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 avoid electrical shorts.
• Allow the vehicle to cool down if it has been running.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission fluid dipstick. Remove it and check the fluid level.
  2. If fluid is low or dirty, drain the old fluid by removing the drain plug.
  3. Replace it with new, manufacturer-recommended transmission fluid (e.g., Toyota ATF WS).
  4. Replace the drain plug and fill the transmission with the correct amount of new fluid.
• Tools Required: Socket set, funnel, transmission fluid
• Safety Warnings: Ensure the vehicle is on a level surface and use jack stands if lifting the vehicle.

3. Inspect and Repair Wiring and Connectors

• Sub-steps:
  1. Locate the TCM and inspect all associated wiring and connectors.
  2. Repair or replace any damaged wires or corroded connectors.
  3. Ensure all connections are secure.
• Tools Required: Wire stripper/crimper, electrical tape, multimeter

4. Replace Transmission Control Module (if necessary)

• Sub-steps:
  1. Disconnect the wiring harness from the TCM.
  2. Remove the TCM from its mounting location (usually secured with bolts).
  3. Install the new TCM by securing it in place and reconnecting the wiring harness.
• Tools Required: Socket set
• Safety Warnings: Ensure the vehicle's battery is disconnected before working on the TCM.

5. Clear Codes and Test Drive

• Sub-steps:
  1. Reconnect the negative battery terminal and start the vehicle.
  2. Use the OBD-II scanner to clear the P0700 code and any other related codes.
  3. Take the vehicle for a test drive to ensure proper operation of the transmission.
• Tools Required: OBD-II scanner