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EC-296 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] P0327, P0328 KS P0327, P0328 KS DTC Description INFOID:0000000011278017 DTC DETECTION LOGIC POSSIBLE CAUSE • Harness or connectors (Knock sensor circuit is open or shorted.) • Knock sensor FAIL-SAFE Not applicable DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test. 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 10 V 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 >> Proceed to . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000011278018 1. CHECK KNOCK SENSOR GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect knock sensor harness connector. 3. Disconnect ECM harness connector. 4. Check the continuity between knock sensor harness connector and ECM harness connector. 5. Also check harness for short to power. YES >> GO TO 2. DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition P0327 KNOCK SEN/CIRC-B1 An excessively low voltage from the knock sensor is sent to ECM. P0328 KNOCK SEN/CIRC-B1 An excessively high voltage from the knock sensor is sent to ECM. + − Continuity Knock sensor ECM Connector Terminal Connector Terminal F9 2 F51 8 Existed |