how to fix P0700 transmission code on Toyota Corolla E140 (2006-2013)

Solution

1. Preparation

• Gather necessary tools and parts before starting.
• Disconnect the battery to avoid electrical shorts.
• Ensure the vehicle is on a level surface and secure with wheel chocks.

2. Inspect Transmission Fluid

• Remove the transmission dipstick.
• Check the fluid level; add fluid if low.
• Inspect fluid for burnt smell or dark coloration. If fluid is contaminated, a fluid change will be necessary.

3. Repair Electrical Connections

• Locate the TCM and inspect the wiring harness.
• Use a multimeter to check the continuity of wires.
• Repair or replace any damaged wiring or connectors.

4. Replace the Transmission Range Sensor (if faulty)

• Disconnect the electrical connector from the transmission range sensor.
• Remove mounting bolts and take out the old sensor.
• Install the new sensor and torque the bolts to manufacturer specifications.
• Reconnect the electrical connector.

5. Reprogram or Replace TCM (if needed)

• If diagnostics indicate a faulty TCM, follow these steps:
  • Remove the TCM from its mounting location by unscrewing the bolts.
  • Disconnect the wiring harness.
  • Replace with a new or reprogrammed TCM.
  • Reinstall the TCM and reconnect the wiring harness.

6. Refill Transmission Fluid (if changed)

• If transmission fluid was drained, refill with the manufacturer-approved fluid type.
• Start the vehicle and let it run; cycle through all gears while checking fluid levels.