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Home >> Suzuki >> 2001 >> Vitara JS, 4D Utility, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0327: Knock Sensor Circuit, Low Input, Or DTC P0328: Knock Sensor Circuit, High Input >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. Perform DTC CONFIRMATION TEST . If DTCs P0327 or P0328 is set, go to next step. If DTCs P0327 and P0328 are not set, problem is intermittent. System is okay at this time. See TROUBLE SHOOTING - NO CODES article.
  2. Start engine. Backprobing, measure voltage between ground and PCM 26-pin connector C51-3 terminal No. 3 (Black wire). If reading is not .90-3.98 volts, go to next step. If reading is .90-3.98 volts, problem is intermittent. System is okay at this time. See TROUBLE SHOOTING - NO CODES article. If intermittent problem is not found, replace PCM and go to DTC CONFIRMATION TEST .
  3. Turn ignition off. Disconnect KS connector. Turn ignition on. Measure voltage between ground and KS harness connector Black wire terminal. If reading is 4-5 volts, replace KS and go to DTC CONFIRMATION TEST . If reading is not 4-5 volts, check for open or short to ground in Black wire between KS and PCM 26-pin connector C51-3 terminal No. 3. See WIRING DIAGRAMS article. If wire is okay, check for poor terminal contact at PCM 26-pin connector C51-3. If poor terminal contact is found, repair as necessary and go to DTC CONFIRMATION TEST . If terminal contact is okay, replace PCM and go to DTC CONFIRMATION TEST .
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