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Home >> Nissan-Datsun >> 2003 >> Frontier Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0327: Knock Sensor Circuit Low Input Or DTC P0328: Knock Sensor Circuit High Input >> Diagnostic Procedure (2.4L)
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Diagnostic Procedure (2.4L)

  1. Turn ignition off. Loosen and retighten engine ground bolts. See Figure .
  2. Disconnect ECM harness connector. See Figure or Figure . Measure resistance between ground and ECM harness connector terminal No. 64 (White wire). See Figure . Resistance should be about 500-620 k/ohms at 77°F (25°C). If resistance is as specified, go to step  4 . If resistance is not as specified, go to next step.
  3. Disconnect knock sensor harness connector (connector F2). See Figure . Check continuity of White wire between knock sensor harness connector terminal No. 1 and ECM harness connector terminal No. 64. Also, check circuit for short to ground and short to voltage. If problem is found, repair as necessary. If problem is not found, go to next step.
    4. CAUTION: Do not use any knock sensor that has been dropped or physically damaged.
  4. Measure resistance between ground and knock sensor terminal No. 1. Resistance should be 500-620 k/ohms at 77°F (25°C). If resistance is as specified, go to next step. If resistance is not as specified, replace knock sensor.
  5. No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
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