how to fix P0700 transmission code in Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a level surface and securely lifted if necessary.

2. Fluid Change

• Sub-steps:
  1. Remove the transmission drain plug using a socket set and drain the old fluid into a suitable container.
  2. Replace the drain plug and torque it to the manufacturer’s specifications.
  3. Refill the transmission with new fluid, using the recommended type (Honda ATF-Z1 or equivalent).
  4. Run the engine and shift through all gears to circulate the fluid, then check the fluid level and add more if necessary.

3. Inspect and Repair Wiring

• Sub-steps:
  1. Visually inspect the wiring harness and connectors for any signs of damage, frays, or corrosion.
  2. Clean connections with electrical contact cleaner and ensure they are securely connected.
  3. Repair or replace any damaged wiring or connectors as needed.

4. TCM Testing and Replacement

• Sub-steps:
  1. Using a multimeter, test the resistance and voltage of the TCM according to the specifications in the service manual.
  2. If the TCM is faulty, remove it by unscrewing the mounting bolts and disconnecting the wiring harness.
  3. Install the new TCM by reversing the removal steps and ensure all connections are secure.