1. Accessory: The first position (usually a slight turn) activates the accessories. This will power up things like the radio, power windows, and interior lights. The engine will not crank.
2. Run: Turning the key further past the accessory position will engage the "run" position. This activates the fuel pump, electronic control modules (ECMs), and other systems necessary to start the engine. You'll likely see the check engine light and other warning lights illuminate, then extinguish if there are no immediate problems. The engine will *not* yet crank.
3. Start: Turning the key fully to the last position will engage the starter motor. This cranks the engine, attempting to start it. Once the engine starts, the key can be released (it will return to the "run" position). If the engine doesn't start, the key should be returned to the "off" position to prevent draining the battery.
If something isn't happening in this sequence: There's a problem. It could be a simple issue like a dead battery, a faulty ignition switch, a problem with the starter motor, or something more complex related to the car's electrical system or fuel system. You'll need further diagnostics to determine the cause.
