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Home >> Hyundai >> 2004 >> XG350 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> Trouble Shooting For DTC >> DTC P0103: Mass Or Volume Air Flow Circuit High Input >> Scantool Diagnostics >> Monitor Scantool Data
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Monitor Scantool Data

  1. Connect scantool to Data Link Connector (DLC).
  2. Warm up the engine to normal operating temperature.
  3. Monitor the "MAF VOLTAGE" parameter on scantool.
    1. Specification:
      MAFS OUTPUT VOLTAGE SPECIFICATIONS

      MAFS Output Voltage Idle rpm 0~2V
      3000 rpm 2~4V

      Voltage increases in response to racing

      Fig 1: Display Mass Air Flow Sensor Data At Idle
      G07374033
      Fig 2: Display Sensor Data At 2000 rpm
      G07374034
      Fig 3: Display Sensor Data At 3000 rpm
      G07374035
      Fig 4: Display Sensor Data At Open In Signal Circuit
      G07374036
  4. Is the measured sensor's signal within specifications?

    YES

    • Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO

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