1999 NISSAN PRIMERA sensor

AUTOMATIC TRANSAXLE
SECTION
AT(H×CVT)
CONTENTS
TROUBLE DIAGNOSIS - INDEX....................................3
Alphabetical & P No. Index for DTC ...........................3
PRECAUTIONS...............................................................5
Precautions for Supplemental Restraint System
(SRS)²AIR BAG²and²SEAT BELT
PRE-TENSIONER²......................................................5
Precautions for On Board Diagnostic (OBD)
System of CVT and Engine .........................................5
Precautions ..................................................................5
Service Notice or Precautions .....................................6
Wiring Diagrams and Trouble Diagnosis .....................7
PREPARATION...............................................................8
Special Service Tools ..................................................8
OVERALL SYSTEM........................................................9
CVT Electrical Parts Location......................................9
Circuit Diagram ..........................................................10
Cross-sectional View - RE0F06A .............................. 11
Control System ..........................................................12
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION...............................................................15
Introduction ................................................................15
OBD Function for CVT System .................................15
OBD Diagnostic Trouble Code (DTC) .......................15
Malfunction Indicator (MI) ..........................................18
CONSULT-II ...............................................................18
TROUBLE DIAGNOSIS - INTRODUCTION..................29
Introduction ................................................................29
Work Flow ..................................................................32
TROUBLE DIAGNOSIS - BASIC INSPECTION...........34
CVT Fluid Check .......................................................34
Stall Test ....................................................................34
Line Pressure Test .....................................................35
Road Test...................................................................36
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION...............................................................41
TCM Terminals and Reference Value........................41TROUBLE DIAGNOSIS FOR POWER SUPPLY..........45
Wiring Diagram - CVT - MAIN...................................45
DTC P0705 PARK/NEUTRAL POSITION (PNP)
SWITCH.........................................................................48
Description .................................................................48
Wiring Diagram - AT - PNP/SW.................................50
Diagnostic Procedure ................................................51
Component Inspection ...............................................53
DTC P0710 CVT FLUID TEMPERATURE SENSOR
CIRCUIT.........................................................................54
Description .................................................................54
Wiring Diagram - AT - FTS ........................................56
Diagnostic Procedure ................................................57
DTC P0715 PRIMARY SPEED SENSOR.....................59
Description .................................................................59
Wiring Diagram - AT - VSSA/T ..................................60
Diagnostic Procedure ................................................61
Component Inspection ...............................................61
DTC P0720 VEHICLE SPEED SENSOR CVT
(SECONDARY SPEED SENSOR)................................62
Description .................................................................62
Wiring Diagram - AT - VSSA/T ..................................64
Diagnostic Procedure ................................................65
Component Inspection ...............................................65
DTC P0725 ENGINE SPEED SIGNAL.........................66
Description .................................................................66
Wiring Diagram - AT - ENGSS ..................................67
Diagnostic Procedure ................................................68
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE........................................................69
Description .................................................................69
Wiring Diagram - AT - TCV........................................71
Diagnostic Procedure ................................................72
Component Inspection ...............................................73
DTC P0745 LINE PRESSURE SOLENOID VALVE.....74
Description .................................................................74
AT

Wiring Diagram - AT - LPSV......................................76
Diagnostic Procedure ................................................77
Component Inspection ...............................................78
DTC P1705 THROTTLE POSITION SENSOR.............79
Description .................................................................79
Wiring Diagram - AT - TPS ........................................81
Diagnostic Procedure ................................................82
Component Inspection ...............................................85
DTC P1777 STEP MOTOR - CIRCUIT.........................86
Description .................................................................86
Wiring Diagram - AT - STM .......................................88
Diagnostic Procedure ................................................89
Component Inspection ...............................................90
DTC P1778 STEP MOTOR - FUNCTION.....................91
Description .................................................................91
Diagnostic Procedure ................................................93
DTC P1791 CVT FLUID PRESSURE SENSOR...........94
Description .................................................................94
Wiring Diagram - AT - FPS ........................................96
Diagnostic Procedure ................................................97
Component Inspection ...............................................98
CVT SAFE FUNCTION..................................................99
Description .................................................................99
Diagnostic Procedure ..............................................100
CONTROL UNIT (RAM), CONTROL UNIT (ROM).....101
Description ...............................................................101Diagnostic Procedure ..............................................102
CONTROL UNIT (EEPROM).......................................103
Description ...............................................................103
Diagnostic Procedure ..............................................104
TROUBLE DIAGNOSES FOR NON-DETECTABLE
ITEMS...........................................................................105
PNP Switch, Stop Lamp Switch and Throttle
Position Switch ........................................................105
Wiring Diagram - AT - NONDTC ............................. 110
ON-VEHICLE SERVICE.............................................. 114
Control Cable Adjustment ........................................ 114
Park/Neutral Position (PNP) Switch Adjustment ..... 114
Differential Side Oil Seal Replacement ................... 114
REMOVAL AND INSTALLATION............................... 116
Removal ................................................................... 116
Inspection................................................................. 116
Installation ................................................................ 117
Air Breather Hose .................................................... 118
CVT Fluid Cooler (Hyper CVT-M6) ......................... 118
Components............................................................. 119
SERVICE DATA AND SPECIFICATIONS (SDS).......120
General Specifications .............................................120
Stall Revolution ........................................................120
Line Pressure...........................................................120
Removal and Installation .........................................120
CONTENTS(Cont'd)
AT-2

Precautions for Supplemental Restraint System
(SRS) ªAIR BAGº and ªSEAT BELT
PRE-TENSIONERº
NCAT0002The 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:
ITo 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.
IImproper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system.
IDo not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses (except ªSEAT BELT PRE-TENSIONERº connector) 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 (OBD)
System of CVT and Engine
NCAT0198The ECM has an on board diagnostic system. It will light up the malfunction indicator (MI) to warn the driver
of a malfunction causing emission deterioration.
CAUTION:
IBe 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.
IBe 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.)
IBe 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.
IBe 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.
IBe sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
PrecautionsNCAT0003IBefore 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.
SEF289H
PRECAUTIONS
Precautions for Supplemental Restraint System (SRS) ªAIR BAGº and ªSEAT BELT PRE-TENSIONERº
AT-5

The blinking of the CVT or SPORT indicator lamp for about 8 seconds will appear only once and be cleared.
The customer may resume normal driving conditions.
Always follow the ªWORK FLOWº (Refer to AT-32).
The SELF-DIAGNOSIS results will be as follows:
The first SELF-DIAGNOSIS will indicate damage to the vehicle speed sensor or the revolution sensor.
During the next SELF-DIAGNOSIS, performed after checking the sensor, no damages will be indicated.
OBD SELF-DIAGNOSISNCAT0004S04ICVT self-diagnosis is performed by the TCM in combination with the ECM. The results can be read through
the blinking pattern of the CVT or SPORT indicator. Refer to the table on AT-19 for the indicator used to
display each self-diagnostic result.
IThe self-diagnostic results indicated by the MI are automatically stored in both the ECM and TCM memo-
ries.
Always perform the procedure ªHOW TO ERASE DTCº on AT-16 to complete the repair and avoid
unnecessary blinking of the MI.
For details of OBD, refer to EC section (ªON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONº).
ICertain systems and components, especially those related to OBD, may use a new style slide-
locking type harness connector.
For description and how to disconnect, refer to EL section, ªDescriptionº, ªHARNESS CONNEC-
TORº.
Wiring Diagrams and Trouble DiagnosisNCAT0005When you read wiring diagrams, refer to the followings:
IªHOW TO READ WIRING DIAGRAMSº in GI section
IªPOWER SUPPLY ROUTINGº for power distribution circuit in EL section
When you perform trouble diagnosis, refer to the followings:
IªHOW TO FOLLOW TEST GROUP IN TROUBLE DIAGNOSISº in GI section
IªHOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENTº in GI section
PRECAUTIONS
Service Notice or Precautions (Cont'd)
AT-7

CVT Electrical Parts LocationNCAT0008
SAT671J Front
TCMIndicator C/USteering column
Throttle position sensor and
throttle position switch
SPORT indicator lamp
CVT indicator lamp
Manual mode switch SPORT mode switch
Dropping
resistor
Primary speed sensor Fluid temperature sensor
Fluid pressure sensor
Lock-up solenoid
Line pressure solenoid
Step motorInside control valveControl valve connectorPNP switchSecondary speed sensor
OVERALL SYSTEM
CVT Electrical Parts Location
AT-9

Control System=NCAT0014OUTLINENCAT0014S01The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift
position and reduces shifting and lock-up shocks.
SENSORS
ETCM
EACTUATORS
PNP switch
Throttle position sensor
Closed throttle position switch
Wide open throttle position switch
Engine speed signal
CVT fluid temperature sensor
CVT fluid pressure sensor
Primary speed sensor
Secondary speed sensor
Stop lamp switch
Sport mode switch (Hyper CVT
only)
Indicator control unit (Hyper CVT
M6 only)
ABS control unitShift control
Line pressure control
Lock-up control
Fail-safe control
Self-diagnosis
CONSULT-II communication line
control
Duet-EU control
On board diagnosisStep motor
CVT indicator (warning) lamp
(Hyper CVT M6 only)
Torque converter clutch
solenoid valve
Line pressure solenoid valve
SPORT indicator lamp (Hyper
CVT only)
OVERALL SYSTEM
Control System
AT-12

CONTROL SYSTEMNCAT0014S02
NAT310 WheelDifferential
gearFinal gearBelt and
PulleyForward and
reverse
changeTorque
converterEngine Transaxle
Oil pump
Oil pressure control Parking
system
Control device
Sport mode SW or
manual mode SWElectrical control
Control valve
Primary pulley
speed and
secondary pulley
speed sensor
CVT indicator
(warning) lamp or
SPORT indicator lamp [Hyper CVT-M6]
Position
indicator
Indicator C/U
TCM
Mechanical system
Oil system
Electrical system
Stop lamp SWABS C/UECMThrottle
opening
sensor Engine speed sensor
PNP switch
OVERALL SYSTEM
Control System (Cont'd)
AT-13

TCM FUNCTION=NCAT0014S03The function of the TCM is to:
IReceive input signals sent from various switches and sensors.
IDetermine required line pressure, shifting point and lock-up operation.
ISend required output signals to the step motor and the respective solenoids.
INPUT/OUTPUT SIGNAL OF TCMNCAT0014S04
Sensors and actuators Function
InputPNP switch Detects select lever position and sends a signal to TCM.
Throttle position sensor Detects throttle valve position and sends a signal to TCM.
Closed throttle position switch Detects throttle valve's fully-closed position and sends a signal to TCM.
Wide open throttle position switchDetects a throttle valve position of greater than 1/2 of full throttle and
sends a signal to TCM.
Engine speed signal From ECM.
CVT fluid temperature sensor Detects transmission fluid temperature and sends a signal to TCM.
CVT fluid pressure sensor Detects transmission fluid pressure and sends a signal to TCM.
Primary speed sensor Detects primary pulley rpm and sends a signal to TCM.
Secondary speed sensor Detects secondary pulley rpm and sends a signal to TCM.
Stop lamp switchSends a signal to the TCM relaying the operation condition of the brake
pedal.
Sport mode switchSends a signal to the TCM relaying the operation condition of the sport
mode switch.
Indicator control unit*1Sends a signal to the TCM operation condition of the manual mode switch
in control device.
ABS control unit Sends a signal to the TCM operation condition of the ABS.
OutputStep motor Regulates pulley position in relation to a signal sent from TCM.
Line pressure solenoid valveRegulates (or decreases) line pressure suited to driving conditions in rela-
tion to a signal sent from TCM.
Torque converter clutch solenoid
valveRegulates (or decreases) lock-up pressure suited to driving conditions in
relation to a signal sent from TCM.
CVT indicator (warning) lamp*2 Shows TCM faults, when CVT control components malfunction.
SPORT indicator lamp*3 Shows the operation condition of the SPORT mode switch. *3
Indicator control unit *1Receives the information of gear position on manual mode from TCM, and
sends a signal to indicator.
*1: Hyper CVT M6 models only
*2: Hyper CVT M6 models
*3: Hyper CVT models
OVERALL SYSTEM
Control System (Cont'd)
AT-14