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Home >> Infiniti >> 2021 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (1 Of 5) >> Engine (ECM) >> DTC P0022: Intake Valve Timing Control >> Confirmation Procedure
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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 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE-I 

    SYMBOL 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 deg.C (140 deg.F)

      Selector lever

      P or N position

    4. Let engine idle for 25 seconds.
    5. Check 1st trip DTC.

    SYMBOL WITH GST

    Follow the procedure "With CONSULT" above.

    Is 1st trip DTC detected?

    YES

    Refer to DTC Diagnosis Procedure .

    NO

    GO TO 3.

  3. PERFORM DTC CONFIRMATION PROCEDURE-II 

    SYMBOL 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 deg.C (147 deg.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.

    SYMBOL WITH GST

    Follow the procedure "With CONSULT" above.

    Is 1st trip DTC detected?

    YES

    Refer to DTC Diagnosis Procedure .

    NO

    INSPECTION END