Nissan Versa (N17): P0846 Transmission fluid pressure SEN/SW B

Nissan Versa 2nd generation (N17) Service Manual / Transmission & driveline / Transaxle & transmission (TM) / P0846 Transmission fluid pressure SEN/SW B

DTC Logic

DTC DETECTION LOGIC

DTC Trouble diagnosis name DTC detection condition Possible causes
P0846 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.

- 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 pressure − 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 angle: Between −1.3/8 and +1.3/8 inclusive

 - Secondary pressure sensor

- Control valve assembly

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 "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK TCM INPUT SIGNAL

  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 "Intermittent Incident".

NO >> There is a malfunction of secondary pressure sensor value. Replace transaxle assembly. Refer to TM "Removal and Installation".

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P0847 Transmission fluid pressure SEN/SW B

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