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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to avoid any electrical shorts.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick and remove it.
  2. Check the fluid level; add new transmission fluid if low.
  3. If the fluid appears burnt or contaminated, drain the old fluid.
  4. Replace it with the manufacturer's recommended transmission fluid type (e.g., Toyota ATF WS).
  5. Recheck the fluid level after running the engine for a few minutes.

3. Repair or Replace Wiring and Connectors

• Sub-steps:
  1. Visually inspect the wiring harness and connectors leading to the TCM and transmission.
  2. Clean any corroded connectors with electrical contact cleaner.
  3. Repair any damaged wires using soldering and heat shrink tubing or replace the harness if necessary.

4. Test and Replace Transmission Control Module (if necessary)

• Sub-steps:
  1. Reconnect the battery and re-scan for codes.
  2. If the P0700 persists, remove the TCM.
  3. Replace with a new or known good TCM, ensuring to follow manufacturer specifications for installation.
  4. Reconnect all wiring and perform a reset of the system.

5. Clear Codes and Test Drive

• Sub-steps:
  1. Use the OBD-II scanner to clear the P0700 code and any other related codes.
  2. Test drive the vehicle under different conditions to ensure normal operation.
  3. Monitor for any reoccurring codes or symptoms.