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) ××××
Revision: August 2015 2016 Versa Note
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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.
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2016 Versa Note
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STALL TESTTM-131
< BASIC INSPECTION > [CVT: RE0F11A]
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STALL TEST
Work ProcedureINFOID:0000000012431048
INSPECTION
1. Check the engine oil level. Replenish if necessary.
2. Check for leak of the CVT fluid. Refer to TM-228, "
Inspection".
3. Drive for about 10 minutes to warm up the vehicle so that the CVT fluid temperature is 50 to 80°C (122 to
176° F).
4. Be sure to apply the parking brake and block the tires.
5. Start the engine, depress the brake pedal and put the selector lever to the D position.
6. While depressing the brake pedal, depress the accelerator pedal gradually.
7. Read the stall speed quickly. Then, release your foot from the accelerator pedal quickly. CAUTION:
Do not depress the accelerator pedal fo r 5 seconds or more during the test.
8. Place the selector lever in the N position.
9. Cool the CVT fluid. CAUTION:
Run the engine with the idle speed for at least 1 minute.
10. Put the selector lever to the R position and perform Step 6 to Step 9 again.
NARROWING-DOWN MALFUNCTIONING PARTS
O: Within the stall speed standard value
H: Stall speed is higher than the standard value.
L: Stall speed is lower than the standard value.
Stall speed : Refer to TM-265, "Stall Speed".
Selector lever position
Possible cause
DR
Sta ll sp ee d H
O • Low brake
O H • Reverse brake
LL •Engine
• Torque converter one way clutch
HH • Line pressure is low.
• Primary pulley
• Secondary pulley
• Steel belt
Revision: August 2015
2016 Versa Note
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CVT CONTROL SYSTEMTM-225
< SYMPTOM DIAGNOSIS > [CVT: RE0F11A]
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Symptom diagnosis chart 1-2
Symptom Replace the transaxle assembly.
Oil pres-
sure con- trol Power transmission
Valve body, control valve
Oil pump
Torque converter
Pulley, steel belt
Low brake
High clutch
Reverse brake
Bearings
Counter gear
Planetary gear
Reduction gear
Final gear, differential gear
Parking mechanism
TM-259
Driving is
not possi- ble. The engine speed increases in
“D”, “L”, or “R” position, but the
vehicle cannot start.
11 11
(In “D” or “L”) 1
(In “R”) 1111
Engine stall occurs in “D”, “L”,
or “R” position and the vehicle
does not start. 1
111111
Acceleration at start is not suf-
ficient in “D”, “L”, or “R” posi-
tion. 111
(In “D” or “L”) 1
(In “R”)
The engine speed increases
suddenly in “D”, “L”, or “R” po-
sition during driving. 11 11
(In “D” or “L”) 1
(In “D” or “L”) 1
(In “R”)
Engine brake is suddenly ap-
plied in “D” or “R” position dur-
ing driving. 1
1
(In “D” or
“L”) 1
(In “D” or
“L”) 1
(In “R”)
Shifting is
not possi- ble. The engine races when the
auxiliary gearbox is shifted
from 1GR ⇔
2GR. 11 2 1 1
Engine braking is not effective
in “L” position. 1212 1 1
Shifting does not occur with
OD OFF.
Engine stall occurs immedi-
ately before stop at decelera-
tion in “D” or “L” position. 11
During driving in “D” position,
slippage occurs in lockup or
lockup is not possible. 11
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2016 Versa Note
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CVT CONTROL SYSTEMTM-227
< SYMPTOM DIAGNOSIS > [CVT: RE0F11A]
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Symptom diagnosis chart 2-2
Symptom Replace the transaxle assembly.
Oil pres-
sure con- trol Power transmission
Valve body, control valve
Oil pump
Torque converter
Pulley, steel belt
Low brake
High clutch
Reverse brake
Bearings
Counter gear
Planetary gear
Reduction gear
Final gear, differential gear
Parking mechanism
TM-259
Shock vi-
bration
Noise Shock at start is large in “D”,
“L”, or “R” position.
111
(In “D” or “L”) 1
(In “R”) 2222
Shock is large when the auxil-
iary gearbox is shifted from
1GR → 2GR. 11
1
Shock in lockup is large dur-
ing driving in “D” or “L” posi-
tion. 11
Shock is large when the lever
is shifted from “N” → “D” and
“N” → “R” positions. 11
(“N” →
“D”) 1
(“N” →
“D”)
Shock is large when the lever
is shifted from “D” → “L” posi-
tion. 11
1
Vibration occurs in “D”, “L”, or
“R” position during driving. 11111
(In “D” or “L”) 1
(In “D” or “L”) 1
(In “R”) 11111
Noise occurs during driving. 1 1 1 11111
Noise occurs in idling. 1 1 1 1 1 1
Other Starter operates in “D”, “L”, or
“R” position.
Starter does not operate in “P”
or “N” position.
Engine stall occurs
in “D”, “L”,
or “R” position during stop. 11
Engine stall occurs in “P” or
“N” position during stop.
Parking lock does not operate
in “P” position. 1
Parking lock cannot be can-
celled when the selector lever
is shifted from “P” position to
other position. 1
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VTL-1
VENTILATION, HEATER & AIR CONDITIONER
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CONTENTS
VENTILATION SYSTEM
PRECAUTION ....... ........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution for Work ..................................................2
PREPARATION ............................................3
PREPARATION .............................................. .....3
Special Service Tool ........................................... ......3
Commercial Service Tool ..........................................3
SYSTEM DESCRIPTION ..............................4
VENTILATION SYSTEM ................................ .....4
System Description ............................................. ......4
REMOVAL AND INSTALLATION ................5
DUCT AND GRILLE ....................................... .....5
Exploded View .................................................... ......5
CENTER VENTILATOR GRILLE .......................... ......6
CENTER VENTILATOR GRILLE : Removal and
Installation .................................................................
6
SIDE VENTILATOR GRILLE ................................. .....6
SIDE VENTILATOR GRILLE : Removal and In-
stallation ...................................................................
6
SIDE DEFROSTER GRILLE .................................. .....6
SIDE DEFROSTER GRILLE : Removal and In-
stallation ...................................................................
6
CENTER VENTILATOR DUCT .............................. .....7
CENTER VENTILATOR DUCT : Removal and In-
stallation ...................................................................
7
CENTER DEFROSTER DUCT ............................... .....7
CENTER DEFROSTER DUCT : Removal and In-
stallation ...................................................................
7
SIDE DEFROSTER DUCT ..................................... .....7
SIDE DEFROSTER DUCT : Removal and Instal-
lation .........................................................................
7
FOOT DUCT ........................................................... .....7
FOOT DUCT : Removal and Installation ..................7
REAR FLOOR DUCT ............................................. .....8
REAR FLOOR DUCT : Removal and Installation .....8
FRONT BLOWER MOTOR ................................9
Exploded View ..........................................................9
Removal and Installation ..........................................9
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