What could cause the power liftgate to malfunction in my 2021 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

648 words

Problem Statement

Learn about the symptoms, diagnostic steps, and repair instructions for a malfunctioning power liftgate in a 2021 Toyota Highlander.

Affected Component

power liftgate

Estimated Time

2-4 hours

Symptoms

•Liftgate Does Not Open/Close
•Partial Movement
•Unusual Noises
•Warning Lights

Diagnostic Steps

1
Visual Inspection
2
Check Key Fob and Interior Controls
3
Inspect the Liftgate Motor and Struts
4
Check Fuses and Relays
5
Scan for Diagnostic Trouble Codes (DTCs)

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II Scanner
•Multimeter
•Screwdrivers (Phillips and flathead)
•Torque wrench
•Trim removal tools
•Replacement fuses (if necessary)
•Replacement liftgate struts (if needed)
•Replacement motor (if needed)

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Solution

Power Liftgate Malfunction in a 2021 Toyota Highlander

Tools Required

OBD-II Scanner
Multimeter
Screwdrivers (Phillips and flathead)
Torque wrench
Trim removal tools
Replacement fuses (if necessary)
Replacement liftgate struts (if needed)
Replacement motor (if needed)

Repair Instructions

1. Replace Key Fob Battery

Open the key fob carefully with a flathead screwdriver.
Replace the old battery with a new CR2032 battery (or appropriate type).
Reassemble the key fob and test the liftgate operation.

2. Fuses and Relays Replacement

Remove the fuse box cover and locate the liftgate fuse.
Pull out the fuse using a fuse puller and inspect it. If blown, replace it with a new one of the same amperage.
For relays, remove the faulty relay and replace it with a new one.

3. Inspect and Replace Liftgate Motor

If the liftgate motor is not functioning, remove the interior trim panel from the tailgate using trim removal tools.
Disconnect the wiring harness from the motor.
Remove the motor mounting screws using a screwdriver and take out the motor.
Install the new motor by reversing the steps and reconnecting the wiring harness.

4. Replace Liftgate Struts

If struts are weak, support the liftgate with a prop rod.
Remove the old struts by unscrewing the retaining clips at each end.
Attach the new struts, ensuring they are securely fastened.
Test the liftgate operation to ensure it opens and closes smoothly.

5. Recheck Liftgate Functionality

After performing repairs, test the liftgate operation using the key fob, interior button, and liftgate handle.
Ensure it opens and closes without issues and that no unusual noises are present.

Conclusion

If after following these diagnostic and repair steps the power liftgate still does not function, it may be necessary to consult a Toyota dealership or a qualified automotive technician for further diagnosis, as there may be issues with the body control module or other underlying electrical problems.