DIAGNOSIS SYSTEM (TCM)TM-247
< SYSTEM DESCRIPTION > [CVT: RE0F10E]
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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-250
< SYSTEM DESCRIPTION >[CVT: RE0F10E]
DIAGNOSIS SYSTEM (TCM)
*: Not applicable but displayed.
WORK SUPPORT
Engine brake adjustment
Check the degradation level of the CVT fluid.
ACTIVE TEST
NORMAL MODE* (On/Off) D
isplays whether it is the NORMAL mode.
SPORT MODE* (On/Off) Displays whether it is the SPORT mode.
AIR BLDING STATE* (INCOMP/
COMP) Displays the status of “E
LECTRIC O.P. AIR BLEEDING”
in “Work Support”.
ELECTRIC OP DUTY* (%) Displays the command signal value (duty) of the electric
oil pump transmitted from TCM.
E-OP DUTY MON* (%) Monitors the status signal value (duty) transmitted from
the electric oil pump and displays the monitored value.
ELECTRIC OP RELAY* (On/Off) Displays the command status from TCM to the electric oil
pump relay.
E-OP RELAY MON* (On/Off) Monitors the command status from TCM to the oil pump
relay and displays the monitored value.
Monitored item (Unit)
Monitor item selection
Remarks
ECU IN-
PUT SIG-
NALS MAIN SIG-
NALS
Item name Description
CONFORM CVTF DETERIORTN Checks the degradation level of the CVT fluid under severe conditions.
ERASE MEMORY DATA Performs “erasing of the calibration data” and “erasing of the learned value” at the
same time.
G SENSOR CALIBRATION Compensates the G sensor.
ERASE LEARNING VALUE Erases lear ning value memorized by TCM.
ENGINE BRAKE ADJ. Although there is no malfunction on the transaxle and the CVT system, if a cus-
tomer make a complaint like “I do not feel comfortable with automatic operation of
the engine brake on downhill”, the engine brake may be cancelled with “engine
brake adjustment”.
ERASE CALIBRATION DATA Erases cali bration data memorized by TCM.
WRITE IP CHARA - REPLACEMENT AT/CVT Writes IP characteristics when transaxle assembly is replaced.
READ IP CHARA - REPLACEMENT TCM Reads IP characteristics when TCM is replaced.
WRITE IP CHARA - REPLACEMENT TCM Writes IP characteristics when TCM is replaced.
ENGINE BRAKE LEVEL
ON : Turn ON the engine brake control.
OFF : Turn OFF the engine brake control.
CVTF degradation level data
210,000 or more : Replacement of the CVT fluid is required.
Less than 210,000 : Replacement of the CVT fluid is not required.
Item name Description
CVT OIL COOLER FAN CIRCUIT Checks the operation of CVT oil cooler fan relay.
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
CVT FLUIDTM-285
< BASIC INSPECTION > [CVT: RE0F10E]
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CVT FLUID
ReplacementINFOID:0000000009464231
CAUTION:
• Always use shop paper. Never use shop cloth.
• Replace a drain plug gasket with new ones at the fi nal stage of the operation when installing.
• Use caution when looking into the drain hole as there is a risk of dripping fluid entering the eye.
• After replacement, always pe rform CVT fluid leakage check.
1. Select “Data Monitor” in “TRANSMISSION” using CONSULT.
2. Select “FLUID TEMP” and confirm t hat the CVT fluid temperature is 40°C (104 °F) or less.
3. Check that the selector lever is in the “P ” position, then completely engage the parking brake.
4. Lift up the vehicle.
5. Remove the drain plug and drain the CVT fluid from the oil pan. Refer to TM-387, "Exploded View"
.
6. Install the drain plug to oil pan. CAUTION:
Drain plug gasket use the old one.
7. Remove the overflow plug from converter housing.
8. Install the charging pipe set (KV311039S0) (A) into the overflow plug hole.
CAUTION:
Tighten the charging pipe by hand.
9. Install the ATF changer hose (B) to the charging pipe. CAUTION:
Press the ATF changer hose all the way onto the charging
pipe until it stops.
10. Fill approximately 3 liter (2-5 /8 lmp qt) of the CVT fluid.
11. Remove the ATF changer hose and charging pipe, then install the overflow plug.
NOTE:
Perform this work quickly because CVT fluid leaks.
12. Lift down the vehicle.
13. Start the engine.
14. While depressing the brake pedal, shift the selector leve r to the entire position from “P” to “DS”, and shift it
to the “P” position.
NOTE:
Hold the lever at each position for 5 seconds.
15. Check that the CONSULT “Data Monitor” in “FLUID TEMP” is 35°C (95 °F) to 45 °C (113 °F).
16. Stop the engine.
17. Lift up the vehicle.
18. Remove the drain plug, and then drain CVT fluid from oil pan. CVT fluid : Refer to
TM-413, "General Specification"
.
Fluid capacity : Refer to TM-413, "General Specification"
.
JSDIA3714ZZ
JSDIA3713ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TM-286
< BASIC INSPECTION >[CVT: RE0F10E]
CVT FLUID
19. Repeat steps 8 to 18 (one time).
20. Tighten the drain plug to the specified torque. Refer to TM-387, "Exploded View"
.
21. Remove the overflow plug.
22. Install the charging pipe set (KV311039S0) into the overflow plug hole. CAUTION:
Tighten the charging pipe by hand.
23. Install the ATF changer hose to the charging pipe. CAUTION:
Press the ATF changer hose all the way onto the charging pipe until it stops.
24. Fill approximately 3 liter (2-5/8 lmp qt) of the CVT fluid.
25. Remove the ATF changer hose and charging pipe, then install the overflow plug. NOTE:
Perform this work quickly because CVT fluid leaks.
26. Lift down the vehicle.
27. Start the engine.
28. While depressing the brake pedal, shift the selector lever to the entire position from “P” to “DS”, and shift it to the “P” position.
NOTE:
Hold the lever at each position for 5 seconds.
29. Check that the CONSULT “Data Monitor” in “FLUID TEMP” is 35 °C (95 °F) to 45 °C (113 °F).
30. Lift up the vehicle.
31. Remove the overflow plug and confirm that the CV T fluid is drained from the overflow plug hole.
CAUTION:
Perform this work with the vehicle idling.
NOTE:
If the CVT fluid is not drained, refer to “Adjustment” and refill with the CVT fluid.
32. When the flow of CVT fluid slows to a drip, tighten the overflow plug to the specified torque. Refer to TM-
387, "Exploded View".
CAUTION:
Never reuse O-ring.
33. Lift down the vehicle.
34. Select “Data Monitor” in “T RANSMISSION” using CONSULT.
35. Select “CONFORM CVTF DETERIORTN”.
36. Select “Erase”.
37. Stop the engine.
AdjustmentINFOID:0000000009464232
CAUTION:
• During adjustment of the CVT fluid level, check CO NSULT so that the oil temperature may be main-
tained from 35 to 45 °C (95 to 113 °F).
• During adjustment of the CVT fluid level, check that the engine speed is maintaining 500 rpm.
• Use caution when looking into the drain hole as th ere is a risk of dripping fluid entering the eye.
1. Check that the selector lever is in the “P ” position, then completely engage the parking brake.
2. Start the engine.
3. Adjust the CVT fluid temperature to be approximately 40 °C (104 °F).
NOTE:
The CVT fluid is largely affected by temperature. Therefore be sure to use CONSULT and check the
“FLUID TEMP” under “TRANSMISSION” in “Data Monitor” while adjusting.
4. While depressing the brake pedal, shift the selector lever to the entire position from “P” to “DS”, and shift it to the “P” position.
NOTE: CVT fluid : Refer to
TM-413, "General Specification"
.
Fluid capacity : Refer to TM-413, "General Specification"
.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TM-288
< BASIC INSPECTION >[CVT: RE0F10E]
STALL TEST
STALL TEST
Work ProcedureINFOID:0000000009464233
INSPECTION
1. Check the engine oil level. Replenish if necessary. Refer to
LU-25, "Inspection".
2. Check for leak of the CVT fluid. Refer to TM-377, "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 sh ift the selector lever to “D” position.
6. While depressing the brake pedal, depress the accelerator pedal gradually.
7. Read the stall speed quickly and release your foot from the accelerator pedal quickly. CAUTION:
Do not depress the accelerator pedal for 5 seconds or more during the test.
8. Shift the selector lever to “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-413, "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
• Chain belt
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TM-376
< SYMPTOM DIAGNOSIS >[CVT: RE0F10E]
CVT CONTROL SYSTEM
OtherNo creep at all. 1 6 2 4 5 3
Vehicle cannot run in all posi-
tions. 1 2453 6
With selector lever in D position,
driving is not possible. 12435
With selector lever in R position,
driving is not possible. 12435
Judder occurs during lock-up. 1
Strange noise in D position. 1 2 4 3 5
Strange noise in R position. 1 2 4 3
Strange noise in N position. 1 2 3
Maximum speed low. 1 5 2 4 3
With selector lever in P position,
vehicle does not enter parking
condition or, with selector lever in
another position, parking condi-
tion is not cancelled. 1
Vehicle runs with CVT in P posi-
tion. 21
Vehicle runs with CVT in N posi-
tion. 231
Engine stall. 1
Engine stalls when selector lever
shifted N → D or R. 1
When brake pedal is depressed
with ignition switch ON, selector-
lever cannot be shifted from P po-
sition to other position. 123
When brake pedal is not de-
pressed with ignition switch ON,
selector lever can be shifted from
P position to other position. 123
Symptom
Torque converter
Transmission range switch
Oil pump
Forward clutch
Reverse brake
Planetary gear
Bearings
Parking mechanism
Stop lamp switch
Shift lock solenoid
CVT shift selector
TM-410
TM-407BR-13TM-369TM-378
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TM-400
< REMOVAL AND INSTALLATION >[CVT: RE0F10E]
CVT OIL WARMER SYSTEM
CVT OIL WARMER SYSTEM
WATER HOSE
WATER HOSE : Exploded ViewINFOID:0000000009464359
WATER HOSE : Removal and InstallationINFOID:0000000009464360
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 clot h around the cap. Slowly turn it 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.
NOTE:
When removing components such as hoses, tubes/lines, etc. , cap or plug openings to prevent fluid from spill-
ing.
1. Remove front under cover. Refer to EXT-28, "Removal and Installation"
.
Hose clamp CVT water hose A CVT oil warmer
CVT water hose B Heater thermostat CVT water hose C
Transaxle assembly
Water outlet
: Always replace after every disassembly.
: N·m (kg-m, ft-lb)
JSDIA3630GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM