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Home >> Hyundai >> 2004 >> XG350 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> MFI Control System >> Injector >> Injector Checking >> Using Stethoscope And Voltmeter
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Using Stethoscope And Voltmeter

  1. Using a stethoscope, check the injectors for a clicking sound at idle. Check that the sound is produced at shorter intervals as the engine speed increases.
    NOTE: Ensure that the sound from an adjacent injector is not being transmitted along the delivery pipe to an inoperative injector.
    Fig 1: Checking Injector Using Stethoscope
    G00721376Courtesy of HYUNDAI MOTOR CO.
  2. If a stethoscope is not available, check the injector operation with your finger. If no vibration is felt, check the wiring connector, injector or injection signal from the PCM.
    Fig 2: Checking Injector Using Finger
    G00721377Courtesy of HYUNDAI MOTOR CO.
  3. Disconnect the connector at the injector.
  4. Measure the resistance between terminals.

    Standard value: 13~16Ω (at 20°C (68°F))

  5. Re-connect the connector to the injector.
    Fig 3: Checking Injector Using Multi-Meter
    G00721378Courtesy of HYUNDAI MOTOR CO.
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