Nissan Cube. Manual - part 956

TM-80

< SYSTEM DESCRIPTION >

[CVT: RE0F08B]

HYDRAULIC CONTROL SYSTEM

HYDRAULIC CONTROL SYSTEM

System Diagram

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System Description

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Hydraulic control mechanism consists of trochoid type oil pump directly driven by the engine, hydraulic control
valve controlling line pressure and gear shifting, and input signals. 

LINE PRESSURE AND SECONDARY PRESSURE CONTROL

When an input torque signal corresponding to engine driving force is transmitted from ECM to TCM, TCM con-
trols line pressure solenoid valve and secondary pressure solenoid valve to adjust to a correct oil pressure.

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 transmission range 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.

JSDIA1354GB

HYDRAULIC CONTROL SYSTEM

TM-81

< SYSTEM DESCRIPTION >

[CVT: RE0F08B]

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Component Parts Location

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NOTE:

The following components are included in control valve assembly.

• CVT fluid temperature sensor

• Torque converter clutch solenoid valve

• Lock-up select solenoid valve

• Line pressure solenoid valve

1.

Shift position indicator
(On the combination meter)

2.

OD OFF indicator lamp
(On the combination meter)

3.

Crankshaft position sensor

4.

ECM
Refer to 

EC-36, 

"Component Parts Location"

5.

IPDM E/R
Refer to 

PCS-5, "Component Parts 

Location"

 (With intelligent Key sys-

tem), 

PCS-36, "Component Parts 

Location"

 (Without intelligent Key 

system)

6.

BCM
Refer to 

BCS-10, "Component Parts 

Location"

 (With intelligent Key sys-

tem), 

BCS-95, "Component Parts 

Location"

 (Without intelligent Key 

system)

7.

Overdrive control switch

8.

Secondary speed sensor

9.

Transmission range switch

10. Control valve assembly

*

11.

CVT unit connector

12. Primary speed sensor

13. Stop lamp switch

14. Accelerator pedal position sensor

15. TCM

A.

Center console

B.

Transaxle assembly

C.

Accelerator pedal, upper

D.

Brake pedal, left side

JSDIA1310GB

TM-82

< SYSTEM DESCRIPTION >

[CVT: RE0F08B]

HYDRAULIC CONTROL SYSTEM

• Secondary pressure solenoid valve

• Secondary pressure sensor

• Step motor

• ROM  assembly

*: Control valve assembly is included in transaxle assembly.

Component Description

INFOID:0000000009948921

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-123, "Description"

Secondary pressure solenoid valve

TM-135, "Description"

Line pressure solenoid valve

TM-129, "Description"

Step motor

TM-157, "Description"

Lock-up select solenoid valve

TM-154, "Description"

Primary speed sensor

TM-116, "Description"

Secondary speed sensor

TM-119, "Description"

Transmission range switch

TM-109, "Description"

Primary pulley

TM-78, "Component Description"

Secondary pulley

Forward clutch

Torque converter

TCM

Judges the vehicle driving status according to the signal from each sensor and controls 
the non-step transmission mechanism properly.

Accelerator pedal position sensor

TM-147, "Description"

CONTROL SYSTEM

TM-83

< SYSTEM DESCRIPTION >

[CVT: RE0F08B]

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CONTROL SYSTEM

System Diagram

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System Description

INFOID:0000000009948923

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

JSDIA1285GB

SENSORS (or SIGNALS)

⇒

TCM

⇒

ACTUATORS

Transmission range switch
CVT fluid temperature sensor
Secondary pressure sensor
Primary speed sensor
Secondary speed sensor
Engine speed signal
Accelerator pedal position signal
Closed throttle position signal
Stop lamp switch signal
Overdrive control switch signal
Vehicle speed signal

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 communication line
Duet-EA control
CAN system
On board diagnosis

Line pressure solenoid valve
Secondary pressure solenoid 
valve
Torque converter clutch solenoid 
valve
Lock-up select solenoid valve
Step motor 
Shift position indicator
OD OFF indicator lamp