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

Solution

1. Preparation

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

2. Inspect and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, socket set, drain pan.
• Sub-steps:
  1. Remove the transmission drain plug using a socket wrench and allow the fluid to drain completely into a drain pan.
  2. Replace the drain plug and torque it to the manufacturer’s specifications (typically around 25-30 Nm).
  3. Use a transmission fluid pump to fill the transmission with the recommended fluid type until it reaches the proper level (check the owner's manual for fluid specifications).

3. Inspect Wiring and Connectors

• Tools Required: Multimeter, visual inspection tools.
• Sub-steps:
  1. Remove the TCM connector by pressing the release tab and pulling it straight out.
  2. Inspect the connector pins for corrosion and damage.
  3. Use a multimeter to check for continuity in the wiring harness from the TCM to the transmission.
  4. Repair or replace any damaged wiring or connectors as necessary.

4. Update TCM Software

• Tools Required: OBD-II scanner with programming capability, laptop.
• Sub-steps:
  1. Connect the OBD-II scanner to the vehicle’s diagnostic port.
  2. Follow the manufacturer's instructions to check for any available software updates for the TCM.
  3. If updates are available, perform the update according to the manufacturer's specifications.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal securely.
• Start the vehicle and check for any error codes using the OBD-II scanner.
• Drive the vehicle to verify that the transmission operates correctly and that the check engine light does not reappear.