how to diagnose P0700 code in my Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the vehicle’s battery to prevent electrical shorts.
• Ensure the vehicle is on a level surface and secure with jack stands.

2. Check Transmission Fluid

• Remove the transmission dipstick and wipe it clean.
• Reinsert the dipstick and remove it again to check fluid level; top off if necessary with the correct ATF (Automatic Transmission Fluid).
• Inspect fluid for color and odor; replace fluid if it’s dark brown or smells burnt.

3. Inspect Wiring and Connectors

• Locate the TCM and visually inspect the harness and connectors for wear or damage.
• Disconnect the TCM and clean the contacts with electrical contact cleaner.
• Reconnect the TCM ensuring a secure connection.

4. Test the TCM

• Using a multimeter, check the voltage at the TCM power and ground pins according to the service manual specifications.
• If voltage is out of range, trace the wiring back to the battery and ground points for faults.

5. Clear Codes and Test Drive

• Reconnect the battery and use the OBD-II scanner to clear the P0700 code.
• Perform a test drive to see if the code returns and monitor transmission behavior.