How do I fix the rear liftgate not opening on my 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

599 words

Problem Statement

Learn how to diagnose and repair the rear liftgate not opening issue on your 2020 Toyota Highlander with step-by-step instructions.

Affected Component

rear liftgate

Estimated Time

2-3 hours

Symptoms

•Rear liftgate does not respond when the button is pressed on the key fob or the interior switch.
•Liftgate may open intermittently or not at all.
•No sound from the liftgate motor when attempting to open.
•Warning lights may appear on the dashboard, indicating an issue with the liftgate.

Diagnostic Steps

1
Check for any visible obstructions around the liftgate hinges and latch.
2
Inspect the wiring harness connected to the liftgate for any signs of damage or disconnection.
3
Use a multimeter to check the voltage output of the key fob button and the interior switch.
4
Check the liftgate motor’s power supply by locating the liftgate motor connector.
5
Inspect the fuse for the liftgate and check the relays associated with the liftgate operation.

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

•Multimeter
•Screwdrivers (Phillips and flathead)
•Torx screwdriver set
•Trim removal tool
•Wire connectors (if needed)
•OBD-II scanner (optional for troubleshooting)

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Diagnostic Steps

1
Check for any visible obstructions around the liftgate hinges and latch.
2
Inspect the wiring harness connected to the liftgate for any signs of damage or disconnection.
3
Use a multimeter to check the voltage output of the key fob button and the interior switch.
4
Check the liftgate motor’s power supply by locating the liftgate motor connector.
5
Inspect the fuse for the liftgate and check the relays associated with the liftgate operation.

Solution

Tools Required

Multimeter
Screwdrivers (Phillips and flathead)
Torx screwdriver set
Trim removal tool
Wire connectors (if needed)
OBD-II scanner (optional for troubleshooting)

Repair Instructions

Replacing the Liftgate Motor
- Remove the Interior Trim:
  - Use a trim removal tool to carefully remove the interior trim panel around the liftgate.
  - Unscrew any screws using a Torx screwdriver that are holding the panel in place.
- Disconnect the Wiring Harness:
  - Once the trim is removed, locate the wiring harness connected to the liftgate motor.
  - Disconnect the harness.
- Remove the Motor:
  - Unscrew the motor from its mounting position (usually requires a socket or wrench).
  - Pull the motor out gently.
- Install the New Motor:
  - Position the new motor in place and secure it using the original screws.
  - Reconnect the wiring harness.
- Reassemble the Trim:
  - Reinstall the interior trim panel by aligning it properly and pressing it back into place.
  - Ensure all screws are tightened.
Replacing the Liftgate Switch
- If the switch was found to be faulty, remove the old switch from the dashboard or door panel.
- Disconnect the wiring harness connected to the switch.
- Install the new switch by reconnecting the harness and securing it in place.
- Reassemble any trim that was removed.
Testing the Liftgate
- Reconnect the battery if it was disconnected during repairs.
- Test the liftgate operation using the key fob and the interior switch.
- Watch for any signs of abnormal operation, unusual noises, or failure to open.

Conclusion

If after these steps the liftgate still does not operate correctly, it may require further diagnosis involving the Body Control Module (BCM) or additional wiring issues. In such cases, consulting with a professional technician or dealership may be necessary for advanced troubleshooting.