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-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
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
SYSTEMTM-241
< SYSTEM DESCRIPTION > [CVT: RE0F10E]
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DESCRIPTION
• Controls for improvement of the transmission effici ency by engaging the torque converter clutch in the
torque converter and eliminating slip of the converter. Achieves comfortable driving with slip control of the
torque converter clutch.
• The oil pressure feed circuit for the torque converter clutch piston chamber is connected to the torque con-
verter clutch control valve. The torque converter clut ch control valve is switched by the torque converter
clutch solenoid valve with the signal from TCM. This contro ls the oil pressure circuit, which is supplied to the
torque converter clutch piston chamber, to the release side or engagement side.
• If the CVT fluid temperature is low or the vehicle is in fail-safe mode due to malfunction, lock-up control is
prohibited.
Lock-up engagement
In lock-up engagement, the torque converter clutch solenoi d valve makes the torque converter clutch control
valve locked up to generate the lock-up apply pressure. This pushes the torque converter clutch piston for
engagement.
Lock-up release condition
In lock-up release, the torque converter clutch solenoi d valve makes the torque converter clutch control valve
non-locked up to drain the lock-up apply pressure. This does not engage the torque converter clutch piston.
JSDIA3717GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TCM
TM-261
< ECU DIAGNOSIS INFORMATION > [CVT: RE0F10E]
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Protection Control INFOID:0000000009464220
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
P2765 •Start is slow
• Acceleration is slow
• Lock-up is not performed —
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 return 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 return condi-
tion Torque returns to normal by positioning the sele
ctor lever in a range other than “R” position.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TCM
TM-263
< ECU DIAGNOSIS INFORMATION > [CVT: RE0F10E]
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DTC IndexINFOID:0000000009464222
NOTE:
• If multiple malfunction codes are detected at the same time, check each code according to the “DTC check
priority list”. Refer to TM-262, "DTC Inspection Priority Chart"
.
• The ignition counter is displayed in “FFD”. Refer to TM-245, "CONSULT Function"
.
3P062F EEPROM
TM-298, "DTC Logic"
P0705 T/M RANGE SENSOR ATM-299, "DTC Logic"
P0706 T/M RANGE SENSOR ATM-305, "DTC Logic"
P0711 FLUID TEMP SENSOR ATM-308, "DTC Logic"
P0712 FLUID TEMP SENSOR ATM-312, "DTC Logic"
P0713 FLUID TEMP SENSOR ATM-314, "DTC Logic"
P0715 INPUT SPEED SENSOR ATM-316, "DTC Logic"
P0717 INPUT SPEED SENSOR ATM-319, "DTC Logic"
P0841 FLUID PRESS SEN/SW ATM-336, "DTC Logic"
P0847 FLUID PRESS SEN/SW BTM-337, "DTC Logic"
P0848 FLUID PRESS SEN/SW BTM-339, "DTC Logic"
P084C FLUID PRESS SEN/SW HTM-341, "DTC Logic"
P084D FLUID PRESS SEN/SW HTM-343, "DTC Logic"
P0890 TCMTM-346, "DTC Logic"
P2765 INPUT SPEED SENSOR BTM-357, "DTC Logic"
4P0744 TORQUE CONVERTER
TM-326, "DTC Logic"
P0746 PC SOLENOID ATM-328, "DTC Logic"
P0776 PC SOLENOID BTM-330, "DTC Logic"
P0965 PC SOLENOID BTM-351, "DTC Logic"
P2813 SELECT SOLENOIDTM-360, "DTC Logic"
Priority DTC (Diagnostic Trouble Code) Reference
DTC*1, *2
Items
(CONSULT screen terms) Trip
MIL*3Reference
GST CONSULT
(TRANSMISSION)
P062F P062F EEPROM 1 ON TM-298
P0705 P0705 T/M RANGE SENSOR A 2 ONTM-299
P0706 P0706 T/M RANGE SENSOR A 2 ONTM-305
P0711 P0711 FLUID TEMP SENSOR A 2 ONTM-308
P0712 P0712 FLUID TEMP SENSOR A 2 ON TM-312
P0713 P0713 FLUID TEMP SENSOR A 2 ONTM-314
P0715 P0715 INPUT SPEED SENSOR A 2 ONTM-316
P0717 P0717 INPUT SPEED SENSOR A 2 ONTM-319
P0740 P0740 TORQUE CONVERTER 2 ONTM-322
P0743 P0743 TORQUE CONVERTER 2 ONTM-324
P0744 P0744 TORQUE CONVERTER 2 ONTM-326
P0746 P0746 PC SOLENOID A 2 ONTM-328
P0776 P0776 PC SOLENOID B 2 ONTM-330
P0778 P0778 PC SOLENOID B 2 ONTM-332
P0779 P0779 PC SOLENOID B 2 ONTM-334
P0841 P0841 FLUID PRESS SEN/SW A 2 ONTM-336
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TM-264
< ECU DIAGNOSIS INFORMATION >[CVT: RE0F10E]
TCM
*1: These numbers are specif
ied by SAE J2012/ISO 15031-6.
*2: The DTC number of the 1st trip is the same as the DTC number.
*3: Refer to TM-243, "DIAGNOSIS DE SCRIPTION : Malfunction Indicator Lamp (MIL)"
.
P0847 P0847 FLUID PRESS SEN/SW B 2 ON TM-337
P0848 P0848 FLUID PRESS SEN/SW B 2 ONTM-339
P084C P084C FLUID PRESS SEN/SW H 2 ON TM-341
P084D P084D FLUID PRESS SEN/SW H 2 ONTM-343
P0863 P0863 CONTROL UNIT (CAN) 1 ONTM-345
P0890 P0890 TCM 1 ONTM-346
P0962 P0962 PC SOLENOID A 2 ONTM-347
P0963 P0963 PC SOLENOID A 2 ONTM-349
P0965 P0965 PC SOLENOID B 2 ONTM-351
P0966 P0966 PC SOLENOID B 2 ONTM-353
P0967 P0967 PC SOLENOID B 2 ONTM-355
P2765 P2765 INPUT SPEED SENSOR B 2 ONTM-357
P2813 P2813 SELECT SOLENOID 2 ONTM-360
P2814 P2814 SELECT SOLENOID 2 ONTM-362
P2815 P2815 SELECT SOLENOID 2 ONTM-364
U0073 U0073 COMM BUS A OFF 1 ON TM-290
U0100 U0100 LOST COMM (ECM A) 1 ONTM-291
— U0140 LOST COMM (BCM) 1 —TM-292
— U0141 LOST COMM (BCM A) 1 —TM-293
— U0155 LOST COMM (IPC) 1 —TM-294
— U0300 CAN COMM DATA 1 —TM-295
— U1000 CAN COMM CIRC 1 —TM-296
— U1117 LOST COMM (ABS) 1 —TM-297
DTC*1, *2Items
(CONSULT screen terms) Trip
MIL*3Reference
GST CONSULT
(TRANSMISSION)
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM