Nissan Pathfinder. Manual - part 1168

P0776 PRESSURE CONTROL SOLENOID B

TM-131

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10E]

C

E

F

G

H

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K

L

M

A

B

TM

N

O

P

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.

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-131, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009177585

1.

CHECK INTERMITTENT INCIDNT

Refer to 

GI-49, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace transaxle assembly. Refer to 

TM-214, "Removal and Installation"

.

NO

>> Repair or replace the malfunction items.

Selector lever

: “D” position

Vehicle speed

: 40 km/h (25 MPH) or more

Accelerator pedal position

: 1.0/8 or more

TM-132

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10E]

P0778 PRESSURE CONTROL SOLENOID B

P0778 PRESSURE CONTROL SOLENOID B

DTC Logic

INFOID:0000000009177586

DTC DETECTION LOGIC

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-132, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009177587

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. 

Is the inspection result normal?

YES >> Check 

intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible cause

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 short-

ed to ground.

• Harness or connectors

(Secondary pressure solenoid valve 
circuit is shorted to ground.)

• Secondary pressure solenoid valve

TCM

—

Continuity

Connector

Terminal

F15

39

Ground

Not existed

CVT unit

—

Condition

Resistance

Connector

Terminal

F209

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

P0778 PRESSURE CONTROL SOLENOID B

TM-133

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10E]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

NO

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

Refer to 

TM-214, "Removal and Installation"

.

TM-134

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10E]

P0779 PRESSURE CONTROL SOLENOID B

P0779 PRESSURE CONTROL SOLENOID B

DTC Logic

INFOID:0000000009177588

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

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 conditions for 5 seconds or more.

4. Stop the vehicle.

5. Check the first trip DTC.
Is “P0779” detected?

YES

>> Go to 

TM-134, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009177589

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 damaged parts.

2.

CHECK SECONDARY PRESSURE SOLENOID VALVE CIRCUIT

Check continuity between CVT unit harness connector terminal and ground. 

DTC

Trouble diagnosis name

DTC detection condition

Possible causes

P0779

Pressure control solenoid B 
Intermittent

When all of the following conditions are satis-
fied and this state is maintained for 0.2 sec-
onds:
• TCM power supply voltage: More than 11 V
• P0778 is not detected
• TCM judges that solenoid valve circuit is 

open or shorted to power supply.

• Harness or connector

(Secondary pressure solenoid valve 
circuit open or shorted to power supply)

• Secondary pressure solenoid valve

Selector lever

: “D” position

Vehicle speed

: 40 km/h (25 MPH) or more

TCM

CVT unit

Continuity

Connector

Terminal

Connector

Terminal

F15

39

F46

3

Existed