how to fix a 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 cool.
• Disconnect the battery to avoid electrical shorts.

2. Fluid Check and Replacement

• Check Fluid Level:
  • Locate the transmission dipstick (if applicable) and remove it.
  • Wipe it clean, reinsert, and pull it out again to check the fluid level.
• Replace Fluid:
  • If low or burnt, drain the transmission fluid using a fluid pump or drain pan.
  • Remove the transmission pan bolts and carefully lower the pan.
  • Replace the transmission filter (if applicable) and clean the pan.
  • Reinstall the pan with a new gasket and torque bolts to manufacturer specifications.
  • Refill transmission fluid through the dipstick tube with the recommended type of fluid.

3. Wiring and Connector Inspection

• Inspect the wiring harness leading to the TCM and transmission for signs of wear or damage.
• Clean any corroded connectors and ensure they are securely attached.

4. TCM Testing

• Use a multimeter to check the voltage supply to the TCM.
• If voltage is low or absent, trace the wiring back to the fuse box or power source to find the issue.
• If the TCM is faulty, replace it with a new unit.

5. Speed Sensor Inspection

• Locate the vehicle speed sensor (VSS) on the transmission.
• Disconnect the sensor and test it with a multimeter to ensure it is operational.
• If faulty, replace the sensor with a new one.