Nissan Teana J32. Manual - part 1138

TM-76

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0840 TRANSMISSION FLUID PRESSURE SENSOR A (SEC PRESSURE SEN-

SOR)

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

7.

CHECK TCM

1.

Replace with the same type of TCM. Refer to 

TM-153, "Exploded View"

.

2.

Connect each connector.

3.

Perform “DTC CONFIRMATION PROCEDURE”. Refer to 

TM-74, "DTC Logic"

.

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

YES

>> Replace transaxle assembly. Refer to 

TM-168, "Exploded View"

.

NO

>> Replace TCM. Refer to 

TM-153, "Exploded View"

.

8.

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.

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

25

Not existed

26

P0841 PRESSURE SENSOR FUNCTION

TM-77

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

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P0841 PRESSURE SENSOR FUNCTION

Description

INFOID:0000000003849005

Using the engine load (throttle position), the primary pulley revolution speed, and the secondary pulley revolu-
tion speed as input signals, TCM changes the operating pressure of the primary pulley and the secondary pul-
ley and changes the groove width of the pulley to control the gear ratio.

DTC Logic

INFOID:0000000003849006

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.

Turn ignition switch ON.

2.

Select “Data Monitor” mode for “TRANSMISSION”.

3.

Start engine and maintain the following conditions for at least 12 consecutive seconds.

Is “P0841 PRESS SEN/FNCTN” detected?

YES

>> Go to 

TM-77, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003849007

1.

CHECK LINE PRESSURE

Perform line pressure test. Refer to 

TM-146, "Inspection and Judgment"

.

Is the inspection result normal?

YES

>> .GO TO 2.

NO

>> Repair or replace damaged parts. Refer to 

TM-146, "Inspection and Judgment"

.

2.

CHECK TRANSMISSION FLUID PRESSURE SENSOR A (SECONDARY PRESSURE SENSOR) SYS-

TEM

Check transmission fluid pressure sensor A (secondary pressure sensor) system. Refer to 

TM-74, "Descrip-

tion"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace damaged parts.

3.

CHECK TRANSMISSION FLUID PRESSURE SENSOR B (PRIMARY PRESSURE SENSOR) SYSTEM

Check transmission fluid pressure sensor B (primary pressure sensor) system. Refer to 

TM-80, "Description"

.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0841

PRESS SEN/FNCTN

Correlation between the values of the trans-
mission fluid pressure sensor A (secondary 
pressure sensor) and the transmission fluid 
pressure sensor B (primary pressure sen-
sor) is out of specification.

• Harness or connectors

(Sensor circuit is open or shorted.)

• Transmission fluid pressure sensor A 

(secondary pressure sensor)

• Transmission fluid pressure sensor B (pri-

mary pressure sensor)

VEHICLE SPEED

: 40 km/h (25 MPH) or more

RANGE

: “D” position

TM-78

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0841 PRESSURE SENSOR FUNCTION

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE PRESSURE SOLENOID VALVE)

1.

Turn ignition switch OFF.

2.

Disconnect CVT unit connector.

3.

Check pressure control solenoid valve A (line pressure solenoid valve). Refer to 

TM-78, "Component

Inspection [Pressure Control Solenoid Valve A (Line Pressure Solenoid Valve)]"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

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

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

TM-78, "Component

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

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace damaged parts.

6.

CHECK STEP MOTOR SYSTEM

Check step motor system. Refer to 

TM-97, "Description"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

7.

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 A (Line Pressure Solenoid 
Valve)]

INFOID:0000000003849008

1.

CHECK PRESSURE CONTROL SOLENOID VALVE A (LINE 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"

.

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

INFOID:0000000003849009

1.

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

Check resistance between CVT unit connector terminal and ground.

CVT unit connector

Ground

Resistance (Approx.)

Connector

Terminal

F24

2

3.0 – 9.0 

Ω

CVT unit connector

Ground

Resistance (Approx.)

Connector

Terminal

F24

3

3.0 – 9.0 

Ω

P0841 PRESSURE SENSOR FUNCTION

TM-79

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

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A

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TM

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Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace transaxle assembly. Refer to 

TM-168, "Exploded View"

.