LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2004 >> Altima S, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 896 (Continuously Variable Transmission (CVT)) >> DTC P0744 A/T TCC S/V Function (Lock-Up) >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK INPUT SIGNALS 

    With CONSULT-II 

    1. Start engine.
    2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-II.
    3. Start vehicle.
    4. Check if there is a great difference between "ENG SPEED SIG" and "PRI SPEED SEN". (Lock-up ON.)
    ENG SPEED SIG DISPLAY VALUE

    Item name Condition Display value
    ENG SPEED SIG Engine running Closely matches the tachometer reading.
    PRI SPEED SEN During driving (lock-up ON) Approximately matches the engine speed.
    Fig 1: CONSULT-II Display - DATA MONITOR
    G04916087Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  5.

    NG: GO TO  2.

  2. CHECK LINE PRESSURE 

    Perform line pressure test. Refer to "LINE PRESSURE TEST ".

    OK or NG 

    OK: GO TO  3.

    NG: Repair or replace damaged parts. Refer to "JUDGEMENT OF LINE PRESSURE TEST ".

    Fig 2: Checking Line Pressure
    G04901038Courtesy of NISSAN MOTOR CO., U.S.A.
  3. DETECT MALFUNCTIONING ITEM 

    Check the following:

    OK or NG 

    OK: GO TO  4.

    NG: Repair or replace damaged parts.

  4. CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM AND INPUT SPEED SENSOR (PRIMARY SPEED SENSOR) SYSTEM 

    Check output speed sensor (secondary speed sensor) system and input speed sensor (primary speed sensor) system. Refer to "DTC P0720 VEHICLE SPEED SENSOR CVT (SECONDARY SPEED SENSOR) ", "DTC P0715 INPUT SPEED SENSOR CIRCUIT (PRI SPEED SENSOR) ".

    OK or NG 

    OK: GO TO  5.

    NG: Repair or replace damaged parts.

  5. CHECK DTC 

    Perform "DTC Confirmation Procedure". Refer to "DTC CONFIRMATION PROCEDURE ".

    OK or NG 

    OK: INSPECTION END 

    NG: GO TO  6.

  6. CHECK TCM 
    1. Check TCM input/output signals. Refer to "TCM INPUT/OUTPUT SIGNAL REFERENCE VALUES ".
    2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.

    OK or NG 

    OK: INSPECTION END 

    NG:

    1. Repair or replace damaged parts.
    2. Replace the transaxle assembly. Refer to "REMOVAL AND INSTALLATION ".
scientia non olet · About LEMON Manuals