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Home >> Infiniti >> 2017 >> Q50 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 263 (Engine Control System (Introduction) (2.0L) (Except Hybrid)) >> System Description >> System >> Smooth Running Control >> System Description >> Misfire Detecting Function

Misfire Detecting Function

WARNING: This page is about a different car, the 2018 Infiniti Q50. However, it is still accessible from the selected car via links, so may be relevant.

For the smooth running control, ECM monitors a crankshaft position sensor signal to check that the signal synchronizes exactly with the combustion timing of each cylinder. For the crankshaft position sensor signal, distinctive acceleration must be generated at the combustion process of each cylinder. Regarding misfire, each signal has different acceleration. This allows ECM to detect an misfire. If the number of occurrences of misfire exceeds the specified value, ECM deactivates the fuel indicator. Up to two fuel indicators can be deactivated simultaneously.

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