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Nissan Sentra B18 (2020-2025) Service Manual: P0742-00 Torque Converter

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content)

DTC detection condition

P0742

00

TORQUE CONVERTER CLUTCH

(Torque Converter Clutch Circuit Stuck On)

Diagnosis condition

Diagnosis is permitted when all of the following conditions are satisfied:

a) Shift position: D position (not manual mode)

b) Acceleration pedal opening angle ≥ 10 deg

c) 0 rpm < secondary pulley speed < 2000 rpm

d) Engine speed ≥ 450 rpm

e) Period satisfying the following e-1) is no longer than 0.02 sec.

e-1) Speed difference caused by clutch (Input speed - Primary pulley speed ≥ 50 rpm

f) The following "f-1" is satisfied for 5 sec or more.

f-1) Lock-up instruction pressure ≤ -0.1 MPa

g) Power supply voltage ≥ 10 V

h) Engine torque ≧ Approximately 30 Nm

Signal

—

Threshold

Absolute value of speed difference caused by T/C ≤ 40 rpm

Diagnosis delay time

5 seconds

POSSIBLE CAUSE

  • Harness or connector

  • Torque converter clutch solenoid

  • Control valve

  • Torque converter

  • TCM

FAIL-SAFE

  • Start is slow

  • Acceleration is slow

  • Engine stops when shift to “D” position during stopping the Nissan Sentra vehicle.

  • 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

      Accelerator pedal opening

      : 10 deg or more

      Nissan Sentra Vehicle speed

      : 1 - 15 km/h (0.6 - 9 MPH)

      Brake pedal

      : Depress*

      *: Keep depressing the brake pedal moderately not to accelrate the Nissan Sentra vehicle.

      CAUTION:

      Be careful of the driving speed.

    3. Stop the Nissan Sentra vehicle.

    4. Check the DTC.

    Is "P0742-00" detected?

    YES >>

    Proceed to DTC Diagnosis Procedure.

    NO-1>>

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

    NO-2>>

    Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. REPLACE TRANSAXLE ASSEMBLY

    Replace transaxle assembly. Refer to Removal and Installation.

    >>

    WORK END

    P0741-00 Torque Converter
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