Nissan Cube. Instruction — part 967
TM-124
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
P0740 TORQUE CONVERTER
7.
Select “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT”.
Is “P0740” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009948976
1.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE CIRCUIT
1.
Turn ignition switch OFF.
2.
Check resistance between TCM connector terminal and ground.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-40, "Intermittent Incident"
.
NO
>> GO TO 2.
2.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
1.
Disconnect CVT unit connector.
2.
Check torque converter clutch solenoid valve. Refer to
TM-125, "Component Inspection (Torque Con-
verter Clutch Solenoid Valve)"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Torque converter clutch solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
3.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (TORQUE CONVERTER CLUTCH SOLENOID
VALVE) (PART 1)
1.
Disconnect TCM connector.
2.
Check continuity between TCM vehicle side harness connector terminal and CVT unit vehicle side har-
ness connector terminal.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (TORQUE CONVERTER CLUTCH SOLENOID
VALVE) (PART 2)
Check continuity between TCM vehicle side harness connector terminal and ground.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-40, "Intermittent Incident"
.
NO
>> Repair or replace damaged parts.
TCM connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
E18
3
CVT fluid temperature: 20
°
C (68
°
F)
5.60 – 6.60
Ω
CVT fluid temperature: 50
°
C (122
°
F)
6.76 – 6.87
Ω
CVT fluid temperature: 80
°
C (176
°
F)
7.47 – 7.59
Ω
TCM vehicle side harness connector
CVT unit vehicle side harness connector
Continuity
Connector
Terminal
Connector
Terminal
E18
3
F24
12
Existed
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
E18
3
Not existed
P0740 TORQUE CONVERTER
TM-125
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Component Inspection (Torque Converter Clutch Solenoid Valve)
INFOID:0000000009948977
1.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Torque converter clutch solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
CVT unit harness connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
F24
12
CVT fluid temperature: 20
°
C (68
°
F)
5.60 – 6.60
Ω
CVT fluid temperature: 50
°
C (122
°
F)
6.76 – 6.87
Ω
CVT fluid temperature: 80
°
C (176
°
F)
7.47 – 7.59
Ω
TM-126
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
P0744 TORQUE CONVERTER
P0744 TORQUE CONVERTER
Description
INFOID:0000000009948978
• This is detected when torque converter clutch is not engaged under an electrically normal condition of torque
converter clutch solenoid valve.
• This DTC is not caused by an electrical malfunction (circuit open or short) but is caused by a mechanical
malfunction (control valve clogging, solenoid valve sticking, and others).
DTC Logic
INFOID:0000000009948979
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
1.
PRECONDITIONING
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
1.
Start the engine.
2.
Select “Data Monitor” in “TRANSMISSION”.
3.
Select “RANGE”, “ATF TEMP SEN”, “ACC PEDAL OPEN” and “VEHICLE SPEED”.
4.
Drive the vehicle.
5.
Maintain the following conditions for 10 seconds or more.
6.
Stop the vehicle.
7.
Select “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT”.
Is “P0744” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009948980
1.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
TM-209, "Inspection and Judgment"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts. Refer to
TM-209, "Inspection and Judgment"
.
2.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0744
Torque Converter Clutch Cir-
cuit Intermittent
Torque converter slip speed is more than a
certain value (40 rpm + vehicle speed/2)
while TCM is in lock-up command state
• Hydraulic control circuit
• Torque converter clutch solenoid valve
• Lock-up select solenoid valve
RANGE
: D
ATF TEMP SEN
: 2.03 V or less
ACC PEDAL OPEN
: 0.0/8 – 1.0/8
VEHICLE SPEED
: More than 40 km/h (25 MPH)
P0744 TORQUE CONVERTER
TM-127
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
1.
Turn ignition switch OFF.
2.
Disconnect CVT unit connector.
3.
Check torque converter clutch solenoid valve. Refer to
TM-127, "Component Inspection (Torque Con-
verter Clutch Solenoid Valve)"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Torque converter clutch solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
3.
CHECK LOCK-UP SELECT SOLENOID VALVE
Check lock-up select solenoid valve. Refer to
TM-127, "Component Inspection (Lock-up Select Solenoid
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Lock-up select solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
4.
CHECK PRIMARY SPEED SENSOR SYSTEM
Check primary speed sensor system. Refer to
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
CHECK SECONDARY SPEED SENSOR SYSTEM
Check secondary speed sensor system. Refer to
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace damaged parts.
6.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace transaxle assembly. Refer to
NO
>> Repair or replace damaged parts.
Component Inspection (Torque Converter Clutch Solenoid Valve)
INFOID:0000000009948981
1.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Torque converter clutch solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
Component Inspection (Lock-up Select Solenoid Valve)
INFOID:0000000009948982
1.
CHECK LOCK-UP SELECT SOLENOID VALVE
Check resistance between CVT unit harness connector terminal and ground.
CVT unit harness connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
F24
12
CVT fluid temperature: 20
°
C (68
°
F)
5.60 – 6.60
Ω
CVT fluid temperature: 50
°
C (122
°
F)
6.76 – 6.87
Ω
CVT fluid temperature: 80
°
C (176
°
F)
7.47 – 7.59
Ω
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