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Home >> Infiniti >> 2008 >> EX35 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS U1000 To P0153 >> 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 turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

    TESTING CONDITION: 

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

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
    1. Start engine and warm it up to normal operating temperature.
    2. Let it idle for 2 minutes.
    3. Check 1st trip DTC.

    Is 1st trip DTC detected? 

    YES: Go to "DIAGNOSIS PROCEDURE ".

    NO-1: With CONSULT-III: GO TO 3.

    NO-2: Without CONSULT-III: GO TO  7.

  3. CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION
    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-III.
    3. Check "A/F SEN1 (B1)" or "A/F SEN1 (B2)" indication.

    Does the indication fluctuates around 2.2 V? 

    YES: GO TO 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-III.
    2. Touch "START".
    3. When the following conditions are met, "TESTING" will be displayed on the CONSULT-III screen.
      ENG SPEED SPECIFICATIONS

      ENG SPEED 1, 100 - 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-III screen? 

    YES: GO TO 5.

    NO: Check A/F sensor 1 function again. GO TO 3.

  5. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-II

    Release accelerator pedal fully.

    NOTE: Never apply brake during releasing the accelerator pedal.

    Which does "TESTING" change to? 

    COMPLETED: GO TO 6.

    OUT OF CONDITION: Retry DTC CONFIRMATION PROCEDURE. GO TO  4.

  6. PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-III

    Touch "SELF-DIAG RESULT".

    Which is displayed on CONSULT-III screen? 

    YES: INSPECTION END

    NO: Go to "DIAGNOSIS PROCEDURE ".

  7. PERFORM COMPONENT FUNCTION CHECK FOR MALFUNCTION B

    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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