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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the vehicle to cool down if it has been running.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Raise the vehicle and secure it on jack stands.
  2. Remove the transmission fluid dipstick and check the fluid level.
  3. If fluid is low or discolored, drain the old fluid using a fluid pump or drain plug.
  4. Replace it with the manufacturer's recommended transmission fluid (typically ATF WS for Toyota).
  5. Refill the transmission through the dipstick tube, ensuring the proper fluid level is attained.

3. Inspect and Repair Wiring

• Sub-steps:
  1. Locate the wiring harness connected to the TCM.
  2. Visually inspect for any frayed wires, corrosion, or poor connections.
  3. Repair or replace damaged wires and connectors using appropriate soldering techniques or heat shrink tubing.

4. Test and Replace the Transmission Control Module

• Sub-steps:
  1. Use a multimeter to check the TCM power and ground connections.
  2. If the TCM fails the test, remove it by unscrewing the mounting bolts and disconnecting the wiring harness.
  3. Install a new TCM, ensuring it is securely fastened and the connections are tight.

5. Replace the Transmission Range Sensor

• Sub-steps:
  1. Locate the transmission range sensor on the transmission.
  2. Disconnect the electrical connector and remove the sensor by unscrewing it from the transmission.
  3. Install the new sensor in the same position, ensuring it aligns correctly.
  4. Reconnect the electrical connector.