OBD System Description - Misfire Monitor

OBD System Description - Misfire Monitor

System Description / Monitoring Procedure

ECM (PCM) measures the angle speed of the crankshaft based on the pulse signal from the CKP sensor and CMP sensor for each cylinder. If it detects a large change in the angle speed of the crankshaft, it concludes occurrence of a misfire. When the number of misfire is counted by the ECM (PCM) beyond the DTC detecting condition, it determines the cylinder where the misfire occurred and outputs it as DTC.

DTC Description / Detecting Condition / Confirmation Procedure

P0300, P0301, P0302, P0303, P0304

Refer to P0300 DTC P0300 / P0301 / P0302 / P0303 / P0304: Random / Cylinder 1 / Cylinder 2 / Cylinder 3 / Cylinder 4 Misfire Detected.

Misfire Monitor

Operation





Enable condition





Typical malfunction thresholds