how do I diagnose P0700 code in my Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative terminal of the battery to prevent electrical shock.
• Ensure the vehicle is on a level surface and securely supported.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Remove the transmission fluid dipstick and check fluid level.
  2. If low, add the appropriate type of transmission fluid (Toyota ATF WS).
  3. If fluid is dark or has a burnt smell, proceed to drain and replace the fluid.
• Tools Required: Torque wrench, funnel, fluid pump.
• Safety Warnings: Allow the vehicle to cool before working on the transmission.

3. Inspect and Repair Wiring/Connectors

• Sub-steps:
  1. Remove any protective covers to access the TCM and related wiring.
  2. Inspect all connectors for corrosion, damage, or loose connections.
  3. Repair or replace any damaged wiring or connectors as needed.
• Tools Required: Wire cutters, soldering iron, electrical tape.

4. Replace Transmission Control Module (if necessary)

• Sub-steps:
  1. Disconnect the battery and remove the TCM from its mounting location.
  2. Disconnect the wiring harness from the TCM.
  3. Install the new TCM and reconnect the wiring harness.
  4. Re-install the TCM in its original position.
• Tools Required: Socket set, screwdrivers.