Data Monitor
Diagnosis Procedure ............................................ 109 . Mode ..................................................................... 131
.
Component Inspection ......................................... 110 . On Board Diagnosis Logic .................................... 131 . J
Possible Cause ..................................................... 131.
DTC P0840 TRANSMISSION FLUID PRES- DTC Confirmation Procedure ............................... 131 .
SURE SENSOR A CIRCUIT (SEC PRES- Diagnosis Procedure ............................................ 131 .
K
SURE SENSOR) .............................................. 112
.
DTC P1722 ESTM VEHICLE SPEED SIGNAL. 133
Description ........................................................... 112
.
Description ............................................................ 133
.
CONSULT-III Reference Value in Data Monitor
CONSULT-III Reference Value in Data Monitor L
Mode .................................................................... 112
.
Mode ..................................................................... 133
.
On Board Diagnosis Logic ................................... 112 .
On Board Diagnosis Logic .................................... 133 .
Possible Cause .................................................... 112.
Possible Cause ..................................................... 133.
DTC Confirmation Procedure ............................... 112 . M
DTC Confirmation Procedure ............................... 133 .
Wiring Diagram - CVT - SECPS ........................... 113 .
Diagnosis Procedure ............................................ 133 .
Diagnosis Procedure ............................................ 114 .
DTC P1723 CVT SPEED SENSOR FUNC- N
DTC P0841 PRESSURE SENSOR FUNC-
TION ................................................................ 135
TION ................................................................ 116
.
Description ............................................................ 135
.
Description ........................................................... 116
.
On Board Diagnosis Logic .................................... 135 . O
CONSULT-III Reference Value in Data Monitor
Possible Cause ..................................................... 135
.
Mode .................................................................... 116
.
DTC Confirmation Procedure ............................... 135 .
On Board Diagnosis Logic ................................... 116 .
Diagnosis Procedure ............................................ 135 .
Possible Cause .................................................... 116. P
DTC Confirmation Procedure ............................... 116 . DTC P1726 ELECTRIC THROTTLE CON-
Diagnosis Procedure ............................................ 116 . TROL SYSTEM ............................................... 137
DTC P0845 TRANSMISSION FLUID PRES- Description ............................................................ 137
.
On Board Diagnosis Logic .................................... 137 .
SURE SENSOR B CIRCUIT (PRI PRESSURE
Possible Cause ..................................................... 137
.
SENSOR) ......................................................... 119
. DTC Confirmation Procedure ............................... 137 .
Description ........................................................... 119
. Diagnosis Procedure ............................................ 137 .
Revision: July 2007 CVT-3 2008 Maxima
DTC P1740 LOCK-UP SELECT SOLENOID Engine Cannot Be Started in "P" or "N" Position . 155
VALVE CIRCUIT ............................................. 138
. In "P" Position, Vehicle Moves Forward or Back-
Description ............................................................138
. ward When Pushed .............................................. 156
.
CONSULT-III Reference Value in Data Monitor In "N" Position, Vehicle Moves ............................. 156.
Mode .....................................................................138
. Large Shock "N" "R" Position .......................... 157 .
On Board Diagnosis Logic ....................................138 . Vehicle Does Not Creep Backward in "R" Position. 157
Possible Cause .....................................................138 . Vehicle Does Not Creep Forward in "D" Position . 158
DTC Confirmation Procedure ...............................138 . CVT Does Not Shift .............................................. 159
.
Wiring Diagram - CVT - L/USSV ...........................139 . Cannot Be Changed to Manual Mode .................. 160 .
Diagnosis Procedure ............................................140 . CVT Does Not Shift in Manual Mode ................... 160 .
Component Inspection ..........................................141 . Vehicle Does Not Decelerate by Engine Brake ... 161 .
DTC P1745 LINE PRESSURE CONTROL ..... 143
. CVT SHIFT LOCK SYSTEM ............................ 163
.
Description ............................................................143
. Description ........................................................... 163
.
On Board Diagnosis Logic ....................................143 . Shift Lock System Electrical Parts Location ......... 163 .
Possible Cause .....................................................143
. Wiring Diagram - CVT - SHIFT ............................ 164 .
DTC Confirmation Procedure ...............................143 . Shift Lock Control Unit Reference Value ............. 166 .
Diagnosis Procedure ............................................143 . Component Inspection ......................................... 167 .
DTC P1777 STEP MOTOR - CIRCUIT ........... 144
. TRANSMISSION CONTROL MODULE .......... 169
.
Description ............................................................144
. Removal and Installation ...................................... 169
.
CONSULT-III Reference Value in Data Monitor
Mode .....................................................................144
.
SHIFT CONTROL SYSTEM ............................ 170
.
Removal and Installation ...................................... 170
.
On Board Diagnosis Logic ....................................144 .
Adjustment of CVT Position ................................. 172
.
Possible Cause .....................................................144 .
Checking of CVT Position .................................... 173
.
DTC Confirmation Procedure ...............................144 .
Wiring Diagram - CVT - STM ................................145 . AIR BREATHER HOSE ................................... 174
.
Diagnosis Procedure ............................................146 . Removal and Installation ...................................... 174
.
Component Inspection ..........................................147 .
DIFFERENTIAL SIDE OIL SEAL .................... 175
.
DTC P1778 STEP MOTOR - FUNCTION ....... 148
. Removal and Installation ...................................... 175
.
Description ............................................................148
.
CONSULT-III Reference Value in Data Monitor TRANSAXLE ASSEMBLY .............................. 176
.
Mode .....................................................................148
. Removal and Installation ...................................... 176
.
On Board Diagnosis Logic ....................................148 .
Possible Cause .....................................................148 . SERVICE DATA AND SPECIFICATIONS
DTC Confirmation Procedure ...............................148 . (SDS) ............................................................... 181
.
Diagnosis Procedure ............................................149 . General Specification ........................................... 181 .
Vehicle Speed When Shifting Gears .................... 181 .
SHIFT POSITION INDICATOR CIRCUIT ....... 150
. Stall Speed ........................................................... 181
.
Description ............................................................150
. Line Pressure ....................................................... 181
.
CONSULT-III Reference Value in Data Monitor Solenoid Valves ................................................... 182
.
Mode .....................................................................150
. CVT Fluid Temperature Sensor ........................... 182 .
Diagnosis Procedure ............................................150 . Primary Speed Sensor ......................................... 182 .
Secondary Speed Sensor .................................... 182 .
TROUBLE DIAGNOSIS FOR SYMPTOMS .... 151
. Removal and Installation ...................................... 182 .
Wiring Diagram - CVT - NONDTC ........................151
.
CVT Indicator Lamp Does Not Come On .............154.
Revision: July 2007 CVT-4 2008 Maxima
INDEX FOR DTC
< SERVICE INFORMATION >
SERVICE INFORMATION A
INDEX FOR DTC
Alphabetical Index INFOID:0000000001720346
B
NOTE:
If DTC "U1000 CAN COMM CIRCUIT" is displayed with other DTCs, first perform the trouble diagnosis
for "DTC U1000 CAN COMMUNICATION LINE". Refer to CVT-53. CVT
DTC
Items OBD-II Except OBD-II D
Reference page
(CONSULT-III screen terms)
CONSULT-III CONSULT-III only
GST*1 "TRANSMISSION"
A/T TCC S/V FNCTN P0744 P0744 CVT-90
E
ATF TEMP SEN/CIRC P0710 P0710 CVT-68
BELT DAMG -- P0730 CVT-84
F
BRAKE SW/CIRC -- P0703 CVT-60
CAN COMM CIRCUIT U1000 U1000 CVT-53
CVT SPD SEN/FNCTN -- P1723 CVT-135 G
ENGINE SPEED SIG -- P0725 CVT-82
ELEC TH CONTROL -- P1726 CVT-137
H
ESTM VEH SPD SIG -- P1722 CVT-133
INPUT SPD SEN/CIRC P0715 P0715 CVT-73
L/PRESS CONTROL -- P1745 CVT-143 I
L/PRESS SOL/CIRC P0745 P0745 CVT-92
LU-SLCT SOL/CIRC P1740 P1740 CVT-138
J
MANUAL MODE SWITCH -- P0826 CVT-107
PNP SW/CIRC P0705 P0705 CVT-62
PRESS SEN/FNCTN -- P0841 CVT-116 K
PRS CNT SOL/A FCTN P0746 P0746 CVT-97
PRS CNT SOL/B CIRC P0778 P0778 CVT-102
L
PRS CNT SOL/B FCTN P0776 P0776 CVT-100
SEC/PRESS DOWN -- P0868 CVT-124
STARTER RELAY/CIRC -- P0615 CVT-56 M
STEP MOTR CIRC P1777 P1777 CVT-144
STEP MOTR/FNC P1778 P1778 CVT-148
TCC SOLENOID/CIRC P0740 P0740 CVT-85 N
TCM-POWER SUPPLY -- P1701 CVT-126
TP SEN/CIRC A/T -- P1705 CVT-131
O
TR PRS SENS/A CIRC P0840 P0840 CVT-112
TR PRS SENS/B CIRC P0845 P0845 CVT-119
VEH SPD SEN/CIR AT P0720 P0720 CVT-77 P
*1: These numbers are prescribed by SAE J2012.
DTC No. Index INFOID:0000000001720347
NOTE:
If DTC "U1000 CAN COMM CIRCUIT" is displayed with other DTCs, first perform the trouble diagnosis
for "DTC U1000 CAN COMMUNICATION LINE". Refer to CVT-53.
Revision: July 2007 CVT-5 2008 Maxima
INDEX FOR DTC
< SERVICE INFORMATION >
DTC
OBD-II Except OBD-II Items
Reference page
(CONSULT-III screen terms)
CONSULT-III CONSULT-III only
GST*1 "TRANSMISSION"
-- P0615 STARTER RELAY/CIRC CVT-56
-- P0703 BRAKE SW/CIRC CVT-60
P0705 P0705 PNP SW/CIRC CVT-62
P0710 P0710 ATF TEMP SEN/CIRC CVT-68
P0715 P0715 INPUT SPD SEN/CIRC CVT-73
P0720 P0720 VEH SPD SEN/CIR AT CVT-77
-- P0725 ENGINE SPEED SIG CVT-82
-- P0730 BELT DAMG CVT-84
P0740 P0740 TCC SOLENOID/CIRC CVT-85
P0744 P0744 A/T TCC S/V FNCTN CVT-90
P0745 P0745 L/PRESS SOL/CIRC CVT-92
P0746 P0746 PRS CNT SOL/A FCTN CVT-97
P0776 P0776 PRS CNT SOL/B FCTN CVT-100
P0778 P0778 PRS CNT SOL/B CIRC CVT-102
-- P0826 MANUAL MODE SWITCH CVT-107
P0840 P0840 TR PRS SENS/A CIRC CVT-112
-- P0841 PRESS SEN/FNCTN CVT-116
P0845 P0845 TR PRS SENS/B CIRC CVT-119
-- P0868 SEC/PRESS DOWN CVT-124
-- P1701 TCM-POWER SUPPLY CVT-126
-- P1705 TP SEN/CIRC A/T CVT-131
-- P1722 ESTM VEH SPD SIG CVT-133
-- P1723 CVT SPD SEN/FNCTN CVT-135
-- P1726 ELEC TH CONTROL CVT-137
P1740 P1740 LU-SLCT SOL/CIRC CVT-138
-- P1745 L/PRESS CONTROL CVT-143
P1777 P1777 STEP MOTR CIRC CVT-144
P1778 P1778 STEP MOTR/FNC CVT-148
U1000 U1000 CAN COMM CIRCUIT CVT-53
*1: These numbers are prescribed by SAE J2012.
Revision: July 2007 CVT-6 2008 Maxima
PRECAUTIONS
< SERVICE INFORMATION >
PRECAUTIONS
A
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER" INFOID:0000000001720348
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 CVT
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 SRS and SB section of this Service Man-
ual. D
WARNING:
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