2011 NISSAN LATIO engine

CVT-120
< SERVICE INFORMATION >[RE0F08B]
P1722 VEHICLE SPEED
With CONSULT-III
1. Start engine.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
3. Drive vehicle and read out the value of “VEHICLE SPEED” and “ESTM VSP SIG”.
4. Check if there is a great difference between the two values.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.CHECK TCM
Check TCM input/output signals. Refer to CVT-46, "
TCM Terminal and Reference Value".
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK DTC
Perform CVT-119, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
Item name ConditionDisplay value
ESTM VSP SIG During drivingApproximately matches
the speedometer reading.
VEHICLE SPEED
Revision: May 2010 2011 Versa

P1723 SPEED SENSORCVT-121
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P1723 SPEED SENSOR
DescriptionINFOID:0000000005928900
• The primary speed sensor is included in the control valve assembly.
• The secondary speed sensor detects the revolution of the idler gear and generates a pulse signal. The pulse signal is sent to the TCM, which converts it into vehicle speed.
• The primary speed sensor detects the primary pul ley revolution speed and sends a signal to the TCM.
On Board Diagnosis LogicINFOID:0000000005928901
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1723” with CONSULT-III is det ected when there is a great difference between the
vehicle speed signal and the secondary speed sensor signal.
CAUTION:
One of the “P0720”, the “P0715” or the “P0725“ is displayed with the DTC at the same time.
Possible CauseINFOID:0000000005928902
• Harness or connectors
(Sensor circuit is open or shorted.)
• Secondary speed sensor
• Primary speed sensor
• Engine speed signal system
DTC Confirmation ProcedureINFOID:0000000005928903
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 5 consecutive seconds.
VEHICLE SPEED SE: 10 km/h (6 MPH) or more
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
ENG SPEED: 450 rpm or more
Driving location: Driving the vehic le uphill (increased engine load) will help maintain the driving
conditions required for this test.
3. If DTC is detected, go to CVT-121, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005928904
1.CHECK STEP MOTOR FUNCTION
Perform the self-diagnosis check. Refer to CVT-48, "
CONSULT-III Function (TRANSMISSION)".
Is a malfunction in the step motor function indicated in the results?
YES >> Repair or replace damaged parts. (C heck the step motor function. Refer to CVT-133.)
NO >> GO TO 2.
2.CHECK SECONDARY SPEED SENSOR SYSTEM AND PRIMARY SPEED SENSOR SYSTEM
Check secondary speed sensor system and primary speed sensor system. Refer to CVT-76
, CVT-72.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.CHECK ENGINE SPEED SIGNAL SYSTEM
Revision: May 2010 2011 Versa

CVT-122
< SERVICE INFORMATION >[RE0F08B]
P1723 SPEED SENSOR
Check engine speed signal system. Refer to
CVT-81.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts. Refer to EC-1019, "
Component Description".
4.DETECT MALFUNCTIONING ITEM
Check the following:
• Power supply and ground circuit for TCM. Refer to CVT-113
.
• The TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK DTC
Perform CVT-121, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> Replace TCM or transaxle assembly. Refer to CVT-159, "
Removal and Installation", CVT-180,
"Removal and Installation".
Revision: May 2010 2011 Versa

P1726 THROTTLE CONTROL SIGNALCVT-123
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P1726 THROTTLE CONTROL SIGNAL
DescriptionINFOID:0000000005928905
Electric throttle control actuator consists of throttle control motor, accelerator pedal position sensor, throttle
position sensor etc. The actuator sends a signal to the ECM, and ECM sends the signal to TCM with CAN
communication.
On Board Diagnosis LogicINFOID:0000000005928906
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1726” with CONS ULT-III is detected when the electronically controlled throttle for
ECM is malfunctioning.
Possible CauseINFOID:0000000005928907
Harness or connectors
(Sensor circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005928908
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. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine and let it idle for 5 second.
4. If DTC is detected, go to CVT-123, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005928909
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)".
• If CAN communication line is detected, go to CVT-56
.
2.CHECK DTC
Perform CVT-123, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 3.
3.DETECT MALFUNCTIONING ITEM
Check the following:
• The TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace TCM. Refer to CVT-159, "Removal and Installation".
NG >> Repair or replace damaged parts.
Revision: May 2010 2011 Versa

CVT-124
< SERVICE INFORMATION >[RE0F08B]
P1740 SELECT SOLENOID
P1740 SELECT SOLENOID
DescriptionINFOID:0000000005928910
• The lock-up select solenoid valve is included in the control valve assembly.
• The lock-up select solenoid valve controls lock-up clutch pressure or forward clutch pressure (reverse brake
pressure).
• When controlling lock-up clutch, the valve is turned OFF. When controlling forward clutch, it is turned ON.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000005928911
On Board Diagn osis LogicINFOID:0000000005928912
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1740” with CONSULT-III is detected under the following conditions.
- When TCM compares target value with monitor value and detects an irregularity.
Possible CauseINFOID:0000000005928913
• Lock-up select solenoid valve
• Harness or connectors
(Solenoid circuit is open or shorted.)
DTC Confirmation ProcedureINFOID:0000000005928914
CAUTION:
Always drive vehicle at a safe speed.
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 fo r “TRANSMISSION” with CONSULT-III.
3. Start engine and maintain the following conditions for at least 5 consecutive seconds. RANGE: “D” position and “N” position
(At each time, wait for 5 seconds.)
4. If DTC is detected, go to CVT-126, "
Diagnosis Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-III”.
Item name Condition Display value
LUSEL SOL OUT Selector lever in “P
” and “N” positions on
Wait at least for 5 seconds with the selector lever
in “R”, “D” and “L” positions off
Revision: May 2010
2011 Versa

CVT-128
< SERVICE INFORMATION >[RE0F08B]
P1745 LINE PRESSURE CONTROL
P1745 LINE PRESSURE CONTROL
DescriptionINFOID:0000000005928918
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to a signal sent from the TCM.
On Board Diagn
osis LogicINFOID:0000000005928919
• This is not an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1745” with CONSULT-III is detected when TCM detects the unexpected line pres-
sure.
Possible CauseINFOID:0000000005928920
TCM
DTC Confirmation ProcedureINFOID:0000000005928921
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 and select “DATA MONI TOR” 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 (cool down the fluid)
3. If DTC is detected, go to CVT-128, "
Diagnosis Procedure" .
Diagnosis ProcedureINFOID:0000000005928922
1.CHECK DTC
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode fo r “TRANSMISSION” with CONSULT-III.
3. Erase self-diagnostic results. Refer to CVT-27, "
OBD-II Diagnostic Trouble Code (DTC)".
4. Turn ignition switch OFF, and wait for 10 seconds or more.
5. Start engine.
6. Confirm self-diagnostic results again. Refer to CVT-48, "
CONSULT-III Function (TRANSMISSION)" .
Is the
“P1745” displayed?
YES >> Replace TCM. Refer to CVT-159, "Removal and Installation" .
NO >> INSPECTION END
Revision: May 2010 2011 Versa

P1777 STEP MOTORCVT-131
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Diagnosis ProcedureINFOID:0000000005928929
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “SELECTION FROM MENU” in “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start vehicle and read out the value of “STM STEP”, “SMCOIL A”, “SMCOIL B”, “SMCOIL C”, and
“SMCOIL D”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2.CHECK HARNESS BETWEEN TCM AND STEP MOTOR
1. Turn ignition switch OFF.
2. Disconnect CVT unit connector and TCM connector.
3. Check continuity between TCM connector terminals and CVT unit harness connector terminals.
4. If OK, check harness for short to ground and short to power.
5. If OK, check continuity between body ground and CVT assembly.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK STEP MOTOR
Check step motor. Refer to CVT-132, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK DTC
Perform CVT-129, "
DTC Confirmation Procedure" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 5.
Item name ConditionDisplay value (Approx.)
STM STEP
During driving(−
20) - (+180) step
SMCOIL A
Changes on⇔off.
SMCOIL B
SMCOIL C
SMCOIL D
Item
Connector Terminal Continuity
TCM E3111
Ye s
CVT unit harness connector F46 6
TCM E3112
Ye s
CVT unit harness connector F46 7
TCM E3120
Ye s
CVT unit harness connector F46 8
TCM E3121
Ye s
CVT unit harness connector F46 9
SCIA4695E
Revision: May 2010 2011 Versa

P1778 STEP MOTORCVT-133
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P1778 STEP MOTOR
DescriptionINFOID:0000000005928931
• The step motor is included in the control valve assembly.
• The step motor's 4 aspects of ON/OFF change according to the signal from TCM. As a result, the flow of line pressure to primary pulley is changed and pulley ratio is controlled.
• This diagnosis item is detected when electrical system is OK, but mechanical system is NG.
• This diagnosis item is detected when the state of the changing the speed mechanism in unit does not oper- ate normally.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005928932
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005928933
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P1778” with CONSULT-III is detected under the following conditions.
- When not changing the pulley ratio according to the instruction of TCM.
Possible CauseINFOID:0000000005928934
Step motor
DTC Confirmation ProcedureINFOID:0000000005928935
CAUTION:
• Always drive vehicle at a safe speed.
• Before starting “DTC Confirmation Procedure”, confirm “Hi” or “Mid” or “Low” fixation by “PRI
SPEED” and “VEHICLE SPEED” on “DATA MONITOR MODE”.
• If hi-geared fixation occurred, go to CVT-134, "
Diagnosis Procedure".
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. 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-134, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Item name Condition Display value (Approx.)
STM STEP During driving(−
20) - (+180) step
GEAR RATIO 2.56 - 0.43
Revision: May 2010 2011 Versa