my Toyota Corolla E170 (2013-2019) has a check engine light with P0700 code what does it mean

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the vehicle battery to prevent electrical shorts during repair.

2. Check Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick (if applicable) or access the fill plug.
  2. Remove the dipstick or fill plug and check the fluid level.
  3. Inspect the fluid for a burnt smell or dark coloration, indicating contamination.
• Tools Required: Transmission dipstick (if applicable), clean cloth.

3. Repair or Replace Wiring/Connectors

• Sub-steps:
  1. Visually inspect harness and connectors for corrosion or damage.
  2. Repair damaged wires or replace corroded connectors as necessary.
  3. Ensure all connections are secure before reassembling.
• Tools Required: Wire strippers, soldering iron (if necessary), electrical connectors.

4. Replace Transmission Control Module (if faulty)

• Sub-steps:
  1. Locate the TCM, usually found near the transmission or under the dashboard.
  2. Disconnect the electrical connectors from the TCM.
  3. Remove the mounting bolts and carefully take out the faulty TCM.
  4. Install the new TCM, ensuring it is securely mounted.
  5. Reconnect the electrical connectors.
• Tools Required: Socket set, torque wrench, possibly a TCM replacement.

5. Refill Transmission Fluid

• Sub-steps:
  1. If fluid was low, refill the transmission with the manufacturer-recommended fluid type.
  2. Start the engine and cycle through gears to circulate fluid.
  3. Check the fluid level again and add more if necessary.
• Tools Required: Funnel, transmission fluid.