1999 NISSAN PRIMERA transmission

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

CVT Fluid CheckNCAT0025FLUID LEAKAGE CHECKNCAT0025S011. Clean area suspected of leaking. Ð for example, mating sur-
face of converter housing and transmission case.
2. Start engine, apply foot brake, place selector lever in ªDº posi-
tion and wait a few minutes.
3. Stop engine.
4. Check for fluid leakage.
FLUID CONDITION CHECKNCAT0025S02
Fluid color Suspected problem
Dark or black with burned odor Wear of frictional material
Milky pink Water contamination Ð Road water
entering through filler tube or breather
Varnished fluid, light to dark brown and
tackyOxidation Ð Over or under filling, Ð
Overheating
FLUID LEVEL CHECKNCAT0025S03Refer to MA section (ªChecking CVT Fluidº, ªCHASSIS AND BODY
MAINTENANCEº).
Stall TestNCAT0026STALL TEST PROCEDURENCAT0026S011. Check CVT fluid and engine oil levels. If necessary, add.
2. Drive vehicle for approx. 10 minutes or until engine oil and CVT
fluid reach operating temperature.
CVT fluid operating temperature:
50 - 80ÉC (122 - 176ÉF)
SAT767B
SAT288G Fluid leakage
SAT638A
SAT647B
TROUBLE DIAGNOSIS Ð BASIC INSPECTION
CVT Fluid Check
AT-34

Wiring Diagram Ð CVT Ð MAINNCAT0031
YAT201
BATTERY
ENGINE
CONTROL
MODULE
RELAY
OFFONSTOP
LAMP
SWITCH
FUSE
BLOCK
(J/B)OFFONSTOP
LAMP
SWITCH: Detectable line for DTC
: Non-detectable line for DTC
: LHD models
: RHD models Refer to EL-POWER. FUSE
BLOCK
(J/B)
TCM
(TRANSMISSION
CONTROL
MODULE)
Refer to last page
(foldout page). ECM
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Wiring Diagram Ð CVT Ð MAIN
AT-45

DescriptionNCAT0032IThe PNP switch assembly includes a transmission range
switch.
IThe transmission range switch detects the selector lever posi-
tion and sends a signal to the TCM.
TCM TERMINALS AND REFERENCE VALUENCAT0032S01Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement
standard
27 L/ORPNP switch ªLº
position
When setting selector lever to ªLº
position.Battery voltage
When setting selector lever to
other positions.Approx. 0V
34 LGPNP switch ªDº
positionWhen setting selector lever to ªDº
position.Battery voltage
When setting selector lever to
other positions.Approx. 0V
35 G/WPNP switch ªRº
positionWhen setting selector lever to ªRº
position.Battery voltage
When setting selector lever to
other positions.Approx. 0V
36 G/RPNP switch ªNº or
ªPº positionWhen setting selector lever to ªNº
or ªPº position.Battery voltage
When setting selector lever to
other positions.Approx. 0V
ON BOARD DIAGNOSIS LOGICNCAT0032S02
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
: PNP SW/CIRC
TCM does not receive the correct voltage
signal from the switch based on the gear
position.IHarness or connectors
(The PNP switch circuit is open or
shorted.)
IPNP switch
: P0705
: MI Code No. 0705
DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH
Description
AT-48

Wiring Diagram Ð AT Ð FTSNCAT0200
YAT203
CONTROL VALVE
(CVT FLUID
TEMPERATURE
SENSOR)
: Detectable line for DTC
: Non-detectable line for DTC
TCM
(TRANSMISSION
CONTROL MODULE)ECM
DTC P0710 CVT FLUID TEMPERATURE SENSOR CIRCUIT
Wiring Diagram Ð AT Ð FTS
AT-56

Wiring Diagram Ð AT Ð VSSA/TNCAT0221
YAT204
PRIMARY
SPEED
SENSOR
: Detectable line for DTC
: Non-detectable line for DTC
TCM
(TRANSMISSION
CONTROL MODULE)ECM
DTC P0715 PRIMARY SPEED SENSOR
Wiring Diagram Ð AT Ð VSSA/T
AT-60

Wiring Diagram Ð AT Ð VSSA/TNCAT0201
YAT205
SECONDARY
SPEED
SENSOR
: Detectable line for DTC
: Non-detectable line for DTC
TCM
(TRANSMISSION
CONTROL
MODULE)ECM
DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR)
Wiring Diagram Ð AT Ð VSSA/T
AT-64

Wiring Diagram Ð AT Ð ENGSSNCAT0202
YAT206
ECM
: Detectable line for DTC
: Non-detectable line for DTC
TCM
(TRANSMISSION
CONTROL MODULE)
DTC P0725 ENGINE SPEED SIGNAL
Wiring Diagram Ð AT Ð ENGSS
AT-67