FAULTBASE
Error CodesASKCars
© 2026 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
How do I fix the seat adjustment not working in a 2020 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How do I fix the seat adjustment not working in a 2020 Toyota Highlander?

How do I fix the seat adjustment not working in a 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-3 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
673 words

Problem Statement

Learn how to diagnose and repair seat adjustment problems in your 2020 Toyota Highlander with our step-by-step guide.

Affected Component
seat adjustment system
Estimated Time
2-3 hours

Symptoms

  • •Seat does not move forward or backward
  • •Seat does not recline
  • •Seat does not adjust height
  • •No sound or movement when operating the seat adjustment controls

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7

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
  • •Wire stripper and connectors
  • •Fuse puller
  • •Screwdriver set

Additional Information

Affected Component
seat adjustment system
Estimated Time
2-3 hours
Difficulty
medium
Severity
medium
Tools Required
4 items

Related Faults

Loading...

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation

Fixing the Seat Adjustment Not Working in a 2020 Toyota Highlander

If the seat adjustment on your 2020 Toyota Highlander is not functioning, it can be due to a range of issues including electrical problems, a faulty switch, or a blown fuse. Below is a detailed guide to diagnose and repair the problem.

Step 1: Visual Inspection
  1. Check Seat Controls: Ensure that the seat adjustment controls are not stuck or obstructed by any debris.
  2. Inspect Wiring: Look under the seat for any visible damage to the wiring harness connected to the seat motor.
Step 2: Check for Power

  1. Tools Required:

    • Multimeter
    • Wire stripper and connectors (if needed)
    • Fuse puller
    • Screwdriver set

  2. Access the Fuse Box: Refer to the owner’s manual to locate the fuse box. For the Highlander, it is usually found under the dashboard or in the engine compartment.

  3. Inspect Fuses:

    • Remove the fuse associated with the seat adjustment (refer to the fuse diagram in the owner’s manual).
    • Check if the fuse is blown. If so, replace it with a fuse of the same amperage.

  4. Test Power at the Seat Connector:

    • Disconnect the seat connector (make sure the seat is in a comfortable position beforehand).
    • Set the multimeter to the DC voltage setting.
    • With the ignition on (but engine off), test the voltage at the connector:
      • Black probe to ground
      • Red probe to the power wire (usually a red wire).
    • You should see approximately 12 volts when the seat adjustment control is pressed. If not, there is a power issue.
Step 3: Check Seat Motor and Switch

  1. Test the Switch:

    • With the multimeter, check continuity across the switch terminals when pressing the seat adjustment controls.
    • If there is no continuity, the switch is likely faulty and needs replacement.

  2. Test the Seat Motor:

    • If the switch is good, check the seat motor:
    • Connect the multimeter to the motor terminals.
    • Press the seat adjustment controls and see if the multimeter shows voltage. If it does and the motor doesn’t move, the motor may be faulty.
Repair Instructions
Repairing a Faulty Switch

  1. Remove the Switch:

    • Use a screwdriver to carefully pry out the seat adjustment switch from the armrest.
    • Disconnect the wiring harness from the back of the switch.

  2. Replace with a New Switch:

    • Connect the new switch to the wiring harness and install it back into the armrest.
    • Ensure it clicks into place securely.
Replacing the Seat Motor

  1. Remove the Seat:

    • Slide the seat to the furthest forward position.
    • Unscrew the bolts securing the seat to the floor (usually located at the back of the seat).
    • Disconnect the wiring harness from the seat and carefully lift it out of the vehicle.

  2. Remove the Motor:

    • Locate the seat motor (usually found under the seat).
    • Unscrew the motor from its mounting bracket.
    • Disconnect the wiring from the motor.

  3. Install New Motor:

    • Connect the wiring to the new motor.
    • Secure the motor to the seat frame using the screws.
    • Reinstall the seat in the vehicle and secure it with the bolts.
Final Steps
  1. Reconnect Battery: If you disconnected the battery during the process, reconnect it.
  2. Test Functionality:
    • Test all seat adjustments to ensure everything is working properly.
  3. Secure All Covers and Components:
    • Ensure that all covers and components are back in their original positions.
Conclusion

If after these steps the seat adjustment is still not functioning, it may be advisable to consult with a professional technician or consider a more in-depth electrical issue. Regular maintenance and inspection can help prevent such issues in the future.