how to fix P0700 code on my Toyota Corolla E140 (2006-2013)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the vehicle to cool down before working on the transmission.

2. Inspect and Replace Transmission Fluid

• Tools Required: Socket set, fluid pump, transmission fluid.
• Sub-steps:
  1. Raise the vehicle securely on jack stands.
  2. Locate the transmission fluid pan and remove the drain plug or pan bolts.
  3. Drain the old transmission fluid into a suitable container.
  4. Replace the transmission filter if applicable; remove the old filter and install the new one.
  5. Reinstall the drain plug or transmission pan and torque to manufacturer specifications.

3. Repair or Replace Wiring and Connectors

• Tools Required: Wire strippers, soldering iron, heat shrink tubing, electrical tape.
• Sub-steps:
  1. Inspect the wiring harness connected to the TCM for any damaged wires or loose connections.
  2. Repair any damaged wiring by cutting out the affected section, splicing in new wire, and securing with solder and heat shrink tubing.
  3. Reconnect any loose connectors and ensure they are secure.

4. Test the Transmission Control Module

• Tools Required: Multimeter, OBD-II scanner.
• Sub-steps:
  1. Reconnect the battery terminal.
  2. Use the multimeter to test the voltage at the TCM connector; refer to the service manual for specific voltage requirements.
  3. If the TCM is faulty, remove it by disconnecting the harness and unscrewing any mounting bolts.
  4. Install a new or refurbished TCM and reconnect the wiring harness.

5. Final Check

• Tools Required: OBD-II scanner.
• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Clear the P0700 code using the OBD-II scanner and take the vehicle for a test drive.
  3. Monitor the performance and check for any reoccurrence of the code.