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Home >> Infiniti >> 2008 >> G37 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - G37 Coupe - System & Component Tests, Ecu & Symptom Diagnosis, Precautions & Preparation, On-Vehicle Repair, Service Data And Specifications >> Ignition Signal >> Component Function Check

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. CHECK 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. CHECK IGNITION SIGNAL FUNCTION

    Without CONSULT-III 

    1. Let engine idle.
    2. Read the voltage signal between ECM harness connector and ground with an oscilloscope.
      ECM CONNECTOR TERMINAL REFERENCE

      ECM Ground Voltage signal
      Connector Terminal
      F101 11 Ground
      G04886600Courtesy of NISSAN MOTOR CO., U.S.A.
      12
      15
      16
      19
      20
      NOTE: The pulse cycle changes depending on RPM at idle.

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Go to "DIAGNOSIS PROCEDURE ".

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