how to resolve P0700 transmission error code in Toyota Corolla E210 (2019-2024)

Solution

1. Preparation

• Gather tools and parts. Ensure the vehicle is parked on a level surface and the engine is off.
• Tools Required: OBD-II scanner, socket set, multimeter, torque wrench, transmission fluid.

2. Check and Replace Transmission Fluid

1. Locate the Transmission Dipstick:
   • Open the hood and find the transmission dipstick.
2. Check Fluid Level:
   • Remove the dipstick, wipe it clean, reinsert, and pull it out again to check fluid level.
   • Fluid should be within the marked range.
3. Replace Fluid if Necessary:
   • If low, add the manufacturer-recommended transmission fluid.
   • If fluid is dark or has a burnt smell, perform a fluid change.
   • Fluid Change:
     • Remove the transmission drain plug (if equipped) and drain old fluid into a container.
     • Replace the filter if applicable, then reinstall the drain plug.
     • Fill the transmission with new fluid using the dipstick tube.

3. Inspect Wiring and Connectors

1. Visual Inspection:
   • Inspect the wiring harness connected to the TCM and transmission for frays or damage.
2. Test Connectivity:
   • Use a multimeter to check for continuity and proper voltage at the TCM connectors.
   • Repair or replace any damaged wires or connectors.

4. Test and Replace TCM if Necessary

1. Check TCM Functionality:
   • If wiring is intact, use a scanner to check TCM functionality.
2. Replacement Procedure:
   • Disconnect the battery before removing the TCM.
   • Remove the TCM from its mounting location.
   • Install the new TCM, ensuring all connections are secure.
   • Reconnect the battery.