Nissan X-Trail 32. Manual - part 2159

TM-594

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

P0776 PRESSURE CONTROL SOLENOID B

P0776 PRESSURE CONTROL SOLENOID B

DTC Description

INFOID:0000000010622815

DTC DETECTION LOGIC

POSSIBLE CAUSE

Secondary pressure solenoid valve

FAIL-SAFE

• When a malfunction occurs on the low oil pressure side
- Selector shock is large
- Start  is  slow
- Acceleration is slow
- Lock-up is not performed
- Vehicle speed is not increased
• When a malfunction occurs on the high oil pressure side
- Selector shock is large
- Start  is  slow
- Acceleration is slow
- Lock-up is not performed

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0776

PC SOLENOID B
(Pressure Control Solenoid “B” Performance/
Stuck Off)

When any of 1 or 2 is satisfied and this state is maintained for 10 sec-
onds:
1.

When all of the following conditions are satisfied:

-

DTC other than the applicable DTC is not detected.

-

Engine speed: More than 625 rpm

-

Selector lever: Other than P/N position

-

CVT fluid temperature: More than -20

°

C (-4

°

F)

-

TCM power supply: More than 11 V

-

The difference between instruction pressure of secondary pressure 
and 10-msec-ago instruction secondary pressure is 0 MPa or more

-

Instruction pressure of secondary pressure: 0 MPa or more

-

Instruction pressure of secondary pressure - secondary pressure: 
More than 1.2 MPa

-

When all of the following conditions are satisfied and this state is 
maintained for 1.52 seconds:

•

DTC other than the applicable DTC is not detected.

•

CVT fluid temperature: More than -20

°

C (-4

°

F)

•

Selector lever: Other than P/N position

•

Instruction pressure of secondary pressure 

−

 secondary pressure: 

0.25 MPa or more

2.

When all of the following conditions are satisfied:

-

DTC other than the applicable DTC is not detected.

-

CVT fluid temperature: More than -20

°

C (-4

°

F)

-

Selector lever: Other than P/N position

-

TCM power supply: More than 11 V

-

When all of the following conditions are satisfied and this state is 
maintained for 5.5 seconds:

•

DTC other than the applicable DTC is not detected.

•

CVT fluid temperature: More than -20

°

C (-4

°

F)

•

Selector lever: Other than P/N position

•

Secondary pressure - instruction pressure of secondary pressure: 
1.2 MPa or more

-

The difference between instruction pressure of secondary pressure 
and 10-msec-ago instruction secondary pressure is 0 MPa or more

-

Secondary pressure - instruction pressure of secondary pressure: 
More than 1.2 MPa

P0776 PRESSURE CONTROL SOLENOID B

TM-595

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

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.

CHECK DTC DETECTION

1.

Start the engine.

2.

Drive the vehicle.

3.

Maintain the following condition for 20 seconds or more.

4.

Stop the vehicle.

5.

Check the first trip DTC.

Is “P0776” detected?

YES

>> Go to 

TM-595, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010622816

1.

REPLACE TRANSAXLE ASSEMBLY

Replace transaxle assembly. Refer to 

TM-704, "Removal and Installation"

.

>> WORK END

Selector lever

: “D” position

Vehicle speed

: 40 km/h (25 MPH) or more

Accelerator pedal position

: 1.0/8 or more

TM-596

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

P0778 PRESSURE CONTROL SOLENOID B

P0778 PRESSURE CONTROL SOLENOID B

DTC Description

INFOID:0000000010622817

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connector (Secondary pressure solenoid valve circuit is shorted to ground)
• Secondary pressure solenoid valve

FAIL-SAFE

• Selector shock is large
• Start  is  slow
• Acceleration is slow
• Lock-up is not performed

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe 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.

CHECK DTC DETECTION

1.

Start the engine and wait for 5 seconds or more.

2.

Check the first trip DTC.

Is “P0778” detected?

YES

>> Go to 

TM-596, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010622818

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 damaged parts.

2.

CHECK SECONDARY PRESSURE SOLENOID VALVE CIRCUIT

Check continuity between CVT unit harness connector terminal and ground. 

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0778

PC SOLENOID B
(Pressure Control Solenoid “B” Electrical)

When all of the following conditions are satisfied and this state is maintained 
for 0.48 seconds:
• TCM power supply voltage: More than 11 V
• TCM judges that solenoid valve circuit is shorted to ground.

TCM

—

Continuity

Connector

Terminal

F119

39

Ground

Not existed

P0778 PRESSURE CONTROL SOLENOID B

TM-597

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Is the inspection result normal?

YES >> INSPECTION 

END

NO

>> There is malfunction of secondary pressure solenoid valve. Replace transaxle assembly. Refer to

TM-704, "Removal and Installation"

.

CVT unit

—

Condition

Resistance

Connector

Terminal

F250

3

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