Nissan Qashqai J11. Manual - part 744

P0779 PRESSURE CONTROL SOLENOID B

TM-551

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

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TM

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P0779 PRESSURE CONTROL SOLENOID B

DTC Logic

INFOID:0000000010245625

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-551, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010245626

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 CIRCUIT BETWEEN CVT UNIT AND GROUND

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

F1

39

F58

3

Existed

TM-552

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

P0779 PRESSURE CONTROL SOLENOID B

Is the inspection result normal?

YES >> Check 

intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

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

TM-653, "Removal and Installation"

.

CVT unit

—

Condition

Resistance

Connector

Terminal

F207

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

P0826 UP AND DOWN SHIFT SW

TM-553

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

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P0826 UP AND DOWN SHIFT SW

DTC Logic

INFOID:0000000010438739

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 (PART 1)

With CONSULT

1.

Start the engine.

2.

Shift the selector lever to “D” position and wait for 1 second or more.

3.

Select “Self Diagnostic Results” in “TRANSMISSION”.

Is “P0826” detected?

YES

>> Go to 

TM-553, "Diagnosis Procedure"

.

NO

>> GO TO 3.

3.

CHECK DTC DETECTION (PART 2)

With CONSULT

1.

Shift the selector lever to manual shift gate and wait for 1 second or more.

2.

Select “Self Diagnostic Results” in “TRANSMISSION”.

Is “P0826” detected?

YES

>> Go to 

TM-553, "Diagnosis Procedure"

.

NO

>> GO TO 4.

4.

CHECK DTC DETECTION (PART 3)

With CONSULT

1.

Shift the selector lever to “UP side (+ side)” and wait for 1 second or more.

2.

Select “Self Diagnostic Results” in “TRANSMISSION”.

Is “P0826” detected?

YES

>> Go to 

TM-553, "Diagnosis Procedure"

.

NO

>> GO TO 5.

5.

CHECK DTC DETECTION (PART 4)

With CONSULT

1.

Shift the selector lever to “DOWN side (

−

 side)” and wait for 1 second or more.

2.

Select “Self Diagnostic Results” in “TRANSMISSION”.

Is “P0826” detected?

YES

>> Go to 

TM-553, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010438740

1.

CHECK DTC (COMBINATION METER)

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible causes

P0826

UP/DOWN SHIFT SWITCH
(Up and Down Shift Switch 
Circuit)

TCM monitors manual mode, non-manual 
mode, up or down switch signal, and detects 
as irregular when impossible input pattern oc-
curs 1 second or more.

• Manual mode switch
• Harness or connectors

(Manual mode switch circuit are open 
or shorted.)

TM-554

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F10G]

P0826 UP AND DOWN SHIFT SW

With CONSULT

1.

Turn ignition switch ON.

2.

Select “Self Diagnostic Results” in “METER/M&A”.

Is any DTC detected?

YES

>> Check DTC detected item. Refer to 

TM-485, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK MANUAL MODE SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect CVT shift selector connector.

3.

Turn ignition switch ON.

4.

Check voltage between CVT shift selector harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK MANUAL MODE SWITCH

1.

Turn ignition switch OFF.

2.

Check manual mode switch. Refer to 

TM-555, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

4.

CHECK CIRCUIT BETWEEN CVT SHIFT SELECTOR AND COMBINATION METER

1.

Turn ignition switch OFF.

2.

Disconnect combination meter connector.

3.

Check continuity between CVT shift selector harness connector terminals and combination meter harness
connector terminals.

4.

Check continuity between CVT shift selector harness connector terminals and ground.

+

–

Condition

Voltage

(Approx.)

CVT shift selector

Connector

Terminal

M9

7

Ground

Ignition switch: ON

12 V

Ignition switch: OFF

0 V

8

Ignition switch: ON

12 V

Ignition switch: OFF

0 V

9

Ignition switch: ON

12 V

Ignition switch: OFF

0 V

11

Ignition switch: ON

12 V

Ignition switch: OFF

0 V

CVT shift selector

Combination meter

Continuity

Connector

Terminal

Connector

Terminal

M9

7

M51

30

Existed

8

33

9

32

11

31