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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety.

Tools Required:

• OBD-II scanner
• Multimeter
• Socket set
• Torque wrench
• Fluid catch pan

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick or fill plug.
  2. Remove the dipstick or fill plug and check fluid level.
  3. If fluid is low, add the recommended transmission fluid (Toyota Type T-IV or equivalent).
  4. If fluid is dark or has a burnt smell, drain the old fluid into a catch pan and replace with new fluid.

3. Inspect and Repair Wiring/Connectors

• Sub-steps:
  1. Visually inspect the wiring harness and connectors leading to the TCM.
  2. Repair any frayed wires or loose connections.
  3. Clean any corroded connectors with electrical contact cleaner.

4. Test and Replace TCM (if necessary)

• Sub-steps:
  1. Use a multimeter to check the voltage and ground signals at the TCM.
  2. If readings are outside the manufacturer's specifications, the TCM may need to be replaced.
  3. Disconnect the old TCM and install the new unit by reversing the removal process.
  4. Reconnect the battery and ensure no loose connections.

5. Clear Codes and Test Drive

• Sub-steps:
  1. Use the OBD-II scanner to clear the P0700 code and any additional codes.
  2. Perform a test drive to check for proper transmission operation and ensure no codes reappear.