how to fix P0700 code in Toyota Corolla E170 (2013-2019)

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, fluid catch pan, funnel, socket set, torque wrench.
• Safety Warnings: Disconnect the battery before working on electrical systems. Allow the engine to cool before inspecting the transmission.

2. Address Transmission Fluid Issues

• Check Fluid Level:
  • Place the vehicle on a level surface.
  • Remove the dipstick and wipe it clean.
  • Reinsert, then remove again to check fluid level.
• Replace Fluid if Necessary:
  • If low, add the recommended ATF type for Toyota (typically Toyota ATF WS).
  • If burnt or contaminated, perform a fluid change.
  • To drain, remove the transmission drain plug and allow fluid to fully drain into the catch pan.
  • Replace the drain plug and refill through the dipstick tube, ensuring the correct amount of fluid is added.

3. Repair Wiring and Connectors

• Inspect and Repair:
  • Locate the wiring harness connected to the TCM.
  • Check for frayed wires or loose connectors.
  • Repair any damaged wiring using electrical tape or replace connectors as necessary.

4. Replace Transmission Control Module (if necessary)

• Remove Old TCM:
  • Disconnect the battery.
  • Locate the TCM, usually found near the transmission or under the dashboard.
  • Remove the screws or bolts securing the TCM and disconnect the wiring harness.
• Install New TCM:
  • Position the new TCM in place and connect the wiring harness.
  • Secure it with screws or bolts.
  • Reconnect the battery.

5. Clear Codes and Test Drive

• Clear Codes: Use the OBD-II scanner to erase any stored codes.
• Test Drive: Drive the vehicle to ensure proper shifting and that the check engine light does not reappear.