how to fix P0700 code in Toyota Highlander Fourth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the battery before working on electrical components.

2. Check Transmission Fluid

• Tools Required: Transmission dipstick, funnel, fluid container.
• Remove the transmission dipstick and check the fluid level; add fluid if necessary.
• Inspect the fluid for a burnt smell or dark color; if the fluid is contaminated, proceed to replace it.

3. Inspect Wiring and Connectors

• Tools Required: Multimeter, socket set.
• Visually inspect the wiring harness and connectors for any signs of wear or damage.
• Use a multimeter to test the continuity of the wires leading to the TCM; repair or replace any damaged wiring.

4. Replace Transmission Fluid

• Tools Required: Socket set, fluid pump, transmission fluid.
• Drain the old transmission fluid from the transmission pan by removing the drain plug.
• Replace the transmission filter if applicable.
• Reinstall the drain plug and refill the transmission with the recommended type and amount of fluid.

5. Replace TCM (if necessary)

• Tools Required: Socket set, torque wrench.
• Remove the TCM from its mounting location following the manufacturer's specifications.
• Install the new TCM and connect all wiring harnesses securely.
• Torque the TCM bolts to the specified settings in the service manual.