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![NISSAN LATIO 2011 Service Repair Manual CVT SYSTEMCVT-25
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Lock-up and Select ControlINFOID:0000000005928741
• The torque converter clutch piston in the torque conv erter i NISSAN LATIO 2011 Service Repair Manual CVT SYSTEMCVT-25
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• The torque converter clutch piston in the torque conv erter i](/manual-img/5/57357/w960_57357-1079.png)
CVT SYSTEMCVT-25
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• The torque converter clutch piston in the torque conv erter 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 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 and Select Control System Diagram
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 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 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 (out put) revolution speed to lessen the shift shock.
Control ValveINFOID:0000000005928742
FUNCTION OF CONTROL VALVE
SCIA1958E
AWDIA0778GB
Revision: May 2010 2011 Versa
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ON BOARD DIAGNOSTIC (OBD) SYSTEMCVT-29
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The MIL is located on the instrument panel.
1. The MIL will light up when the ignition switch is turned ON with- out the engine running. This is a bulb check.
• If the MIL does not light up, refer to DI-21, "
Schematic", or see
EC-1033, "
Wiring Diagram".
2. When the engine is start ed, the MIL should go off.
If the MIL remains on, the on board diagnostic system has
detected an engine system malfunction.
SEF217U
Revision: May 2010 2011 Versa
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TROUBLE DIAGNOSISCVT-37
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Circuit DiagramINFOID:0000000005928752
Inspections before Trouble DiagnosisINFOID:0000000005928753
CVT FLUID CHECK
Fluid Leakage and Fluid Level Check
ABDWA0419GB
Revision: May 2010 2011 Versa
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U1000 CAN COMM CIRCUITCVT-57
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Wiring Diagram - CVT - CANINFOID:0000000005928766
TCM TERMINALS AND REFERENCE VALUES
Refer to CVT-46, "TCM Terminal and Reference Value".
BCWA0668E
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P0703 BRAKE SWITCH BCVT-61
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OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
3.CHECK STOP LAMP SWITCH
Check continuity between stop lamp switch harness connector E13
terminals 1 and 2. Refer to CVT-141, "
Wiring Diagram - CVT - NON-
DTC".
Check stop lamp switch after adjusting brake pedal — refer to
BR-6
.
OK or NG
OK >> Check the following. If NG, repair or replace damaged parts. • Harness for short or open between battery and stop lamp switch.
• Harness for short or open between stop lamp switch and combination meter.
NG >> Repair or replace the stop lamp switch.
Item name ConditionDisplay value
BRAKE SW Depressed brake pedal on
Released brake pedal off
Condition
Continuity
When brake pedal is depressed Yes
When brake pedal is released No
SCIA7982E
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P0705 TRANSMISSION RANGE SWITCH A
CVT-63
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Wiring Diagram - CVT - TR/SWINFOID:0000000005928784
TCM TERMINALS AND REFERENCE VALUES
Refer to CVT-46, "TCM Terminal and Reference Value" .
ABDWA0193GB
Revision: May 2010 2011 Versa
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CVT-68
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P0710 TRANSMISSION FLUID
TEMPERATURE SENSOR A
Wiring Diagram - CVT - FTS
INFOID:0000000005928792
TCM TERMINALS AND REFERENCE VALUES
Refer to CVT-46, "TCM Terminal and Reference Value".
AADWA0018GB
Revision: May 2010 2011 Versa
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P0715 INPUT SPEED SENSOR ACVT-73
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Wiring Diagram - CVT - PRSCVTINFOID:0000000005928800
TCM TERMINALS AND REFERENCE VALUES
Refer to CVT-46, "TCM Terminal and Reference Value".
AADWA0019GB
Revision: May 2010 2011 Versa