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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, screwdriver set, transmission fluid, fluid catch pan, torque wrench.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Place a fluid catch pan under the transmission pan.
  2. Remove the transmission drain plug or pan bolts to drain old fluid.
  3. Inspect the old fluid for color and debris; if it is dark or contains metal shavings, further inspection of the transmission is required.
  4. Replace the drain plug and refill with new transmission fluid as per manufacturer specifications (typically Toyota Type T-IV).
  5. Torque the drain plug to the specified value (usually 30 ft-lbs).

3. Repair/Replace Transmission Control Module (if necessary)

• Sub-steps:
  1. Locate the TCM, usually found near the transmission or under the dashboard.
  2. Disconnect the wiring harness from the TCM.
  3. Remove the TCM mounting bolts and take out the module.
  4. Install the new or refurbished TCM, ensuring it is securely mounted.
  5. Reconnect the wiring harness.

4. Reconnect Battery and Clear Codes

• Reconnect the battery terminals and ensure they are tight.
• Use an OBD-II scanner to clear the P0700 code and any other related codes.