2014 NISSAN TEANA Sec pressure

CVT CONTROL SYSTEMTM-175
< SYMPTOM DIAGNOSIS > [CVT: RE0F10D]
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Other No creep at all. 243789101112 5613141
Vehicle cannot run in any position. 8 256791011 3412131
With selector lever in D position,
driving is not possible. 8 256791011 3412131
With selector lever in R position,
driving is not possible. 8 256791011 3412131
Judder occurs during lock-up. 2 6 3 4 5 7 8 1
Strange noise in D position. 2 3 4 1
Strange noise in R position. 2 3 4 1
Strange noise in N position. 2 3 4 1
Vehicle does not decelerate by en-
gine brake. 73 456 2 81
Maximum speed low. 2 3 5 6 7 8 9 11 4 10 1
With selector lever in P position, ve-
hicle does not enter parking condi-
tion or, with selector lever in another
position, parking condition is not
cancelled. 12
Vehicle runs with CVT in P position. 1 3 4 2
Vehicle runs with CVT in N position. 1 3 4 2
Engine stall. 26 34 8957 101
Engine stalls when selector lever
shifted N → D or R. 26 34 5 71
Engine speed does not return to
idle. 24 3 51
Engine does not start in N or P posi-
tion. 321
Engine starts in positions other than
N or P. 321
Symptom
Engine system
CAN communication line (U1000)
Transmission range switch (P0705, P0706)
Input speed sensor (P0717)
Primary speed sensor (P0715)
Output speed sensor (P2765)
CVT fluid temperature sensor (P0711, P0712, P0713)
Primary pressure sensor (P084C, P084D)
Secondary pressure sensor (P0841, P0847, P0848)
Torque converter clutch solenoid valve (P0740, P0743, P0744)
Stall te st
CVT position
Power supply
Control valve
CVT fluid level and state
Ignition switch and starter
EC-105
TM-60TM-86TM-180TM-164TM-186TM-84
PG-19
,
STR-6
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

COMPONENT PARTSTM-219
< SYSTEM DESCRIPTION > [CVT: RE0F10E]
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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

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

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
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

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]
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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

SYSTEMTM-233
< SYSTEM DESCRIPTION > [CVT: RE0F10E]
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• 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 so lenoid valves, and evaluates the line pressure, shift
timing, lockup operation, engine brake performance, etc.
• If a malfunction occurs on the electric system, activa te the fail-safe mode only to drive the vehicle.
LIST OF CONTROL ITEMS AND INPUT/OUTPUT
*: If these input/output signals show errors, TCM activates the fail-safe function.
CVT CONTROL SYSTEM : Fail-safeINFOID:0000000009464205
TCM has a fail-safe mode. The mode functions so that operation can be continued even if the signal circuit of
the main electronically controlled input/output parts is damaged.
If the vehicle shows following behaviors including “poor acceleration”, a malfunction of the applicable system
is detected by TCM and the vehicle may be in a fail-s afe mode. At this time, check the DTC code and perform
inspection and repair according to the malfunction diagnosis procedures.
Fail-safe function
Control Item Shift control Line 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) ××××
Primary pressure sensor ×
Secondary pressure sensor ×× ×
CVT fluid temperature sensor ×××××
Primary speed sensor ×××××
Output speed sensor ×× ××
Input speed sensor ×××××
Transmission range switch ×××××
Paddle shifter
(CAN communication) ×× ×
Output Line pressure solenoid valve
××× ×
Primary pressure solenoid valve ×× ×
Torque converter clutch solenoid
valve ××
Secondary pressure solenoid valve ×× ×
Select solenoid valve ×××
Shift position indicator
(CAN communication) ×
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

TM-236
< SYSTEM DESCRIPTION >[CVT: RE0F10E]
SYSTEM
CVT CONTROL SYSTEM : Protection Control
INFOID:0000000009464206
The TCM becomes the protection control status temporar ily 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
TORQUE IS REDUCED WHEN DRIVING WITH THE REVERSE GEAR
CONTROL WHEN FLUID TEMPERATURE IS HIGH
P2813 • Selector shock is large
•Start is slow
• Acceleration is slow
• Vehicle speed is not increased When a malfunction occurs on the low oil pressure side
• Selector shock is large When a malfunction occurs on the high oil pressure side
P2814 • Selector shock is large —
P2815 • Selector shock is large —
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 — U1117 • Not changed from normal driving — DTC Vehicle behavior Conditions of vehicle
Control
When a wheel spin is detected, the engine output and gear ratio are limited and the line pressure is increased.
Limits engine output when a wheel spin occurs in any of right and left drive wheels.
Vehicle behavior in
control If the accelerator is kept depressing during wheel spin, the engine revolution and vehicle speed are limited to
a certain degree.
Normal retu rn condi-
tion Wheel spin convergence returns the control to the normal control.
Control Engine output is controlled according to a vehicle speed while reversing the vehicle.
Vehicle behavior in
control Power performance may be lowered while reversing the vehicle.
Normal retu rn condi-
tion Torque returns to normal by positioning the selector lever in a range other than “R” position.
Control
When the CVT fluid temperature is high, the gear shift permission maximum revolution and the maximum
torque are reduced than usual to prevent increase of the oil temperature.
Vehicle behavior in
control Power performance may be lowered, compared to normal control.
Normal retu rn condi-
tion The control returns to the normal control when CVT fluid temperature is lowered.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM