2009 NISSAN LATIO Service Repair Manual

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Page 1145 of 4331

NISSAN LATIO 2009 Service Repair Manual CVT SYSTEM
CVT-201
< SERVICE INFORMATION >
[RE0F08B] D
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CVT SYSTEM
Cross-Sectional View - RE0F08B INFOID:0000000004305573
1. Converter housing 2. Oil pump 3. Forward clu

Page 1146 of 4331

NISSAN LATIO 2009 Service Repair Manual B

Page 1147 of 4331

NISSAN LATIO 2009 Service Repair Manual CVT SYSTEM
CVT-203
< SERVICE INFORMATION >
[RE0F08B] D
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Hydraulic Control System
INFOID:0000000004305575
TCM Function INFOID:0000000004305576
The function of the TCM is

Page 1148 of 4331

NISSAN LATIO 2009 Service Repair Manual " System Description " .
Input/Output Signal of TCM INFOID:0000000004305578 B

Page 1149 of 4331

NISSAN LATIO 2009 Service Repair Manual CVT SYSTEM
CVT-205
< SERVICE INFORMATION >
[RE0F08B] D
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*1: Input by CAN communications.
*2: Output by CAN communications.
*3: If these input and output signals are diff

CVT SYSTEM
CVT-205
< SERVICE INFORMATION >
[RE0F08B] D
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G H
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M A
B CVT
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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 Control INFOID:0000000004305579
• 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 PNP switch signal, the lock-up signal, the voltage, the target gear ratio, the
fluid temperature, 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 Control INFOID:0000000004305580
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-
put 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
O/D OFF indicator signal (*2)
X X
Control item
Fluid
pressure
control Select con-
trol Shift control
Lock-up
control CAN com-
munication
control Fail-safe
function
(*3) SCIA1846E

Page 1150 of 4331

NISSAN LATIO 2009 Service Repair Manual CVT-206< 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 an

Page 1151 of 4331

NISSAN LATIO 2009 Service Repair Manual CVT SYSTEM
CVT-207
< SERVICE INFORMATION >
[RE0F08B] D
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Lock-up and Se
lect Control INFOID:0000000004305581
• The torque converter clutch piston in the torque

Page 1152 of 4331

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