Nissan Murano. Instruction — part 1371
TM-26
< SYSTEM DESCRIPTION >
[CVT: RE0F09B]
LOCK-UP AND SELECT CONTROL SYSTEM
LOCK-UP AND SELECT CONTROL SYSTEM
System Diagram
INFOID:0000000009719407
System Description
INFOID:0000000009719408
• 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
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
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
Instruction valve
TCC solenoid valve
Lock-up select solenoid valve
Primary speed sensor
Secondary speed sensor
CVT fluid temperature sensor
Transmission range switch
Forward clutch
TM-16, "Component Description"
Reverse brake
Torque converter
Name
Function
TCM
TM-20, "Component Description"
Accelerator pedal position sensor
SHIFT CONTROL SYSTEM
TM-29
< SYSTEM DESCRIPTION >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
SHIFT CONTROL SYSTEM
System Diagram
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NOTE:
The gear ratio is set for each position separately.
System Description
INFOID:0000000009719412
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
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