how to fix P0700 code on Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather necessary tools and safety equipment.
• Disconnect the vehicle battery to prevent electrical shorts.
• Raise the vehicle using a jack and secure it with jack stands.

2. Transmission Fluid Check and Replacement

• Sub-steps:
  1. Locate the transmission dipstick and remove it.
  2. Check the fluid level; if low, top up with the recommended Toyota ATF (Automatic Transmission Fluid).
  3. If the fluid is dirty or burnt, proceed to drain and replace it.
  4. To drain, remove the transmission pan bolts using a socket set and carefully lower the pan.
  5. Clean the pan and replace the filter if necessary.
  6. Reinstall the pan with a new gasket, tightening bolts to the manufacturer’s torque specifications (typically around 7-9 ft-lbs).
  7. Refill with new transmission fluid through the dipstick tube, ensuring the correct fluid type and level.

3. TCM Inspection and Repair

• Sub-steps:
  1. Locate the TCM, usually found near the transmission or under the dashboard.
  2. Disconnect the wiring harness from the TCM.
  3. Inspect the connector pins for corrosion or damage; clean or replace as necessary.
  4. If the TCM is faulty, replace it with a new unit, ensuring compatibility with the vehicle.
  5. Reconnect the wiring harness securely.

4. Final Checks

• Sub-steps:
  1. Reconnect the vehicle battery.
  2. Start the engine and allow it to reach operating temperature.
  3. Shift through all gears to ensure smooth operation.
  4. Use the OBD-II scanner to clear the P0700 code and any other stored codes.
  5. Take the vehicle for a test drive to confirm the repair.