Nissan Murano. Manual - part 1371

TM-26

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

LOCK-UP AND SELECT CONTROL SYSTEM

LOCK-UP AND SELECT CONTROL SYSTEM

System Diagram

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System Description

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• The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to

increase power transmission efficiency.

• The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid

valve, which is controlled by a signal from TCM. The torque converter clutch control valve engages or
releases the torque converter clutch piston.

• When shifting between “N” (“P”) 

⇒

“D” (“R”), torque converter clutch solenoid valve controls engagement

power of forward clutch and reverse brake.

• The lock-up applied gear range was expanded by locking up the

torque converter at a lower vehicle speed than conventional CVT
models.

TORQUE CONVERTER CLUTCH AND SELECT CONTROL VALVE CONTROL 

Lock-up Released 

In the lock-up released state, the torque converter clutch control valve is set into the unlocked state by the
torque converter clutch solenoid valve and the lock-up apply pressure is drained.
In this way, the torque converter clutch piston is not coupled.

Lock-up Applied

In the lock-up applied state, the torque converter clutch control valve is set into the locked state by the torque
converter clutch solenoid valve and lock-up apply pressure is generated.
In this way, the torque converter clutch piston is pressed and coupled.

Select Control

When shifting between “N” (“P”) 

⇒

“D” (“R”), optimize the operating pressure on the basis of the throttle posi-

tion, the engine speed, and the secondary pulley (output) revolution speed to lessen the shift shock.

JSDIA1355GB

JPDIA0312GB

LOCK-UP AND SELECT CONTROL SYSTEM

TM-27

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

C

E

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TM

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Component Parts Location

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Component Description

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TRANSAXLE ASSEMBLY

JSDIA1368GB

TM-28

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

LOCK-UP AND SELECT CONTROL SYSTEM

EXCEPT TRANSAXLE ASSEMBLY

Name

Function

Torque converter regulator valve

TM-20, "Component Description"

TCC control valve

Select control valve

Select switch valve

Manual valve

TCC solenoid valve

TM-65, "Description"

Lock-up select solenoid valve

TM-98, "Description"

Primary speed sensor

TM-57, "Description"

Secondary speed sensor

TM-60, "Description"

CVT fluid temperature sensor

TM-53, "Description"

Transmission range switch

TM-50, "Description"

Forward clutch

TM-16, "Component Description"

Reverse brake

Torque converter

Name

Function

TCM

TM-20, "Component Description"

Accelerator pedal position sensor

TM-90, "Description"

SHIFT CONTROL SYSTEM

TM-29

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

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E

F

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TM

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SHIFT CONTROL SYSTEM

System Diagram

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NOTE:
The gear ratio is set for each position separately.

System Description

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In order to select the gear ratio that can obtain the driving force in accordance with driver's intention and the
vehicle condition, TCM monitors the driving conditions, such as the vehicle speed and the throttle position,
selects the optimum gear ratio, and determines the gear change steps to the gear ratio. Then TCM sends the
command to the step motor, controls the inflow/outflow of line pressure from the primary pulley to determine
the position of the moving-pulley and controls the gear ratio.

“D” POSITION

Shifting over all the ranges of gear ratios from the lowest to the high-
est.

OVERDRIVE OFF CONDITION

Use this position for improved engine braking.

“L” POSITION

JSDIA1356GB

SCIA1953E

JPDIA0685GB