how to fix P0700 code in my Toyota Corolla E210 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Remove the transmission fluid drain plug using a socket set and drain old fluid into a suitable container.
  2. Replace the drain plug with a new washer, and torque it to the manufacturer's specifications (typically around 20 Nm).
  3. Refill the transmission with new fluid (check the owner's manual for the correct type, typically Toyota ATF WS).
• Tools Required: Socket set, drain pan, funnel.

3. Repair or Replace Wiring and Connectors

• Sub-steps:
  1. Inspect wiring and connectors for damage; repair or replace any corroded or broken wires.
  2. Ensure all connectors are securely fastened to the TCM.
• Tools Required: Wire strippers, crimping tool, electrical tape.

4. Check and Replace TCM (if necessary)

• Sub-steps:
  1. If diagnostics indicate the TCM is faulty, remove it by unscrewing the mounting bolts.
  2. Disconnect the electrical connectors.
  3. Install the new TCM by reversing the removal steps, ensuring all connections are secure.
  4. Reconnect the negative battery terminal.
• Tools Required: Socket set, screwdriver.