how to diagnose P0700 code in my Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Gather Tools and Parts: Ensure you have all tools and parts needed for the repair.
• Disconnect Battery: Disconnect the negative terminal of the battery to avoid any electrical shorts.

2. Fluid Replacement

• Drain Transmission Fluid:
  • Locate the transmission drain plug and remove it using a socket set. Allow the fluid to drain completely.
• Replace Filter:
  • Remove the transmission pan by unscrewing the bolts and gently prying it off.
  • Replace the transmission filter with a new one.
• Install New Fluid:
  • Reattach the transmission pan and torque bolts to manufacturer's specifications (typically around 8-10 ft-lbs).
  • Refill the transmission with the appropriate type of fluid (Honda ATF-Z1 or equivalent).

3. Inspect and Repair Wiring

• Check Wiring Connections:
  • Inspect the wiring harness for any frays or loose connections, particularly at the TCM and transmission.
  • Repair or replace any damaged wiring as necessary.

4. Replace TCM (if needed)

• Remove TCM:
  • Locate the TCM (usually under the dashboard or near the transmission).
  • Disconnect the wiring harness and unbolt the TCM from its mount.
• Install New TCM:
  • Position the new TCM and secure it with bolts.
  • Reconnect the wiring harness.

5. Reconnect Battery and Test

• Reconnect Battery: Reattach the negative terminal of the battery.
• Test Drive:
  • Take the vehicle for a test drive to ensure proper operation of the transmission and check if the P0700 code returns.