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Home >> Hyundai >> 2007 >> Azera GLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0331 Knock Sensor 2 Circuit Range/Performance (Bank 2) >> Signal Circuit Inspection

Signal Circuit Inspection

  1. Check short to battery in harness
    1. IG "OFF" and disconnect knock sensor connector.
    2. IG "ON" and ENG "OFF"
    3. Measure voltage between terminal 1 of knock sensor harness connector and chassis ground
    4. Measure voltage between terminal 2 of knock sensor harness connector and chassis ground.

      Specification: Approx. 1.5V

    5. Is the measured voltage within specification?

      YES 

      • Go to " 2Check short to ground in harness" as follows.

      NO 

  2. Check short to ground in harness
    1. IG "OFF" and disconnect knock sensor connector and PCM connector.
    2. Measure resistance between terminal 1 of knock sensor harness connector and chassis ground.
    3. Measure resistance between terminal 2 of knock sensor harness connector and chassis ground.

      Specification: Infinite

    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 PCM. and then if the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      NO 

    NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. After testing PCM on the vehicle, use this function to reuse the PCM on the others
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