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P0327, P0328 KS EC-781 < COMPONENT DIAGNOSIS > [QR25DE EXCEPT FOR CALIFORNIA] C D E F G H I J K L M A EC N P O P0327, P0328 KS Description INFOID:0000000004349745 The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the ECM. DTC Logic INFOID:0000000004349746 DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test. TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 10V at idle. >> GO TO 2. 2. PERFORM DTC CONFIRMATION PROCEDURE 1. Start engine and run it for at least 5 seconds at idle speed. 2. Check 1st trip DTC. YES >> Go to NO >> INSPECTION END Diagnosis Procedure INFOID:0000000004349747 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E9. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. CHECK KNOCK SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Disconnect knock sensor harness connector and disconnect ECM harness connector. 2. Check the continuity between knock sensor harness connector and ECM harness connector. 3. Also check harness for short to ground and short to power. YES >> GO TO 3. NO >> Repair open circuit or short to ground or short to power in harness or connectors. DTC No. Trouble diagnosis name DTC detected condition Possible cause P0327 Knock sensor circuit An excessively low voltage from the sensor is • Harness or connectors (The sensor circuit is open or shorted.) • Knock sensor P0328 Knock sensor circuit An excessively high voltage from the sensor is Knock sensor ECM Continuity Connector Terminal Connector Terminal F45 2 F13 67 Existed |