Nissan Cube. Instruction — part 968
TM-128
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
P0744 TORQUE CONVERTER
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Lock-up select solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
.
CVT unit harness connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
F24
13
CVT fluid temperature: 20
°
C (68
°
F)
12.3 – 13.5
Ω
CVT fluid temperature: 50
°
C (122
°
F)
13.7 – 15.1
Ω
CVT fluid temperature: 80
°
C (176
°
F)
15.1 – 16.7
Ω
P0745 PRESSURE CONTROL SOLENOID A
TM-129
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
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P0745 PRESSURE CONTROL SOLENOID A
Description
INFOID:0000000009948983
• Line pressure solenoid valve is installed to control valve.
• Line pressure solenoid valve adjusts oil pump discharge pressure to optimum level according to the driving
conditions.
• The adoption of an N/H type (normal high) line pressure solenoid valve enables generation of a control oil
pressure when a voltage is not applied to the coil.
DTC Logic
INFOID:0000000009948984
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.
Drive the vehicle for 10 seconds or more.
3.
Stop the vehicle.
4.
Select “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT”.
Is “P0745” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009948985
1.
CHECK LINE PRESSURE SOLENOID VALVE CIRCUIT
1.
Turn ignition switch OFF.
2.
Check resistance between TCM connector terminal and ground.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0745
Pressure Control Solenoid A
• Monitor voltage value of TCM line pres-
sure solenoid valve is less than 70% of
the target voltage value of line pressure
solenoid valve
• Current monitor value of the Line pres-
sure solenoid valve differs from the TCM
current command value of line pressure
solenoid valve
• Harness or connectors
(Line pressure solenoid valve circuit is
open or shorted.)
• Line pressure solenoid valve
TCM connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
E18
1
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-130
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
P0745 PRESSURE CONTROL SOLENOID A
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-40, "Intermittent Incident"
.
NO
>> GO TO 2.
2.
CHECK LINE PRESSURE SOLENOID VALVE
1.
Disconnect CVT unit connector.
2.
Check Line pressure solenoid valve. Refer to
TM-130, "Component Inspection (Line Pressure Solenoid
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Line pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
.
3.
CHECK HARNESS BETWEEN TCM AND CVT UNIT (LINE PRESSURE 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 (LINE PRESSURE 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.
Component Inspection (Line Pressure Solenoid Valve)
INFOID:0000000009948986
1.
CHECK LINE PRESSURE SOLENOID VALVE
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Line pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
.
TCM vehicle side harness connector
CVT unit vehicle side harness connector
Continuity
Connector
Terminal
Connector
Terminal
E18
1
F24
2
Existed
TCM vehicle side harness connector
Ground
Continuity
Connector
Terminal
E18
1
Not existed
CVT unit harness connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
F24
2
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
P0746 PRESSURE CONTROL SOLENOID A
TM-131
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
C
E
F
G
H
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J
K
L
M
A
B
TM
N
O
P
P0746 PRESSURE CONTROL SOLENOID A
Description
INFOID:0000000009948987
• When an abnormal gear ratio is detected on the LOW side due to a low line pressure with the line pressure
solenoid valve electrically normal, this phenomenon is judged as a malfunction.
• 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:0000000009948988
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 “ENG SPEED”, “PRI SPEED” and “VEHICLE SPEED”.
4.
Drive the vehicle.
5.
Maintain the following conditions for 1 seconds or more.
6.
Stop the vehicle.
7.
Select “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT”.
Is “P0746” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009948989
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 LINE PRESSURE SOLENOID VALVE
1.
Turn ignition switch OFF.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0746
Pressure Control Solenoid A
Performance/Stuck Off
TCM detects a state that gear ratio is more
than 2.9
• Line pressure control system
• Line pressure solenoid valve
• Primary speed sensor
• Secondary speed sensor
ENG SPEED
: More than 600 rpm
PRI SPEED
: More than 500 rpm
VEHICLE SPEED
: More than 10 km/h (7 MPH)
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