Nissan X-Trail 32. Manual — part 2096
TM-342
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10D]
P0743 TORQUE CONVERTER
P0743 TORQUE CONVERTER
DTC Description
INFOID:0000000010622528
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connector (Torque converter clutch solenoid valve circuit is shorted to ground)
• Torque converter clutch solenoid valve
FAIL-SAFE
• Start is slow
• Acceleration is slow
• Lock-up is not performed
DTC CONFIRMATION PROCEDURE
CAUTION:
Be careful of the driving speed.
1.
PREPARATION BEFORE WORK
If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.
>> GO TO 2.
2.
PREPARATION BEFORE OPERATION
With CONSULT
1.
Start the engine.
2.
Select “Data Monitor” in “TRANSMISSION”.
3.
Select “FLUID TEMP”.
4.
Confirm that the CVT fluid temperature is in the following range.
With GST
1.
Start the engine.
2.
Set the CVT fluid to 20
°
C (68
°
F) or more.
NOTE:
When the ambient temperature is 20
°
C (68
°
F), the CVT fluid usually increases to 50 to 80
°
C (122 to
176
°
F) with driving in an urban area for approximately 10 minutes.
Is the CVT fluid 20
°
C (68
°
F) or more?
YES
>> GO TO 3.
NO
>> 1.
Warm the transaxle.
2.
GO TO 3.
3.
CHECK DTC DETECTION
1.
Drive the vehicle.
2.
Maintain the following conditions for 10 seconds or more.
3.
Stop the vehicle.
4.
Check the first trip DTC.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P0743
TORQUE CONVERTER
(Torque Converter Clutch Circuit Electrical)
When all of the following conditions are satisfied and this state is main-
tained for 0.48 seconds:
• TCM power supply voltage: More than 11 V
• TCM judges that solenoid valve circuit is shorted to ground.
FLUID TEMP
: 20
°
C (68
°
F) or more
Selector lever
: “D” position
Vehicle speed
: 40 km/h (25 MPH) or more
P0743 TORQUE CONVERTER
TM-343
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10D]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Is “P0743” detected?
YES
>> Go to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010622529
1.
CHECK CIRCUIT BETWEEN TCM AND CVT UNIT
1.
Turn ignition switch OFF.
2.
Disconnect TCM connector and CVT unit connector.
3.
Check continuity between TCM harness connector terminal and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning parts.
2.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE CIRCUIT
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES >> INSPECTION
END
NO
>> There is malfunction of torque converter clutch solenoid valve. Replace transaxle assembly. Refer
to
TM-450, "Removal and Installation"
.
TCM
—
Continuity
Connector
Terminal
F23
38
Ground
Not existed
CVT unit
—
Condition
Resistance
Connector
Terminal
F250
5
Ground
CVT fluid temperature: 20
°
C (68
°
F)
5.5 – 7.0
Ω
CVT fluid temperature: 50
°
C (122
°
F)
6.0 – 8.0
Ω
CVT fluid temperature: 80
°
C (176
°
F)
6.5 – 8.5
Ω
TM-344
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10D]
P0744 TORQUE CONVERTER
P0744 TORQUE CONVERTER
DTC Description
INFOID:0000000010622530
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Torque converter clutch solenoid valve
• Control valve assembly
• Torque converter
FAIL-SAFE
• Start is slow
• Acceleration is slow
• Lock-up is not performed
DTC CONFIRMATION PROCEDURE
CAUTION:
Be careful of the driving speed.
1.
PREPARATION BEFORE WORK
If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at
least 10 seconds, then perform the next test.
>> GO TO 2.
2.
PREPARATION BEFORE OPERATION
With CONSULT
1.
Start the engine.
2.
Select “Data Monitor” in “TRANSMISSION”.
3.
Select “FLUID TEMP”.
4.
Confirm that the CVT fluid temperature is in the following range.
With GST
1.
Start the engine.
2.
Set the CVT fluid to 20
°
C (68
°
F) or more.
NOTE:
When the ambient temperature is 20
°
C (68
°
F), the CVT fluid usually increases to 50 to 80
°
C (122 to
176
°
F) with driving in an urban area for approximately 10 minutes.
Is the CVT fluid 20
°
C (68
°
F) or more?
YES
>> GO TO 3.
NO
>> 1.
Warm the transaxle.
2.
GO TO 3.
3.
CHECK DTC DETECTION
1.
Drive the vehicle.
2.
Maintain the following conditions for 30 seconds or more.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P0744
TORQUE CONVERTER
(Torque converter clutch circuit intermittent)
When all of the following conditions are satisfied and this state is main-
tained for 30 seconds:
• TCM power supply voltage: More than 11 V
• P0717 is not detected.
• CAN communication is normal
• Torque converter slip speed: (40+vihicle speed/2) rpm
• LU pressure: More than 0.2 MPa
FLUID TEMP
: 20
°
C (68
°
F) or more
P0744 TORQUE CONVERTER
TM-345
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10D]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
3.
Stop the vehicle.
4.
Check the first trip DTC.
Is “P0744” detected?
YES
>> Go to
NO-1
>> To check malfunction symptom before repair: Refer to
GI-44, "Intermittent Incident"
NO-2
>> Confirmation after repair: INSPECTION END
Diagnosis Procedure
INFOID:0000000010622531
1.
REPLACE TRANSAXLE ASSEMBLY
Replace transaxle assembly. Refer to
TM-450, "Removal and Installation"
>> WORK END
Selector lever
: “D” position
Accelerator pedal position
: 0.5/8 or more
Vehicle speed
: 40 km/h (25 MPH) or more
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