how to fix P0700 code in Toyota Tacoma N300 (2016-Present) transmission?

Solution

1. Preparation

• Ensure the vehicle is on a level surface and engage the parking brake.
• Gather necessary tools and parts for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Tools Required: Socket set, torque wrench, transmission fluid pump, fluid catch pan.
• Remove the transmission pan bolts with a socket set, and carefully lower the pan.
• Inspect the old fluid for metal shavings or excessive debris. If contaminated, flush the transmission.
• Replace the transmission filter if applicable.
• Reinstall the transmission pan and torque bolts to manufacturer specifications (typically around 8-10 ft-lbs).
• Refill the transmission with the manufacturer-recommended fluid type (usually ATF WS for Toyota).

3. Inspect and Repair Electrical Connections

• Inspect TCM connectors for any signs of corrosion or damage.
• Tools Required: Multimeter, cleaning brush.
• Clean any corrosion off the connectors using a contact cleaner and a soft brush.
• If damaged, replace the connectors or repair the wiring as necessary.

4. Replace Faulty Components

• If diagnostic steps indicate a faulty TCM or sensors:
  • Tools Required: Socket set, torque wrench.
  • Remove the old component as per service manual instructions.
  • Install the new TCM or sensor, ensuring all connectors are secure.
  • Torque any mounting bolts to specifications.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the vehicle and allow it to reach operating temperature.
• Conduct a road test to ensure proper shifting and performance.