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Home >> Infiniti >> 2011 >> M37 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 To P0456 >> DTC P0456: EVAP Control System >> DTC Logic >> DTC Confirmation Procedure
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DTC Confirmation Procedure

  1. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.

    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.

      Do you have CONSULT-III? 

      YES: GO TO 2.

      NO: GO TO  4.

  2. PERFORM DTC CONFIRMATION PROCEDURE-I

    With CONSULT-III 

    1. Turn ignition switch ON and select "EVAP DIAG READY" in "DATA MONITOR" mode with CONSULT-III.
    2. Start engine and wait at idle until "OFF" of "EVAP DIAG READY" changes to "ON".
      NOTE: It will take at most 2 hours until "OFF" of "EVAP DIAG READY" changes to "ON".
    3. Turn ignition switch OFF and wait at least 90 minutes.
      NOTE: Never turn ignition switch ON during 90 minutes.
    4. Turn ignition switch ON and select "EVAP LEAK DIAG" in "DATA MONITOR" mode with CONSULT-III.
    5. Check that "EVAP LEAK DIAG" indication.

      Which is displayed on CONSULT-III? 

      CMPLT: GO TO 3.

      YET: Perform DTC CONFIRMATION PROCEDURE again. GO TO  1.

  3. PERFORM COMPONENT FUNCTION CHECK-II

    Check 1st trip DTC.

    Is 1st trip DTC detected? 

    YES: Go to "DIAGNOSIS PROCEDURE ".

    NO: INSPECTION END

  4. PERFORM DTC CONFIRMATION PROCEDURE

    With GST 

    1. Start engine and wait engine idle for at least 2 hours.
    2. Turn ignition switch OFF and wait at least 90 minutes.
      NOTE: Never turn ignition switch ON during 90 minutes.
    3. Turn ignition switch ON.
    4. Check 1st trip DTC.

      Is 1st trip DTC detected? 

      YES: Go to "DIAGNOSIS PROCEDURE ".

      NO: INSPECTION END