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Home >> Infiniti >> 2005 >> QX56 RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P0101: MAF Sensor >> Diagnostic Trouble Codes Confirmation Procedure >> With CONSULT-II
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With CONSULT-II

  1. Turn ignition switch ON.
  2. Select "DATA MONITOR" mode with CONSULT-II.
  3. Start engine and warm it up to normal operating temperature.
  4. Run engine for at least 10 seconds at idle speed.
  5. If 1st trip DTC is detected, go to "DIAGNOSTIC PROCEDURE "
    Fig 1: CONSULT-II Display - "DATA MONITOR" Mode
    G02388639Courtesy of NISSAN MOTOR CO., U.S.A.


  1. Turn ignition switch ON.
  2. Start engine and warm it up to normal operating temperature.

    If engine cannot be started, go to  "DIAGNOSTIC PROCEDURE ".

  3. Select "DATA MONITOR" mode with CONSULT-II.
  4. Check the voltage of "MAS A/F SE-B1" with "DATA MONITOR".
  5. Increases engine speed to about 4,000 RPM.
  6. Monitor the linear voltage rise in response to engine speed increases.

    If NG, go to "DIAGNOSTIC PROCEDURE ".

    If OK, go to following step.

    Fig 1: DTC P0101 MAF Sensor Graph - With CONSULT-II
    G02388640Courtesy of NISSAN MOTOR CO., U.S.A.
  7. Maintain the following conditions for at least 10 consecutive seconds.
    CONDITIONS CHART

    ENG SPEED More than 2,000 RPM
    THRTL SEN 1 More than 3V
    THRTL SEN 2 More than 3V
    Selector lever Suitable position
    Driving location Driving vehicle uphill (Increased engine load) will help maintain the driving conditions required for this test.
  8. If 1st trip DTC is detected, go to "DIAGNOSTIC PROCEDURE "
    Fig 2: CONSULT-II Display - "DATA MONITOR" Mode
    G02388641Courtesy of NISSAN MOTOR CO., U.S.A.