Nissan Teana J32. Manual - part 1124

TM-20

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

HYDRAULIC CONTROL SYSTEM

HYDRAULIC CONTROL SYSTEM

System Diagram

INFOID:0000000003848924

System Description

INFOID:0000000003848925

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.

JPDIA0589GB

SCIA1846E

HYDRAULIC CONTROL SYSTEM

TM-21

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

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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 Location

INFOID:0000000003848926

*1: Primary pressure sensor is included in CVT assembly.

*2: Control valve assembly is included in CVT assembly.

NOTE:
The following components are included in control valve assembly (7).
• PNP  switch

1.

Sport mode switch

2.

Shift position indicator

3.

SPORT indicator lamp

4.

TCM

5.

Secondary speed sensor

6.

Primary pressure sensor

*1

7.

Control valve assembly

*2

8.

CVT unit connector

9.

Accelerator pedal position sensor

A.

Control device

B.

Combination meter

C.

Engine room LH

D.

CVT assembly

E.

Accelerator pedal, upper

JPDIA0747ZZ

TM-22

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

HYDRAULIC CONTROL SYSTEM

• Primary speed sensor
• Step motor
• Secondary pressure solenoid valve
• Line pressure solenoid valve
• Torque converter clutch solenoid valve
• Shift control valve
• Secondary valve
• Manual valve
• Lock-up select solenoid valve
• CVT fluid temperature sensor
• Secondary pressure sensor
• ROM  assembly

Component Description

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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 valve

Controls 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 valve

Transmits 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 valve

The select switch valve enables to select engagement/disengagement of lock-up clutch 
and that of forward clutch and reverse clutch.

TCC solenoid valve

TM-62

Secondary pressure solenoid valve

TM-72

Line pressure solenoid valve

TM-66

Step motor

TM-97

Lock-up select solenoid valve

TM-94

Primary speed sensor

TM-52

Secondary speed sensor

TM-55

PNP switch

TM-47

Primary pulley

TM-19

Secondary pulley

Forward clutch

Torque converter

Name

Function

TCM

Judges driving condition according to signals from each sensor, and optimally controls 
variable speed mechanism.

Accelerator pedal position sensor

TM-88

CONTROL SYSTEM

TM-23

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

CONTROL SYSTEM

System Diagram

INFOID:0000000003848928

System Description

INFOID:0000000003848929

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

JPDIA0809GB

SENSORS (or SIGNAL)

⇒

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
Primary pressure sensor
Secondary pressure sensor

Shift 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 diagnosis

Step motor 
Torque converter clutch solenoid 
valve
Lock-up select solenoid valve
Line pressure solenoid valve
Secondary pressure solenoid valve
SPORT indicator lamp
Shift position indicator
Stater relay