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Home >> Infiniti >> 2004 >> Q45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> Ignition Signal >> Diagnostic Procedure >> 3. Check Overall Function
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3. Check Overall Function

Without CONSULT-II 

  1. Let engine idle.
  2. Read the voltage signal between ECM terminals 18, 19, 20, 21, 29, 30, 31, 32 and ground with an oscilloscope.
    Fig 1: Checking voltage signal between ECM terminals 18, 19, 20, 21, 29, 30, 31, 32 & ground
    G00761346Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Verify that the oscilloscope screen shows the signal wave as shown below.
    NOTE: The pulse cycle changes depending on RPM at idle.
Fig 2: View Of CONSULT-II Screen in Oscilloscope Mode
G00761347Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

OK: INSPECTION END

NG: GO TO 11.