how to fix the P0700 code on my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is on a level surface, and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, funnel, socket set, fluid catch pan.
• Sub-steps:
  1. Position the fluid catch pan under the transmission pan.
  2. Remove the transmission drain plug (if equipped) or the pan itself to drain the old fluid.
  3. Inspect the old fluid for debris; if contaminated, proceed to replace the filter.
  4. Replace with the manufacturer-recommended transmission fluid type (e.g., Toyota ATF WS).
  5. Reinstall the drain plug or transmission pan, ensuring a proper seal.

3. Inspect and Repair Wiring/Connectors

• Tools Required: Wire stripper/crimper, multimeter.
• Sub-steps:
  1. Visually inspect the wiring harness connected to the TCM for frayed wires or corrosion.
  2. Use the multimeter to test for continuity and proper voltage at the connectors.
  3. Repair any damaged wiring or replace corroded connectors.

4. Check and Replace TCM (if necessary)

• Tools Required: Torque wrench, socket set, TCM replacement.
• Sub-steps:
  1. Remove any components obstructing access to the TCM.
  2. Disconnect the electrical connectors from the TCM.
  3. Unbolt the TCM and remove it from the vehicle.
  4. Install the new TCM, tightening bolts to the manufacturer’s specified torque.
  5. Reconnect the electrical connectors.

5. Reconnect Battery and Clear Codes

• Reconnect the battery terminals.
• Use the OBD-II scanner to clear the P0700 code and any related codes from the system.