how to fix P0700 transmission code in my Toyota Corolla E140 (2006-2013)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and engage the parking brake.
• Disconnect the battery to prevent any electrical issues.

2. Check and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, socket set, fluid catch pan.
• Remove the transmission drain plug using a socket set to drain old fluid.
• Inspect the fluid for metal shavings or burnt odor.
• Replace with new transmission fluid as specified in the owner's manual (e.g., Toyota ATF WS).
• Reinstall the drain plug and torque to manufacturer specifications.

3. Inspect and Repair Wiring/Connectors

• Remove any necessary panels to access the TCM wiring harness.
• Inspect for frayed wires, corrosion, or loose connections.
• Use a multimeter to check for continuity in the wiring.
• Repair or replace damaged wires and connectors as needed.

4. Replace Transmission Range Sensor (if faulty)

• Tools Required: Socket set, torque wrench.
• Locate the transmission range sensor on the transmission.
• Disconnect the electrical connector.
• Remove mounting bolts and carefully remove the sensor.
• Install the new sensor and secure it with bolts, torquing to manufacturer specifications.
• Reconnect the electrical connector.

5. Reinstall and Test the TCM

• If the TCM is faulty, replace it with a new unit.
• Tools Required: Socket set.
• Remove the old TCM by unscrewing it from its mounting location.
• Install the new TCM, ensuring all connectors are securely attached.

6. Final Checks

• Reconnect the battery.
• Start the vehicle and allow it to reach operating temperature.
• Clear any diagnostic trouble codes using the OBD-II scanner and perform a test drive to confirm proper operation.