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Home >> Nissan-Datsun >> 2002 >> Sentra SE-R Spec V >> Repair and Diagnosis >> External Pages >> Different car >> Section 1957 (Engine Control System - VK45DE) >> DTC P1780: Shift Change Signal >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti FX45. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC WITH TCM 

    Check DTC with TCM. Refer to "TROUBLE DIAGNOSIS ".

    OK or NG

    1. OK: GO TO 2.
    2. NG: Perform trouble shooting relevant to DTC indicated.
  2. CHECK TCM FUNCTION 

    Refer to "TROUBLE DIAGNOSIS ".

    OK or NG

    1. OK: GO TO 3.
    2. NG: Replace TCM. Refer to "PRECAUTIONS ".
  3. REPLACE ECM 
    1. Replace ECM.
    2. Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to "ECM RE-COMMUNICATING FUNCTION ".
    3. Perform "VIN REGISTRATION  ".
    4. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING  ".
    5. Perform "THROTTLE VALVE CLOSED POSITION LEARNING  ".
    6. Perform "IDLE AIR VOLUME LEARNING  ".
      1. : INSPECTION END 
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