how to troubleshoot the parking brake not releasing in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Tools Required: Tesla diagnostic tool, socket set, multimeter, flathead screwdriver.
• Ensure the vehicle is parked on a level surface and the ignition is off.
• Disconnect the 12V battery for safety before working on the electrical components.

2. Inspect the Parking Brake Actuator

• Sub-steps:
  1. Remove the rear wheel to access the parking brake assembly.
  2. Inspect the parking brake actuator for any signs of wear or damage.
  3. Check the connections to the actuator for corrosion or loose wiring.
  4. Use a multimeter to test the actuator's resistance to ensure it is functioning properly.

3. Check the Brake Control Software

• Sub-steps:
  1. Reconnect the 12V battery.
  2. Power on the vehicle and access the service menu.
  3. Check for any software updates related to the parking brake system.
  4. If updates are available, follow the on-screen prompts to perform the update.
  5. Reset the parking brake system through the software menu if needed.

4. Verify the Brake Pedal Switch

• Sub-steps:
  1. Locate the brake pedal switch under the dashboard.
  2. Disconnect the switch connector and test it with a multimeter to check for continuity when the pedal is pressed.
  3. If the switch is faulty, replace it with a new component.
  4. Reconnect the switch and ensure it is properly mounted.