What is the function of the stator pickup coil (pulser coil) in a solid-state ignition system?

1. It detects a metal projection (timing rotor) on the spinning flywheel to determine piston position and sends a low-voltage pulse to trigger the CDI spark.
2. It generates the high-voltage electricity needed to charge the CDI capacitor directly.
3. It regulates the AC charging voltage coming from the alternator coils.
4. It acts as a sensor that detects when the engine oil level is low.