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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Tools required: OBD-II scanner, multimeter, socket set, torque wrench.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick and remove it to check fluid level.
  2. If low, add the appropriate type of transmission fluid (consult owner’s manual for specifications).
  3. If fluid is burnt or contaminated, drain the old fluid using a drain pan.
  4. Replace with new transmission fluid, ensuring to fill to the recommended level.

3. Inspect and Repair Wiring/Connectors

• Sub-steps:
  1. Visually inspect the wiring harness connected to the TCM for signs of wear or damage.
  2. Disconnect the connectors and clean them with electrical contact cleaner.
  3. Repair or replace any damaged wires or connectors as necessary.

4. Test and Replace TCM (if necessary)

• Sub-steps:
  1. Using a multimeter, check the voltage and ground at the TCM connector while the ignition is on.
  2. If voltage and ground are present but codes persist, consider replacing the TCM.
  3. Remove the old TCM by unscrewing the mounting bolts and disconnecting the harness.
  4. Install the new TCM, reconnect the harness, and secure it with the mounting bolts.