DTC    P0300    Random / Multiple Cylinder Misfire Detected

DESCRIPTION

WIRING DIAGRAM

CONFIRMATION DRIVING PATTERN

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P0300, P0301, P0302 OR P0303)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE EGR VALVE)

CHECK WHETHER DTC OUTPUT RECURS

READ VALUE USING INTELLIGENT TESTER (MISFIRE RPM AND MISFIRE LOAD)

CHECK PCV HOSE (HOSE CONNECTIONS)

READ VALUE USING INTELLIGENT TESTER

INSPECT SPARK PLUG

CHECK FOR SPARKS AND IGNITION

CHECK CYLINDER COMPRESSION PRESSURE

CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, AND/OR #30 VOLTAGE)

CHECK FUEL INJECTOR ASSEMBLY OF MISFIRING CYLINDER

CHECK VALVE CLEARANCE OF MISFIRING CYLINDER

CHECK AIR INDUCTION SYSTEM

CHECK VALVE TIMING

CHECK FUEL PRESSURE

READ VALUE USING INTELLIGENT TESTER (COOLANT TEMP)

INSPECT MANIFOLD ABSOLUTE PRESSURE SENSOR

CHECK AIR INDUCTION SYSTEM

CHECK VALVE TIMING

CHECK FUEL PRESSURE

READ VALUE USING INTELLIGENT TESTER (COOLANT TEMP)

INSPECT MANIFOLD ABSOLUTE PRESSURE SENSOR

INSPECT SPARK PLUG

CHECK FOR SPARK AND IGNITION

CHECK CYLINDER COMPRESSION PRESSURE OF MISFIRING CYLINDER

CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)

INSPECT ECM TERMINAL OF MISFIRING CYLINDER (#10, #20, AND/OR #30 VOLTAGE)

CHECK FUEL INJECTOR ASSEMBLY OF MISFIRING CYLINDER

CHECK VALVE CLEARANCE OF MISFIRING CYLINDER

CHANGE TO NORMAL SPARK PLUG AND CHECK SPARK OF MISFIRING CYLINDER

CHANGE TO NORMAL IGNITION COIL AND CHECK SPARK OF MISFIRING CYLINDER