how to reset the battery management system on Tesla Model S Plaid/Refresh (2021-present)

Solution

1. Preparation

• Gather necessary tools: A socket set, torque wrench, and gloves.
• Ensure the vehicle is parked on a flat surface with sufficient space to work.

2. Disconnect the 12V Battery

1. Open the front trunk (frunk) and locate the 12V battery.
2. Using a socket wrench, loosen the negative (-) terminal clamp and remove it from the battery.
3. Repeat the process for the positive (+) terminal, ensuring that the terminals do not touch each other.

3. Wait and Reconnect

1. Allow the vehicle to sit without power for at least 10 minutes.
2. Reconnect the positive (+) terminal first, ensuring a snug fit.
3. Follow with the negative (-) terminal, ensuring it is securely tightened.

4. Perform a Soft Reset

1. With the vehicle in Park, press and hold both scroll wheels on the steering wheel.
2. Hold until the central display turns black and the Tesla logo appears, indicating a reset.

5. Check Battery Management System

1. Once the system has rebooted, check for any warning messages on the display.
2. Monitor the battery performance by accessing the battery settings via the touchscreen.