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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE> 13A-859 Wave Pattern Observation Points advanced when the engine speed is increased. . Examples of Abnormal Wave Patterns Example 1 (Wave pattern during engine cranking) • Cause of problem Open-circuit in ignition primary circuit • Wave pattern characteristics Voltage value is too low. CONDITION OF WAVE PROBABLE CAUSE Voltage value is too low Open-circuit in ignition primary AK704330AB 0 5 OFF ON (ms) Ignition period Dwell section Crankshaft position Power transistor (Volt) TDC 0 5 2 engine revolutions (1 camshaft revolution) Standard wave pattern AK604478 AB Normal wave |