how to diagnose a P0700 code on Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Gather all necessary tools and components.
• Ensure the vehicle is parked on a level surface with the engine off.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick (if applicable) and remove it.
  2. Check the fluid level and condition (should be bright red and not burnt).
  3. If low, add the appropriate type of transmission fluid (refer to owner’s manual for specifications).
  4. If the fluid is dirty, drain and replace it. Use a fluid pump for easier removal.
  5. Replace the transmission pan gasket if it is leaking.

3. Inspect Wiring and Connections

• Sub-steps:
  1. Visually inspect the wiring harness connected to the TCM and transmission.
  2. Look for any signs of damage, such as fraying or corrosion.
  3. Clean any corroded connections with electrical contact cleaner.
  4. Reconnect any loose connectors securely.

4. Test the Transmission Control Module (TCM)

• Sub-steps:
  1. Locate the TCM, usually found near the transmission or under the dashboard.
  2. Use a multimeter to check voltage and continuity according to service manual specifications.
  3. If the TCM is faulty, replace it with a new unit and reprogram it if necessary.

5. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the battery terminal securely.
  2. Use the OBD-II scanner to clear the P0700 code and any other related codes.
  3. Start the vehicle and allow it to reach operating temperature.