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How do I fix a non-responsive touchscreen in a 2021 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How do I fix a non-responsive touchscreen in a 2021 Toyota Highlander?

How do I fix a non-responsive touchscreen in a 2021 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

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

Problem Statement

Learn how to diagnose and fix a non-responsive touchscreen in your 2021 Toyota Highlander with step-by-step instructions and required tools.

Affected Component
touchscreen
Estimated Time
2-3 hours

Symptoms

  • •Touchscreen Not Responding
  • •Screen Flickering or Freezing
  • •Audio Control Issues
  • •Software Glitches

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

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
  • •Torx Screwdriver Set
  • •Plastic Trim Removal Tool
  • •Multimeter
  • •Soft Cloth
  • •Battery Terminal Wrench

Additional Information

Affected Component
touchscreen
Estimated Time
2-3 hours
Difficulty
medium
Severity
medium
Tools Required
6 items

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Fixing a Non-Responsive Touchscreen in a 2021 Toyota Highlander
Tools Required
  • OBD-II Scanner: To check for any diagnostic trouble codes (DTCs).
  • Torx Screwdriver Set: For accessing the touchscreen assembly.
  • Plastic Trim Removal Tool: To avoid damaging the dashboard.
  • Multimeter: To check for power supply issues.
  • Soft Cloth: For cleaning the screen.
  • Battery Terminal Wrench: For disconnecting the battery.

Repair Instructions

Step 1: Check for Diagnostic Trouble Codes
  1. Plug in the OBD-II Scanner: Connect it to the OBD-II port under the dashboard.
  2. Read Codes: Follow the scanner’s instructions to read any stored DTCs related to the infotainment system. Note any codes for further investigation.
Step 2: Perform a Soft Reset
  1. Power Off the Vehicle: Turn off the ignition and remove the keys.
  2. Wait: Leave the vehicle off for at least 5 minutes.
  3. Restart the Vehicle: Turn the ignition back on and check if the touchscreen is responsive.
Step 3: Disconnect the Battery
  1. Ensure Safety: Make sure all electronic devices are turned off.
  2. Disconnect Battery:
    • Use a battery terminal wrench to disconnect the negative (-) terminal from the battery.
    • Wait for about 10 minutes.
    • Reconnect the negative terminal securely.
  3. Test the Touchscreen: Start the vehicle and check if the touchscreen is responsive.
Step 4: Inspect and Remove the Touchscreen

  1. Remove Dashboard Trim:

    • Use a plastic trim removal tool to carefully pry off the dashboard trim surrounding the touchscreen.
    • Be gentle to avoid breaking any clips.

  2. Unscrew Touchscreen Assembly:

    • Locate the screws securing the touchscreen (typically Torx screws).
    • Use a Torx screwdriver to remove these screws.

  3. Disconnect the Touchscreen:

    • Carefully pull out the touchscreen from its housing.
    • Disconnect the wiring harness by gently pressing on the release tab and pulling it out.
Step 5: Check Connections and Inspect for Damage

  1. Inspect Wiring: Check for any loose connections, damaged wires, or burnt connectors.

  2. Test Power Supply:

    • Use a multimeter to check for voltage at the connector while the vehicle is on. Ensure there’s power (typically 12V) going to the touchscreen.

  3. Reinstall Touchscreen: If everything looks fine, reconnect the wiring harness and reinstall the touchscreen in reverse order.

Step 6: Update Software (if required)
  1. Download Updates: If a software update is available, follow the Toyota site instructions to download it onto a USB drive.
  2. Install Updates: Insert the USB into the vehicle's USB port and follow the prompts on the screen to install the update.
Step 7: Professional Help (if unresolved)
  • If the touchscreen remains unresponsive after all troubleshooting steps, it may be necessary to seek assistance from a professional technician or Toyota dealer for further diagnostics or replacement of the touchscreen unit.
Conclusion

Following these steps should help diagnose and potentially fix a non-responsive touchscreen in your 2021 Toyota Highlander. If issues persist after these efforts, professional assistance may be required to ensure proper functionality.