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How to fix the dashboard display issues in a 2021 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How to fix the dashboard display issues in a 2021 Toyota Highlander?

How to fix the dashboard display issues in a 2021 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
1-2 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
618 words

Problem Statement

Learn how to diagnose and fix dashboard display issues in a 2021 Toyota Highlander with detailed steps and required tools.

Affected Component
dashboard display
Estimated Time
1-2 hours

Symptoms

  • •Blank or flickering display
  • •Incorrect readings on gauges (speedometer, fuel gauge, etc.)
  • •Warning lights staying illuminated
  • •Touchscreen not responding or malfunctioning
  • •Dim or overly bright display

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

  • •Multimeter
  • •OBD-II scanner
  • •Screwdrivers (Phillips and flathead)
  • •Trim removal tools
  • •Torque wrench
  • •Replacement fuses (if necessary)
  • •Electrical contact cleaner (optional)

Additional Information

Affected Component
dashboard display
Estimated Time
1-2 hours
Difficulty
medium
Severity
medium
Tools Required
7 items

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Fixing Dashboard Display Issues in a 2021 Toyota Highlander

Symptoms of Dashboard Display Issues:

  1. Blank or flickering display.
  2. Incorrect readings on gauges (speedometer, fuel gauge, etc.).
  3. Warning lights staying illuminated.
  4. Touchscreen not responding or malfunctioning.
  5. Dim or overly bright display.
Tools Required
  • Multimeter
  • OBD-II scanner
  • Screwdrivers (Phillips and flathead)
  • Trim removal tools
  • Torque wrench
  • Replacement fuses (if necessary)
  • Electrical contact cleaner (optional)
Repair Instructions

Step 1: Battery Check

  1. Remove the key from the ignition.
  2. Use a multimeter to check the battery voltage as described above.
  3. If the voltage is low, charge or replace the battery as needed.

Step 2: Fuse Replacement

  1. Locate the fuse box.
  2. Identify the dashboard and infotainment system fuses using the diagram on the fuse box cover.
  3. Use a fuse puller or pliers to remove the blown fuse.
  4. Replace it with a new fuse of the same amperage.
  5. Reconnect the battery and test the display.

Step 3: DTC Retrieval

  1. Connect the OBD-II scanner to the vehicle’s OBD-II port (usually under the driver's side dashboard).
  2. Turn the ignition to the "ON" position without starting the engine.
  3. Follow the scanner's instructions to retrieve any DTCs.
  4. Document any codes and perform necessary repairs based on the codes retrieved.

Step 4: Inspecting Wiring and Connectors

  1. Disconnect the negative battery terminal to prevent any electrical shorts.
  2. Remove the dashboard panel using trim removal tools and screwdrivers.
  3. Inspect the connectors leading to the display. Ensure they are seated properly.
  4. Check for damaged wires or connectors. Repair or replace as necessary.
  5. If corrosion is present, use electrical contact cleaner on the connectors.

Step 5: Reassembly and Testing

  1. Reattach all connectors ensuring they are secure.
  2. Reinstall the dashboard panel and secure it with screws.
  3. Reconnect the battery terminal.
  4. Turn on the ignition and check the dashboard display for proper functionality.
Additional Considerations
  • If the problem persists after performing the above steps, there may be an issue with the Instrument Cluster or the Body Control Module (BCM). In this case, further diagnostic testing or professional assistance may be required.
  • Check for any software updates from Toyota that may address known issues with the dashboard display.

By following these steps, you should be able to diagnose and potentially fix the dashboard display issues in a 2021 Toyota Highlander. Always remember to work safely and consult with a professional if you are unsure at any step.