Nissan Qashqai J11. Manual — part 741
P0740 TORQUE CONVERTER
TM-539
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10G]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P0740 TORQUE CONVERTER
DTC Logic
INFOID:0000000010245613
DTC DETECTION LOGIC
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.
Is “P0740” detected?
YES
>> Go to
NO
>> INSPECTION END
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
P0740
TORQUE CONVERTER
(Torque Converter Clutch Cir-
cuit/Open)
When all of the following conditions are satis-
fied and this state is maintained for 5 seconds:
• TCM power supply voltage: More than 11 V
• P0743 is not detected.
• TCM judges that solenoid valve circuit is
open.
• Harness or connector
(Torque converter clutch solenoid valve
circuit is open or shorted to power sup-
ply)
• Torque converter clutch solenoid valve
FLUID TEMP
: 20
°
C (68
°
F) or more
Selector lever
: “D” position
Vehicle speed
: 40 km/h (25 MPH) or more
TM-540
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10G]
P0740 TORQUE CONVERTER
Diagnosis Procedure
INFOID:0000000010245614
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 CVT unit harness connector terminal.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning parts.
2.
CHECK CIRCUIT BETWEEN CVT UNIT AND GROUND
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES >> Check
intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> There is malfunction of torque converter clutch solenoid valve. Replace transaxle assembly. Refer
to
TM-653, "Removal and Installation"
.
TCM
CVT unit
Continuity
Connector
Terminal
Connector
Terminal
F1
38
F58
5
Existed
CVT unit
—
Condition
Resistance
Connector
Terminal
F207
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
P0743 TORQUE CONVERTER
TM-541
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10G]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P0743 TORQUE CONVERTER
DTC Logic
INFOID:0000000010245615
DTC DETECTION LOGIC
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.
Is “P0743” detected?
YES
>> Go to
NO
>> INSPECTION END
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
P0743
TORQUE CONVERTER
(Torque Converter Clutch Cir-
cuit Electrical)
When all of the following conditions are satis-
fied and this state is maintained for 0.48 sec-
onds:
• TCM power supply voltage: More than 11 V
• TCM judges that solenoid valve circuit is
shorted to ground.
• Harness or connector
(Torque converter clutch solenoid valve
circuit is shorted to ground)
• Torque converter clutch solenoid valve
FLUID TEMP
: 20
°
C (68
°
F) or more
Selector lever
: “D” position
Vehicle speed
: 40 km/h (25 MPH) or more
TM-542
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F10G]
P0743 TORQUE CONVERTER
Diagnosis Procedure
INFOID:0000000010245616
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 CIRCUIT BETWEEN CVT UNIT AND GROUND
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES >> Check
intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
NO
>> There is malfunction of torque converter clutch solenoid valve. Replace transaxle assembly. Refer
to
TM-653, "Removal and Installation"
.
TCM
—
Continuity
Connector
Terminal
F1
38
Ground
Not existed
CVT unit
—
Condition
Resistance
Connector
Terminal
F207
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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст