how to fix P0700 transmission code in my Toyota RAV4 XA50 (2019-2024)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick or fill plug and remove it.
  2. Check fluid level—add fluid if low. Use Toyota WS transmission fluid.
  3. If the fluid is discolored or smells burnt, proceed to drain and refill.
  4. To drain, locate the transmission pan drain plug, place a drain pan underneath, and remove the plug.
  5. Allow fluid to drain completely; replace the plug and torque to manufacturer specifications (usually around 8.7 ft-lbs).
  6. Refill with new transmission fluid through the dipstick or fill plug until the proper level is reached.

3. Inspect and Repair Wiring and Connectors

• Sub-steps:
  1. Visually inspect the wiring harness leading to the TCM and transmission for frays or broken wires.
  2. Clean any corroded connectors with electrical contact cleaner.
  3. Repair or replace damaged wiring as necessary.

4. Test and Replace Transmission Range Switch (if needed)

• Sub-steps:
  1. Locate the transmission range switch on the transmission assembly.
  2. Disconnect the electrical connector and check for continuity with a multimeter.
  3. If faulty, remove the old switch (usually requires a socket set) and install the new one.
  4. Reconnect the electrical connector and ensure proper alignment.

5. Check and Replace Transmission Filter (if needed)

• Sub-steps:
  1. Drain the transmission fluid again if necessary.
  2. Remove the transmission pan by unscrewing the bolts (use a socket set).
  3. Take out the old filter and replace it with a new one.
  4. Clean the transmission pan and replace the gasket before reattaching the pan.