Fixing a Malfunctioning Tailgate on a 2022 Toyota Highlander

Tools Required

• Flathead screwdriver
• Phillips screwdriver
• Multimeter
• OBD-II scanner (optional)
• Replacement fuses (if necessary)
• Replacement tailgate lock actuator (if faulty)
• Wiring harness repair kit (if necessary)

Repair Instructions

Step 1: Power Supply and Fuses

1. Check and Replace Fuses:
   • If any fuses were blown during the inspection, replace them with new ones of the same amperage.
   • Retest the tailgate operation.

Step 2: Key Fob and Interior Switch

1. Replace Key Fob Battery:
   • Open the key fob and replace the old battery with a new one.
   • Retest the tailgate.

Step 3: Inspect and Replace the Tailgate Lock Actuator

1. Remove the Interior Trim Panel:

   • Use a flathead screwdriver to gently pry off the interior trim panel of the tailgate. Be cautious not to damage the clips.
   • Unscrew any visible screws and gently pull the panel away from the tailgate.

2. Access the Lock Actuator:

   • Locate the tailgate lock actuator on the inside of the tailgate.
   • Disconnect the electrical connector from the actuator.

3. Test the Actuator:

   • Use a multimeter to test the actuator for continuity. If there is no continuity, replace the actuator.
   • If it has continuity, check for power at the connector when the tailgate switch is activated.

4. Replace the Actuator:

   • If faulty, remove the actuator from its mounting bracket (usually held by screws) and replace it with the new actuator.
   • Reconnect the electrical connector.

Step 4: Reassemble the Tailgate

1. Reinstall the Interior Trim Panel:
   • Align the trim panel back onto the tailgate and press it into place until it clicks.
   • Ensure all screws are tightened.

Step 5: Final Testing

1. Test the Tailgate:
   • Use the key fob and interior switch to open and close the tailgate.
   • Ensure it works smoothly and stays open when lifted.

Troubleshooting

• If the tailgate still does not function correctly after these repairs, consider consulting a professional technician for further diagnosis, as there may be deeper electronic issues or additional components that require inspection.

By following these steps, you should be able to diagnose and repair a malfunctioning tailgate on your 2022 Toyota Highlander. Always refer to your vehicle’s service manual for specific torque specifications and safety instructions.