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Home >> Infiniti >> 2012 >> M35h >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Component Testing >> Ignition Signal >> Component Function Check
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Component Function Check

  1. INSPECTION START
    1. Turn ignition switch OFF. '
    2. Perform "INSPECTION MODE 5". Refer to "DESCRIPTION ".
    3. Start engine.

      Does the engine start? 

      YES-1: With CONSULT: GO TO 2.

      YES-2: Without CONSULT: GO TO  3.

      No: Go to "DIAGNOSIS PROCEDURE ".

  2. CHECK IGNITION SIGNAL FUNCTION

    ◦ With CONSULT 

    1. Perform "POWER BALANCE" in "ACTIVE TEST" mode of "ENGINE" with CONSULT.
    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 

    1. Let engine idle.
    2. Read the voltage signal between ECM harness connector terminals under the following conditions with an oscilloscope.
      ECM Voltage signal
      + -
      Connector Terminal Connector Terminal
      F101 11 M107 128
      G08255749Courtesy of NISSAN NORTH AMERICA, INC.
      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 ".