how to troubleshoot P0700 code on Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, torque wrench.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Remove the transmission fluid drain plug using a socket set.
  2. Allow old fluid to drain into a suitable container.
  3. Replace the drain plug and torque to manufacturer specifications (consult repair manual).
  4. Refill the transmission with the recommended fluid type (Toyota ATF WS) using a funnel.
  5. Start the engine and cycle through all gear positions, then check fluid level again.

3. Check and Repair Wiring/Connectors

• Sub-steps:
  1. Visually inspect the wiring harness connected to the TCM for any signs of wear, fraying, or corrosion.
  2. Disconnect the TCM connector and inspect the terminals for damage or corrosion.
  3. Clean any corrosion using an electrical contact cleaner.
  4. Repair or replace damaged wiring as necessary, ensuring good electrical connections.

4. Test and Replace TCM (if necessary)

• Sub-steps:
  1. Use a multimeter to check the TCM power and ground circuits as per the service manual specifications.
  2. If the TCM shows no power or ground issues, it may need replacement.
  3. Remove the TCM by unscrewing it from its mounting location, disconnecting the electrical connectors.
  4. Install the new TCM by reversing the removal steps, ensuring proper connections.
  5. Torque the mounting screws to specifications.