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

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

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)

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Solution

Fixing Dashboard Display Issues in a 2021 Toyota Highlander

Symptoms of Dashboard Display Issues:

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.

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

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

Step 2: Fuse Replacement

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

Step 3: DTC Retrieval

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

Step 4: Inspecting Wiring and Connectors

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

Step 5: Reassembly and Testing

Reattach all connectors ensuring they are secure.
Reinstall the dashboard panel and secure it with screws.
Reconnect the battery terminal.
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.

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

Problem Statement

Symptoms

Diagnostic Steps

Solution

💡 Expert Tip

Verification

Prevention Tips

Tools & Equipment Required

Related Faults

Share this solution

Comments

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

Problem Statement

Symptoms

Diagnostic Steps

Solution

Step 1: Battery Check

Step 2: Fuse Replacement

Step 3: DTC Retrieval

Step 4: Inspecting Wiring and Connectors

Step 5: Reassembly and Testing

💡 Expert Tip

Verification

Prevention Tips

Tools & Equipment Required

Related Faults

Share this solution

Comments

Step 1: Battery Check

Step 2: Fuse Replacement

Step 3: DTC Retrieval

Step 4: Inspecting Wiring and Connectors

Step 5: Reassembly and Testing