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Home >> Hyundai >> 2005 >> Elantra GLS, 4D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> DTC Troubleshooting Procedures >> DTC P0102: Mass Or Volume Air Flow Circuit Low Input >> Power Supply Circuit Inspection

Power Supply Circuit Inspection

  1. Ignition "OFF".
  2. Disconnect MAF sensor connector.
  3. Ignition "ON" & Engine "OFF"
  4. Measure voltage between terminal 2 of the sensor harness connector and chassis ground.

    Specification : Approx. B+

    Fig 1: Measuring Voltage Between Terminal 2 Of Sensor Harness Connector And Chassis Ground
    G03842679Courtesy of HYUNDAI MOTOR CO.
  5. Is voltage within the specification?

    YES 

    NO 

    • Check for an open or short to ground in the power supply circuit between the MAF sensor and main relay. Repair as necessary and go to VERIFICATION OF VEHICLE REPAIR  procedure.
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