Toyota Highlander XU70 (2020-Present) P0700 code what does it mean

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Raise the vehicle using a jack and secure it on jack stands.

2. Fluid Inspection and Replacement

• Fluid Check

  • Remove the transmission dipstick and check the fluid level.
  • If the fluid is low, top it up with the manufacturer-recommended ATF (Automatic Transmission Fluid).

• Fluid Replacement

  • If the fluid is discolored or has a burnt smell, drain the old fluid using a fluid pump.
  • Replace with fresh ATF, ensuring to use the correct type as specified in the owner’s manual.

3. Wiring and Connector Inspection

• Inspect the wiring harness connected to the TCM and transmission for any frayed wires or loose connections.
• Clean and reseat all connectors to ensure a solid electrical connection.

4. TCM Testing and Replacement

• If the TCM is suspected to be faulty, remove it from its mounting location.
  • Disconnect any wiring harnesses attached to the TCM.
  • Remove the screws or bolts holding the TCM in place and carefully lift it out.
• Test the TCM using a multimeter to check for proper output signals.
• If defective, replace the TCM with a new or refurbished unit and reassemble.

5. Reassembly and Final Checks

• Reconnect all wiring harnesses and ensure all connections are secure.
• Reinstall the transmission dipstick and any covers that were removed.
• Reconnect the negative battery terminal.