Practice question

When diagnostic testing an AC-CDI system, how does the ignition key switch or handlebar kill switch actually shut down the engine?

  1. By grounding the CDI unit's dedicated 'kill' wire (often black/white) to the chassis frame, shorting out the capacitor charge.
  2. By breaking the 12V DC power supply line leading from the battery to the CDI unit.
  3. By mechanically lifting the spark plug wire off the spark plug tip.
  4. By closing the carburetor fuel valve electronically to starve the engine of fuel.

Answer: A — By grounding the CDI unit's dedicated 'kill' wire (often black/white) to the chassis frame, shorting out the capacitor charge.

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