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Home >> Infiniti >> 2024 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (4 Of 4) >> Engine (ECM) >> DTC P219E: Air Fuel Ratio >> Confirmation Procedure

Confirmation Procedure

  1. PRECONDITIONING-1 

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

    >>

    GO TO 2.

  2. PRECONDITIONING-2 
    1. Turn ignition switch ON.
    2. Clear the mixture ratio self-learning value. Refer to Work Procedure .

    Will CONSULT be used?

    YES>>

    GO TO 3.

    NO>>

    GO TO 6.

  3. PERFORM DTC CONFIRMATION PROCEDURE-1 

    SYMBOL With CONSULT

    1. Turn ignition switch ON.
    2. On CONSULT screen, select "ENGINE" >> "DATA MONITOR" >> "COOLAN TEMP/S".
    3. Start engine.
    4. Check that "COOLAN TEMP/S" indicates more than 65°C (149°F).

    >>

    GO TO 4.

  4. PERFORM DTC CONFIRMATION PROCEDURE-2 

    SYMBOL With CONSULT

    1. On CONSULT screen, select the following items in "DATA MONITOR".
      • ENG SPEED
      • COOLAN TEMP/S
      • B/FUEL SCHDL
      • A/F IMBALNC DIAG-CPS STAT
      • A/F IMBLNC DIAG-CPS CMPLT
    2. Drive vehicle under the following conditions for at least 20 consecutive seconds.
      CAUTION:
      • Always drive vehicle at a safe speed.
      • This procedure must be performed by two or more persons.
      ENG SPEED 1, 000-1, 400 RPM
      COOLAN TEMP/S More than 65°C (149°F)
      B/FUEL SCHDL 3-6 msec
      Selector lever D position (A/T)
      A/F IMBALNC DIAG-CPS STAT PRSNT
      NOTE:
      • Keep the accelerator pedal as possible during cruising.
      • Drive the vehicle at approximately 88 km/h (55 MPH) allows easy diagnosis.
    3. Check "A/F IMBLNC DIAG-CPS CMPLT" indication.

    Is "CMPLT" displayed?

    YES>>

    GO TO 5.

    NO>>

    GO TO 2.

  5. PERFORM DTC CONFIRMATION PROCEDURE-3 

    Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES>>

    Refer to DTC Diagnosis Procedure .

    NO>>

    INSPECTION END

  6. PERFORM DTC CONFIRMATION PROCEDURE-4 

    SYMBOL With GST

    1. Start the engine and warm it up to normal operating temperature.
    2. Drive vehicle under the following conditions for at least 20 consecutive seconds.
      CAUTION:
      • Always drive vehicle at a safe speed.
      Engine speed 1, 000-1, 400 RPM
      Calculated load value 13-30%
      Selector lever D position (A/T)
      NOTE:
      • Keep the accelerator pedal as possible during cruising.
      • Drive the vehicle at approximately 88 km/h (55 MPH) allows easy diagnosis.
    3. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES>>

    Refer to DTC Diagnosis Procedure .

    NO>>

    INSPECTION END