what causes the P0700 code on my Toyota Corolla E140 (2006-2013)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Check Transmission Fluid

• Sub-steps:
  • Remove the transmission dipstick.
  • Wipe it clean, reinsert, and pull it out again to check fluid level.
  • If low, add the recommended transmission fluid (typically ATF WS for Toyota).
  • If the fluid is dirty or smells burnt, proceed to fluid change.

3. Inspect and Replace TCM (if needed)

• Sub-steps:
  • Locate the TCM (usually near the transmission or under the dashboard).
  • Unplug the wiring harness from the TCM.
  • Remove the bolts securing the TCM using a socket set.
  • Replace with a new TCM if testing indicates failure.
  • Reconnect the wiring harness and secure the TCM in place.

4. Repair Wiring/Connections

• Sub-steps:
  • Inspect all wiring and connectors for breaks or corrosion.
  • Repair or replace damaged wiring as necessary.
  • Ensure all connectors are clean and securely attached.

5. Refill Transmission Fluid (if changed)

• Sub-steps:
  • Raise the vehicle using a jack and secure with jack stands.
  • Remove the transmission pan if changing fluid.
  • Replace the filter and clean the pan, then reattach.
  • Pour in the correct amount of new transmission fluid through the dipstick tube.