Nissan Murano Z51. Manual — part 1417

HYDRAULIC CONTROL SYSTEM

TM-19

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

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, "Description"

Secondary pressure solenoid valve

TM-72, "Description"

Line pressure solenoid valve

TM-66, "Description"

Step motor

TM-96, "Description"

Lock-up select solenoid valve

TM-93, "Description"

Primary speed sensor

TM-52, "Description"

Secondary speed sensor

TM-55, "Description"

Transmission range switch

TM-46, "Description"

Primary pulley

TM-14, "Component Description"

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-87, "Description"

TM-20

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

CONTROL SYSTEM

CONTROL SYSTEM

System Diagram

INFOID:0000000005513944

System Description

INFOID:0000000005513945

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

JSDIA1370GB

SENSORS (or SIGNAL)

⇒

TCM

⇒

ACTUATORS

Transmission range switch
Accelerator pedal position signal
Closed throttle position signal
Engine speed signal
CVT fluid temperature sensor
Vehicle speed signal
Overdrive control 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
OD OFF indicator lamp
Shift position indicator
Starter relay

CONTROL SYSTEM

TM-21

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

• *1: Input by CAN communications.

• *2: Output by CAN communications.

• *3: If these input and output signals are different, the TCM triggers the fail-safe function.

Control item

Fluid

pressure

control

Select con-

trol

Shift con-

trol

Lock-up

control

CAN com-

munica-

tion control

Fail-safe

function

*3

Input

Transmission range switch

X

X

X

X

X

X

Accelerator pedal position signal

*1

X

X

X

X

X

X

Closed throttle position signal

*1

X

X

X

X

Engine speed signal

*1

X

X

X

X

X

CVT fluid temperature sensor

X

X

X

X

X

Overdrive control switch signal

*1

X

X

X

X

Stop lamp switch signal

*1

X

X

X

X

Primary speed sensor

X

X

X

X

X

Secondary speed sensor

X

X

X

X

X

X

Primary pressure sensor

X

X

Secondary pressure sensor

X

X

X

TCM power supply voltage signal

X

X

X

X

X

X

Output

Step motor

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

OD OFF indicator signal

*2

X

X

TM-22

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

CONTROL SYSTEM

Component Parts Location

INFOID:0000000005513946

Component Description

INFOID:0000000005513947

TRANSAXLE ASSEMBLY

JSDIA1368GB