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

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

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface.
• Disconnect the battery to prevent electrical shorts.
• Gather necessary tools and parts.

2. Inspect and Clean Connectors

• Tools Required: Electrical contact cleaner, brush, multimeter
• Sub-steps:
  1. Locate the transmission control module and its connectors.
  2. Clean the connectors with electrical contact cleaner to remove any corrosion or dirt.
  3. Inspect the connectors for any physical damage and repair or replace as necessary.

3. Check Transmission Fluid

• Tools Required: Fluid dipstick or level gauge (if applicable)
• Sub-steps:
  1. Remove the transmission fluid dipstick (if equipped).
  2. Check the fluid level; it should be within the designated range.
  3. Inspect the fluid condition; it should be clear and free of debris or burnt smell. Replace if contaminated.

4. Test Transmission Control Module

• Tools Required: Multimeter
• Sub-steps:
  1. Access the transmission control module.
  2. Use a multimeter to measure voltage at the module's power and ground pins.
  3. Compare readings to manufacturer specifications; repair wiring if not within specifications.

5. Update Software

• Tools Required: Tesla service tool or access to Tesla service portal
• Sub-steps:
  1. Connect the vehicle to the Tesla service network.
  2. Check for available software updates for the vehicle's systems.
  3. Apply any necessary updates and restart the vehicle.