How can I fix the non-responsive touchscreen in my 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

medium

Difficulty

medium

Severity

3 min read

576 words

Problem Statement

Learn how to troubleshoot and fix the non-responsive touchscreen issue in your 2020 Toyota Highlander with step-by-step diagnostic and repair instructions.

Affected Component

infotainment system

Symptoms

•The touchscreen display does not respond to touch inputs.
•Some or all of the screen areas are unresponsive.
•The screen may freeze or display incorrect information.
•Other infotainment system functions (e.g., audio, navigation) may be affected.

Diagnostic Steps

1
Perform a Soft Reset
2
Check Battery Voltage
3
Inspect for Software Updates
4
Inspect Connections

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
•Trim Removal Tool
•Socket Set
•Screwdriver Set
•OBD-II Scanner

Related Faults

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Solution

Fixing Non-Responsive Touchscreen in a 2020 Toyota Highlander

Tools Required

Multimeter: For checking battery voltage.
Trim Removal Tool: To access the infotainment unit without damaging the dashboard trim.
Socket Set: For removing screws if needed.
Screwdriver Set: For any necessary disassembly.
OBD-II Scanner: To check for any fault codes related to the infotainment system.

Repair Instructions

Step 1: Soft Reset

Locate the Power Button on the touchscreen.
Press and Hold the power button for 10 seconds.
Observe if the screen comes back to life after resetting.

Step 2: Check Battery Voltage

Turn Off the Vehicle.
Set the Multimeter to the DC voltage setting.
Connect the Multimeter Probes: Red lead to the positive terminal and black lead to the negative terminal of the battery.
Read the Voltage: Ensure it reads around 12.6 volts.
If the voltage is low, charge the battery or test it for replacement.

Step 3: Software Update

Start the Vehicle and turn on the infotainment system.
Access the Settings Menu: Use the touchscreen if responsive.
Navigate to Software Update: Follow prompts to check for any updates.
Download and Install any available updates.

Step 4: Inspect Connections

Turn Off the Vehicle and remove the key.
Use the Trim Removal Tool to carefully pry off the trim surrounding the touchscreen.
Remove Screws (if any) securing the infotainment unit.
Gently Pull the Unit Out: Be cautious of any connected wiring.
Inspect the Wiring Harness: Ensure all connectors are securely plugged in. If any wires are damaged, they may need to be repaired or replaced.
Reconnect All Connectors: Ensure they are securely fastened.
Reassemble the Infotainment Unit: Reverse the disassembly steps.

Step 5: Reset to Factory Settings (if necessary)

Access the Settings Menu on the touchscreen.
Navigate to System Settings.
Select Factory Reset: Be aware that this will erase all stored settings and data.
Follow Prompts to confirm the reset.

Conclusion

If, after following these steps, the touchscreen remains unresponsive, the issue may be deeper, possibly involving a faulty touchscreen or a problem with the infotainment system’s hardware. In that case, it is advisable to consult a professional technician or visit a Toyota dealership for further diagnosis and repair.