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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts and ensure safety.

2. Fluid Check and Replacement

• Tools Required: Torque wrench, fluid pump, catch pan.
• If the transmission fluid is low or dirty:
  1. Drain Fluid: Place a catch pan under the transmission pan. Remove the drain plug or pan bolts to drain the old fluid.
  2. Replace Fluid: Reinstall the drain plug or pan, then use a fluid pump to refill the transmission with new fluid according to manufacturer specifications (Toyota Type T-IV or WS fluid).
  3. Check Level: Start the engine, cycle through the gears, and check the fluid level with the dipstick.

3. Inspect and Repair Wiring

• Tools Required: Multimeter, wire strippers, soldering iron.
• 1. Inspect Wiring: Check all wiring and connectors for the TCM and transmission range sensor for damage.
• 1. Repair Damaged Wires: If any wires are frayed or broken, splice and solder them securely. Use heat shrink tubing for protection.

4. Replace Transmission Control Module (if necessary)

• Tools Required: Socket set, torque wrench.
• 1. Remove TCM: Locate the TCM, disconnect the electrical connectors, and remove it from its mounting bracket.
• 1. Install New TCM: Position the new TCM, secure it to the bracket, and reconnect all electrical connectors.
• 1. Torque Specifications: Tighten mounting bolts to manufacturer specifications.

5. Clear Codes and Test Drive

• Tools Required: OBD-II scanner.
• 1. Clear Codes: Use the scanner to clear the P0700 code and any other related codes.
• 1. Test Drive: Take the vehicle for a test drive to ensure proper operation and confirm that the check engine light does not reappear.