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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 >> Signal Circuit Inspection
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Signal Circuit Inspection

  1. Check for open in signal harness.
    1. Ignition "OFF".
    2. Disconnect PCM connector.
    3. Measure resistance between terminals 3 of sensor harness connector and 60 of the PCM harness connector.

      Specification: Approx. 0Ω

      Fig 1: Measuring Resistance Between Terminals 3 Of Sensor Harness Connector And 60 Of PCM Harness Connector
      G03842680Courtesy of HYUNDAI MOTOR CO.
    4. Is resistance within the specification?

      YES 

      • Go to next step as below

      NO 

  2. Check for short to ground in signal harness.
    1. Measure resistance between terminal 3 of sensor harness connector and chassis ground.

      Specification: Infinite

      Fig 2: Measuring Resistance Between Terminal 3 Of Sensor Harness Connector And Chassis Ground
      G03842681Courtesy of HYUNDAI MOTOR CO.
    2. Is resistance within the specification?

      YES 

      NO