how to fix P0700 code on my Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, torque wrench, transmission fluid, funnel.
• Disconnect the negative battery terminal to prevent electrical shorts and ensure safety.
• Raise the vehicle using jack stands if access to the transmission or undercarriage is needed.

2. Inspect and Replace Transmission Fluid

• Check the transmission fluid level using the dipstick.
• If fluid is low, add the correct type of transmission fluid per manufacturer specifications (typically ATF WS for Toyota).
• If the fluid is dark or has a burnt smell, drain the transmission fluid:
  1. Place a drain pan under the transmission pan.
  2. Remove the transmission pan bolts and carefully lower the pan.
  3. Drain the old fluid completely and inspect for metal shavings or debris.
  4. Replace the fluid with new ATF WS and reinstall the pan with a new gasket, torqueing bolts to manufacturer specifications (usually around 10-12 ft-lbs).

3. Repair or Replace TCM

• If diagnostics indicate a faulty TCM:
  1. Locate the TCM (commonly found near the transmission or under the dashboard).
  2. Disconnect the wiring harness from the TCM.
  3. Remove the mounting bolts and carefully take out the TCM.
  4. Install the new TCM by reversing the removal steps.
  5. Reconnect the wiring harness.

4. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0700 code and any related codes.
• Test drive the vehicle to ensure the issue has been resolved and monitor for any reoccurrence of the check engine light.