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

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Tools Required: Socket set, funnel, oil catch pan, new transmission fluid (refer to owner's manual for specifications).
• Check the transmission fluid level using the dipstick; if low, add fluid. If fluid is dirty or burnt, replace it:
  1. Remove the transmission fluid drain plug using a socket.
  2. Allow the old fluid to drain completely into an oil catch pan.
  3. Replace the drain plug and tighten it to the manufacturer’s torque specification.
  4. Refill with new transmission fluid through the dipstick tube using a funnel.

3. Inspect Wiring and Connectors

• Tools Required: Wire brush, electrical contact cleaner.
• Visually inspect the wiring harness and connectors leading to the TCM and transmission:
  1. Clean any corrosion on connectors using electrical contact cleaner.
  2. Repair or replace any damaged wires or connectors.

4. Test and Replace Transmission Control Module (if necessary)

• Tools Required: Multimeter, socket set.
• If the TCM is found faulty:
  1. Disconnect the TCM from its harness.
  2. Remove mounting bolts using a socket set.
  3. Install the new TCM by reversing the removal steps.
  4. Reconnect all wiring harnesses securely.

5. Check and Replace Transmission Solenoids (if necessary)

• Tools Required: Socket set, torque wrench.
• If solenoids are faulty:
  1. Remove the transmission pan by unscrewing the mounting bolts.
  2. Carefully lower the pan and remove the old filter.
  3. Remove the faulty solenoids as per manufacturer guidelines.
  4. Install the new solenoids and replace the filter.
  5. Reinstall the transmission pan and torque bolts to the specified setting.