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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Raise the vehicle safely using jack stands.

2. Address Fluid Issues

1. Check Fluid Level:
   • Remove the transmission dipstick and wipe it clean.
   • Reinsert and check fluid level; add ATF if low (refer to owner's manual for correct type).
2. Fluid Change (if dirty or burnt):
   • Drain the old transmission fluid using a drain pan.
   • Replace with new, manufacturer-recommended ATF.
   • Replace the transmission filter if applicable.

3. Repair or Replace TCM

1. Inspect TCM Wiring:
   • Look for damaged wires or loose connections; repair as necessary.
2. Test TCM:
   • Use a multimeter to check voltage and ground at TCM connectors.
3. Replace TCM (if faulty):
   • Disconnect the old TCM and install the new unit, ensuring all connections are tight.

4. Clear Codes and Test Drive

1. Erasing Codes:
   • Use the OBD-II scanner to clear any diagnostic trouble codes.
2. Test Drive:
   • Drive the vehicle under various conditions to ensure proper transmission operation.