how to fix P0700 code in Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Gather all tools and parts needed for the repair.
• Disconnect the battery to prevent any electrical shorts.
• Allow the vehicle to cool down if the engine has been running.

2. Address Transmission Fluid Issues

• Tools Required: Transmission fluid pump, socket set, funnel
  • 1. Locate the transmission fluid pan and drain plug.
  • 1. Remove the drain plug and allow the old transmission fluid to fully drain into a suitable container.
  • 1. Replace the drain plug and tighten to manufacturer specifications (consult service manual for torque specifications).
  • 1. Remove the transmission fluid dipstick and add new transmission fluid through the dipstick tube using a funnel, ensuring to use the correct fluid type as per the owner's manual.

3. Repair or Replace Faulty Components

• Tools Required: Multimeter, socket set, torque wrench
  • 1. If wiring or connectors were found damaged, repair or replace them as necessary.
  • 1. If the TCM is faulty, remove the old module by unbolting it from its mount and disconnecting the wiring harness.
  • 1. Install the new TCM by connecting the wiring harness and securing it in place with the bolts.
  • 1. If sensors (throttle position or vehicle speed) were found faulty, remove them carefully and replace them with new parts.

4. Reconnection and Testing

• Tools Required: OBD-II scanner
  • 1. Reconnect the battery and ensure all components are securely in place.
  • 1. Start the vehicle and check for any warning lights on the dashboard.
  • 1. Use the OBD-II scanner to clear the P0700 code and any related codes, then perform a test drive to ensure proper shifting and operation.