Nissan Sentra. Manual - part 889

TM-192

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

P0846 TRANSMISSION FLUID PRESSURE SEN/SW B

P0846 TRANSMISSION FLUID PRESSURE SEN/SW B

DTC Logic

INFOID:0000000009759432

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Be careful of the driving speed.

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. Shift the selector lever to “D” position.

3. Drive the vehicle at a constant velocity of 40 km/h (25 MPH) at lease for 10 seconds.

CAUTION:

At the same time, the accelerator pedal angle must be maintained constant.

4. Stop the vehicle.

5. Check the first trip DTC.
Is “P0846”detected?

YES

>> Go to 

TM-192, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009759433

1.

CHECK TCM INPUT SIGNAL

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible causes

P0846

TRANSMISSION FLUID 
PRESSURE SEN/SW B
(Transmission Fluid Pressure 
Sensor/Switch B Circuit 
Range/Performance)

The detection conditions continuously for 5 
seconds or more under the following diagnosis 
conditions:
• Diagnosis conditions
- Selector lever: “D” position
- The primary pulley speed experienced 306 

rpm or more and the secondary pulley 
speed experienced 230 rpm or more at least 
once.

- Stop lamp switch: OFF
- Wheel spin is not being detected.
- The rate of change in pulley ratio: Between 

−0.09 and +0.09 inclusive

- Solenoid valve output current: 750 mA or 

more

- GND short diagnosis of the solenoid valve 

circuit is not satisfied. 

- TCM power supply voltage: More than 11 V
• Detection conditions
- After the value of “Actual secondary pres-

sure 

− Target secondary pressure” exceeds 

0.675 MPa:

• The rate of change in vehicle speed [km/h 

(MPH)]: Between 

−49 (−30) and +49 (+30) 

inclusive

• The rate of change in accelerator pedal an-

gle: Between 

−1.3/8 and +1.3/8 inclusive

• Secondary pressure sensor
• Control valve assembly

P0846 TRANSMISSION FLUID PRESSURE SEN/SW B

TM-193

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

1. Start the engine.

2. Check voltage between TCM connector terminal and ground.

Is the inspection result normal?

YES 

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

>> There is a malfunction of secondary pressure sensor value. Replace transaxle assembly. Refer to

TM-283, "Removal and Installation"

.

TCM

—

Condition

Voltage

(Approx.)

Connector

Terminal

F23

16

Ground

• Selector lever: “N” position
• At idle

0.88 – 0.92 V

TM-194

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

P0847 TRANSMISSION FLUID PRESSURE SEN/SW B

P0847 TRANSMISSION FLUID PRESSURE SEN/SW B

DTC Logic

INFOID:0000000009759434

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

With CONSULT

1. Start the engine.

2. Select “Data Monitor” in “TRANSMISSION”.

3. Select “FLUID TEMP”.

4. Maintain the following conditions for 10 seconds or more.

5. Check the first trip DTC.

With GST

1. Start the engine and wait for at least 10 seconds.

CAUTION:

When the ambient temperature is 

−20°C (−4°F) or less and the engine is cold, warm up the engine

for approximately 5 minutes. 

2. Check the first trip DTC.
Is “P0847”detected?

YES

>> Go to 

TM-194, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009759435

1.

CHECK CIRCUIT BETWEEN TCM AND CVT UNIT (PART 1)

1. Turn ignition switch OFF.

2. Disconnect TCM connector and CVT unit connector.

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

Is the inspection result normal?

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

Possible causes

P0847

TRANSMISSION FLUID 
PRESSURE SEN/SW B
(Transmission Fluid Pressure 
Sensor/Switch B Circuit Low)

The secondary pressure sensor voltage is 
0.09 V or less continuously for 5 seconds or 
more under the following diagnosis conditions:
• Diagnosis conditions
- CVT fluid temperature: More than 

−20°C (−

4

°F)

- TCM power supply voltage: More than 11 V

• Harness or connector

(Secondary pressure sensor circuit is 
open or shorted to ground) 

• Secondary pressure sensor 
• Control valve assembly

FLUID TEMP

: 

−19°C (−2.2°F) or more

TCM

CVT unit

Continuity

Connector

Terminal

Connector

Terminal

F23

11

F46

25

Existed

16

14

26

16

P0847 TRANSMISSION FLUID PRESSURE SEN/SW B

TM-195

< DTC/CIRCUIT DIAGNOSIS >

[CVT: RE0F11A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

YES 

>> GO TO 2.

NO

>> Repair or replace malfunctioning parts.

2.

CHECK CIRCUIT BETWEEN TCM AND CVT UNIT (PART 2)

Check continuity between TCM harness connector terminals and ground.

Is the inspection result normal?

YES 

>> GO TO 3.

NO

>> Repair or replace malfunctioning parts.

3.

CHECK TCM INPUT SIGNALS

1. Connect all connectors removed. 

2. Start the engine.

3. Check voltage between TCM connector terminal and ground. 

Is the inspection result normal?

YES 

>> Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

NO

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

TM-

283, "Removal and Installation"

.

TCM

—

Continuity

Connector

Terminal

F23

16

Ground

Not existed

26

+

-

Condition

Voltage

TCM

Connector

Terminal

F23

16

Ground

• Selector lever: “N” position
• At  idle

0.88 – 0.92 V