Nissan Cube. Instruction — part 969
TM-132
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
P0746 PRESSURE CONTROL SOLENOID A
2.
Disconnect CVT unit harness connector.
3.
Check line pressure solenoid valve. Refer to
TM-132, "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 PRIMARY SPEED SENSOR SYSTEM
Check primary speed sensor system. Refer to
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
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 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 (Line Pressure Solenoid Valve)
INFOID:0000000009948990
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
.
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
P0776 PRESSURE CONTROL SOLENOID B
TM-133
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P0776 PRESSURE CONTROL SOLENOID B
Description
INFOID:0000000009948991
• This is detected when secondary pressure solenoid valve is electrically normal and secondary pressure is
low.
• 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:0000000009948992
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”, “VIGN SEN”, “ATF TEMP SEN”, “ACC PEDAL OPEN” and “VEHICLE SPEED”.
4.
Drive the vehicle.
5.
Maintain the following conditions for 30 seconds or more.
6.
Stop the vehicle.
7.
Select “Self Diagnostic Results” in “TRANSMISSION”.
With GST
Follow the procedure “With CONSULT”.
Is “P0776” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009948993
1.
CHECK LINE PRESSURE
Perform line pressure test. Refer to
TM-209, "Inspection and Judgment"
.
Is the inspection result normal?
YES
>> GO TO 2.
DTC
Trouble diagnosis name
DTC is detected if...
Possible cause
P0776
Pressure Control Solenoid B
Performance/Stuck Off
Difference of secondary pressure target val-
ue of TCM and secondary pressure actual
value is more than 1.2 MPa
• Secondary pressure solenoid valve sys-
tem
• Line pressure control system
• Secondary pressure solenoid valve
• Secondary pressure sensor
RANGE
: D
VIGN SEN
: More than 10 V
ATF TEMP SEN
: 2.03 – 0.16 V
ACC PEDAL OPEN
: More than 1.0/8
VEHICLE SPEED
: More than 10 km/h (7 MPH)
TM-134
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
P0776 PRESSURE CONTROL SOLENOID B
NO
>> Repair or replace damaged parts. Refer to
TM-209, "Inspection and Judgment"
.
2.
CHECK SECONDARY PRESSURE SOLENOID VALVE
1.
Turn ignition switch OFF.
2.
Disconnect CVT unit harness connector.
3.
Check secondary pressure solenoid valve. Refer to
TM-134, "Component Inspection (Secondary Pres-
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Secondary pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
3.
CHECK SECONDARY PRESSURE SENSOR SYSTEM
Check secondary pressure sensor system. Refer to
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
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 (Secondary Pressure Solenoid Valve)
INFOID:0000000009948994
1.
CHECK SECONDARY PRESSURE SOLENOID VALVE
Check resistance between CVT unit harness connector terminal and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Secondary pressure solenoid valve is malfunctioning. Replace transaxle assembly. Refer to
CVT unit harness connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
F24
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
P0778 PRESSURE CONTROL SOLENOID B
TM-135
< DTC/CIRCUIT DIAGNOSIS >
[CVT: RE0F08B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
P0778 PRESSURE CONTROL SOLENOID B
Description
INFOID:0000000009948995
• Secondary pressure solenoid valve is installed to control valve.
• Secondary 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) secondary pressure solenoid valve enables generation of a con-
trol oil pressure when a voltage is not applied to the coil.
DTC Logic
INFOID:0000000009948996
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 “P0778” detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009948997
1.
CHECK SECONDARY 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
P0778
Pressure Control Solenoid B
Electrical
• Current monitor value of the secondary
pressure solenoid valve differs from the
TCM current command value of second-
ary pressure solenoid valve
• Secondary pressure solenoid valve cur-
rent command value of TCM and second-
ary pressure solenoid valve current
monitor value is deviated
• Harness or connectors
(secondary pressure solenoid valve cir-
cuit is open or shorted.)
• Secondary pressure solenoid valve
TCM connector
Ground
Condition
Resistance (Approx.)
Connector
Terminal
E18
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
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