2011 NISSAN TIIDA Pulley

TRANSAXLE ASSEMBLYAT-235
< SERVICE INFORMATION >
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• When replacing an engine or transmission you must make sure any dowels are installed correctly during re-assembly.
• Improper alignment caused by missing dowels may cause vibration, oil leaks or breakage of drive
train components.
• Do not reuse O-rings and copper washers. Refer to "COMPONENTS".
• When turning crankshaft, turn it clockwise as viewed from the front of the engine.
• When tightening the bolts for th e torque converter while securing the crankshaft pulley bolt, be sure
to confirm the tightening torque of the crankshaft pulley bolt. Refer to EM-159
.
• After converter is installed to drive plate, ro tate crankshaft several turns to check that transaxle
rotates freely without binding.
• When installing the torque converter to the transaxle measure dis- tance A.
• Check the fitting of the dowel pins when installing the transaxle assembly and the engine assembly.
: Dowel pin
• When installing the transaxle to the engine, align the matching mark on the drive plate with the matching mark on the torque converter.
• When securing the transaxle to the engine, attach the bolts in accordance with the following standard.
HR16DE engine models
(A): A/T to engine
(B): Engine to A/T
• When installing the transaxle to the engine, align the matching mark on the drive plate with the matching mark on the torque converter.
• When securing the transaxle to the engine, attach the bolts in accordance with the following standard. Dimension A: 14.4 mm (0.567 in) or more
SAT430D
SCIA7698E
Bolt No.
1 2 34
Number of bolts 2 2 13
Bolt length (L) [mm (in)] 40 (1.5 7) 44 (1.73) 69 (2.72) 49 (1.93)
Tightening torque
[N·m (kg-m, ft-lb)] 48 (4.9, 35)
SCIA7096E
Revision: May 2010
2011 Versa

CO-20
< ON-VEHICLE REPAIR >[HR16DE]
WATER PUMP
WATER PUMP
Exploded ViewINFOID:0000000005930787
Removal and InstallationINFOID:0000000005930788
REMOVAL
1. Drain engine coolant from radiator. Refer to
CO-11, "Changing Engine Coolant".
CAUTION:
• Perform this step when the engine is cold.
• Never spill engine coolant on drive belts.
2. Partially remove front fender protector (RH). Refer to EI-26, "
Removal and Installation".
3. Loosen mounting bolts of water pump pulley before loosening belt tension of drive belt.
4. Remove drive belt. Refer to EM-14, "
Removal and Installation".
5. Remove water pump pulley.
6. Remove water pump. • Loosen mounting bolts in reverse order as shown.
• Engine coolant will leak from cylinder block, so have a recep-tacle ready below.
CAUTION:
• Handle water pump vane so that it does not contact any other parts.
• Water pump cannot be disassembled and should be replaced as a unit.
INSTALLATION
Installation is in the reverse order of removal.
Water pump.
1. Gasket 2. Water pump3. Water pump pulley
PBIC3807E
KBIA3393J
Revision: May 2010 2011 Versa

WATER PUMPCO-21
< ON-VEHICLE REPAIR > [HR16DE]
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• Tighten bolts in numerical order as shown.
Water pump pulley.
CAUTION:
Never install mounting bolts (A) to oblong holes (B).
• Water pump pulley (1)
InspectionINFOID:0000000005930789
INSPECTION AFTER REMOVAL
• Visually check if there is no significant dirt or rusting on water
pump body and vane (A).
• Make sure that there is no looseness in vane shaft, and that it turns smoothly when rotated by hand.
• Replace water pump, if necessary.
INSPECTION AFTER INSTALLATION
• Check that the reservoir tank cap is tightened.
• Check for leaks of engine coolant. Refer to CO-11, "
Inspection".
• Start and warm up the engine. Visually check for leaks of engine coolant.
KBIA3393J
PBIC3809E
PBIC3808E
Revision: May 2010 2011 Versa

CVT SYSTEMCVT-19
< SERVICE INFORMATION > [RE0F08B]
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CVT SYSTEM
Cross-Sectional View - RE0F08BINFOID:0000000005928733
1. Converter housing 2. Oil pump3. Forward clutch
4. Reverse brake 5. Planetary carrier6. Primary pulley
7. Steel belt 8. Sun gear9. Side cover
10. Internal gear 11. Secondary pulley12. Differential case
13. Final gear 14. Idler gear15. Reduction gear
16. Output gear 17. Parking gear18. Input shaft
19. Torque converter
SCIA8015E
Revision: May 2010 2011 Versa

CVT SYSTEMCVT-23
< SERVICE INFORMATION > [RE0F08B]
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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 ControlINFOID:0000000005928739
• 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 transmission range switch signal, the lock-up signal, the voltage, the target
gear ratio, the fluid temperat ure, 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 ControlINFOID:0000000005928740
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-
putSte p mo tor
XX
TCC solenoid valve XXX
Lock-up select solenoid valve XXX
Line pressure solenoid valve XXX X
Secondary pressure solenoid valve XX X
O/D OFF indicator signal
(*2)XX
Control item
Fluid
pressure
control Select con-
trol Shift control
Lock-up
control CAN com-
munication
control Fail-safe
function
(*3)
SCIA1846E
Revision: May 2010 2011 Versa

CVT-24
< 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 and control the gear ratio.
NOTE:
The gear ratio is set for every position separately.
“D” POSITION
Shifting over all the ranges of gear ratios from the lowest to the high-
est.
OVERDRIVE-OFF MODE
Use this position for the improved engine braking.
“L” POSITION
By limiting the gear range to the lowest position, the strong driving
force and the engine brake can be secured.
DOWNHILL ENGINE BRAKE CONTROL
(AUTO ENGINE BRAKE CONTROL)
When downhill is detected with the accelerator pedal released, the engine brake will be strengthened up by
downshifting so as not to accelerate the vehicle more than necessary.
ACCELERATION CONTROL
According to vehicle speed and a change of accelerator pedal angle, driver's request for acceleration and driv-
ing scene are judged. This function assists improvem ent in acceleration feeling by making the engine speed
proportionate to the vehicle speed. And a shift map which can gain a larger driving force is available for com-
patibility of mileage with driveability.
AWDIA0770GB
SCIA1953E
SCIA1955E
Revision: May 2010 2011 Versa

CVT SYSTEMCVT-25
< SERVICE INFORMATION > [RE0F08B]
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Lock-up and Select ControlINFOID:0000000005928741
• 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

CVT-26
< SERVICE INFORMATION >[RE0F08B]
CVT SYSTEM
Name
Function
Torque converter regulator valve Optimizes the supply pressure for the torque converter depending on driving conditions.
Pressure regulator valve Optimizes the discharge pressure from the oil pump depending on driving conditions.
TCC control valve • Activates or deactivate the lock-up.
• Lock-up smoothly by opening lock-up operation excessively.
TCC solenoid valve Controls the TCC control valve or select control valve.
Shift control valve Controls flow-in/out of line pressure from the primary pulley depending on the stroke dif-
ference between the stepping motor and the primary pulley.
Secondary valve Controls the line pressure from the secondary pulley depending on operating conditions.
Clutch regulator valve Adjusts the clutch operating pressure depending on operating conditions.
Secondary pressure solenoid valve Controls the secondary valve.
Line pressure solenoid valve Controls the line pressure control valve.
Step motor Controls the pulley ratio.
Manual valve Transmits the clutch operating pressure to each circuit in accordance with the selected
position.
Select control valve Engages forward clutch, reverse brake smoothly depending on select operation.
Select switch valve Switches torque converter clutch solenoid valve control pressure use to torque converter
clutch control valve or select control valve.
Lock-up select solenoid valve Controls the select switch valve.
Revision: May 2010 2011 Versa