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TM-184
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
MECHANICAL SYSTEM
System Diagram
INFOID:0000000003806350
System DescriptionINFOID:0000000003806351
Transmits the power from the engine to the drive wheel.
JPDIA0743GB
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MECHANICAL SYSTEM
TM-185
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
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Component Parts LocationINFOID:0000000003809651
*: Control valve assembly is included in CVT assembly.
NOTE:
The following components are included in control valve assembly (8).
CVT fluid temperature sensor
Torque converter clutch solenoid valve
Line pressure solenoid valve
Step motor
ROM assembly
Secondary pressure sensor
Secondary pressure solenoid valve
Lock-up select solenoid valve
1. Sport mode switch 2. Shift position indicator 3. SPORT indicator lamp
4. TCM 5. Secondary speed sensor 6. PNP switch
7. Primary speed sensor 8.
Control valve assembly
*9. CVT unit connector
10. Accelerator pedal position sensor
A. Center console B. Combination meter C. Engine room LH
D. CVT assembly E. Accelerator pedal, upper
JPDIA0746ZZ
Page 4659 of 5121
![NISSAN TEANA 2008 Service Manual TM-186
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
MECHANICAL SYSTEM
Component Description
INFOID:0000000003806353
Item Function
Torque converterThe torque converter is the device that increases the engine t NISSAN TEANA 2008 Service Manual TM-186
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
MECHANICAL SYSTEM
Component Description
INFOID:0000000003806353
Item Function
Torque converterThe torque converter is the device that increases the engine t](/manual-img/5/57391/w960_57391-4658.png)
TM-186
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
MECHANICAL SYSTEM
Component Description
INFOID:0000000003806353
Item Function
Torque converterThe torque converter is the device that increases the engine torque as well as the conventional
CVT and transmits it to the transaxle.
Oil pumpThe efficiency of pump discharge rate has been increased at low-rpm and optimized at high-rpm
by adopting a vane-type oil pump controlled by the engine. Discharged oil from oil pump is trans-
mitted to the control valve. It is used as the oil of primary and secondary pulley operation and the
oil of clutch operation and the lubricant for each part.
Planetary gear
Perform the transmission of drive power and the switching of forward/backward movement. Forward clutch
Reverse brake
Primary pulley It is composed of a pair of pulleys (the groove width is changed freely in the axial direction) and
the steel belt (the steel star wheels are placed continuously and the belt is guided with the mul-
tilayer steel rings on both sides). The groove width changes according to wrapping radius of steel
belt and pulley from low status to overdrive status continuously with non-step. It is controlled with
the oil pressures of primary pulley and secondary pulley. Secondary pulley
Steel belt
Output gear
Reduction gear consists of primary deceleration (output gear and idler gear in pair) and second-
ary deceleration (reduction gear and final gear in pair). Each of them uses a helical gear. Idler gear
Reduction gear
Final gear
Differential
Manual shaft
The parking rod rotates the parking pole and the parking pole engages with the parking gear
when the manual shaft is in P position. As a result the parking gear and the output axis are fixed. Parking rod
Parking pawl
Parking gear
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HYDRAULIC CONTROL SYSTEM
TM-187
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HYDRAULIC CONTROL SYSTEM
System DiagramINFOID:0000000003806354
System DescriptionINFOID:0000000003806355
The hydraulic control mechanism consists of the oil pump directly driven by the engine, the hydraulic control
valve that controls line pressure and transmission, and the input signal line.
LINE PRESSURE AND SECONDARY PRESSURE CONTROL
When an input torque signal equivalent to the engine driving force is transmitted from the ECM to the TCM,
the TCM controls the line pressure solenoid valve and secondary pressure solenoid valve.
Line pressure solenoid valve activates pressure regulator valve, and line pressure from oil pump is adjusted
for the optimum driving condition. Secondary pressure is controlled by lowering line pressure.
JPDIA0733GB
SCIA1846E
Page 4661 of 5121
![NISSAN TEANA 2008 Service Manual TM-188
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
HYDRAULIC CONTROL SYSTEM
Normal Control
Optimize the line pressure and secondary pressure, depending on driving conditions, on the basis of the throt-
tle p NISSAN TEANA 2008 Service Manual TM-188
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
HYDRAULIC CONTROL SYSTEM
Normal Control
Optimize the line pressure and secondary pressure, depending on driving conditions, on the basis of the throt-
tle p](/manual-img/5/57391/w960_57391-4660.png)
TM-188
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
HYDRAULIC CONTROL SYSTEM
Normal Control
Optimize the line pressure and secondary pressure, depending on driving conditions, on the basis of the throt-
tle position, the engine speed, the primary pulley (input) revolution speed, the secondary pulley (output) revo-
lution speed, the brake signal, the PNP switch signal, the lock-up signal, the voltage, the target gear ratio, the
fluid temperature, and the fluid pressure.
Feedback Control
For the normal fluid control and the select fluid control, secondary pressure is detected for feedback control by
using a secondary pressure sensor to set a high-precision secondary pressure.
Component Parts LocationINFOID:0000000003809652
*: Control valve assembly is included in CVT assembly.
NOTE:
The following components are included in control valve assembly (8).
CVT fluid temperature sensor
1. Sport mode switch 2. Shift position indicator 3. SPORT indicator lamp
4. TCM 5. Secondary speed sensor 6. PNP switch
7. Primary speed sensor 8.
Control valve assembly
*9. CVT unit connector
10. Accelerator pedal position sensor
A. Center console B. Combination meter C. Engine room LH
D. CVT assembly E. Accelerator pedal, upper
JPDIA0746ZZ
Page 4662 of 5121
![NISSAN TEANA 2008 Service Manual HYDRAULIC CONTROL SYSTEM
TM-189
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
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Torque converter clutch solenoid valve
Line pressure solenoid valve
Step motor
ROM assembly NISSAN TEANA 2008 Service Manual HYDRAULIC CONTROL SYSTEM
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Torque converter clutch solenoid valve
Line pressure solenoid valve
Step motor
ROM assembly](/manual-img/5/57391/w960_57391-4661.png)
HYDRAULIC CONTROL SYSTEM
TM-189
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Torque converter clutch solenoid valve
Line pressure solenoid valve
Step motor
ROM assembly
Secondary pressure sensor
Secondary pressure solenoid valve
Lock-up select solenoid valve
Component DescriptionINFOID:0000000003806357
TRANSAXLE ASSEMBLY
EXCEPT TRANSAXLE ASSEMBLY
Name Function
Torque converter regulator valve Optimizes the supply pressure for the torque converter depending on driving conditions.
Pressure regulator valve Optimizes the discharge pressure from the oil pump depending on driving conditions.
TCC control valve Activates or deactivates the lock-up.
Locks-up smoothly by opening lock-up operation excessively.
Shift control valveControls inflow/outflow of line pressure from the primary pulley depending on the stroke
difference between the stepping motor and the primary pulley.
Secondary valve Controls the line pressure from the secondary pulley depending on operating conditions.
Clutch regulator valve Adjusts the clutch operating pressure depending on operating conditions.
Manual valveTransmits the clutch operating pressure to each circuit in accordance with the selected
position.
Select control valve Engages forward clutch, reverse brake smoothly depending on select operation.
Select switch valveThe select switch valve enables to select engagement/disengagement of lock-up clutch
and that of forward clutch and reverse clutch.
TCC solenoid valveTM-230
Secondary pressure solenoid valveTM-240
Line pressure solenoid valveTM-234
Step motorTM-261
Lock-up select solenoid valveTM-258
Primary speed sensorTM-218
Secondary speed sensorTM-222
PNP switchTM-213
Primary pulley
TM-186
Secondary pulley
Forward clutch
Torque converter
Name Function
TCMJudges the vehicle driving status according to the signal from each sensor and controls
the non-step transmission mechanism properly.
Accelerator pedal position sensorTM-252
Page 4663 of 5121
![NISSAN TEANA 2008 Service Manual TM-190
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
CONTROL SYSTEM
CONTROL SYSTEM
System DiagramINFOID:0000000003806358
System DescriptionINFOID:0000000003806359
The CVT senses vehicle operating conditions th NISSAN TEANA 2008 Service Manual TM-190
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
CONTROL SYSTEM
CONTROL SYSTEM
System DiagramINFOID:0000000003806358
System DescriptionINFOID:0000000003806359
The CVT senses vehicle operating conditions th](/manual-img/5/57391/w960_57391-4662.png)
TM-190
< FUNCTION DIAGNOSIS >[CVT: RE0F10A]
CONTROL SYSTEM
CONTROL SYSTEM
System DiagramINFOID:0000000003806358
System DescriptionINFOID:0000000003806359
The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift
position and reduces shifting and lock-up shocks.
TCM FUNCTION
The function of the TCM is to:
Receive input signals sent from various switches and sensors.
Determine required line pressure, shifting point, and lock-up operation.
Send required output signals to the step motor and the respective solenoids.
INPUT/OUTPUT SIGNAL OF TCM
JPDIA0744GB
SENSORS (or SIGNALS)
⇒TCM
⇒ACTUATORS
PNP switch
Accelerator pedal position signal
Closed throttle position signal
Engine speed signal
CVT fluid temperature sensor
Vehicle speed signal
Sport mode switch signal
Stop lamp switch signal
Primary speed sensor
Secondary speed sensor
Secondary pressure sensorShift control
Line pressure control
Primary pressure control
Secondary pressure control
Lock-up control
Engine brake control
Vehicle speed control
Fail-safe control
Self-diagnosis
CONSULT-III communication
line
Duet-EA control
CAN system
On board diagnosisSte p m ot or
Torque converter clutch solenoid
valve
Lock-up select solenoid valve
Line pressure solenoid valve
Secondary pressure solenoid
valve
SPORT indicator lamp
Shift position indicator
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CONTROL SYSTEM
TM-191
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*1: Input via CAN communications.
*2: Output via CAN communications.
*3: If these input and output signals are different, the TCM triggers the fail-safe function.Control itemFluid
pressure
controlSelect con-
trolShift controlLock-up
controlCAN com-
munication
controlFail-safe
function
(*3)
InputPNP switch XXXXXX
Accelerator pedal position signal
*1XXXXXX
Closed throttle position signal
*1XXXX
Engine speed signal
*1XX XXX
CVT fluid temperature sensor X X X X X
Sport mode switch signal
*1XXXX
Stop lamp switch signal
*1XXXX
Primary speed sensor X X X X X
Secondary speed sensor X X X X X X
Secondary pressure sensor X X X
Out-
putSte p mo tor X X
TCC solenoid valve X X X
Lock-up select solenoid valve X X X
Line pressure solenoid valve X X X X
Secondary pressure solenoid valve X X X
SPORT indicator signal
*2XX