how to diagnose P0700 transmission code on Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to prevent electrical shorts during the repair.
• Ensure the vehicle is on a level surface and securely lifted if needed.

2. Inspect and Replace Transmission Fluid

• Remove the transmission dipstick and check the fluid level and condition.
• If fluid is low or dirty, drain the old transmission fluid using a fluid extractor.
• Replace the transmission filter if applicable.
• Refill with the manufacturer's recommended transmission fluid type (typically Toyota ATF WS).

3. Repair or Replace Wiring and Connectors

• Inspect all wiring and connectors for wear or corrosion.
• If damaged, repair the wiring using appropriate gauge wire and connectors.
• Ensure all connections are clean and secure.

4. Check and Replace TCM

• If the TCM is faulty, remove it by unscrewing the mounting bolts.
• Disconnect the electrical connectors from the TCM.
• Install the new TCM by reversing the removal steps and ensuring all connections are secure.
• Torque the mounting bolts to manufacturer specifications.

5. Clear Codes and Test Drive

• Reconnect the battery and clear any stored trouble codes using an OBD-II scanner.
• Conduct a test drive to verify that the transmission operates correctly and that the check engine light remains off.