2014 NISSAN TEANA Pressure

TM-206
< UNIT REMOVAL AND INSTALLATION >[CVT: RE0F10D]
TRANSAXLE ASSEMBLY
UNIT REMOVAL AND INSTALLATION
TRANSAXLE ASSEMBLY
Exploded ViewINFOID:0000000009464160
Removal and InstallationINFOID:0000000009464161
REMOVAL
WARNING:
Do not remove the radiator cap when the engine is hot. Serious burns could occur from high pressure
coolant escaping from the radiator. Wrap a thick cl oth around the cap. Slowly turn a quarter turn to
allow built-up pressure to escape. Carefully remove the cap by turning it all the way.
CAUTION:
• Perform when the engine is cold.
• When replacing the TCM and transaxle assembly as a set, replace the transaxle assembly first and
then replace the TCM. Refer to TM-80, "Description"
.
NOTE:
When removing components such as hoses, tubes/lines, etc. , cap or plug openings to prevent fluid from spill-
ing.
1. Remove engine and transaxle assembly. Refer to EM-84, "Removal and Installation"
.
Transaxle assembly O-ring CVT fluid charging pipe
CVT fluid charging pipe cap
: For the tightening torque, refer to TM-206, "Removal and Installation"
.
: Always replace after every disassembly.
: N·m (kg-m, ft-lb)
: N·m (kg-m, in-lb)
: Apply petroleum jelly
JSDIA3632GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

COMPONENT PARTSTM-219
< SYSTEM DESCRIPTION > [CVT: RE0F10E]
C
EF
G H
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K L
M A
B
TM
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*: These components are included in control valve assembly.
CVT CONTROL SYSTEM : TCMINFOID:0000000009464181
• The vehicle driving status is judged based on the signals from the sensors, switches, and other control units,
and the optimal transaxle control is performed.
• For TCM control items, refer to TM-232, "CVT CONTROL SYSTEM : System Description"
.
CVT CONTROL SYSTEM : Transmission Range SwitchINFOID:0000000009464182
• The transmission range switch is installed to upper part of transaxle case.
• The transmission range switch detects the selector lever position.
CVT CONTROL SYSTEM : Primary Speed SensorINFOID:0000000009464183
• The primary speed sensor is installed to side cover of transaxle.
• The primary speed sensor detects primary pulley speed.
Combination meter The TCM receives the following signal via CAN communications from the
combination meter for judging the driving request from the driver.
• Paddle shift up signal
• Paddle shift down signal
• Vehicle speed signal
The TCM transmits the following signal via CAN communications to the
combination meter.
• Shift position indicator signal
Refer to MWI-6, "METER SYSTEM : Component Parts Location"
for de-
tailed installation location.
O/D OFF indicator lamp When the ignition switch is pushed to the ON position, the light comes on
for 2 seconds.
Malfunction indicator lamp (MIL) TM-243, "DIAGNOSIS DESCRIPTION : Malfunction Indicator Lamp (MIL)"
Shift position indicator TM-223, "CVT CONTROL SYSTEM : Shift Position Indicator"
ABS actuator and electric unit (control unit)The TCM receives the following signal via CAN communications from the
ABS actuator and electric unit (control unit).
• ABS operation signal
Refer to BRC-8, "Component Parts Location"
for detailed installation loca-
tion.
BCM Refer to
BCS-4, "BODY CONTROL SYSTEM : Component Parts Location"

for detailed installation location.
Transmission range switch TM-219, "CVT CONTROL SYSTEM : Transmission Range Switch"
Input speed sensor TM-220, "CVT CONTROL SYSTEM : Input Speed Sensor"
CVT unit connector —
Primary speed sensor TM-219, "CVT CONTROL SYSTEM : Primary Speed Sensor"
Output speed sensor TM-220, "CVT CONTROL SYSTEM : Output Speed Sensor"
Control
valve CVT fluid temperature sensor*
TM-221, "CVT CONTROL SYSTEM : CVT Fluid Temperature Sensor"
Primary pressure sensor* TM-221, "CVT CONTROL SYSTEM : Primary Pressure Sensor"
Secondary pressure sensor* TM-222, "CVT CONTROL SYSTEM : Secondary Pressure Sensor"
Primary pressure solenoid valve* TM-222, "CVT CONTROL SYSTEM : Primary Pressure Solenoid Valve"
Secondary pressure solenoid valve* TM-222, "CVT CONTROL SYSTEM : Seco ndary Pressure Solenoid Valve"
Select solenoid valve* TM-223, "CVT CONTROL SYSTEM : Select Solenoid Valve"
Torque converter clutch solenoid
valve* TM-223, "CVT CONTROL SYSTEM : Torq
ue Converter Clutch Solenoid
Va l v e "
Line pressure solenoid valve* TM-223, "CVT CONTROL SYSTEM : Line Pressure Solenoid Valve"
Paddle shifter TM-223, "CVT CONTROL SYSTEM : Paddle Shifter"
No. Component Function
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

COMPONENT PARTSTM-221
< SYSTEM DESCRIPTION > [CVT: RE0F10E]
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G H
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M A
B
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• The input speed sensor generates an ON-OFF pulse signal according to the rotating body speed. TCM
judges the rotating body speed from the pulse signal.
CVT CONTROL SYSTEM : CVT Fluid Temperature SensorINFOID:0000000009464186
• The CVT fluid temperature sensor is installed to control valve.
• The CVT fluid temperature sensor detects CVT fluid temperature in oil pan.
• The fluid temperature sensor uses a thermistor, and changes the signal voltage by converting changes in the
CVT fluid temperature to a resistance value. TCM eval uates the CVT fluid temperature from the signal volt-
age value.
CVT CONTROL SYSTEM : Pr imary Pressure SensorINFOID:0000000009464187
• The primary pressure sensor is installed to control valve.
• The primary pressure sensor detects the pressure applied to the primary pulley.
JSDIA1824GB
JSDIA1825GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

TM-222
< SYSTEM DESCRIPTION >[CVT: RE0F10E]
COMPONENT PARTS
• When pressure is applied to the ceramic device in
the primary pressure sensor, the ceramic device is
deformed, resulting in voltage change. TCM evaluates the primary pressure from its voltage change. Voltage
is increased along with pressure increase.
CVT CONTROL SYSTEM : Secondary Pressure SensorINFOID:0000000009464188
• The secondary pressure sensor is installed to control valve.
• The secondary pressure sensor detects the pressure applied to the secondary pulley.
• When pressure is applied to the metal diaphragm in the secondary pressure sensor, the metal diaphragm is
deformed, resulting in voltage change. TCM evaluates the secondary pressure from its voltage change. Volt-
age is increased along with pressure increase.
CVT CONTROL SYSTEM : Primary Pressure Solenoid ValveINFOID:0000000009464189
• The primary pressure solenoid valve is installed to control valve.
• The primary pressure solenoid valve controls the prim ary reducing valve. For information about the primary
reducing valve, refer to TM-229, "TRANSAXLE : Component Description"
.
• The primary pressure solenoid valve uses the linear solenoid valve [N/H (normal high) type].
NOTE:
• The principle of the linear solenoid valve utilizes the fa ct that the force pressing on the valve spool installed
inside the coil increases nearly in proportion to the current . This allows it to produce a fluid pressure that is
proportional to this pressing force.
• The N/H (normal high) produces hydraulic control when the coil is not energized.
CVT CONTROL SYSTEM : Secondary Pressure Solenoid ValveINFOID:0000000009464190
• The secondary pressure solenoid valve is installed to control valve.
• The secondary pressure solenoid valve controls t he secondary reducing valve. For information about the
secondary reducing valve, refer to TM-229, "TRANSAXLE : Component Description"
.
• The secondary pressure solenoid valve uses the linear solenoid valve [N/H (normal high) type].
JSDIA1831GB
JSDIA1831GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

COMPONENT PARTSTM-223
< SYSTEM DESCRIPTION > [CVT: RE0F10E]
C
EF
G H
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M A
B
TM
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NOTE:
• The principle of the linear solenoid valve utilizes the fa ct that the force pressing on the valve spool installed
inside the coil increases nearly in proportion to the current . This allows it to produce a fluid pressure that is
proportional to this pressing force.
• The N/H (normal high) produces hydraulic control when the coil is not energized.
CVT CONTROL SYSTEM : Se lect Solenoid ValveINFOID:0000000009464191
• The select solenoid valve is installed to control valve.
• The select solenoid valve adjusts the tightening pressure of the forward clutch and reverse brake. For infor-
mation about the forward clutch and reverse brake, refer to TM-229, "TRANSAXLE : Component Descrip-
tion".
• The select solenoid valve uses the linear solenoid valve [N/H (normal high) type]. NOTE:
• The principle of the linear solenoid valve utilizes the fa ct that the force pressing on the valve spool installed
inside the coil increases nearly in proportion to the current . This allows it to produce a fluid pressure that is
proportional to this pressing force.
• The N/H (normal high) type produces hydraulic control when the coil is not energized.
CVT CONTROL SYSTEM : Torque Converter Clutch Solenoid ValveINFOID:0000000009464192
• The torque converter clutch solenoid valve is installed to control valve.
• The torque converter clutch solenoid valve controls the torque converter clutch control valve. For information
about the torque converter clutch control valve, refer to TM-229, "TRANSAXLE : Component Description"
.
• The torque converter clutch solenoid valve utilizes a linear solenoid valve [N/L (normal low) type]. NOTE:
• The principle of the linear solenoid valve utilizes the fa ct that the force pressing on the valve spool installed
inside the coil increases nearly in proportion to the current . This allows it to produce a fluid pressure that is
proportional to this pressing force.
• The N/L (normal low) type does not produce hydraulic control when the coil is not energized.
CVT CONTROL SYSTEM : Line Pressure Solenoid ValveINFOID:0000000009464193
• The line pressure solenoid valve is installed to control valve.
• The line pressure solenoid valve controls the pressu re regulator valve. For information about the pressure
regulator valve, refer to TM-229, "TRANSAXLE : Component Description"
.
• The line pressure solenoid valve uses the linear solenoid valve [N/H (normal high) type]. NOTE:
• The principle of the linear solenoid valve utilizes the fa ct that the force pressing on the valve spool installed
inside the coil increases nearly in proportion to the current . This allows it to produce a fluid pressure that is
proportional to this pressing force.
• The N/H (normal high) produces hydraulic control when the coil is not energized.
CVT CONTROL SYSTEM : Paddle ShifterINFOID:0000000009464194
• The paddle shifter is installed to the steering.
• The paddle shifter transmits shift up and shift down switch signals to the combination meter. Then TCM
receives signals from the combination meter via CAN communication.
PADDLE SHIFTER FUNCTION
CVT CONTROL SYSTEM : Sh ift Position IndicatorINFOID:0000000009464195
TCM transmits shift position signal to combination mete r via CAN communication. The actual shift position is
displayed on combination meter according to the signal.
SHIFT LOCK SYSTEM
Selector lever po-
sition Function
D Although driving in manual mode is possible, selector lever automatically returns to D position after a certain period
of time because the selector lever is not fixed in manual mode.
DS Driving with the selector lever fixed in manual mode is possible.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

TM-226
< SYSTEM DESCRIPTION >[CVT: RE0F10E]
STRUCTURE AND OPERATION
TRANSAXLE : Operation Status
INFOID:0000000009464198
× : Engaged or applied.
TRANSAXLE : Trans axle MechanismINFOID:0000000009464199
TORQUE CONVERTER (WITH LOCK-UP FUNCTION)
In the same way as a conventional A/T, the torque c onverter is a system that increases the engine torque and
transmits the torque to the transaxle. A symmetr ical 3-element, 1-stage, 2-phase type is used here.
OIL PUMP
Utilizes a vane-type oil pump that is driven by the engi ne through the oil pump drive chain in order to increase
efficiency of pump discharge volume in low-speed zone and optimize pump discharge volume in high-speed
zone. Discharged oil from oil pump is transmitted to contro l valve. It is used as the oil of primary and second-
ary pulley operation, the oil of clutch operation, and the lubricant for each part.
PLANETARY GEAR
• A planetary gear type of forward/reverse selector me chanism is installed between the torque converter and
primary pulley.
• The power from the torque converter is input via the i nput shaft, operating a wet multi-plate clutch by means
of hydraulic pressure to switch between forward and reverse driving.
Operation of Planetary gear
BELT & PULLEY
It is composed of a pair of pulleys (the groove width is changed freely in the axial direction) and the chain belt
.The groove width changes according to wrapping radius of chain belt and pulley from low status to overdrive
status continuously with non-step. It is controlled wit h the oil pressures of primary pulley and secondary pulley.
Chain belt
Selector lever
position Parking mech-
anism Forward
clutch Reverse brake Primary pulley Secondary
pulley Chain belt Final drive
P ×
R ×××××
N
D × ××××
DS × ××××
JSDIA2426GB
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TM-228
< SYSTEM DESCRIPTION >[CVT: RE0F10E]
STRUCTURE AND OPERATION
The deceleration gears are composed of 2 stages: primar
y deceleration (output gear, idler gear pair) and sec-
ondary deceleration (reduction gear, final gear pair). All of these gears are helical gears.
The lubrication oil is the same as the CVT fluid which lubricates the entire transaxle.
TRANSAXLE : Oil Pressure System INFOID:0000000009464200
Oil pressure required for operation of the transaxle transmission mechanism is generated by oil pump, oil
pressure control valve, solenoid valve, etc.
JSDIA2427GB
JSDIA3786GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

STRUCTURE AND OPERATIONTM-229
< SYSTEM DESCRIPTION > [CVT: RE0F10E]
C
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G H
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M A
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TM
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TRANSAXLE : Component DescriptionINFOID:0000000009464201
FLUID COOLER & FLUID WARMER SYSTEM
Part name Function
Torque converter Increases engine torque and transmits it to the transaxle.
Oil pump Utilizes a vane-type oil pump that is driven by the engine through the oil pump drive chain in order to
increase efficiency of pump discharge volume in low-speed zone and optimize pump discharge volume
in high-speed zone. Discharged oil from oil pump is tr ansmitted to control valve. It is used as the oil of
primary and secondary pulley operation, the oil of clutch operation, and the lubricant for each part.
Forward clutch The forward clutch is wet and multiple plate type clutch that consists of clutch drum, piston, drive plate,
and driven plate. It is a clutch to move the vehicle forward by activating piston hydraulically, engaging
plates, and directly connecting sun gear and input shaft.
Reverse brake The reverse brake is a wet multiple-plate type brake that consists of transaxle case, piston, drive plate,
and driven plate. It is a brake to move the vehicle in reverse by activating piston hydraulically, engaging
plates, and fixing planetary gear.
Internal gear The internal gear is directly connected to forward clutch drum. It is a gear that moves the outer edge of
pinion planet of planet carrier. It transmits power to move the vehicle in reverse when the planet carrier
is fixed.
Planet carrier Composed of a carrier, pinion planet, and pinion shaft. This gear fixes and releases the planet carrier in
order to switch between forward and reverse driving.
Sun gear Sun gear is a set part with planet carrier and internal gear. It transmits transmitted force to primary fixed
sheave. It rotates in forward or reverse direction according to activation of either forward clutch or re-
verse brake.
Input shaft The input shaft is directly connected to forward clutch drum and transmits traction force from torque con-
verter. In shaft center, there are holes for hydraulic distribution to primary pulley and hydraulic distribution
for lockup ON/OFF.
Primary pulley It is composed of a pair of pulleys (the groove width is changed freely in the axial direction) and the chain belt. 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.
Secondary pulley
Chain belt
Manual shaft When the manual shaft is in the P position, the parking rod that is linked to the manual shaft rotates the
parking pole. When the parking pole rotates, it engages with the parking gear, fixing the parking gear. As
a result, the secondary pulley that is integrated with the parking gear is fixed.
Parking rod
Parking pawl
Parking gear
Output gear
The deceleration gears are composed of 2 stages: primary deceleration (output gear, idler gear pair) and
secondary deceleration (reduction gear, final gear pair). All of these gears are helical gears.
Idler gear
Reduction gear
Differential
Torque converter regulator
valve Adjusts the feed pressure to the torque converter to the optimum pressure corresponding to the driving
condition.
Pressure regulator valve Adjusts the discharge pressure from the oil pump to the optimum pressure (line pressure) corresponding
to the driving condition.
Torque converter clutch
control valve Adjusts the torque converter engage and disengage pressures.
Manual valve Distributes the clutch operation pressure to each circuit according to the selector lever position.
Secondary reducing valve Reduces line pressure and adjusts secondary pressure.
Primary reducing valve Reduces line pressure and adjusts primary pressure.
Pilot valve A Reduces line pressure and adjusts pilot pressure to the solenoid valves listed below.
• Primary pressure solenoid valve
• Secondary pressure solenoid valve
• Select solenoid valve
• Line pressure solenoid valve
Pilot valve B Reduces pilot pressure and adjusts pilot pressure to the torque converter clutch solenoid valve.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM