2014 NISSAN TEANA clutch

SYSTEMTM-31
< SYSTEM DESCRIPTION > [CVT: RE0F10D]
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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:0000000009463988
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 ×××××
Overdrive control switch
(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) ×
O/D OFF indicator lamp
(CAN communication) ×
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SYSTEMTM-39
< SYSTEM DESCRIPTION > [CVT: RE0F10D]
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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.
JSDIA3783GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM (TCM)TM-45
< SYSTEM DESCRIPTION > [CVT: RE0F10D]
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SEC REV SENSOR (rpm) ×Displays the secondary pulley speed calculated from the
pulse signal of the output speed sensor.
ENG SPEED SIG (rpm) ×Displays the engine speed received through CAN com-
munication.
SEC PRESSURE SEN (V) ×Displays the signal voltage of the secondary pressure-
sensor.
PRI PRESSURE SEN (V) ×Displays the signal voltage of the primary pressuresen-
sor.
ATF TEMP SEN (V) ×Displays the signal voltage of the CVT fluid temperature
sensor.
G SENSOR* (G) ×Displays the signal voltage of the G sensor.
VIGN SEN (V) ×Displays the battery voltage applied to TCM.
PVING VOLT (V) ×Displays the backup voltage of TCM.
VEHICLE SPEED (km/h or mph) ×Displays the vehicle speed recognized by TCM.
INPUT REV (rpm) Displays the input shaft speed of CVT recognized by
TCM.
PRI SPEED (rpm) ×Displays the primary pulley speed recognized by TCM.
SEC SPEED (rpm) Displays the secondary pulley speed recognized by
TCM.
ENG SPEED (rpm) ×Displays the engine speed recognized by TCM.
SLIP REV (rpm) ×Displays the speed difference between the input shaft
speed of CVT and the engine speed.
PULLEY GEAR RATIO ×Displays the pulley gear ratio calculated from primary
pulley speed/secondary pulley speed.
G SPEED* (G) Displays the acceleration and deceleration speed of the
vehicle calculated from vehicle speed change.
ACCEL POSI SEN 1 (deg) ××Displays the estimated throttle position received through
CAN communication.
VENG TRQ (Nm) ×Display the engine torque recognized by TCM.
PRI TRQ (Nm) Display the input shaft torque of CVT.
TRQ RTO Display the torque ratio of torque converter.
SEC PRESSURE (MPa) Displays the secondary pressure calculated from the sig-
nal voltage of the secondary pressure sensor.
PRI PRESSURE (MPa) Displays the primary pressure calculated from the signal
voltage of the primary pressure sensor.
FLUID TEMP ( °C or °F) ×Displays the CVT fluid temperature calculated from the
signal voltage of the CVT fluid temperature sensor.
DSR REV (rpm) Displays the target primary pulley speed calculated from
processing of gear shift control.
TGT PLLY GR RATIO Displays the target gear ratio of the pulley from process-
ing of gear shift control.
LU PRS (MPa) Displays the target oil pressure of the torque converter
clutch solenoid valve calculated from oil pressure pro-
cessing of gear shift control.
LINE PRS (MPa) Displays the target oil pressure of the line pressure sole-
noid valve calculated from oil pressure processing of
gear shift control.
Monitored item (Unit)
Monitor item selection
Remarks
ECU IN-
PUT SIG-
NALS MAIN SIG-
NALS
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

TM-46
< SYSTEM DESCRIPTION >[CVT: RE0F10D]
DIAGNOSIS SYSTEM (TCM)
TRGT PRI PRESSURE (MPa)Displays the target oil pressure of the primary pressure
solenoid valve calculated from oil pressure processing of
gear shift control.
TRGT SELECT PRESSURE (MPa) Displays the target oil pressure of the select solenoid
valve calculated from oil pressure processing of gear
shift control.
TRGT SEC PRESSURE (MPa) Displays the target oil pressure of the secondary pres-
sure solenoid valve calculated from oil pressure process-
ing of gear shift control.
ISOLT1 (A) ×Displays the command current from TCM to the torque
converter clutch solenoid valve.
ISOLT2 (A) ×Displays the command current from TCM to the line
pressure solenoid valve.
PRI SOLENOID (A) ×Displays the command current from TCM to the primary
pressure solenoid valve.
SEC SOLENOID CURRENT (A) ×Displays the command current from TCM to the second-
ary pressure solenoid valve.
SELECT SOLENOID CUR-
RENT (A)
×Displays the command current from TCM to the select
solenoid valve.
SOLMON1 (A) ××Monitors the command current from TCM to the torque
converter clutch solenoid valve and displays the moni-
tored value.
SOLMON2 (A) ××Monitors the command current from TCM to the line
pressure solenoid valve and displays the monitored val-
ue.
PRI SOL MON (A) ××Monitors the command current from TCM to the primary
pressure solenoid valve and displays the monitored val-
ue.
SEC SOL MON CURRENT (A) ××Monitors the command current from TCM to the second-
ary pressure solenoid valve and displays the monitored
value.
SELECT SOL MON CURRENT (A) ××Monitors the command current from TCM to the select
solenoid valve and displays the monitored value.
D POSITION SW (On/Off) ×Displays the operation status of the transmission range
switch (D position).
N POSITION SW (On/Off) ×Displays the operation status of the transmission range
switch (N position).
R POSITION SW (On/Off) ×Displays the operation status of the transmission range
switch (R position).
P POSITION SW (On/Off) ×Displays the operation status of the transmission range
switch (P position).
L POSITION SW* (On/Off) ×Displays the operation status of the transmission range
switch (L position).
DS RANGE SW (On/Off) ×Displays the operation status of the transmission range
switch (Ds position).
BRAKESW (On/Off) ××Displays the reception status of the stop lamp switch sig-
nal received through CAN communication.
IDLE SW (On/Off) ××Displays the reception status of the closed throttle posi-
tion signal received through CAN communication.
SPORT MODE SW (On/Off) ××Displays the reception status of the overdrive control
switch signal received through CAN communication.
Monitored item (Unit)
Monitor item selection
Remarks
ECU IN-
PUT SIG-
NALS MAIN SIG-
NALS
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

TCM
TM-55
< ECU DIAGNOSIS INFORMATION > [CVT: RE0F10D]
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(Y) Ground
Select solenoid
valve OutputIn driving at “DS” position
Release the accelerator pedal after
the following conditions are satisfied
• Selector lever: “D” position
• Accelerator pedal position: 1/8 or less
• Vehicle speed: 50 km/h (31 MPH) or more
38
(BR) Ground Torque converter
clutch solenoid
valve Output• Selector lever: “D” position
• Accelerator pedal position: 1/8 or
less
• Vehicle speed: 20 km/h (12 MPH) or more
• Engine started
• Vehicle is stopped
39
(L) Ground Secondary pres-
sure solenoid valve Output• Selector lever: “DS” position
• Vehicle speed: 20 km/h (12 MPH)
40
(LG) Ground
Primary pressure
solenoid valve Output
• Selector lever: “DS” position
• Vehicle speed: 20 km/h (12 MPH)
41
(B) Ground Ground Output Always 0 V
42
(B) Ground Ground Output Always 0 V
45
(P) Ground
Battery power sup-
ply (backup) Input Always 10
− 16 V
Te r m i n a l N o .
(Wire color) Description
Condition Value (Approx.)
+ − Signal Input/
OutputJSDIA1897GB
JSDIA1899GB
JSDIA1900GB
JSDIA1903GB
JSDIA1897GB
JSDIA1897GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

TM-86
< BASIC INSPECTION >[CVT: RE0F10D]
STALL TEST
STALL TEST
Work ProcedureINFOID:0000000009464016
INSPECTION
1. Check the engine oil level. Replenish if necessary. Refer to
LU-9, "Inspection".
2. Check for leak of the CVT fluid. Refer to TM-178, "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 for 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-212, "Stall Speed".
Selector lever position
Possible cause
DR
Stal l s pe ed HO•Forward clutch
O H • Reverse brake
LL •Engine
• Torque converter one way clutch
HH • Line pressure is low.
• Primary pulley
• Secondary pulley
• Steel belt
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

TM-120
< DTC/CIRCUIT DIAGNOSIS >[CVT: RE0F10D]
P0740 TORQUE CONVERTER
P0740 TORQUE CONVERTER
DTC LogicINFOID:0000000009464059
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Be careful of the driving speed.
1.PREPARATION BEFORE WORK
If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.
>> GO TO 2.
2.PREPARATION BEFORE OPERATION
With CONSULT
1. Start the engine.
2. Select “Data Monitor” in “TRANSMISSION”.
3. Select “FLUID TEMP”.
4. Confirm that the CVT fluid temper ature is in the following range.
With GST
1. Start the engine.
2. Set the CVT fluid to 20 °C (68 °F) or more.
NOTE:
When the ambient temperature is 20 °C (68 °F), the CVT fluid usually increases to 50 to 80 °C (122 to
176 °F) with driving in an urban area for approximately 10 minutes.
Is the CVT fluid 20
°C (68°F) or more?
YES >> GO TO 3.
NO >> 1. Warm the transaxle. 2. GO TO 3.
3.CHECK DTC DETECTION
1. Drive the vehicle.
2. Maintain the following conditions for 10 seconds or more.
3. Stop the vehicle.
4. Check the first trip DTC.
Is
“P0740” detected?
YES >> Go to TM-121, "Diagnosis Procedure".
NO >> INSPECTION END
DTC CONSULT screen terms
(Trouble diagnosis content) DTC detection condition Possible causes
P0740 TORQUE CONVERTER
(Torque Converter Clutch Cir-
cuit/Open) When all of the following conditions are satis-
fied and this state is maintained for 5 seconds:
• TCM power supply voltage: More than 11 V
• P0743 is not detected.
• TCM judges that solenoid valve circuit is open. • Harness or connector
(Torque converter clutch solenoid valve
circuit is open or shorted to power sup-
ply)
• Torque converter clutch solenoid valve
FLUID TEMP : 20 °C (68 °F) or more
Selector lever : “D” position
Vehicle speed : 40 km/h (25 MPH) or more
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

P0740 TORQUE CONVERTERTM-121
< DTC/CIRCUIT DIAGNOSIS > [CVT: RE0F10D]
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Diagnosis ProcedureINFOID:0000000009464060
1.CHECK CIRCUIT BETWEE N TCM AND CVT UNIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector and CVT unit connector.
3. Check continuity between TCM harness connector terminal and CVT unit harness connector terminal.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace malfunctioning parts.
2.CHECK CIRCUIT BETWEEN CVT UNIT AND GROUND
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> GO TO 3.
3.CHECK CIRCUIT BETW EEN CVT UNIT AND CONTROL VALVE
1. Disconnect control valve connector. Refer to TM-186, "Exploded View"
.
2. Check continuity between CVT unit harness connecto r terminal and control valve harness connector ter-
minal.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace terminal code assembly. Refer to TM-186, "Exploded View"
.
4.CHECK CIRCUIT BETWEEN CONTROL VALVE AND GROUND
Check resistance between control valve harness connector terminal and ground.
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI-43, "Intermittent Incident".
NO >> There is malfunction of torque converter clutch solenoid valve. Replace transaxle assembly. Refer
to TM-206, "Removal and Installation"
.
TCM CVT unit
Continuity
Connector Terminal Connector Terminal
F1638F46 2Existed
CVT unit — Condition Resistance
Connector Terminal
F209 2 Ground CVT fluid temperature: 20
°C (68 °F) 5.5 – 7.0 Ω
CVT fluid temperature: 50 °C (122 °F) 6.0 – 8.0 Ω
CVT fluid temperature: 80 °C (176 °F) 6.5 – 8.5 Ω
CVT unit Control valve
Continuity
Connector Terminal Connector Terminal
F2092F2073Existed
Control valve — Condition Resistance
Te r m i n a l
3Ground CVT fluid temperature: 20
°C (68 °F) 5.5 – 7.0 Ω
CVT fluid temperature: 50 °C (122 °F) 6.0 – 8.0 Ω
CVT fluid temperature: 80 °C (176 °F) 6.5 – 8.5 Ω
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM