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Home >> Nissan-Datsun >> 2008 >> Altima Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - Component Testing (Qr25DE Except Hybrid) (For CALIFORNIA) >> Ignition Signal >> Component Function Check
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Component Function Check

  1. INSPECTION START

    Turn ignition switch OFF, and restart engine.

    Does the engine start? 

    YES-1 : With CONSULT-III: GO TO 2.

    YES-2 : Without CONSULT-III: GO TO  3.

    NO : Go to "DIAGNOSIS PROCEDURE ".

  2. IGNITION SIGNAL FUNCTION

    With CONSULT-III 

    1. Perform "POWER BALANCE" in "ACTIVE TEST" mode with CONSULT-III.
    2. Make sure that each circuit produces a momentary engine speed drop.

    Is the inspection result normal? 

    YES : INSPECTION END

    NO : Go to "DIAGNOSIS PROCEDURE ".

  3. IGNITION SIGNAL FUNCTION

    Without CONSULT-III 

    1. Let engine idle.
    2. Read the voltage signal between ECM harness connector and ground.
      VOLTAGE REFERENCE CHART

      ECM Ground Voltage signal
      Connector Terminal
      F14 9 Ground
      G04886958Courtesy of NISSAN MOTOR CO., U.S.A.
      10
      11
      21
      NOTE: The pulse cycle changes depending on rpm at idle.

    Is the inspection result normal? 

    YES : INSPECTION END

    NO : Go to "DIAGNOSIS PROCEDURE ".