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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (3 Of 3)) >> DTC/Circuit Diagnosis >> Ignition Signal >> Component Function Check >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. INSPECTION START

    Turn ignition switch OFF, and restart engine.

    Does the engine start?

    YES-1 

    With CONSULT: GO TO STEP 2  .

    YES-2 

    Without CONSULT: GO TO STEP 3  .

    NO 

    Proceed to DIAGNOSIS PROCEDURE .

  2. CHECK IGNITION SIGNAL FUNCTION

    G-20With CONSULT 

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

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Proceed to DIAGNOSIS PROCEDURE .

  3. CHECK IGNITION SIGNAL FUNCTION

    G-21 Without CONSULT

    1. Let engine idle.
    2. Read the voltage signal between ECM harness connector terminals with an oscilloscope.
      ECM Voltage signal
      + -
      Connector Terminal Connector Terminal
      F79 103 E32 152
      G08435929Courtesy of NISSAN NORTH AMERICA, INC.
      104
      106
      107
      113
      114
      NOTE:

      The pulse cycle changes depending on RPM at idle.

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Proceed to DIAGNOSIS PROCEDURE .

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