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

Solution

1. Preparation

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

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  • Remove the transmission dipstick and check the fluid level; top off if necessary.
  • If the fluid is burnt or contaminated, drain the transmission fluid completely.
  • Replace the transmission filter if equipped.
  • Refill with the manufacturer-recommended transmission fluid (e.g., Toyota Type IV).
• Tools Required:
  • Transmission fluid pump
  • Socket set
  • Drain pan

3. Inspect Electrical Connections

• Sub-steps:
  • Visually inspect the wiring harness and connectors leading to the TCM.
  • Clean any corrosion or dirt from connectors using electrical contact cleaner.
  • Repair or replace any damaged wires or connectors as needed.
• Tools Required:
  • Electrical contact cleaner
  • Wire strippers and connectors

4. Replace Transmission Control Module (if necessary)

• Sub-steps:
  • Locate the TCM (usually near the transmission or under the dashboard).
  • Disconnect the electrical connectors from the TCM.
  • Remove the mounting bolts and take out the old TCM.
  • Install the new TCM and secure it with mounting bolts.
  • Reconnect the electrical connectors.
• Tools Required:
  • Socket set
  • Screwdriver set

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0700 code and any other related codes.