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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a level surface and engage the parking brake.
• Disconnect the battery to prevent electrical short circuits.

2. Inspect Transmission Fluid

• Tools Required: Fluid pump, funnel, transmission fluid dipstick (if applicable).
• Remove the transmission dipstick (if equipped) and check fluid level.
• If low, add the manufacturer-recommended transmission fluid until the proper level is reached.
• Inspect fluid condition; if burnt or contaminated, proceed to the fluid change.

3. Replace Transmission Fluid and Filter (if needed)

• Tools Required: Socket set, fluid catch pan, new transmission filter (if applicable), new transmission fluid.
• Drain the old transmission fluid into a catch pan by removing the drain plug.
• Remove the transmission oil pan (if applicable) to access the filter.
• Replace the filter and clean the oil pan before reinstallation.
• Reinstall the oil pan with new gaskets if necessary, and tighten bolts to the manufacturer's torque specifications.
• Refill the transmission with new fluid through the dipstick tube.

4. Repair Wiring and Connectors

• Tools Required: Multimeter, wire strippers/crimpers, electrical tape.
• Inspect the wiring harness and connectors for damage.
• Repair or replace any damaged wires or connectors.
• Ensure all connections are secure and free of corrosion.

5. Reset TCM

• Tools Required: OBD-II scanner.
• Use the scanner to clear all stored codes, including the P0700 code.
• Reconnect the battery after all repairs.