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Home >> Hyundai >> 2006 >> Elantra Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System (G4GC-GSL 2.0) >> DTC Troubleshooting Procedures >> DTC P0325 Knock Sensor 1 Circuit >> Signal Circuit Inspection

Signal Circuit Inspection

  1. Check for open in signal harness.
    1. Measure resistance between terminals 1 of sensor harness connector and 10 of the PCM harness connector.

      Specification: Approx. 0Ω

      Fig 1: Measuring Resistance Between Terminals 1 Of Sensor Connector And 10 Of PCM Connector
      G04923988Courtesy of HYUNDAI MOTOR CO.
    2. 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 1 of sensor harness connector and chassis ground.

      Specification: Infinite

      Fig 2: Measuring Resistance Between Terminal 1 Of Sensor Connector And Chassis Ground
      G04923989Courtesy of HYUNDAI MOTOR CO.
    2. Is resistance within the specification?

      Yes: 

      • Go to next step as below.

      No: 

  3. Check for short to power in signal harness
    1. Ignition "ON" & Engine "OFF".
    2. Measure voltage between terminals 1 of sensor harness connector and chassis ground.

      Specification: Approx. 0V

      Fig 3: Measuring Voltage Between Terminals 1 Of Sensor Connector And Chassis Ground
      G04923990Courtesy of HYUNDAI MOTOR CO.
    3. Is voltage within the specification?

      Yes: 

      No: