Nissan Teana J32. Manual - part 1137

TM-72

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRESSURE 

SOLENOID VALVE)

P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRES-
SURE SOLENOID VALVE)

Description

INFOID:0000000003848998

The pressure control solenoid valve B (secondary pressure solenoid valve) regulates the oil pump discharge
pressure to suit the driving condition in response to the signal sent from the TCM.

DTC Logic

INFOID:0000000003848999

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Start engine.

2.

Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

3.

Perform “Self-Diagnostic Results” mode for “TRANSMISSION”.

With GST

Follow the procedure “With CONSULT-III”.

Is “P0778 PRS CNT SOL/B CIRC” detected?

YES

>> Go to 

TM-72, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003849000

1.

CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)

CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector.

3.

Check resistance between TCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES 

>> GO TO 5.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TCM AND PRESSURE CONTROL SOLENOID VALVE B (SECONDARY

PRESSURE SOLENOID VALVE) (PART 1)

1.

Disconnect CVT unit connector.

2.

Check continuity between TCM vehicle side harness connector terminal and CVT unit vehicle side har-
ness connector terminal.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0778

PRS CNT SOL/B CIRC

• Normal voltage is not applied to solenoid 

due to cut line, short, etc.

• TCM detects as irregular by comparing 

target value with monitor value.

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Pressure control solenoid valve B (sec-

ondary pressure solenoid valve)

TCM vehicle side harness connector

Ground

Resistance (Approx.)

Connector

Terminal

F23

39

3.0 – 9.0 

Ω

P0778 PRESSURE CONTROL SOLENOID B ELECTRICAL (SEC PRESSURE 

SOLENOID VALVE)

TM-73

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK HARNESS BETWEEN TCM AND PRESSURE CONTROL SOLENOID VALVE B (SECONDARY

PRESSURE SOLENOID VALVE) (PART 2)

Check continuity between TCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)

Check pressure control solenoid valve B (secondary pressure solenoid valve). Refer to 

TM-73, "Component

Inspection [Pressure Control Solenoid Valve B (Secondary Pressure Solenoid Valve)]"

.

Is the inspection result normal?

YES 

>> GO TO 5.

NO

>> Replace transaxle assembly. Refer to 

TM-168, "Exploded View"

.

5.

DETECT MALFUNCTIONING ITEMS

Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> Replace TCM. Refer to 

TM-153, "Exploded View"

.

NO

>> Repair or replace damaged parts.

Component Inspection [Pressure Control Solenoid Valve B (Secondary Pressure So-
lenoid Valve)]

INFOID:0000000003849001

1.

CHECK PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)

Check resistance between CVT unit connector terminal and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace transaxle assembly. Refer to 

TM-168, "Exploded View"

.

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

39

F24

3

Existed

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

39

Not existed

CVT unit connector

Ground

Resistance (Approx.)

Connector

Terminal

F24

3

3.0 – 9.0 

Ω

TM-74

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE SEN-

SOR)

P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE
SENSOR)

Description

INFOID:0000000003849002

The transmission fluid pressure sensor A (secondary pressure sensor) detects secondary pressure of CVT
and sends the signal to the TCM.

DTC Logic

INFOID:0000000003849003

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
Immediately after performing any “DTC CONFIRMATION PROCEDURE”, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “Data Monitor” mode for “TRANSMISSION”.

3.

Make sure that output voltage of CVT fluid temperature sensor is within the range below.

4.

Start engine and wait for at least 5 consecutive seconds.

With GST

Follow the procedure “With CONSULT-III”.

Is “P0840 TR PRS SENS/A CIRC” detected?

YES

>> Go to 

TM-74, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003849004

1.

CHECK INPUT SIGNAL

1.

Start engine.

2.

Check voltage between TCM connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 2.

2.

CHECK POWER AND SENSOR GROUND

Check voltage between TCM connector terminals.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0840

TR PRS SENS/A CIRC

Signal voltage of the transmission fluid pres-
sure sensor A (secondary pressure sensor) 
is too high or too low while driving.

• Harness or connectors

(Sensor circuit is open or shorted.)

• Transmission fluid pressure sensor A 

(secondary pressure sensor)

ATF TEMP SEN

: 1.0 – 2.0 V

If it is out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the voltage 
(cool down the fluid)

TCM connector

Ground

Condition

Voltage (Approx.)

Connector

Terminal

F23

15

“N” position idle

1.0 - 1.5 V

P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE SEN-

SOR)

TM-75

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 5.

3.

CHECK HARNESS BETWEEN TCM AND CVT UNIT [TRANSMISSION FLUID PRESSURE SENSOR A

(SECONDARY PRESSURE SENSOR)] (PART 1)

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector and CVT unit connector.

3.

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 [TRANSMISSION FLUID PRESSURE SENSOR A

(SECONDARY PRESSURE SENSOR)] (PART 2)

Check continuity between TCM vehicle side harness connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

5.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (SENSOR POWER AND SENSOR GROUND) (PART

1)

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector and CVT unit connector.

3.

Check continuity between TCM vehicle side harness connector terminals and CVT unit vehicle side har-
ness connector terminals.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace damaged parts.

6.

CHECK HARNESS BETWEEN TCM AND CVT UNIT (SENSOR POWER AND SENSOR GROUND) (PART

2)

Check continuity between TCM vehicle side harness connector terminals and ground.

TCM connector

Voltage (Approx.)

Connector

Terminal

(+)

(-)

F23

26

25

4.75 - 5.25 V

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

15

F24

23

Existed

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

15

Not existed

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

25

F24

19

Existed

26

20