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

Solution

1. Preparation

• Gather tools and parts.
• Ensure the vehicle is on a level surface and securely raised on jack stands.
• Disconnect the negative battery cable to prevent electrical shock.

2. Inspect and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, funnel, socket set.
• Check the transmission fluid level; if low, add the manufacturer-recommended fluid. If fluid is dirty or burnt, proceed to replace it:
  • Remove the transmission fluid pan (if applicable) and drain the old fluid.
  • Clean the pan and replace the filter if equipped.
  • Reinstall the pan with a new gasket, torquing the bolts to the manufacturer's specifications.
  • Refill with the appropriate transmission fluid until it reaches the proper level.

3. Repair or Replace Wiring/Connectors

• Tools Required: Multimeter, wire crimping tool, electrical tape.
• Inspect wiring and connectors for damage; repair any frayed wires or corroded connectors.
• Ensure all connections are secure and properly insulated.

4. Test Transmission Control Module

• Tools Required: Multimeter.
• Measure voltage and ground signals to the TCM based on the service manual specifications.
• If the TCM fails testing, replace the module:
  • Disconnect the battery again.
  • Remove the TCM from its mounting location.
  • Install the new TCM and reconnect all wiring.
  • Reconnect the battery.

5. Clear Codes and Test Drive

• Tools Required: OBD-II scanner.
• After repairs, use an OBD-II scanner to clear the error codes.
• Test drive the vehicle to ensure proper operation of the transmission.