2010 NISSAN LATIO Service Repair Manual

oil temperature lumbar support belt timing belt transmission fluid child seat

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NISSAN LATIO 2010 Service Repair Manual CVT-80
< SERVICE INFORMATION >[RE0F08B]
P0720 OUTPUT SPEED SENSOR
3. Check continuity between TCM connector terminals and sec-
ondary speed sensor harness connector terminal. Refer to CVT-
37, "Circu

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NISSAN LATIO 2010 Service Repair Manual P0725 ENGINE SPEEDCVT-81
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P0725 ENGINE SPEED
DescriptionINFOID:0000000005397846
The engine speed signal is sent from the ECM to the T

P0725 ENGINE SPEEDCVT-81
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P0725 ENGINE SPEED
DescriptionINFOID:0000000005397846
The engine speed signal is sent from the ECM to the TCM.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005397847
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005397848
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0725” with CONSULT-III is detected when TCM does not receive the engine
speed signal (input by CAN communication) from ECM.
Possible CauseINFOID:0000000005397849
Harness or connectors
(The ECM to the TCM circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005397850
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Start engine and maintain the following conditions for at least 10 consecutive seconds. PRI SPEED SEN: More than 1000 rpm
3. If DTC is detected, go to CVT-81, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005397851
1. CHECK DTC WITH ECM
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “ENGINE” with CONSULT-III. Refer to EC-612, "
CONSULT-III
Function (ENGINE)".
OK or NG
OK >> GO TO 2.
NG >> Check the DTC detected item. Refer to EC-612, "
CONSULT-III Function (ENGINE)".
2. CHECK DTC WITH TCM
With CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “TRA NSMISSION” with CONSULT-III. Refer to CVT-48, "
CON-
SULT-III Function (TRANSMISSION)".
OK or NG
OK >> GO TO 3.
NG >> Check the DTC detected item. Refer to CVT-48, "
CONSULT-III Function (TRANSMISSION)".
Item nameCondition Display value
ENG SPEED SIG Engine running Closely matches the tachometer reading.
ACC PEDAL OPEN Released accelerator pedal - Fully depressed accel-
erator pedal 0.0/8 - 8.0/8
Revision: January 20102010 Versa

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NISSAN LATIO 2010 Service Repair Manual CVT-82
< SERVICE INFORMATION >[RE0F08B]
P0725 ENGINE SPEED
• If DTC of CAN communication line is detected, go to
CVT-56.
3. CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “ECU IN

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NISSAN LATIO 2010 Service Repair Manual P0730 INCORRECT GEAR RATIOCVT-83
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P0730 INCORRECT GEAR RATIO
DescriptionINFOID:0000000005397852
TCM selects the gear ratio using the

P0730 INCORRECT GEAR RATIOCVT-83
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P0730 INCORRECT GEAR RATIO
DescriptionINFOID:0000000005397852
TCM selects the gear ratio using the engine load (throttle position), the primary pulley revolution speed, and
the secondary pulley revolution speed as input signal. T hen it changes the operating pressure of the primary
pulley and the secondary pulley and changes the groove width of the pulley.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000005397853
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005397854
• This is not an OBD-II self-diagnostic item.
• TCM calculates the actual gear ratio with primary speed sensor and secondary speed sensor.
• Diagnostic trouble code “P0730” with CONSULT-III is detected, when TCM receives an unexpected gear
ratio signal.
Possible CauseINFOID:0000000005397855
Transaxle assembly
DTC Confirmation ProcedureINFOID:0000000005397856
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MO NITOR” mode for “TRANSMISSION” with CONSULT-III.
2. Make sure that output voltage of CVT fluid temperature sensor is within the range below.
ATF TEMP SEN: 1.0 - 2.0 V
If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to
increase the voltage (c ool down the fluid)
3. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
4. Start engine and maintain the following conditions for at least 30 consecutive seconds. TEST START FROM 0 km/h (0 MPH)
CONSTANT ACCELERATION: Keep 30 sec or more
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
ENG SPEED: 450 rpm or more
5. If DTC is detected, go to CVT-83, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005397857
1.CHECK DTC
Perform CVT-83, "
DTC Confirmation Procedure".
Are any DTC displayed?
YES - 1>> DTC except for “P0730” is displayed: Go to Check the DTC detected item. Refer to CVT-48,
"CONSULT-III Function (TRANSMISSION)".
YES - 2>> DTC for “P0730” is displayed: Replace the transaxle assembly. Refer to CVT-173, "
Removal and
Installation".
NO >> INSPECTION END
Item name Condition Display value (Approx.)
GEAR RATIO During driving 2.56 - 0.43
Revision: January 20102010 Versa

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NISSAN LATIO 2010 Service Repair Manual CVT-84
< SERVICE INFORMATION >[RE0F08B]
P0740 TORQUE CONVERTER
P0740 TORQUE CONVERTER
DescriptionINFOID:0000000005397858
• The torque converter clutch solenoid valve is included in the control valve

CVT-84
< SERVICE INFORMATION >[RE0F08B]
P0740 TORQUE CONVERTER
P0740 TORQUE CONVERTER
DescriptionINFOID:0000000005397858
• The torque converter clutch solenoid valve is included in the control valve assembly.
• The torque converter clutch solenoid valve is activated by the TCM in response to signals sent from the vehi-
cle speed and accelerator pedal position sensors. Lock-up piston operation will then be controlled.
• Lock-up operation, however, is prohibited when CVT fluid temperature is too low.
• When the accelerator pedal is depressed (less than 2.0/8) in lock-up condition, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000005397859
Remarks: Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000005397860
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0740” with CONSULT-III is detected under the following conditions.
- TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Possible CauseINFOID:0000000005397861
• Torque converter clutch solenoid valve
• Harness or connectors (Solenoid circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005397862
NOTE:
If “DTC Confirmation Procedure” has been previously performed, alw ays turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, touch “ERASE” on “SELF-DIAG RESULTS” and then perform the following procedure to con-
firm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III and wait at least 10 consecutive
seconds.
3. If DTC is detected, go to CVT-86, "
Diagnosis Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-III”.
Item name Condition Display value (Approx.)
ISOLT1 Lock-up OFF
0.0 A
Lock-up ON 0.7 A
Revision: January 20102010 Versa

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NISSAN LATIO 2010 Service Repair Manual P0740 TORQUE CONVERTERCVT-85
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Wiring Diagram - CVT - TCVINFOID:0000000005397863
TCM TERMINALS AND REFERENCE VALUES
Refer to CVT-46,

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NISSAN LATIO 2010 Service Repair Manual CVT-86
< SERVICE INFORMATION >[RE0F08B]
P0740 TORQUE CONVERTER
Diagnosis Procedure
INFOID:0000000005397864
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “MAIN SIGNALS” in “DAT

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NISSAN LATIO 2010 Service Repair Manual P0740 TORQUE CONVERTERCVT-87
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3. Check continuity between TCM connector terminal and CVT unit harness connector terminal.
4. If OK, c

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