Page 1 of 3051
Release:April 2001 01)GENERALINFORMATIONGIMAINTENANCEMAENGINEMECHANICALEMENGINELUBRICATION&
COOLINGSYSTEMSLCENGINECONTROLSYSTEMECACCELERATORCONTROL,
FUEL&EXHAUSTSYSTEMSFECLUTCHCLMANUALTRANSAXLEMTAUTOMATICTRANSAXLEATFRONT&REARAXLEAXFRONT&REARSUSPENSIONSUBRAKESYSTEMBRSTEERINGSYSTEMSTRESTRAINTSYSTEMRSBODY&TRIMBTHEATER&AIRCONDITIONERHASTARTING&CHARGINGSYSTEMSSCELECTRICALSYSTEMELALPHABETICALINDEXIDXALMERATINOMODELV10SERIESQUICKREFERENCEINDEX
Page 2 of 3051
AUTOMATIC TRANSAXLE
SECTION
AT
CONTENTS
EURO-OBD
TROUBLE DIAGNOSIS - INDEX....................................4
Alphabetical & P No. Index for DTC ...........................4
PRECAUTIONS...............................................................6
Precautions for Supplemental Restraint System
(SRS)²AIR BAG²and²SEAT BELT
PRE-TENSIONER²......................................................6
Precautions for On Board Diagnostic (EURO-
OBD) System of CVT and Engine...............................6
Precautions ..................................................................6
Service Notice or Precautions .....................................7
Wiring Diagrams and Trouble Diagnoses....................8
PREPARATION...............................................................9
Special Service Tools ..................................................9
CVT FLUID.....................................................................10
Checking CVT Fluid...................................................10
Changing CVT Fluid .................................................. 11
OVERALL SYSTEM......................................................12
CVT Electrical Parts Location....................................12
Circuit Diagram ..........................................................13
Cross-sectional View - RE0F06A ..............................14
Control System ..........................................................15
EURO-OBD
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...............................................................18
Introduction ................................................................18
EURO-OBD Function for CVT System......................18
EURO-OBD Diagnostic Trouble Code (DTC)............18
Malfunction Indicator (MI) ..........................................21
CONSULT-II ...............................................................21
EXCEPT FOR EURO-OBD
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...............................................................31CONSULT-II ...............................................................31
Diagnostic Procedure Without CONSULT-II ..............35
EURO-OBD
TROUBLE DIAGNOSIS - INTRODUCTION..................41
Introduction ................................................................41
Work Flow ..................................................................44
EXCEPT FOR EURO-OBD
TROUBLE DIAGNOSIS - INTRODUCTION..................46
Introduction ................................................................46
Work Flow ..................................................................49
TROUBLE DIAGNOSIS - BASIC INSPECTION...........51
CVT Fluid Check .......................................................51
Stall Test ....................................................................51
Line Pressure Test .....................................................52
Road Test...................................................................53
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION...............................................................58
TCM Terminals and Reference Value........................58
TROUBLE DIAGNOSIS FOR POWER SUPPLY..........62
Wiring Diagram - AT - MAIN ......................................62
TCM Terminals and Reference Value........................64
Diagnostic Procedure ................................................65
EURO-OBD
DTC P0705 PARK/NEUTRAL POSITION (PNP)
SWITCH.........................................................................66
Description .................................................................66
Wiring Diagram - AT - PNP/SW.................................68
Diagnostic Procedure ................................................70
Component Inspection ...............................................72
DTC P0710 CVT FLUID TEMPERATURE SENSOR
CIRCUIT.........................................................................73
Description .................................................................73
Page 3 of 3051
Wiring Diagram - AT - FTS ........................................75
Diagnostic Procedure ................................................77
DTC P0715 PRIMARY SPEED SENSOR.....................79
Description .................................................................79
Wiring Diagram - AT - PSSA/T ..................................80
Diagnostic Procedure ................................................82
Component Inspection ...............................................83
DTC P0720 VEHICLE SPEED SENSOR
(SECONDARY SPEED SENSOR)................................84
Description .................................................................84
Wiring Diagram - AT - VSSA/T ..................................86
Diagnostic Procedure ................................................88
Component Inspection ...............................................89
DTC P0725 ENGINE SPEED SIGNAL.........................90
Description .................................................................90
Wiring Diagram - AT - ENGSS ..................................91
Diagnostic Procedure ................................................92
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE........................................................94
Description .................................................................94
Wiring Diagram - AT - TCV........................................96
Diagnostic Procedure ................................................97
Component Inspection ...............................................98
DTC P0745 LINE PRESSURE SOLENOID VALVE.....99
Description .................................................................99
Wiring Diagram - AT - LPSV....................................101
Diagnostic Procedure ..............................................102
Component Inspection .............................................103
DTC P1705 THROTTLE POSITION SENSOR...........104
Description ...............................................................104
Wiring Diagram - AT - TPS ......................................106
Diagnostic Procedure ..............................................108
Component Inspection ............................................. 111
DTC P1777 STEP MOTOR - CIRCUIT....................... 112
Description ............................................................... 112
Wiring Diagram - AT - STM ..................................... 114
Diagnostic Procedure .............................................. 115
Component Inspection ............................................. 116
DTC P1778 STEP MOTOR - FUNCTION................... 117
Description ............................................................... 117
Diagnostic Procedure .............................................. 118
DTC P1791 LINE PRESSURE SENSOR.................... 119
Description ............................................................... 119
Wiring Diagram - AT - LPS ......................................121
Diagnostic Procedure ..............................................123
Component Inspection .............................................124
CVT SAFE FUNCTION................................................125
Description ...............................................................125
Diagnostic Procedure ..............................................125EXCEPT FOR EURO-OBD
VEHICLE SPEED SENSOR CVT (SECONDARY
SPEED SENSOR)........................................................126
Description ...............................................................126
Wiring Diagram - AT - VSSA/T ................................128
Diagnostic Procedure ..............................................130
PRIMARY SPEED SENSOR.......................................132
Description ...............................................................132
Wiring Diagram - AT - VSSMTR ..............................134
Diagnostic Procedure ..............................................136
THROTTLE POSITION SENSOR................................137
Description ...............................................................137
Wiring Diagram - AT - TPS ......................................139
Diagnostic Procedure ..............................................141
Component Inspection .............................................145
STEPPING MOTOR - CIRCUIT...................................146
Description ...............................................................146
Wiring Diagram - AT - STM .....................................147
Diagnostic Procedure ..............................................148
Component Inspection .............................................149
STEP MOTOR - FUNCTION.......................................150
Description ...............................................................150
Diagnostic Procedure ..............................................150
LINE PRESSURE SENSOR........................................151
Description ...............................................................151
Wiring Diagram - AT - LPS ......................................153
Diagnostic Procedure ..............................................155
Component Inspection .............................................156
LINE PRESSURE SOLENOID VALVE.......................157
Description ...............................................................157
Wiring Diagram - AT - LPSV....................................159
Diagnostic Procedure ..............................................160
Component Inspection .............................................163
TORQUE CONVERTER CLUTCH SOLENOID
VALVE..........................................................................164
Description ...............................................................164
Wiring Diagram - AT - TCV......................................166
Diagnostic Procedure ..............................................167
Component Inspection .............................................169
CVT FLUID TEMPERATURE SENSOR CIRCUIT......170
Description ...............................................................170
Wiring Diagram - AT - FTS ......................................172
Diagnostic Procedure ..............................................174
ENGINE SPEED SIGNAL............................................176
Description ...............................................................176
Wiring Diagram - AT - ENGSS ................................177
Diagnostic Procedure ..............................................178
CONTROL UNIT (RAM), CONTROL UNIT (ROM).....180
Description ...............................................................180
Diagnostic Procedure ..............................................181
CONTENTS(Cont'd)
AT-2
Page 4 of 3051
CONTROL UNIT (EEPROM).......................................182
Description ...............................................................182
Diagnostic Procedure ..............................................183
TROUBLE DIAGNOSES FOR NON-DETECTABLE
ITEMS...........................................................................184
PNP Switch, Stop Lamp Switch and Throttle
Position Switch ........................................................184
Diagnostic Procedure ..............................................184
Wiring Diagram - AT - NONDTC .............................188
TROUBLE DIAGNOSES FOR SYMPTOMS...............192
SPORT Indicator Lamp Does Not Come On ..........192
A/T SHIFT LOCK SYSTEM.........................................195
Description ...............................................................195
Shift Lock System Electrical Parts Location............195
Wiring Diagram - SHIFT -........................................196
Diagnostic Procedure ..............................................198
KEY INTERLOCK CABLE..........................................202
Components.............................................................202
Removal ...................................................................202
Installation ................................................................203ON-VEHICLE SERVICE..............................................204
Control Cable Adjustment ........................................204
Park/Neutral Position (PNP) Switch Adjustment .....204
Differential Side Oil Seal Replacement ...................204
REMOVAL AND INSTALLATION...............................206
Removal ...................................................................206
Inspection.................................................................206
Installation ................................................................207
Air Breather Hose ....................................................208
CVT Fluid Cooler .....................................................208
Components.............................................................209
SERVICE DATA AND SPECIFICATIONS (SDS).......210
General Specifications .............................................210
Stall Revolution ........................................................210
Line Pressure...........................................................210
Removal and Installation .........................................210
A/T Fluid Temperature Sensor.................................210
Solenoid Valves .......................................................210
Dropping Resistor ....................................................210
CONTENTS(Cont'd)
AT-3
Page 5 of 3051
Alphabetical & P No. Index for DTCNLAT0001ALPHABETICAL INDEX FOR DTCNLAT0001S01Check if the vehicle is a model with Euro-OBD system or not by the
ªType approval numberº on the identification plate. Refer to GI
section, ªIDENTIFICATION PLATEº.
Type approval number Model
Available With Euro-OBD system
Not available (blank) Without Euro-OBD system
Items
(CONSULT-II screen terms)DTC
Reference page
ECM*1CONSULT-II
GST*2
ATF TEMP SEN/CIRC 0710 P0710 AT-73
ENG SPEED SIG 0725 P0725 AT-90
LINE PRESSURE SEN 1791 P1791 AT-119
L/PRESS SOL/CIRC 0745 P0745 AT-99
PNP SW/CIRC 0705 P0705 AT-66
PRI SPEED SIG/CIRC 0715 P0715 AT-79
STEP MOTOR/CIRC 1777 P1777 AT-112
STEP MOTOR/FNCTN 1778 P1778 AT-117
TP SEN/CIRC A/T*3 1705 P1705 AT-104
TCC SOLENOID/CIRC 0740 P0740 AT-94
VEH SPD SEN/CIR A/T 0720 P0720 AT-84
*1: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*2: These numbers are prescribed by ISO15031-6.
*3: When the fail-safe operation occurs, the MI illuminates.
TROUBLE DIAGNOSIS Ð INDEXEURO-OBD
Alphabetical & P No. Index for DTC
AT-4
Page 6 of 3051
P NO. INDEX FOR DTC=NLAT0001S02Check if the vehicle is a model with Euro-OBD system or not by the
ªType approval numberº on the identification plate. Refer to GI
section, ªIDENTIFICATION PLATEº.
Type approval number Model
Available With Euro-OBD system
Not available (blank) Without Euro-OBD system
DTC
Items
(CONSULT-II screen terms)Reference page
CONSULT-II
GST*2ECM*1
P0705 0705 PNP SW/CIRC AT-66
P0710 0710 ATF TEMP SEN/CIRC AT-73
P0715 0715 PRI SPEED SIG/CIRC AT-79
P0720 0720 VEH SPD SEN/CIR AT AT-84
P0725 0725 ENG SPEED SIG AT-90
P0740 0740 TCC SOLENOID/CIRC AT-94
P0745 0745 L/PRESS SOL/CIRC AT-99
P1705 1705 TP SEN/CIRC A/T*3 AT-104
P1777 1777 STEP MOTOR/CIRC AT-112
P1778 1778 STEP MOTOR/FNCTN AT-117
P1791 1791 LINE PRESSURE SEN AT-119
*1: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*2: These numbers are prescribed by ISO15031-6.
*3: When the fail-safe operation occurs, the MI illuminates.
TROUBLE DIAGNOSIS Ð INDEXEURO-OBD
Alphabetical & P No. Index for DTC (Cont'd)
AT-5
Page 7 of 3051
Precautions for Supplemental Restraint System
(SRS) ªAIR BAGº and ªSEAT BELT
PRE-TENSIONERº
NLAT0002The Supplemental Restraint System ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº, used along with a seat
belt, help to reduce the risk or severity of injury to the driver and front passenger in a frontal collision. The
Supplemental Restraint System consists of air bag modules (located in the center of the steering wheel and
on the instrument panel on the passenger side), seat belt pre-tensioners, a diagnosis sensor unit, warning
lamp, wiring harness and spiral cable.
In addition to the supplemental air bag modules for a frontal collision, the supplemental side air bag used along
with the seat belt helps to reduce the risk or severity of injury to the driver and front passenger in a side col-
lision. The supplemental side air bag consists of air bag modules (located in the outer side of front seats),
satellite sensor, diagnosis sensor unit (one of components of supplemental air bags for a frontal collision),
wiring harness, warning lamp (one of components of supplemental air bags for a frontal collision). Information
necessary to service the system safely is included in theRS sectionof this Service Manual.
WARNING:
+To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be performed
by an authorized NISSAN dealer.
+Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
+Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified with yellow harness connector (and with
yellow harness protector or yellow insulation tape before the harness connectors).
Precautions for On Board Diagnostic (EURO-
OBD) System of CVT and Engine
NLAT0198The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MI) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
+Be sure to turn the ignition switch ªOFFº and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc.
will cause the MI to light up.
+Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MI to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
+Be sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. may cause the MI to light up due to a short circuit.
+Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MI to light up due to a malfunction of the EGR system or fuel injection system, etc.
+Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
SEF289H
PrecautionsNLAT0003+Before connecting or disconnecting the TCM harness
connector, turn ignition switch OFF and disconnect nega-
tive battery terminal. Failure to do so may damage the
TCM. Because battery voltage is applied to TCM even if
ignition switch is turned off.
PRECAUTIONS
Precautions for Supplemental Restraint System (SRS) ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº
AT-6
Page 8 of 3051
AAT470A
+When connecting or disconnecting pin connectors into or
from TCM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on TCM
pin terminal, when connecting pin connectors.
MEF040DA
+Before replacing TCM, perform TCM input/output signal
inspection and make sure whether TCM functions prop-
erly or not. (See page AT-58.)
SAT652J
+After performing each TROUBLE DIAGNOSIS, perform
ªDTC (Diagnostic Trouble Code) CONFIRMATION PROCE-
DUREº.
The DTC should not be displayed in the ªDTC CONFIRMA-
TION PROCEDUREº if the repair is completed.
+It is very important to perform functional tests whenever they
are indicated.
+Extreme care should be taken to avoid damage to O-rings,
seals and gaskets when assembling.
+When the CVT drain plug is removed, only some of the fluid is
drained. Old CVT fluid will remain in torque converter and CVT
fluid cooling system.
Always follow the procedures under ªChanging CVT Fluidº in
the MA section when changing CVT fluid.
Service Notice or PrecautionsNLAT0004FAIL-SAFENLAT0004S01The TCM has an electronic Fail-Safe (limp home mode). This allows the vehicle to be driven even if a major
electrical input/output device circuit is damaged.
Under Fail-Safe, the vehicle always runs even with a shift lever position of ªLº or ªDº. The customer may com-
plain of sluggish or poor acceleration.
When the ignition key is turned ªONº following Fail-Safe operation, SPORT indicator lamp blinks for about 8
seconds. [For ªTCM SELF-DIAGNOSTIC PROCEDURE (No Tools)º, refer to AT-28.]
The blinking of the SPORT indicator lamp for about 8 seconds will appear only once and be cleared. The cus-
tomer may resume normal driving conditions.
Always follow the ªWORK FLOWº (Refer to AT-44).
PRECAUTIONS
Precautions (Cont'd)
AT-7