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Nissan Versa
 Sedan Service Manual
Transmission & driveline » Transaxle & transmission (TM) » P0744 Torque converter
DTC Logic

DTC DETECTION LOGIC

DTC Trouble diagnosis name DTC detection condition Possible causes
P0744 Torque converter clutch circuit intermittent The torque converter slip speed is at or above a set value (40 rpm + (Vehicle speed / 2) continuously for 30 seconds or more under the following diagnosis conditions:

- Diagnosis conditions

- Selector lever: "D" position

- Accelerator pedal position: 1.0/8 or more

- Vehicle speed: 10 km/h (6 MPH) or more

- Engine speed: 450 rpm or more

- CVT fluid temperature: 20C (68F) ≤ CVT fluid temperature ≤ 180C (356F)

- Lockup command is being given (except for slip lockup).

- LU PRS: More than 0.2 MPa

- TCM power supply voltage: More than 11 V

- Torque converter clutch solenoid valve

- Control valve assembly

- Torque converter

DTC CONFIRMATION PROCEDURE

CAUTION: Be careful of the driving speed.

1.PREPARATION BEFORE OPERATION 1

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.PREPARATION BEFORE OPERATION 2

With CONSULT

  1. Start the engine.
  2. Select "Data Monitor" in "TRANSMISSION".
  3. Select "FLUID TEMP".
  4. Confirm that the CVT fluid temperature is in the range below.

FLUID TEMP : 20C (68F) or more

With GST

  1. Start the engine.
  2. Set the CVT fluid to 20C (68F) or more.

    NOTE: When the ambient temperature is 20C (68F), the CVT fluid usually increases to 50 to 80C (122 to 176F) with driving in an urban area for approximately 10 minutes.

Is the CVT fluid 20C (68F) or more?

YES >> GO TO 3.

NO >> 1. Warm the transaxle.  2. GO TO 3.

3.CHECK DTC DETECTION

  1. Drive the vehicle.
  2. Maintain the following conditions for 40 seconds or more.

Selector lever : "D" position

Accelerator pedal position : 1.0/8 or more

Vehicle speed : 40 km/h (25 MPH) or more

    3.   Stop the vehicle.

    4.   Check the first trip DTC.

Is "P0744" detected?

YES >> Go to TM "Diagnosis Procedure".

NO >> INSPECTION END

    More about «P0744 Torque converter»:

    DTC Logic

    Diagnosis Procedure

    Nissan Versa Sedan Service Manual / Transmission & driveline / Transaxle & transmission (TM) / P0744 Torque converter / DTC Logic

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