Nissan Maxima. Instruction — part 1151
TM-68
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0740 TORQUE CONVERTER
1. Disconnect CVT unit connector.
2. Check continuity between TCM vehicle side harness connector
terminal and CVT unit vehicle side harness connector terminal.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (TORQUE CONVERTER CLUTCH SOLENOID
VALVE) (PART 2)
Check continuity between TCM vehicle side harness connector ter-
minal and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
Check torque converter clutch solenoid valve. Refer to
TM-68, "Component Inspection (Torque Converter
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace transaxle assembly. Refer to
5.
DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
NO
>> Repair or replace damaged parts.
Component Inspection (Torque Converter Clutch Solenoid Valve)
INFOID:0000000010113615
1.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
Check resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace transaxle assembly. Refer to
.
TCM vehicle side harness
connector
CVT unit vehicle side harness
connector
Continuity
Connector
Terminal
Connector
Terminal
F15 (A)
38
F46 (B)
12
Existed
AWDIA0117ZZ
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
F15
38
Not existed
AWDIA0116ZZ
CVT unit connector
Ground
Resistance
(Approx.)
Connector
Terminal
F46
12
3.0 – 9.0
Ω
AWDIA0118ZZ
P0744 TORQUE CONVERTER
TM-69
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
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P0744 TORQUE CONVERTER
Description
INFOID:0000000010113616
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 malfunctions (circuits open or shorted), but also by mechanical malfunctions
such as control valve sticking, improper solenoid valve operation, etc.
DTC Logic
INFOID:0000000010113617
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.
CHECK DTC DETECTION
With CONSULT
1. Turn ignition switch ON.
2. Select “Data Monitor” in “TRANSMISSION”.
3. Start engine and maintain the following condition for at least 30 seconds.
With GST
Follow the procedure “With CONSULT”.
Is “P0744” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000010113618
1.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
TM-162, "Inspection and Judgment"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts. Refer to
TM-162, "Inspection and Judgment"
.
2.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
1. Turn ignition switch OFF.
2. Disconnect CVT unit connector.
3. Check torque converter clutch solenoid valve. Refer to
TM-70, "Component Inspection (Torque Converter
.
Is the inspection result normal?
YES
>> GO TO 3.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0744
Torque Converter Clutch Cir-
cuit Intermittent
• CVT cannot perform lock-up even if elec-
trical circuit is good.
• TCM detects as irregular by comparing
difference value with slip rotation.
• There is a big difference between engine
speed and primary speed sensor when
TCM lock-up signal is on.
• Torque converter clutch solenoid valve
• Hydraulic control circuit
ACC PEDAL OPEN
: More than 1.0/8
RANGE
: “D” position
VEHICLE SPEED
: Constant speed of more than 40 km/h (25 MPH)
TM-70
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
P0744 TORQUE CONVERTER
NO
>> Replace transaxle assembly. Refer to
3.
CHECK LOCK-UP SELECT SOLENOID VALVE
Check lock-up select solenoid valve. Refer to
TM-70, "Component Inspection (Lock-up Select Solenoid
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace transaxle assembly. Refer to
4.
CHECK SECONDARY SPEED SENSOR SYSTEM
Check secondary speed sensor system. Refer to
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace damaged parts.
5.
CHECK PRIMARY SPEED SENSOR SYSTEM
Check primary speed sensor system. Refer to
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace damaged parts.
6.
DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES
NO
>> Repair or replace damaged parts.
Component Inspection (Torque Converter Clutch Solenoid Valve)
INFOID:0000000010113619
1.
CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE
Check resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace transaxle assembly. Refer to
.
Component Inspection (Lock-up Select Solenoid Valve)
INFOID:0000000010113620
1.
CHECK LOCK-UP SELECT SOLENOID VALVE
Check resistance between CVT unit connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace transaxle assembly. Refer to
.
CVT unit connector
Ground
Resistance
(Approx.)
Connector
Terminal
F46
12
3.0 – 9.0
Ω
AWDIA0118ZZ
CVT unit connector
Ground
Resistance
(Approx.)
Connector
Terminal
F46
13
6.0 – 19.0
Ω
AWDIA0119ZZ
P0745 PRESSURE CONTROL SOLENOID A
TM-71
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F09B]
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P0745 PRESSURE CONTROL SOLENOID A
Description
INFOID:0000000010113621
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to a signal sent from the TCM.
DTC Logic
INFOID:0000000010113622
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.
CHECK DTC DETECTION
With CONSULT
1. Turn ignition switch ON.
2. Start engine and wait at least 5 seconds.
3. Perform “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT”.
Is “P0745” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-41, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000010113623
Regarding Wiring Diagram information, refer to
.
1.
CHECK LINE PRESSURE SOLENOID VALVE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check resistance between TCM vehicle side harness connector
terminal and ground.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 2.
2.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (LINE PRESSURE SOLENOID VALVE) (PART 1)
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0745
Pressure Control Solenoid A
• Normal voltage is not applied to solenoid
due to open or short circuit.
• TCM detects as irregular by comparing
target value with monitor value.
• Harness or connectors
(Solenoid circuit is open or shorted.)
• Line pressure solenoid valve
TCM vehicle side harness connector
Ground
Resistance
(Approx.)
Connector
Terminal
F15
40
3.0 – 9.0
Ω
AWDIA0120ZZ
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