TM-48
< SYSTEM DESCRIPTION >[CVT: RE0F10D]
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-49
< ECU DIAGNOSIS INFORMATION > [CVT: RE0F10D]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
ECU DIAGNOSIS INFORMATION
TCM
Reference ValueINFOID:0000000009464001
CONSULT DATA MONITOR STANDARD VALUE
• In CONSULT, electric shift timing or lock-up timing, i. e. operation timing of each solenoid valve, is displayed.
Therefore, if there is an obvious difference between t he shift timing estimated from a shift shock (or engine
speed variations) and that shown on the CONSULT, the mechanism parts (including the hydraulic circuit)
excluding the solenoids and sensors may be malfunctioning. In this case, check the mechanical parts follow-
ing the appropriate diagnosis procedure.
• Shift point (gear position) displayed on CONSULT slight ly differs from shift pattern described in Service Man-
ual. This is due to the following reasons.
- Actual shift pattern may vary slightly within specified tolerances.
- While shift pattern described in Service Manual indica tes start of each shift, CONSULT shows gear position
at end of shift.
- The solenoid display (ON/OFF) on CONSULT is changed at the start of gear shifting. In contrast, the gear
position display is changed at the time when gear shif ting calculated in the control unit is completed.
NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.
Monitor item Condition Value/Status (Approx.)
VSP SENSOR While driving Almost same as the speedometer display.
ESTM VSP SIG While driving Almost same as the speedometer display.
INPUT SPEED SENSOR In driving (lock-up ON) Ap proximately matches the engine speed.
PRI SPEED SEN In driving (lock-up ON) Approximately matches the engine speed.
SEC REV SENSOR While driving VSP SENSOR × 40
ENG SPEED SIG Engine ru nning Almost same reading as tachometer
SEC PRESSURE SEN • After engine warm up
• Selector lever: “N” position
• At idle 1.2 – 1.3 V
PRI PRESSURE SEN • After engine warm up
• Selector lever: “N” position
• At idle 0.70 – 0.85 V
ATF TEMP SEN CVT fluid: Approx. 20
°C (68 °F) 2.01 – 2.05 V
CVT fluid: Approx. 50 °C (122 °F) 1.45 – 1.50 V
CVT fluid: Approx. 80 °C (176 °F) 0.90 – 0.94 V
G SENSOR Vehicle is level 0 V
VIGN SEN Ignition switch: ON 10 – 16 V
PVING VOLT Ignition switch: ON 10 – 16 V
VEHICLE SPEED While driving Almost sa me as the speedometer display.
INPUT REV In driving (lock-up ON) Almost same as the engine speed.
PRI SPEED In driving (lock-up ON) Approximately matches the engine speed.
SEC SPEED While driving VSP SENSOR × 40
ENG SPEED Engine running Almost same reading as tachometer
SLIP REV While driving Engine speed − Input speed
PULLEY GEAR RATIO In driving (forward) 2.70
− 0.38
In driving (reverse) 2.70
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TM-56
< ECU DIAGNOSIS INFORMATION >[CVT: RE0F10D]
TCM
Fail-safe
INFOID:0000000009464002
TCM has a fail-safe mode. The mode functions so that operation can be continued even if the signal circuit of
the main electronically contro lled 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-sa fe mode. At this time, check the DTC code and perform
inspection and repair according to the malfunction diagnosis procedures.
Fail-safe function
46
(P) Ground
Battery power sup-
ply (backup) Input Always 10
− 16 V
47
(Y) Ground Ignition power sup-
ply InputIgnition switch: ON 10
− 16 V
Ignition switch: OFF 0 V
48
(Y) Ground Ignition power sup-
ply InputIgnition switch: ON 10
− 16 V
Ignition switch: OFF 0 V
Te r m i n a l N o .
(Wire color) Description
Condition Value (Approx.)
+ − Signal Input/
Output
DTC Vehicle behavior Conditions of vehicle
P062F • Not changed from normal driving —
P0705 • Shift position indicator on combination meter is not dis-
played
• Selector shock is large
•Start is slow
• Acceleration is slow
• Lock-up is not performed —
P0706 • Shift position indicator on combination meter is not dis-
played
• Selector shock is large
•Start is slow
• Acceleration is slow
• Lock-up is not performed —
P0711 •Start is slow
• Acceleration is slow Engine coolant temperature when engine start:
Te m p . ≥ 10 °C (50 °F)
• Selector shock is large
•Start is slow
• Acceleration is slow Engine coolant temperature when engine start:
− 35 °C ( −31 °F) ≤ Temp. < 10 °C (50 °F)
• Selector shock is large
•Start is slow
• Acceleration is slow Engine coolant temperature when engine star:
Te m p . < −35 °C ( −31 °F)
P0712 •Start is slow
• Acceleration is slow Engine coolant temperature when engine start:
Te m p . ≥ 10 °C (50 °F)
• Selector shock is large
•Start is slow
• Acceleration is slow Engine coolant temperature when engine start:
− 35 °C ( −31 °F) ≤ Temp. < 10 °C (50 °F)
• Selector shock is large
•Start is slow
• Acceleration is slow Engine coolant temperature when engine star:
Te m p . < −35 °C ( −31 °F)
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TCM
TM-59
< ECU DIAGNOSIS INFORMATION > [CVT: RE0F10D]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
Protection Control INFOID:0000000009464003
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
REVERSE PROHIBIT CONTROL
DTC Inspection Priority ChartINFOID:0000000009464004
If multiple malfunction codes are detected at the same time, check each code according to the DTC check pri-
ority list below.
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.
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 return condi-
tion The control returns to the normal control when CVT fluid temperature is lowered.
ControlThe reverse brake is controlled to avoid becoming engaged when the selector lever is set in “R” position while
driving in forward direction at more than the specified speed.
Vehicle behavior in
control If the selector lever is put at “R” position when driving with the forward gear, the gear becomes neutral, not
reverse.
Normal return condi-
tion The control returns to normal control when the vehicle is driven at low speeds. (The reverse brake becomes
engaged.)
Priority DTC (Diagnostic Trouble Code) Reference
1 P0863 CONTROL UNIT (CAN)
TM-143, "DTC Logic"
U0073 COMM BUS A OFF TM-88, "DTC Logic"
U0100 LOST COMM (ECM A)TM-89, "DTC Logic"
U0140 LOST COMM (BCM)TM-90, "DTC Logic"
U0141 LOST COMM (BCM A)TM-91, "DTC Logic"
U0155 LOST COMM (IPC)TM-92, "DTC Logic"
U0300 CAN COMM DATA TM-93, "DTC Logic"
U1000 CAN COMM CIRCTM-94, "DTC Logic"
U1117 LOST COMM (ABS)TM-95, "DTC Logic"
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TM-78
< BASIC INSPECTION >[CVT: RE0F10D]
DIAGNOSIS AND REPAIR WORK FLOW
Use
TM-174, "Symptom Table" from the symptom inspection result in step 4. Then identify where to start per-
forming the diagnosis based on possible causes and symptoms.
>> GO TO 8.
7.REPAIR OR REPLACE THE MALFUNCTIONING PARTS
Repair or replace the detected malfunctioning parts.
Reconnect parts or connector after repairing or replacing, and then erase DTC if necessary.
>> GO TO 8.
8.FINAL CHECK
Perform “DTC CONFIRMATION PROCEDURE” again to make sure that the repair is correctly performed.
Check that malfunctions are not reproduced when obtaini ng the malfunction information from the customer,
referring to the symptom inspection result in step 3 or 4.
Is DTC or malfunction symptom reproduced?
YES-1 (DTC is reproduced.)>>GO TO 5.
YES-2 (Malfunction is reproduced.)>>GO TO 6.
NO >> Before delivering the vehicle to the customer, make sure that DTC is erased.
Question sheetINFOID:0000000009464009
DESCRIPTION
There are many operating conditions that may cause a malfunction
of the transmission parts. By understanding those conditions prop-
erly, a quick and exact diagnosis can be achieved.
In general, perception of a problem varies depending on individuals.
Ask the customer about his/her concer ns carefully. It is important to
understand the phenomenon or status. To systemize all the informa-
tion for the diagnosis, prepare the question sheet referring to the
question points.
In some cases, multiple conditions that appear simultaneously may
cause a DTC to be detected.
Worksheet Sample
SEF907L
Question sheet
Customer's
name MR/MSRegistration
number Initial year
registration Ye a r M o n t h
day
Vehicle type Chassis No.
Storage date Year Month
dayEngine Mileage km/mile
Symptom † Vehicle does not start. ( † R position † D position † DS position † M position)
† Upshifting does not occur. † Downshifting does not occur.
† Lock-up malfunction
† Shift point is too high. † Shift point is too low.
† Shift shock ( † N ⇒D † Lock-up † R, D, DS and M position)
† Slip ( † N ⇒D † Lock-up † R, D, DS and M position)
† Noise † Vibration
When selector lever position is shifted, shift pattern does not change.
† Other
( )
First occurrence † Recently (as from month of year )
Frequency of occurrence † Always † Under certain conditions † Sometimes ( time(s)/day)
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
CVT FLUIDTM-83
< BASIC INSPECTION > [CVT: RE0F10D]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
CVT FLUID
ReplacementINFOID:0000000009464014
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-186, "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-212, "General Specification"
.
Fluid capacity : Refer to TM-212, "General Specification"
.
JSDIA3714ZZ
JSDIA3713ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
TM-84
< BASIC INSPECTION >[CVT: RE0F10D]
CVT FLUID
19. Repeat steps 8 to 18 (one time).
20. Tighten the drain plug to the specified torque. Refer to TM-186, "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-
186, "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:0000000009464015
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-212, "General Specification"
.
Fluid capacity : Refer to TM-212, "General Specification"
.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM
CVT FLUIDTM-85
< BASIC INSPECTION > [CVT: RE0F10D]
C
EF
G H
I
J
K L
M A
B
TM
N
O P
Hold the lever at each position for 5 seconds.
5. Lift up the vehicle.
6. Check that there is no CVT fluid leakage.
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 0.5 liter (1 /2 lmp qt) of the CVT fluid.
11. Remove the ATF changer hose from the charging pipe, and check that the CVT fluid drains out from the charging pipe. If it
does not drain out, perform charging again.
CAUTION:
Perform this work with the vehicle idling.
12. When the flow of CVT fluid slows to a drip, re move the charging pipe from the converter housing.
13. Tighten the overflow plug to the specified torque. Refer to TM-186, "Exploded View"
.
CAUTION:
Never reuse O-ring.
14. Lift down the vehicle.
15. Stop the engine.
JSDIA3714ZZ
JSDIA3713ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM