Nissan Versa Sedan. Manual — part 841
TM-270
< 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 Status
INFOID:0000000009268080
×: 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)
×
×
×
×
STRUCTURE AND OPERATION
TM-271
< SYSTEM DESCRIPTION >
[CVT: RE0F11A]
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TRANSAXLE : Oil Pressure System
INFOID:0000000009268081
Oil pressure required for operation of the transaxle transmission mechanism is generated by oil pump, oil
pressure control valve, solenoid valve, etc.
TRANSAXLE : Component Description
INFOID:0000000009268082
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 regulator 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.
TM-272
< SYSTEM DESCRIPTION >
[CVT: RE0F11A]
STRUCTURE AND OPERATION
FLUID COOLER & FLUID WARMER SYSTEM
FLUID COOLER & FLUID WARMER SYSTEM : System Description
INFOID:0000000009268083
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.
Heater Thermostat
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-265, "CVT CONTROL SYSTEM : Primary Pressure Solenoid Valve"
Low brake solenoid valve
TM-265, "CVT CONTROL SYSTEM : Low Brake Solenoid Valve"
High clutch & reverse brake solenoid valve
TM-265, "CVT CONTROL SYSTEM : High Clutch & Reverse Brake Solenoid Valve"
Torque converter clutch solenoid valve
TM-265, "CVT CONTROL SYSTEM : Torque Converter Clutch Solenoid Valve"
Line pressure solenoid valve
TM-266, "CVT CONTROL SYSTEM : Line Pressure Solenoid Valve"
Part name
Function
JSDIA2430GB
JSDIA2586ZZ
STRUCTURE AND OPERATION
TM-273
< SYSTEM DESCRIPTION >
[CVT: RE0F11A]
C
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TM
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• The heater thermostat (1) is installed on the front part of transaxle
assembly.
• The heater thermostat starts opening before the completion of an
engine warm-up and fully opens at the completion of the engine
warm-up. This allows the transaxle to be warmed up when CVT
fluid temperature is lower than coolant temperature under low tem-
perature conditions.
SHIFT LOCK SYSTEM
SHIFT LOCK SYSTEM : System Description
INFOID:0000000009268093
The selector lever cannot be shifted from “P” position to any other position unless the ignition switch is in the
ON position and the brake pedal is depressed.
KEY LOCK SYSTEM
KEY LOCK SYSTEM : System Description
INFOID:0000000009268094
• The key lock mechanism also operates as a shift lock:
With the ignition switch turned to ON, selector lever cannot be shifted from “P” position to any other position
unless brake pedal is depressed.
With the key removed, selector lever cannot be shifted from “P” position to any other position.
The key cannot be removed unless selector lever is placed in “P” position.
• The shift lock and key lock mechanisms are controlled by the ON-OFF operation of the shift lock solenoid
and by the operation of the rotator and slider located inside key cylinder, respectively.
JSDIA2585ZZ
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