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CVT-90
< SERVICE INFORMATION >[RE0F08B]
P0744 TORQUE CONVERTER
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK LINE PRESSURE
Perform line pressure test. Refer to CVT-37, "
Inspections before Trouble Diagnosis".
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts. Refer to CVT-37, "
Inspections before Trouble Diagnosis".
3.DETECT MALFUNCTIONING ITEM
Check the following:
• Torque converter clutch solenoid valve. Refer to CVT-87, "
Component Inspection".
• Lock-up select solenoid valve. Refer to CVT-127, "
Component Inspection".
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.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 5.
NG >> Repair or replace damaged parts.
5.CHECK DTC
Perform CVT-89, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6.CHECK TCM
1. Check TCM input/output signals. Refer to CVT-46, "
TCM Terminal and Reference Value".
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> 1. Repair or replace damaged parts. 2. Replace the transaxle assembly. Refer to CVT-180, "
Removal and Installation".
Item nameCondition Display value
ENG SPEED SIG Eng ine runningClosely matches the ta-
chometer reading.
PRI SPEED SEN During driving (lock-up ON) Approximately matches
the engine speed.
Revision: May 2010
2011 Versa
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P0745 PRESSURE CONTROL SOLENOID ACVT-91
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P0745 PRESSURE CONTROL SOLENOID A
DescriptionINFOID:0000000005928835
• The line pressure solenoid valve is included in the control valve assembly.
• The line pressure solenoid valve regulates the oil pum p discharge pressure to suit the driving condition in
response to a signal sent from the TCM.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000005928836
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000005928837
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0745” with CONSULT-III is detected under the following conditions.
- TCM detects an improper voltage drop when it tries to operate the solenoid valve.
- When TCM compares target value with monitor value and detects an irregularity.
Possible CauseINFOID:0000000005928838
• Harness or connectors
(Solenoid circuit is open or shorted.)
• Line pressure solenoid valve
DTC Confirmation ProcedureINFOID:0000000005928839
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. Start engine and wait at least 5 seconds.
3. If DTC is detected, go to CVT-93, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Item name Condition Display value (Approx.)
ISOLT2 Release your foot from the accelerator pedal.
0.8 A
Press the accelerator pedal all the way down. 0.0 A
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CVT-92
< SERVICE INFORMATION >[RE0F08B]
P0745 PRESSURE CONTROL SOLENOID A
Wiring Diagram - CVT - LPSV
INFOID:0000000005928840
TCM TERMINALS AND REFERENCE VALUES
Refer to CVT-46, "TCM Terminal and Reference Value".
BCWA0675E
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P0745 PRESSURE CONTROL SOLENOID ACVT-93
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Diagnosis ProcedureINFOID:0000000005928841
1. CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Read out the value of “ISOLT2”.
Without CONSULT-III
1. Start engine.
2. Check voltage between TCM connector terminal and ground.
3. Turn ignition switch OFF.
4. Disconnect TCM connector.
5. Check if there is continuity between connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK LINE PRESSURE SOLENOID VALVE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check resistance between TCM connector terminal and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
3.CHECK VALVE RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
Item name Condition Display value (Approx.)
ISOLT2 Release your foot from the
accelerato
r pedal. 0.8 A
Press the accelerator ped-
al all the way down. 0.0 A
Name Connector Terminal
ConditionVoltage
(Approx.)
Line pres-
sure sole-
noid valve E31 1 - ground Release your foot from
the accelerator pedal. 5.0 - 7.0 V
Press the accelerator
pedal all the way down. 1.0 - 3.0 V
SCIA2348E
Solenoid valve
Connector TerminalResistance (Ap-
prox.)
Line pressure solenoid valve E31 1 - ground 3 - 9 Ω
SCIA4685E
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CVT-94
< SERVICE INFORMATION >[RE0F08B]
P0745 PRESSURE CONTROL SOLENOID A
3. Check resistance between CVT unit harness connector terminal
and ground.
OK or NG
OK >> GO TO 4.
NG >> Replace the transaxle assembly. Refer to CVT-180,
"Removal and Installation".
4. CHECK HARNESS BETWEEN TCM AND LINE PRESSURE SOLENOID VALVE
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector and TCM connector.
3. Check continuity between TCM connector terminal and CVT unit harness connector terminal.
4. If OK, check harness for short to ground and short to power.
5. If OK, check continuity between ground and CVT assembly.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK DTC
Perform CVT-91, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6.CHECK TCM
1. Check TCM terminals and reference values. Refer to CVT-46, "
TCM Terminal and Reference Value".
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> 1. Repair or replace damaged parts. 2. Replace the transaxle assembly. Refer to CVT-180, "
Removal and Installation".
Component InspectionINFOID:0000000005928842
LINE PRESSURE SOLENOID VALVE
1. Turn ignition switch OFF.
2. Disconnect CVT unit harness connector.
Solenoid valveConnector Terminal Resistance (Ap-
prox.)
Line pressure solenoid valve F46 2 - Ground 3 - 9 Ω
SCIA4686E
ItemConnector Terminal Continuity
TCM E311
Ye s
CVT unit harness connector F46 2
SCIA4687E
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P0745 PRESSURE CONTROL SOLENOID ACVT-95
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3. Check resistance between CVT unit harness connector terminal and ground.
4. If NG, replace the transaxle assembly. Refer to CVT-180,
"Removal and Installation".
Solenoid valveConnector TerminalResistance (Ap-
prox.)
Line pressure solenoid valve F46 2 - Ground 3 - 9 Ω
SCIA4686E
Revision: May 2010 2011 Versa
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CVT-96
< SERVICE INFORMATION >[RE0F08B]
P0746 PRESSURE CONTROL SOLENOID A
P0746 PRESSURE CONTROL SOLENOID A
DescriptionINFOID:0000000005928843
• The line pressure solenoid valve is included in the control valve assembly.
• The line pressure solenoid valve regulates the oil pum
p discharge pressure to suit the driving condition in
response to a signal sent from the TCM.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000005928844
Remarks: Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000005928845
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0746” with CONSULT-III is detected under the following conditions.
- Unexpected gear ratio was detected in the LOW side due to excessively low line pressure.
Possible CauseINFOID:0000000005928846
• Line pressure control system
• Secondary speed sensor
• Primary speed sensor
DTC Confirmation ProcedureINFOID:0000000005928847
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 and select “DATA MONI TOR” mode for “TRANSMISSION” with CONSULT-III.
2. Start engine and maintain the following conditions for at least 10 consecutive seconds. Test start from 0
km/h (0 MPH).
ATF TEMP SEN: 1.0 - 2.0 V
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
VEHICLE SPEED: 10 km/h (6 MPH) More than
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
3. If DTC is detected, go to CVT-96, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000005928848
1.CHECK LINE PRESSURE
Perform line pressure test. Refer to CVT-37, "
Inspections before Trouble Diagnosis".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace damaged parts. Refer to CVT-37, "
Inspections before Trouble Diagnosis".
2.DETECT MALFUNCTIONING ITEM
Check line pressure solenoid valve. Refer to CVT-94, "
Component Inspection".
Item nameCondition Display value (Approx.)
PRI PRESS “N” position idle 0.4 MPa
Revision: May 2010 2011 Versa
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P0746 PRESSURE CONTROL SOLENOID ACVT-97
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OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3.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 4.
NG >> Repair or replace damaged parts.
4.DETECT MALFUNCTIONING ITEM
Check the following:
• Power supply and ground circuit for TCM. Refer to CVT-114, "
Wiring Diagram - CVT - POWER".
• 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-96, "
DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> Replace the transaxle assembly or TCM. Refer to CVT-180, "
Removal and Installation".
Revision: May 2010 2011 Versa