Monitor Strategy Description
WARNING: This page is about a different car, the 2006 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.
With short circuit or open load of one of the leads of a magnetic crankshaft sensor, the input circuitry might still generate an output signal that keeps the software synchronized to the engine, but may trigger the misfire detection algorithm due to inaccuracy of the degraded signal.
The purpose of this diagnosis function is to detect such failures by monitoring the bias node voltage of the input circuitry.