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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 >> DTC P219A, P219B: Air Fuel Ratio >> DTC Logic >> DTC Confirmation Procedure

DTC Confirmation Procedure

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. 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 STEP 2  .

  2. PRECONDITIONING-2

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

    Will CONSULT be used?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP   6  .

  3. PERFORM DTC CONFIRMATION PROCEDURE-1

    1. Turn ignition switch ON.
    2. Select "COOLAN TEMP/S" in "DATA MONITOR" mode of "ENGINE" using CONSULT.
    3. Start engine.
    4. Make sure that "COOLAN TEMP/S" indicates more than 80°C (176°F).

    GO TO STEP 4  .

  4. PERFORM DTC CONFIRMATION PROCEDURE-2

    G-20With CONSULT 

    1. Select "SYSTEM 1 DIAGNOSIS B B1" and "SYSTEM 1 DIAGNOSIS A B1" in "DATA MONITOR" mode of "ENGINE" using CONSULT.
    2. Drive vehicle under the following conditions for at least 5 consecutive seconds.
      CAUTION:
      • Always drive vehicle at a safe speed.
      ENG SPEED 1, 000 - 1, 600 RPM
      COOLAN TEMP/S More than 80°C (176°F)
      B/FUEL SCHDL 5 - 12 msec
      Selector lever D position
      SYSTEM 1 DIAGNOSIS B B1 PRSENT
      NOTE:
      • Drive the vehicle at approximately 88 km/h (55MPH) allows easy diagnosis.
      • Keep the accelerator pedal as possible during crushing.
    3. Check "SYSTEM 1 DIAGNOSIS A B1" indication.

    Is "CMPLT" displayed?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP   2  .

  5. PERFORM DTC CONFIRMATION PROCEDURE-3

    Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES 

    Proceed to DIAGNOSIS PROCEDURE .

    NO 

    INSPECTION END

  6. PERFORM DTC CONFIRMATION PROCEDURE-4

    G-21Without CONSULT 

    1. Start the engine and warm it up to normal operating temperature.
    2. Drive vehicle under the following conditions for at least 5 consecutive seconds.
      CAUTION:
      • Always drive vehicle at a safe speed.
      Engine speed 1, 000 - 1, 600 RPM
      Calculated load value 27 - 63 %
      Selector lever D position
      NOTE:
      • Drive the vehicle at approximately 88 km/h (55MPH) allows easy diagnosis.
      • Keep the accelerator pedal as possible during crushing.
    3. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES 

    Proceed to DIAGNOSIS PROCEDURE .

    NO 

    INSPECTION END

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