how to diagnose P0700 code on my Tesla Model S Plaid/Refresh (2021-present)

Learn how to diagnose and fix P0700 transmission control malfunction in Tesla Model S Plaid/Refresh. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the battery is disconnected for safety.

2. Check and Refill Transmission Fluid

• Sub-steps:
  1. Locate the transmission fluid reservoir.
  2. Remove the cap and use a dipstick to check the fluid level.
  3. If low, add the recommended transmission fluid type until the correct level is reached.
• Tools Required: Transmission fluid, funnel, dipstick.

3. Repair or Replace Wiring/Connectors

• Sub-steps:
  1. Identify any damaged wires or connectors during the visual inspection.
  2. Repair any damaged sections or replace connectors as necessary.
  3. Ensure all connections are secure and insulated.
• Tools Required: Wire strippers, electrical tape, connectors.

4. Update Software

• Sub-steps:
  1. Connect the vehicle to a Wi-Fi network.
  2. Navigate to the software update section in the vehicle’s settings.
  3. Follow the prompts to download and install any available updates.
• Tools Required: None.

5. Replace Transmission Control Module (if necessary)

• Sub-steps:
  1. Remove any components obstructing access to the TCM.
  2. Disconnect the TCM wiring harness.
  3. Remove the TCM using appropriate tools, noting any mounting bolts.
  4. Install the new TCM by reversing the removal steps, ensuring all connections are secure.
• Tools Required: Socket set, torque wrench.