2011 Infiniti QX56 AWDFACTORY OEM SERVICE PROCEDURE

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. Check 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 terminals under the following conditions with an oscilloscope.
      VOLTAGE SPECIFICATION

      ECM Voltage signal
      Cylinder + -
      Connector Terminal Connector Terminal
      1 F111 12 E80 175
      G07026377Courtesy of NISSAN MOTOR CO., U.S.A.
      2 13
      3 14
      4 15
      5 17
      6 18
      7 19
      8 20
      NOTE: The pulse cycle changes depending on RPM at idle.

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Go to "DIAGNOSIS PROCEDURE ".

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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