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What should I do if my 2021 Toyota Highlander’s dashboard is flickering? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What should I do if my 2021 Toyota Highlander’s dashboard is flickering?

What should I do if my 2021 Toyota Highlander’s dashboard is flickering?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
550 words

Problem Statement

Learn how to diagnose and fix dashboard flickering issues in your 2021 Toyota Highlander with step-by-step instructions and required tools.

Affected Component
dashboard

Symptoms

  • •Flickering lights or indicators on the dashboard
  • •Dimming headlights or other electrical components
  • •No warning lights or engine malfunctions indicated

Diagnostic Steps

  1. 1
  2. 2
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  4. 4
  5. 5
  6. 6

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 (preferably Toyota Techstream)
  • •Basic hand tools (screwdrivers, pliers, wrenches)
  • •Fuse puller

Additional Information

Affected Component
dashboard
Difficulty
medium
Severity
medium
Tools Required
4 items

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Back to Generation
Problem: Dashboard Flickering on 2021 Toyota Highlander
Tools Required
  • Multimeter
  • OBD-II scanner (preferably Toyota Techstream)
  • Basic hand tools (screwdrivers, pliers, wrenches)
  • Fuse puller
Repair Instructions

Step 1: Battery and Alternator Testing

  1. Battery Test:

    • Connect the multimeter leads to the battery terminals.
    • Note the voltage readings. If the battery is below 12.4V, consider charging or replacing it.

  2. Alternator Test:

    • Start the engine and repeat the voltage test at the battery.
    • If the voltage drops significantly when the negative terminal is removed, replace the alternator.

Step 2: Tighten Ground Connections

  1. Locate the negative battery terminal and ensure it is securely fastened.
  2. Follow the ground wire to where it connects to the chassis and ensure it is tight and free of corrosion.

Step 3: Replace Fuses/Relays

  1. If any fuses are blown, replace them with the same amperage rating.
  2. If a relay appears faulty, swap it with a similar relay from a non-critical circuit to check functionality.

Step 4: Software Update

  1. Connect the OBD-II scanner to the vehicle's diagnostic port.
  2. Check for any software updates. If available, follow the manufacturer's instructions to perform the update.
Final Checks
  • After performing these diagnostic and repair steps, start the vehicle and observe the dashboard for flickering.
  • If the problem persists, further investigation into the dashboard cluster itself may be required, which could involve removing the cluster for inspection or replacement.
Conclusion

If you have performed all the above steps and the flickering continues, it may be necessary to consult a professional technician or visit a Toyota dealership for a thorough diagnosis.