trans NISSAN NOTE 2016 Service Repair Manual

TM-70
< SYSTEM DESCRIPTION >[CVT: RE0F11A]
STRUCTURE AND OPERATION
STRUCTURE AND OPERATION
TRANSAXLE
TRANSAXLE : Cross-Sectional ViewINFOID:0000000012431010
TRANSAXLE : Trans
axle MechanismINFOID:0000000012431011
BELT & PULLEY
1. Converter housing 2. Oil pump3. Counter drive gear
4. Control valve 5. Oil pan6. Primary pulley
7. Steel belt 8. Secondary pulley9. Planetary gear (auxiliary gearbox)
10. Side cover 11. Transaxle case12. Differential case
13. Final gear 14. Reduction gear15. Counter driven gear
16. Drive sprocket 17. Oil pump chain 18. Torque converter
19. Driven sprocket
JSDIA1777ZZ
Revision: August 2015 2016 Versa Note

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STRUCTURE AND OPERATIONTM-71
< SYSTEM DESCRIPTION > [CVT: RE0F11A]
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Mechanism
It is composed of a pair of pulleys (the groove width is changed freely in the axial direction) and the steel belt
(the steel plates are placed conti
nuously and the belt is guided with the multilayer steel rings on both sides).
The groove width changes according to wrapping radius of steel belt and pulley from low status to overdrive
status continuously with non-step. It is controlled with the oil pressures of primary pulley and secondary pulley.
Steel belt
It is composed of multiple steel plates (A) and two steel rings (B)
stacked to a several number. The feature of this steel belt transmits
power with compression of the steel plate in contrast with transmis-
sion of power in pulling with a rubber belt. Friction force is required
with the pulley slope to transmit power from the steel plate. The force
is generated with the following mechanism:
Oil pressure applies to the secondary pulley to nip the plate. ⇒The
plate is pushed and extended outward. ⇒The steel ring shows with-
stands. ⇒Pulling force is generated on the steel ring. ⇒ The plate of
the primary pulley is nipped between the pulley. ⇒Friction force is
generated between the steel belt and the pulley.
Therefore, responsibilities are divided by the steel plate that trans-
mits the power with compression and the steel ring that main tains necessary friction force. In this way, the
tension of the steel ring is distributed on the entire su rface and stress variation is limited, resulting in good
durability.
Pulley
The primary pulley (input shaft side) and the secondary pulley (output shaft side) have the shaft with slope
(fixed cone surface), movable sheave (movable cone surface that can move in the axial direction) and oil pres-
sure chamber at the back of the movable sheave.
Pulley gear shifting operation
• Pulley gear shifting operation The movable sheave slides on the shaft to change the groove width of the pulley. Input signals of engine
load (accelerator pedal opening), engine revolution and gear ratio (vehicle speed) change the operation
pressures of the primary pulley and the secondary pulle y, and controls the pulley groove width. Along with
change of the pulley groove width, the belt contact radi us is changed. This allows continuous and stepless
JSDIA1966ZZ
JSDIA1779GB
Revision: August 2015 2016 Versa Note

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TM-72
< SYSTEM DESCRIPTION >[CVT: RE0F11A]
STRUCTURE AND OPERATION
gear shifting from low to overdrive.
“The contact radius ratio of each pulley in contact with the belt x auxiliary
gearbox gear ratio” is the gear ratio.
AUXILIARY GEARBOX MECHANISM
1st, 2nd and reverse gears are changed with the planetary gear mechanism.
TRANSAXLE : Operation StatusINFOID:0000000012431012
× : Engaged or applied.
JSDIA2573GB
Slector le-
ver posi- tion Parking
mecha- nism Counter
gear set Low brake High clutch Reverse
brake Primary
pulley Secondary
pulley Steel belt Reduction
gear set
P ×× ×××
R × ×××××
N × ×××
D ×× (1GR) × (2GR) ××××
L ×× (1GR) × (2GR) ××××
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STRUCTURE AND OPERATIONTM-73
< SYSTEM DESCRIPTION > [CVT: RE0F11A]
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TRANSAXLE : Oil Pressure System INFOID:0000000012431013
Oil pressure required for operation of the transaxle transmission mechanism is generated by oil pump, oil
pressure control valve, solenoid valve, etc.
TRANSAXLE : Component DescriptionINFOID:0000000012431014
JSDIA1826GB
Part name Function
Torque converter It is composed of the cover converter, turbine assembly, stator, pump impeller assem-
bly, etc. It increases the engine torque and transmits the power to the transaxle.
Oil pump Through the oil pump drive chain, it uses the vane oil pump driven by the engine. It gen-
erates necessary oil pressure to circulate fluid and to operate the clutch and brake.
Counter gear set The power from the torque converter is transmitted to the primary pulley through the
counter drive gear and the counter driven gear.
Belt & pulley (Continuously variable transmis-
sion) It is composed of the primary pulley, secondary pulley, steel belt, etc. and the mecha-
nism performs shifting, changes the gear ratio and transmits the power with oil pressure
from the control valve.
Auxiliary gearbox (stepped transmission) It is composed of the planetary gear, multi-disc clutch, multi-disc brake, etc. and the
mechanism performs shifting (1-2 gear shifting and reverse) with oil pressure from the
control valve.
Reduction gear set Conveys power from the transmission mechanism to the reduction gear and the final
gear.
Parking mechanism When the shift lever is changed to P position, the mechanism fixes the parking gear (in-
tegrated with the reduction gear) and the fixes the output shaft.
Control valve Controls oil pressure from the oil pump to the pressure suitable for the line pressure
control system, shift control system, lock-up control system and lubrication system.
Pressure regu lator valve Adjusts the discharge pressure from the oil pump to the optimum pressure (line pres-
sure) corresponding to the driving condition.
Torque converter regulator valve Adjusts the feed pressure to the torque converter to the optimum pressure correspond-
ing to the driving condition.
Pilot valve Adjusts line pressure and produces a constant pressure (pilot pressure) necessary for
activating each solenoid valve.
Revision: August 2015
2016 Versa Note

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TM-74
< SYSTEM DESCRIPTION >[CVT: RE0F11A]
STRUCTURE AND OPERATION
FLUID COOLER & FL
UID WARMER SYSTEM
FLUID COOLER & FLUID WARMER SYSTEM : System DescriptionINFOID:0000000012431015
CVT FLUID COOLER SCHEMATIC
COMPONENT DESCRIPTION
CVT Oil Warmer
• The CVT oil warmer (1) is installed on the front part of transaxle
assembly.
• When engine is started while engine and CVT are cold, engine coolant temperature rises more quickly than CVT fluid tempera-
ture. CVT oil warmer is provided with two circuits for CVT and
engine coolant respectively so that warmed engine coolant warms
CVT quickly. This helps shorten CVT warming up time, improving
fuel economy.
• A cooling effect is obtained when CVT fluid temperature is high.
CVT Fluid Cooler (Water-cooling)
• The CVT fluid cooler (water-cooling) is installed in the radiator side tank (right side).
• CVT fluid is cooled by engine coolant.
SHIFT LOCK SYSTEM
Manual valve Distributes the clutch and brake operation pressures (pilot pressure) corresponding to
each shift position.
High clutch/reverse brake switching valve Switches the circuit for the high clutch and the reverse brake.
Torque converter clutch control valve It is operated with the torque converter clutch solenoid valve and it adjusts the tighten-
ing pressure and non-tightening pressure of the torque converter clutch piston of the
torque converter.
Primary pressure control valve It is operated with the primary pressure solenoid valve and adjusts the feed pressure to
the primary pulley.
Primary pressure solenoid valve TM-65, "
CVT CONTROL SYSTEM : Primary Pressure Solenoid Valve"
Low brake solenoid valve TM-65, "CVT CONTROL SYSTEM : Low Brake Solenoid Valve"
High clutch & reverse brake solenoid valveTM-66, "CVT CONTROL SYSTEM : High Clutch & Reverse Brake Solenoid Valve"
Torque converter clutch solenoid valve TM-66, "CVT CONTROL SYSTEM : Torque Converter Clutch Solenoid Valve"
Line pressure solenoid valve TM-66, "CVT CONTROL SYSTEM : Line Pressure Solenoid Valve"
Part name Function
JSDIA4074GB
JSDIA2586ZZ
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SYSTEMTM-77
< SYSTEM DESCRIPTION > [CVT: RE0F11A]
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INPUT/OUTPUT SIGNAL TABLE
SYSTEM DESCRIPTION
• CVT detects the vehicle driving status from switc hes, sensors and signals, and controls the vehicle so that
the optimum shift position and shift timing may always be achieved. It also controls the vehicle to reduce
shift and lockup shock, etc.
• Receives input signals from switches and sensors.
• Sends the output signal necessary for operation of solenoid valves, and evaluates the line pressure, shift timing, lockup operation, engine brake performance, etc.
• If a malfunction occurs on the electric system, activate the fail-safe mode only to drive the vehicle.
LIST OF CONTROL ITEMS AND INPUT/OUTPUT
Sensor (or signal)
⇒TCM function
⇒Actuator
• Engine and CVT integrated control signal
• Engine speed signal
• Accelerator pedal position signal
• Closed throttle position signal
• Stop lamp switch signal
• Secondary pressure sensor
• CVT fluid temperature sensor
• Primary speed sensor
• Secondary speed sensor
• Output speed sensor
• Transmission range switch signal
• Overdrive control switch signal
• Vehicle speed signal (ABS)
• ABS operation signal
• A/C compressor feedback signal
• G sensor
• N idle instruction signal
• Turn indicator signal • Line pressure control (
TM-82, "
LINE
PRESSURE CONTROL : System Descrip-
tion")
• Shift control ( TM-83, "
SHIFT CONTROL :
System Description")
• Select control ( TM-85, "
SELECT CON-
TROL : System Description")
• Lock-up control ( TM-86, "
LOCK-UP CON-
TROL : System Description")
• Idle neutral control ( TM-87, "
IDLE NEU-
TRAL CONTROL : System Description")
• Fail-safe mode ( TM-106, "
Fail-safe")
• Self-diagnosis function ( TM-93, "
CON-
SULT Function")
• Communication function with CONSULT
(TM-93, "
CONSULT Function")
• CAN communication control ( TM-141,
"Description") • Line pressure solenoid valve
• Primary pressure
solenoid valve
• Torque converter clutch solenoid
valve
• High clutch & reverse brake sole- noid valve
• Low brake solenoid valve
• OD OFF indicator lamp
• Shift position indicator
Control Item Shift controlLine pressure
control Select control
Lock-up con-
trol Fail-safe func-
tion *
Input Engine torque signal
(CAN communication)
×××××
Engine speed signal
(CAN communication) ×××××
Accelerator pedal position signal
(CAN communication) ×××××
Closed throttle position signal
(CAN communication) ××
×
Stop lamp switch signal
(CAN communication) ××××
Secondary pressure sensor ××× ×
CVT fluid temperature sensor ××××
Primary speed sensor ×× ××
Secondary speed sensor ×××××
Output speed sensor ×××××
Transmission range switch ×××××
Overdrive control switch
(CAN communication) ×
Revision: August 2015
2016 Versa Note

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TM-80
< SYSTEM DESCRIPTION >[CVT: RE0F11A]
SYSTEM
CVT CONTROL SYSTEM : Protection Control
INFOID:0000000012431020
The TCM becomes the protection control status temporarily to protect the safety when the safety of TCM and
transmission is lost. It automatically returns to the normal status if the safety is secured.
The TCM has the following protection control.
CONTROL FOR WHEEL SPIN
P0999•Start is slow
• Lock-up is not performed
Wire disconnection
• Vehicle speed is not increased
• Lock-up is not performed Voltage shorting
P099B Start is slow —
P099C •Start is slow
• Lock-up is not performed
Wire disconnection
• Vehicle speed is not increased
• Lock-up is not performed Voltage shorting
P1586 Idle neutral control is not performed —
P1588 Idle neutral control is not performed —
P2765 • Selector shock is large
•Start is slow
• Acceleration is slow
• Vehicle speed is not increased
• Lock-up is not performed
—
P2857 •Start is slow
• Lock-up is not performed —
P2858 • Vehicle speed is not increased
• Lock-up is not performed —
P2859 Vehicle speed is not increased —
P285A Start is slow —
U0073 • Selector shock is large
•Start is slow
• Acceleration is slow
• Lock-up is not performed —
U0100 • Selector shock is large
•Start is slow
• Acceleration is slow
• Lock-up is not performed —
U0140 Not changed from normal driving —
U0141 Not changed from normal driving —
U0155 Not changed from normal driving —
U0300 • Selector shock is large
•Start is slow
• Acceleration is slow
• Lock-up is not performed —
U1000 Not changed from normal driving —
U1114 Not changed from normal driving —
U1117 Not changed from normal driving —
DTC
Vehicle behavior Conditions of vehicle
ControlWhen a wheel spin is detected, the engine output and gear ratio are limited and the line pressure is increased.
At the 1GR, the clutch pressure is increased.
Revision: August 2015
2016 Versa Note

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TM-82
< SYSTEM DESCRIPTION >[CVT: RE0F11A]
SYSTEM
LINE PRESSURE CONTROL : System Description
INFOID:0000000012431021
SYSTEM DIAGRAM
DESCRIPTION
Highly accurate line pressure control (secondary pressure control) reduces friction for improvement of fuel
economy.
Normal Oil Pressure Control
Appropriate line pressure and secondary pressure su itable for driving condition are determined based on the
accelerator pedal position, engine speed, primary pulle y (input) speed, secondary pulley (output) speed, vehi-
cle speed, input torque, stop lamp switch signal, transmission range switch signal, lock-up signal, power volt-
age, target shift ratio, oil temperature and oil pressure.
Secondary Pressure Feedback Control
In normal oil pressure control and oil pressure control in shifting, highly accurate secondary pressure is deter-
mined by detecting the secondary pressure using a oil pressure sensor and by feedback control.
SHIFT CONTROL
JSDIA1864GB
Revision: August 2015 2016 Versa Note

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TM-86
< SYSTEM DESCRIPTION >[CVT: RE0F11A]
SYSTEM
LOCK-UP CONTROL : System Description
INFOID:0000000012431024
SYSTEM DIAGRAM
DESCRIPTION
• Controls for improvement of the transmission effi ciency by engaging the torque converter clutch in the
torque converter and eliminating slip of the converter. Achieves comfortable driving with slip control of the
torque converter clutch.
• The oil pressure feed circuit for the torque converter clutch piston chamber is connected to the torque con- verter clutch control valve. The torque converter clut ch control valve is switched by the torque converter
clutch solenoid valve with the signal from TCM. This controls the oil pressure circuit, which is supplied to the
torque converter clutch piston chamber, to the release side or engagement side.
• If the CVT fluid temperature is low or the vehicle is in fail-safe mode due to malfunction, lock-up control is
prohibited.
Lock-up engagement
In lock-up engagement, the torque converter clutch solenoi d valve makes the torque converter clutch control
valve locked up to generate the lock-up apply pressure. This pushes the torque converter clutch piston for
engagement.
Lock-up release condition
In lock-up release, the torque converter clutch solenoid valve makes the torque converter clutch control valve
non-locked up to drain the lock-up apply pressure. This does not engage the torque converter clutch piston.
IDLE NEUTRAL CONTROL
JSDIA1865GB
Revision: August 2015 2016 Versa Note

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SYSTEMTM-87
< SYSTEM DESCRIPTION > [CVT: RE0F11A]
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IDLE NEUTRAL CONTROL : System DescriptionINFOID:0000000012431025
SYSTEM DIAGRAM
DESCRIPTION
If a driver has no intention of starting the vehicle in D position, TCM operates the low brake solenoid valve and
controls the oil pressure of the low brake to be low pressure. Therefore, the low brake is in the release (slip)
status and the power transmission route of transaxle is the same status as the N position. In this way, the tran-
saxle is in idling status and load to the engine can be reduced to improve fuel economy.
NOTE:
JSDIA2535GB
Revision: August 2015 2016 Versa Note

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