1. Ensure that the vehicle's ignition is off and all accessories are turned off.
2. Locate the driver's side door courtesy light switch. It's usually found near the bottom of the door, close to the kick panel.
3. Turn the courtesy light switch on and off five times in quick succession. You should do this within a few seconds.
4. After the fifth time, leave the courtesy light switch in the "off" position.
5. Wait for about 10 seconds.
6. Turn the ignition key to the "On" position, but don't start the engine.
7. Wait for the anti-theft system indicator light on the instrument panel to turn off. This may take a few seconds.
8. Start the engine.
This process should reset the anti-theft system and allow you to start the vehicle normally.