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Nissan Sentra B18 (2020-2025) Service Manual: P0740-00 Torque Converter

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0740

00

TORQUE CONVERTER

(Torque Converter Clutch Circuit/Open)

Diagnosis condition

Power supply voltage ≥ 10 V

Signal

Torque converter clutch solenoid drive signal

Threshold

Solenoid drive circuit is diagnosed as open

Diagnosis delay time

0.2 seconds

POSSIBLE CAUSE

  • Harness or connector

  • Torque converter clutch solenoid

  • TCM

FAIL-SAFE

  • Start is slow

  • Acceleration is slow

  • Lock-up is not performed

  • Stop/start system prohibited

DTC CONFIRMATION PROCEDURE

  1. PREPARATION BEFORE WORK

    If another "DTC CONFIRMATION PROCEDURE" occurs just before, ignition switch OFF and wait for at least 10 seconds, then perform the next test.

    TESTING CONDITION:

    Before performing the following procedure, confirm that battery voltage is more than 10 V.

    >>

    GO TO 2.

  2. CHECK DTC DETECTION

    1. Start the engine.

    2. Drive the Nissan Sentra vehicle and maintain the following conditions for 10 seconds or more.

      Shift position

      : "D" position

      CVT fluid temperature

      : 20 °C (68 °F) or more

      Nissan Sentra Vehicle speed

      : 40 km/h (25 MPH) or more

      CAUTION:

      Be careful of the driving speed.

    3. Stop the Nissan Sentra vehicle.

    4. Check the DTC.

    Is "P0740-00" detected?

    YES >>

    Proceed to Diagnosis Procedure.

    NO-1>>

    To check malfunction symptom before repair: Refer to Intermittent Incident.

    NO-2>>

    Confirmation after repair: INSPECTION END

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT

    Check torque converter clutch solenoid circuit. Refer to Diagnosis Procedure.

    Is the inspection result normal?

    YES>>

    Replace TCM. Refer to Removal and Installation.

    NO >>

    Repair or replace damaged parts.

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