2008 NISSAN LATIO Service Repair Manual

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Page 929 of 2771

NISSAN LATIO 2008 Service Repair Manual CVT-90
< SERVICE INFORMATION >
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Diagnosis Procedure
INFOID:0000000001703537
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select “MAIN SIG

Page 930 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
CVT-91
< SERVICE INFORMATION >
D
E
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B
CVT
N
O
P
3. Check continuity between TCM connector terminal and CVT unit
harness connector termi

Page 931 of 2771

NISSAN LATIO 2008 Service Repair Manual CVT-92
< SERVICE INFORMATION >
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
3. Check resistance between CVT unit harness connector terminal
and ground.
4. If NG, replace the transaxle assembly. Re

Page 932 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
CVT-93
< SERVICE INFORMATION >
D
E
F
G
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MA
B
CVT
N
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DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
DescriptionINFOID:0000000001703539
• The torque conv

DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
CVT-93
< SERVICE INFORMATION >
D
E
F
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B
CVT
N
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DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
DescriptionINFOID:0000000001703539
• The torque converter clutch solenoid valve is included in the control valve assembly.
• This malfunction is detected when the torque converter clutch does not lock-up as instructed by the TCM.
This is not only caused by electrical malfunction (circuits open or shorted), but also by mechanical malfunc-
tion such as control valve sticking, improper solenoid valve operation, etc.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001703540
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001703541
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0744 A/T TCC S/V FNCTN” with CONSULT-III is detected under the following
conditions.
- When CVT cannot perform lock-up even if electrical circuit is good.
- When TCM compares difference value with slip revolution and detects an irregularity.
Possible CauseINFOID:0000000001703542
• Torque converter clutch solenoid valve
• Hydraulic control circuit
DTC Confirmation ProcedureINFOID:0000000001703543
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. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start engine and maintain the following condition for at least 30 seconds.
ACC PEDAL OPEN: More than 1.0/8
RANGE: “D” position
[Vehicle speed: Constant speed of more than 40 km/h (25 MPH)]
4. If DTC is detected go to CVT-93, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-III”.
Diagnosis ProcedureINFOID:0000000001703544
1.CHECK INPUT SIGNALS
With CONSULT-III
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.
3. Start vehicle.
4. Check if there is a great difference between “ENG SPEED SIG” and “PRI SPEED SEN”. (Lock-up ON.)
Item name Condition Display value
ENG SPEED SIG Engine running Closely matches the tachometer reading.
PRI SPEED SEN During driving (lock-up ON) Approximately matches the engine speed.

Page 933 of 2771

NISSAN LATIO 2008 Service Repair Manual CVT-94
< SERVICE INFORMATION >
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK LINE PRESSURE
Perform line pressure test. Refer to CVT-36, "
Inspections befo

Page 934 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0745 LINE PRESSURE SOLENOID VALVE
CVT-95
< SERVICE INFORMATION >
D
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CVT
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DTC P0745 LINE PRESSURE SOLENOID VALVE
DescriptionINFOID:0000000001703545
• The pressure contro

Page 935 of 2771

NISSAN LATIO 2008 Service Repair Manual CVT-96
< SERVICE INFORMATION >
DTC P0745 LINE PRESSURE SOLENOID VALVE
Wiring Diagram - CVT - LPSV
INFOID:0000000001703550
TCM TERMINALS AND REFERENCE VALUES
Refer to CVT-45, "TCM Terminal and Refe

Page 936 of 2771

NISSAN LATIO 2008 Service Repair Manual DTC P0745 LINE PRESSURE SOLENOID VALVE
CVT-97
< SERVICE INFORMATION >
D
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K
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MA
B
CVT
N
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Diagnosis ProcedureINFOID:0000000001703551
1. CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine

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