How can I address issues with the power liftgate in my 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

781 words

Problem Statement

Learn how to diagnose and repair power liftgate issues in your 2020 Toyota Highlander with detailed steps and required tools.

Affected Component

power liftgate

Estimated Time

2-4 hours

Symptoms

•The liftgate does not open or close when activated by the key fob or interior switch.
•The liftgate opens partially and then stops.
•The liftgate opens but does not close.
•Unusual noises such as grinding or clicking when the liftgate is activated.

Diagnostic Steps

1
Visual Inspection
2
Testing the Key Fob
3
Electrical Testing
4
Inspect Liftgate Struts and Motor

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

•Flashlight
•Multimeter
•Socket set
•Torque wrench
•Screwdriver set
•Trim removal tools
•Wiring diagram

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Back to Generation

Troubleshooting Power Liftgate Issues in a 2020 Toyota Highlander

Step 1: Visual Inspection

Tools Required:

Flashlight
Multimeter (for electrical testing)

Instructions:

Check the Liftgate Mechanism:
- Inspect the liftgate for any visible obstructions or physical damage.
- Ensure that the hinges and struts are not bent or broken.
- Look for loose wiring or connectors around the liftgate area.
Inspect the Fuses:
- Locate the fuse box (typically under the dashboard or in the engine compartment).
- Check the owner’s manual for the specific fuse related to the power liftgate and inspect it for continuity.

Step 2: Testing the Key Fob

Tools Required:

Multimeter

Instructions:

Test Key Fob Battery:
- Remove the battery from the key fob.
- Use the multimeter to check the voltage of the battery. It should be around 3 volts.
- If the battery is low, replace it with a new one.
Functionality Test:
- Press the liftgate button on the key fob while standing near the vehicle to check for a response.

Step 3: Electrical Testing

Tools Required:

Multimeter
Wiring diagram (from service manual)

Instructions:

Check Power to Liftgate Motor:
- Using the wiring diagram, locate the power and ground wires for the liftgate motor.
- Use the multimeter to check for voltage at the connector when the liftgate button is pressed.
- Expected voltage should be approximately 12 volts. If there is no voltage, trace back to the switch and check for continuity.
Test the Liftgate Switch:
- If the liftgate motor is receiving power, check the liftgate switch inside the vehicle.
- Remove the switch and test for continuity when the button is pressed.

Step 4: Inspect Liftgate Struts and Motor

Tools Required:

Socket set
Torque wrench

Instructions:

Examine Liftgate Struts:
- Check the struts for any signs of wear or leakage. If they are weak, they may need replacement.
- With the liftgate open, observe whether it holds its position. If it falls, replace the struts.
Inspect Liftgate Motor:
- If all electrical tests are satisfactory and the struts are functional, the liftgate motor might be faulty.
- Carefully remove the interior trim panel to access the motor.
- Disconnect the motor and test it with direct power from a battery. If it does not operate, replace the motor.

Repair Instructions

Replacing the Liftgate Motor

Tools Required:

Socket set
Screwdriver set
Trim removal tools
Torque wrench

Instructions:

Remove Interior Trim Panel:
- Use trim removal tools to safely detach the interior trim covering the liftgate motor.
- Unscrew any fasteners holding the panel in place and carefully lift it off.
Disconnect Old Motor:
- Locate the liftgate motor at the bottom of the liftgate assembly.
- Disconnect the wiring harness from the motor.
Remove the Old Motor:
- Unscrew the motor from its mounting bracket using the socket set.
- Remove the motor from the vehicle.
Install New Motor:
- Position the new liftgate motor in place and secure it with screws.
- Reconnect the wiring harness to the new motor.
Reassemble Interior Trim:
- Carefully reattach the interior trim panel, ensuring all clips and screws are secured.

Replacing Liftgate Struts

Tools Required:

Socket set
Torque wrench

Instructions:

Remove Old Struts:
- Using a socket set, remove the bolts securing the strut to the liftgate and vehicle body.
- Carefully detach the strut from both ends.
Install New Struts:
- Position the new strut in place and secure it with bolts.
- Ensure the struts are oriented correctly for proper operation.
Test Functionality:
- Open and close the liftgate several times to ensure the new components are functioning properly.

Final Steps

After completing repairs, test the liftgate with the key fob and interior switch.
Verify that the liftgate opens and closes smoothly and without any unusual noises.
If issues persist, consider consulting with a professional service technician or the dealership for advanced diagnostics.

By following these detailed steps, you should be able to effectively diagnose and repair issues with the power liftgate in your 2020 Toyota Highlander.