Nissan Qashqai (2007-2010). Manual - part 581

P0841 PRESSURE SENSOR FUNCTION

TM-259

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

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3.

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

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

TM-260, "Descrip-

tion"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace damaged parts.

4.

CHECK LINE PRESSURE SOLENOID VALVE

Check line pressure solenoid valve. Refer to 

TM-245, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace damaged parts.

5.

CHECK SECONDARY PRESSURE SOLENOID VALVE

Check secondary pressure solenoid valve. Refer to 

TM-251, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace damaged parts.

6.

CHECK STEP MOTOR

Check step motor. Refer to 

TM-277, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair or replace damaged parts.

7.

CHECK TCM

Check TCM input/output signals. Refer to 

TM-285, "Reference Value"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> Replace TCM. Refer to 

TM-325, "Exploded View"

.

TM-260

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE SEN-

SOR)

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE
SENSOR)

Description

INFOID:0000000000988704

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

DTC Logic

INFOID:0000000000988705

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

NOTE:
If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch
OFF and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

1.

CHECK DTC DETECTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

 Select “DATA MONITOR”.

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-260, "Diagnosis Procedure"

.

NO

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

Diagnosis Procedure

INFOID:0000000000988706

1.

CHECK INPUT SIGNAL

1.

Start engine.

2.

Check voltage between TCM connector terminal and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 2.

2.

CHECK HARNESS BETWEEN TCM AND TRANSMISSION FLUID PRESSURE SENSOR B (PRIMARY

DTC

Item

(CONSULT-III screen term)

Malfunction is detected when...

Possible cause

P0845

TR PRS SENS/B CIRC

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

• Transmission fluid pressure 

sensor B (Primary pressure 
sensor)

• Harness or connectors

(Sensor circuit is open or 
shorted.)

ATF TEMP SEN

: 1.0 – 2.0 V

If 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

F25

14

“N” position idle

0.7 – 3.5 V

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE SEN-

SOR)

TM-261

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

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PRESSURE SENSOR)

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector and CVT unit harness connector.

3.

Check continuity between TCM connector terminal and CVT unit harness connector terminal.

4.

If OK, check harness for short to ground and short to power.

5.

Reinstall any part removed.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

CHECK SENSOR POWER AND SENSOR GROUND

1.

Connect TCM connector.

2.

Turn ignition switch ON.

3.

Check voltage between CVT unit harness connector terminals.

4.

Reinstall any part removed.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

 CHECK HARNESS BETWEEN TCM AND CVT UNIT HARNESS CONNECTOR (SENSOR POWER AND

SENSOR GROUND)

1.

Turn ignition switch OFF.

2.

Disconnect TCM connector.

3.

Check continuity between TCM connector terminals and CVT unit harness connector terminals.

4.

If OK, check harness for short to ground and short to power.

5.

Reinstall any part removed.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

 CHECK THE TCM SHORT

Replace same type TCM, perform self-diagnosis check. Erase self-diagnostic results and then start engine
perform self-diagnosis check. Refer to 

TM-260, "DTC Logic"

.

 Is “P0845 TR PRS SENS/B CIRC” detected again?

YES

>> Replace the transaxle assembly. Refer to 

TM-340, "Exploded View"

.

NO

>> Replace the TCM. Refer to 

TM-325, "Exploded View"

.

6.

CHECK TCM

Check TCM input/output signals. Refer to 

TM-285, "Reference Value"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

TCM connector

CVT unit harness connector

Continuity

Connector

Terminal

Connector

Terminal

F25

14

F24

25

Existed

CVT unit harness connector

Voltage (Approx.) 

Connector

Terminal

F24

19

20

5.0 V

TCM connector

CVT unit harness connector

Continuity

Connector

Terminal

Connector

Terminal

F25

25

F24

19

Existed

26

20

TM-262

< COMPONENT DIAGNOSIS >

[CVT: RE0F10A]

P0845 TRANSMISSION FLUID PRESSURE SENSOR B (PRI PRESSURE SEN-

SOR)

NO

>> Replace TCM. Refer to 

TM-325, "Exploded View"

.