how to fix a P0700 code on my Toyota Corolla E170 (2013-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on the electrical components.
• Allow the vehicle to cool down if it has been running.

2. Check and Replace Transmission Fluid

• Required Tools: Transmission fluid pump, funnel, torque wrench.
• Sub-steps:
  1. Locate the transmission dipstick and remove it to check fluid level.
  2. If fluid is low or dirty, drain the transmission fluid from the pan using a wrench.
  3. Replace the transmission filter if applicable.
  4. Refill with the manufacturer-recommended transmission fluid (check your owner’s manual for specifications).
  5. Start the engine and allow it to reach operating temperature, then check fluid level again and top off if needed.

3. Inspect and Repair Wiring/Connectors

• Required Tools: Multimeter, electrical connector cleaner.
• Sub-steps:
  1. Locate the TCM and visually inspect the wiring harness for any damage.
  2. Use a multimeter to test the continuity of the wires leading to the TCM.
  3. Clean any corroded connectors with electrical connector cleaner and ensure they are securely connected.
  4. Repair any damaged wiring using appropriate electrical tape or heat-shrink tubing.

4. Reprogram or Replace TCM

• Required Tools: OBD-II scanner with reprogramming capabilities.
• Sub-steps:
  1. If issues persist after fluid and wiring checks, consider reprogramming the TCM using the OBD-II scanner.
  2. Follow the manufacturer's instructions to reprogram the TCM.
  3. If reprogramming fails, replace the TCM with a new or remanufactured unit.
  4. Ensure the new TCM is properly calibrated according to the vehicle specifications.