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Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 4) >> DTC/Circuit Diagnosis >> DTC P0016: Intake Valve Timing Control >> DTC Logic >> DTC Confirmation Procedure
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DTC Confirmation Procedure

  1. PRECONDITIONING

    1. Turn ignition switch OFF and wait at least 10 seconds.
    2. Turn ignition switch ON.
    3. Turn ignition switch OFF and wait at least 10 seconds.

    TESTING CONDITION: 

    Before performing the following procedure, confirm that battery voltage is 11 V or more at idle. 

    GO TO STEP 2  .

  2. PERFORM DTC CONFIRMATION PROCEDURE-I

    G-20 WITH CONSULT

    1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT.
    2. Start engine and warm it up to the normal operating temperature.
    3. Maintain the following conditions for at least 6 consecutive seconds.

      Hold the accelerator pedal as steady as possible.

      ENG SPEED 1, 200 - 2, 000 rpm (A constant rotation is maintained.)
      COOLAN TEMP/S More than 60°C (140°F)
      Selector lever P or N position
    4. Let engine idle for 25 seconds.
    5. Check 1st trip DTC.

    NSM020 WITH GST

    Follow the procedure "With CONSULT" above.

    Is 1st trip DTC detected?

    YES 

    Go to DIAGNOSIS PROCEDURE 

    NO 

    GO TO STEP 3  .

  3. PERFORM DTC CONFIRMATION PROCEDURE-II

    G-20 WITH CONSULT

    1. Select "DATA MONITOR" mode with CONSULT.
    2. Maintain the following conditions for at least 20 consecutive seconds.
      ENG SPEED 1, 200 - 3, 175 rpm (A constant rotation is maintained.)
      COOLAN TEMP/S More than 64°C (147°F)
      Selector lever 1st or 2nd position
      Driving location uphill Driving vehicle uphill
      (Increased engine load will help maintain the driving conditions required for this test.)
      CAUTION:

      Always drive at a safe speed.

    3. Check 1st trip DTC.

    NSM020 WITH GST

    Follow the procedure "With CONSULT" above.

    Is 1st trip DTC detected?

    YES 

    Go to DIAGNOSIS PROCEDURE .

    NO 

    INSPECTION END