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Home >> Kia >> 2007 >> Sorento Base, A5SR2 >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures (1 Of 2) >> DTC P0325 Knock Sensor 1 Circuit >> Signal Circuit Inspection

Signal Circuit Inspection

  1. Check open in harness
    1. IG "OFF" and disconnect knock sensor connector and ECM connector.
    2. Measure resistance between terminal 1 of knock sensor harness connector and terminal 55 of ECM harness connector (C144-B).
    3. Measure resistance between terminal 2 of knock sensor harness connector and terminal 56 of ECM harness connector (C144-B).

      Specification: Below 1Ω

    4. Is the measured resistance within specification?

      YES 

      • If the problem is corrected after substituting with a known-good knock sensor, replace it. If the problem is pending, check for proper operating after substituting with a known-good ECM. and then if the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      NO 

      • Repair open in harness, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
        NOTE: There is a memory reset function on scan tool that can erase optional parts automatically detected and memorized by ECM. After testing ECM on the vehicle, use this function before reusing the ECM
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