To take an electronic parking brake (EPB) out of maintenance mode without a scan tool, you can try the following manual procedure:

1. Start by ensuring that the engine is running, as most EPB systems require the engine to be running for maintenance mode to be deactivated.

2. Locate the EPB switch or button. It is typically located on the center console, near the gearshift lever, or on the dashboard.

3. Press and hold the EPB switch or button. The length of time required to hold it may vary depending on the vehicle, so try holding it for at least 10 seconds and observe if there are any changes.

4. While still holding the EPB switch or button, engage the foot brake pedal. This step helps to ensure the EPB system recognizes that the vehicle is in a safe condition for the parking brake to be released.

5. Release the EPB switch or button and the foot brake pedal simultaneously. Keep in mind that some vehicles may require a particular sequence of pedal release, so consult your owner's manual to be sure.

6. Observe the EPB indicator light on the dashboard. If it turns off, it indicates that the EPB is out of maintenance mode and functioning normally.

While attempting this procedure should work for most vehicles, it is important to note that EPB systems can vary across manufacturers and models. Therefore, referring to your vehicle's specific owner's manual is always recommended for accurate information on how to take the EPB out of maintenance mode without a scan tool.