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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, transmission fluid, funnel, torque wrench, safety glasses, gloves.
• Ensure the vehicle is on a level surface and the engine is off before beginning work.

2. Check and Replace Transmission Fluid

1. Inspect Fluid Level:
   • Remove the transmission dipstick and wipe it clean.
   • Reinsert and remove the dipstick to check fluid level. Add fluid if low.
2. Replace Fluid if Contaminated:
   • Place a drain pan under the transmission pan.
   • Remove the transmission pan bolts using a socket set and carefully lower the pan.
   • Replace the old fluid with new, manufacturer-recommended transmission fluid.
   • Reinstall the transmission pan and torque bolts to manufacturer specifications (typically around 10-15 ft-lbs).

3. Inspect and Repair Wiring

1. Visual Inspection:
   • Check all wiring and connectors leading to the TCM.
   • Repair any frayed or damaged wires and ensure all connections are secure.
2. Testing:
   • Use a multimeter to check for continuity and proper grounding in the wiring harness.

4. Replace Transmission Control Module (if necessary)

1. Remove TCM:
   • Disconnect the battery and remove the TCM connector.
   • Remove the mounting bolts and gently pull the TCM from its bracket.
2. Install New TCM:
   • Position the new TCM in place and secure it with mounting bolts.
   • Reconnect the wiring harness and battery.

5. Clear Codes and Test Drive

1. Reset the System:
   • Use the OBD-II scanner to clear the P0700 code from the system.
2. Test Drive:
   • Drive the vehicle under various conditions to ensure the issue is resolved and monitor for any reoccurring codes.