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Home >> Infiniti >> 2017 >> QX80 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 4) >> DTC/Circuit Diagnosis >> DTC P0130, P0150: A/F Sensor 1 >> 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 procedure 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.

    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 FOR MALFUNCTION A

    1. Start engine and warm it up to normal operating temperature.
    2. Let engine idle for 2 minutes.
    3. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES 

    Go to DIAGNOSIS PROCEDURE .

    NO-1 

    With CONSULT: GO TO STEP 3  .

    NO-2 

    With GST: GO TO STEP  7.

  3. CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION

    G-20 WITH CONSULT

    1. Start engine and warm it up to normal operating temperature.
    2. Select "A/F SEN1 (B1)" or "A/F SEN1 (B2)" in "DATA MONITOR" mode with CONSULT.
    3. Check "A/F SEN1 (B1)" or "A/F SEN1 (B2)" indication.

    Does the indication fluctuate around 2.2 V?

    YES 

    GO TO STEP 4  .

    NO 

    Go to DIAGNOSIS PROCEDURE .

  4. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-I

    1. Select "A/F SEN1 (B1) P1276" (for DTC P0130) or "A/F SEN1 (B2) P1286" (for DTC P0150) of "A/F SEN1" in "DTC WORK SUPPORT" mode with CONSULT.
    2. Touch "START".
    3. When the following conditions are met, "TESTING" will be displayed on the CONSULT screen.
      ENG SPEED 1, 000 - 3, 200 rpm
      VHCL SPEED SE More than 64 km/h (40 mph)
      B/FUEL SCHDL 1.0 - 8.0 msec
      Selector lever D position

      If "TESTING" is not displayed after 20 seconds, retry from step 2. 

      CAUTION:

      Always drive vehicle at a safe speed.

    Is "TESTING" displayed on CONSULT screen?

    YES 

    GO TO STEP 5  .

    NO 

    Check A/F sensor 1 function again. GO TO STEP 3  .

  5. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-II

    Release accelerator pedal fully.

    NOTE:

    Never apply brake when releasing the accelerator pedal.

    Which does "TESTING" change to?

    COMPLETED 

    GO TO STEP 6  .

    OUT OF CONDITION 

    Retry DTC CONFIRMATION PROCEDURE. GO TO STEP 4  .

  6. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-III

    Touch "SELF-DIAG RESULT".

    Which is displayed on CONSULT screen?

    YES 

    INSPECTION END

    NO 

    Go to DIAGNOSIS PROCEDURE .

  7. PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

    NSM020 WITH GST

    Perform component function check. Refer to COMPONENT FUNCTION CHECK .

    NOTE:

    Use component function check to check the overall function of the A/F sensor 1 circuit. During this check, a 1st trip DTC might not be confirmed.

    Is the inspection result normal?

    YES 

    INSPECTION END

    NO 

    Go to DIAGNOSIS PROCEDURE .

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