2011 NISSAN TIIDA Service Repair Manual

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Page 1073 of 3787

NISSAN TIIDA 2011 Service Repair Manual CVT-18
< SERVICE INFORMATION >[RE0F08B]
CVT FLUID
b. If one or more pieces of debris are found that are over 1 mm
(0.040 in) in size and/or peeled clutch facing material is found in
the coffee filter,

Page 1074 of 3787

NISSAN TIIDA 2011 Service Repair Manual CVT SYSTEMCVT-19
< SERVICE INFORMATION > [RE0F08B]
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CVT SYSTEM
Cross-Sectional View - RE0F08BINFOID:0000000005928733
1. Converter housing 2. Oil pump3. Forward clutch

Page 1075 of 3787

NISSAN TIIDA 2011 Service Repair Manual CVT-20
< SERVICE INFORMATION >[RE0F08B]
CVT SYSTEM
Control System
INFOID:0000000005928734
AWDIA0767GB
Revision: May 2010 2011 Versa

Page 1076 of 3787

NISSAN TIIDA 2011 Service Repair Manual CVT SYSTEMCVT-21
< SERVICE INFORMATION > [RE0F08B]
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Hydraulic Control SystemINFOID:0000000005928735
TCM FunctionINFOID:0000000005928736
The function of the TCM is to:

Page 1077 of 3787

NISSAN TIIDA 2011 Service Repair Manual CVT-22
< SERVICE INFORMATION >[RE0F08B]
CVT SYSTEM
CONTROL SYSTEM DIAGRAM
CAN CommunicationINFOID:0000000005928737
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for

Page 1078 of 3787

NISSAN TIIDA 2011 Service Repair Manual CVT SYSTEMCVT-23
< SERVICE INFORMATION > [RE0F08B]
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*1: Input by CAN communications.
*2: Output by CAN communications.
*3: If these input and output signals are differ

CVT SYSTEMCVT-23
< SERVICE INFORMATION > [RE0F08B]
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*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.
Line Pressure and Secondary Pressure ControlINFOID:0000000005928739
• When an input torque signal equivalent to the engine drive force is sent from the ECM to the TCM, the TCM
controls the line pressure solenoid valve and secondary pressure solenoid valve.
• This line pressure solenoid controls the pressure regulat or valve as the signal pressure and adjusts the pres-
sure of the operating oil discharged from the oil pump to the line pressure most appropriate to the driving
state. Secondary pressure is cont rolled by decreasing line pressure.
NORMAL CONTROL
Optimize the line pressure and secondary pressure, dependi ng 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 temperat ure, and the fluid pressure.
FEEDBACK CONTROL
When controlling the normal fluid pressure or the sele cted fluid pressure, the secondary pressure can be set
more accurately by using the fluid pressure sensor to detect the secondary pressure and controlling the feed-
back.
Shift ControlINFOID:0000000005928740
In order to select the gear ratio which can obtain the dr iving 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 and
selects the optimum gear ratio, and determines the gear change steps to the gear ratio. Then send the com-
Out-
putSte p mo tor
XX
TCC solenoid valve XXX
Lock-up select solenoid valve XXX
Line pressure solenoid valve XXX X
Secondary pressure solenoid valve XX X
O/D OFF indicator signal
(*2)XX
Control item
Fluid
pressure
control Select con-
trol Shift control
Lock-up
control CAN com-
munication
control Fail-safe
function
(*3)
SCIA1846E
Revision: May 2010 2011 Versa

Page 1079 of 3787

NISSAN TIIDA 2011 Service Repair Manual CVT-24
< SERVICE INFORMATION >[RE0F08B]
CVT SYSTEM
mand to the step motor, and control the flow-in/flow-out of line pressure from the primary pulley to determine
the position of the moving-pulley and

Page 1080 of 3787

NISSAN TIIDA 2011 Service Repair Manual CVT SYSTEMCVT-25
< SERVICE INFORMATION > [RE0F08B]
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Lock-up and Select ControlINFOID:0000000005928741
• The torque converter clutch piston in the torque conv erter i

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