Nissan Pathfinder. Manual - part 1144

SYSTEM

TM-35

< SYSTEM DESCRIPTION >

[CVT: RE0F10E]

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REVERSE PROHIBIT CONTROL

LINE PRESSURE CONTROL
LINE PRESSURE CONTROL : System Description

INFOID:0000000009177510

SYSTEM DIAGRAM

DESCRIPTION

Highly accurate line pressure control (secondary pressure control) reduces friction for improvement of fuel

economy. 

Normal Oil Pressure Control

Appropriate line pressure and secondary pressure suitable for driving condition are determined based on the

accelerator pedal position, engine speed, primary pulley (input) speed, secondary pulley (output) speed, vehi-

cle speed, input torque, stop lamp switch signal, transmission range switch signal, lock-up signal, power volt-

age, target shift ratio, oil temperature, oil pressure, and overdrive control switch signal.

Secondary Pressure Feedback Control

Vehicle behavior in 
control 

Power performance may be lowered, compared to normal control.

Normal return condi-
tion

The control returns to the normal control when CVT fluid temperature is lowered.

Control

The reverse brake is controlled to avoid becoming engaged when the selector lever is set in “R” position while 
driving in forward direction at more than the specified speed.

Vehicle behavior in 
control 

If the selector lever is put at “R” position when driving with the forward gear, the gear becomes neutral, not 
reverse. 

Normal return condi-
tion

The control returns to normal control when the vehicle is driven at low speeds. (The reverse brake becomes 
engaged.)

JSDIA4006GB

TM-36

< SYSTEM DESCRIPTION >

[CVT: RE0F10E]

SYSTEM

In normal oil pressure control and oil pressure control in shifting, highly accurate secondary pressure is deter-

mined by detecting the secondary pressure using an oil pressure sensor and by feedback control. 

SHIFT CONTROL
SHIFT CONTROL : System Description

INFOID:0000000009177511

SYSTEM DIAGRAM

DESCRIPTION

To select the gear ratio that can give the driving force to meet driver's intent or vehicle situation, the vehicle

driving condition such as vehicle speed or accelerator pedal position is detected and the most appropriate

gear ratio is selected and the shifting method before reaching the speed is determined. The information is out-

JSDIA4009GB

SYSTEM

TM-37

< SYSTEM DESCRIPTION >

[CVT: RE0F10E]

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put to the primary pressure solenoid valve and secondary pressure solenoid valve to control the line pressure

input/output to the pulley, to determine the pulley (movable pulley) position and to control the gear position. 

Shift Position Function

• D Position (Normal)

Gear shifting is performed in all shifting ranges from the lowest to

the highest gear ratio. 

• D Position (OD OFF)

The gear ratio is generally high by limiting the shifting range on the

high side, and this always generates a large driving power. 

• L Position

By limiting the shifting range only to the lowest of the gear ratio, a

large driving force and engine brake are obtained. 

Hill Climbing And Descending Control

If a downhill is detected with the accelerator pedal is released, the system performs downshift to increase the

engine brake force so that vehicle may not be accelerated more than necessary. If a climbing hill is detected,

the system improves the acceleration performance in re-acceleration by limiting the gear shift range on the

high side. 

NOTE:

For engine brake control on a downhill, the control can be stopped with CONSULT. 

SCIA1953E

SCIA8229E

SCIA8240E

JSDIA2060GB

TM-38

< SYSTEM DESCRIPTION >

[CVT: RE0F10E]

SYSTEM

Control In Acceleration

From change of the vehicle speed or accelerator pedal position, the acceleration request level of the driver or

driving scene is evaluated. In start or acceleration during driving, the gear shift characteristics with linearity of

revolution increase and vehicle speed increase are gained to improve the acceleration feel.

Tow Mode 

• In tow mode, sluggish acceleration and insufficient engine brake output resulting from towing are assisted

and improved by CVT gear shifting.

• When all of the following conditions are satisfied, CVT goes into tow mode.

- Tow mode switch is ON

- When CVT judges a towing condition from vehicle behavior.

Tow Mode Function

SELECT CONTROL
SELECT CONTROL : System Description

INFOID:0000000009177512

SYSTEM DIAGRAM

DESCRIPTION

Based on accelerator pedal angle, engine speed, primary pulley speed, and the input speed, the optimum

operating pressure is set to reduce impact of a selector lever operation while shifting from “N” (“P”) to “D” (“R”)

position.

LOCK-UP CONTROL

Situation

Operation

Road condition

Brake pedal operation

Flat road

Depressed

To assist deceleration resulting from brake operation, the tow mode function increas-
es engine revolution by shifting down and makes the engine brake effective.

Uphill

—

In tow mode, the shift range on the HIGH side is limited more than that of normal mode 
and uphill driving control is improved.

Downhill

Depressed

To assist deceleration resulting from brake operation, the tow mode function increas-
es engine revolution by shifting down more than the time when driving on flat roads 
and makes the engine brake effective.

JSDIA3711GB