Tesla Model S Owners & Service Manuals

Tesla Model S: Park Brake Caliper - Release - Harness Tool - Through ECU

Tesla Model S (2012-2025) Service Manual / Brakes / Park Brake Caliper - Release - Harness Tool - Through ECU

Special Tools Required:

  • 1030924-00-A EPB RELEASE TOOL, HARNESS

    Park Brake Caliper - Release - Harness Tool - Through ECU

  • 1030925-00-A ASY, RELEASE TOOL, EPB CONTROLLER REWORK

    Park Brake Caliper - Release - Harness Tool - Through ECU

  1. Chock the front wheels.
  2. Remove the RH rear trunk trim (refer to procedure).
  3. Disconnect the harness from the top port of the electric parking brake controller inside the vehicle. Connect this harness to the gray male connector on the harness tool.

    Park Brake Caliper - Release - Harness Tool - Through ECU

  4. Connect the gray female connector on the harness tool to the outboard port on the reworked EPB controller.

    Note: The center port on the reworked electric parking brake controller is not used in this method.

    Park Brake Caliper - Release - Harness Tool - Through ECU

Caution: Ensure that the external 12V power supply is turned off before continuing this procedure. The clamps on the harness tool are not insulated.
  1. Connect the positive and negative clamps on the harness tool to the corresponding terminals on the external 12V power supply. Ensure that the positive and negative clamps do not touch each other.
  2. Turn on the 12V power supply.
Caution: After the next step, the vehicle will be free-rolling. Ensure that the wheel chocks are secure.
  1. Hold down the button on the harness tool that is labeled "RELEASE" until the sound of the caliper motor is no longer audible. This usually takes approximately 4 seconds. Note: If the calipers do not release, turn off the 12V power supply, then turn it back on. Repeat step 7.
  2. Turn off the 12V power supply.
  3. Remove the positive and negative clamps from the 12V power supply.
  4. Disconnect the harness tool from the electric parking brake controller inside the vehicle.

Caution: Do not reconnect the vehicle's harness to the electric parking brake controller inside the vehicle until the vehicle has arrived at its destination. Reconnecting the harness might cause the electric parking brake to re-engage.

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