Nissan Versa (N17): P0847 Transmission fluid pressure SEN/SW B

Nissan Versa 2nd generation (N17) Service Manual / Transmission & driveline / Transaxle & transmission (TM) / P0847 Transmission fluid pressure SEN/SW B

DTC Logic

DTC DETECTION LOGIC

DTC Trouble diagnosis name DTC detection condition Possible causes
P0847 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: −20C (−4F) or more

- 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

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.

FLUID TEMP : −19C (−2.2F) or more

With GST

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

    CAUTION: When the ambient temperature is −20C (−4F) 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 "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

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?

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 harness connector terminal and ground. 

Is the inspection result normal?

YES >> Check intermittent incident. Refer to GI "Intermittent Incident".

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

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/Per ...

P0848 Transmission fluid pressure SEN/SW B

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