Nissan Teana J32. Manual - part 1139

TM-80

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE SEN-

SOR)

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE
SENSOR)

Description

INFOID:0000000003849010

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

DTC Logic

INFOID:0000000003849011

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 line 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 “P0845 TR PRS SENS/B CIRC” detected?

YES

>> Go to 

TM-80, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003849012

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 SENSOR POWER AND SENSOR GROUND

Check voltage between TCM connector terminals.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0845

TR PRS SENS/B CIRC

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

• Harness or connectors

(Sensor circuit is open or shorted.)

• Transmission fluid pressure sensor B (pri-

mary 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

14

“N” position idle

0.5 - 0.8 V

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE SEN-

SOR)

TM-81

< 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 B

(PRIMARY 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 B

(PRIMARY 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 terminal 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

25

26

4.75 - 5.25 V

TCM vehicle side harness connector

CVT unit vehicle side harness connector

Continuity

Connector

Terminal

Connector

Terminal

F23

14

F24

25

Existed

TCM vehicle side harness connector

Ground

Continuity

Connector

Terminal

F23

14

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

TM-82

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI 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-80, "DTC Logic"

.

Is “P0845 TR PRS SENS/B 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

P0868 SECONDARY PRESSURE DOWN

TM-83

< COMPONENT DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

P0868 SECONDARY PRESSURE DOWN

Description

INFOID:0000000003849013

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

DTC Logic

INFOID:0000000003849014

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.

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

4.

Start engine and maintain the following conditions for at least 10 consecutive seconds.

Is “P0868 SEC/PRESS DOWN” detected?

YES

>> Go to 

TM-83, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-35, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000003849015

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 PRESSURE CONTROL SOLENOID VALVE B (SECONDARY PRESSURE SOLENOID VALVE)

1.

Turn ignition switch OFF.

2.

Disconnect CVT unit connector.

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0868

SEC/PRESS DOWN

Secondary fluid pressure is too low com-
pared with the commanded value while driv-
ing.

• Harness or connectors

(Solenoid circuit is open or shorted.)

• Pressure control solenoid valve B (sec-

ondary pressure solenoid valve) system

• Transmission fluid pressure sensor A 

(secondary pressure sensor)

• Line pressure control system

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)

VEHICLE SPEED (accelerate slow-
ly)

: 0 

→

 50 km/h (31 MPH)

ACC PEDAL OPEN

: 0.5/8 – 1.0/8

RANGE

: “D” position