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What causes the dashboard to flicker in the 2020 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What causes the dashboard to flicker in the 2020 Toyota Highlander?

What causes the dashboard to flicker in the 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

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

Problem Statement

Learn about the causes of dashboard flickering in the 2020 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.

Affected Component
dashboard electronics

Symptoms

  • •Dashboard lights flicker intermittently
  • •Fluctuating brightness of the instrument cluster
  • •Dimming headlights
  • •Erratic behavior of electronic components
  • •Affected warning lights may illuminate unexpectedly

Diagnostic Steps

  1. 1
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  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
  • •Basic hand tools (screwdrivers, pliers, wrenches)
  • •Relay tester (optional)
  • •Wire brush or contact cleaner

Additional Information

Affected Component
dashboard electronics
Difficulty
medium
Severity
medium
Tools Required
5 items

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Back to Generation
Dashboard Flickering in the 2020 Toyota Highlander
Tools Required
  • Multimeter
  • OBD-II scanner
  • Basic hand tools (screwdrivers, pliers, wrenches)
  • Relay tester (optional)
  • Wire brush or contact cleaner
Repair Instructions

  1. Battery Replacement (if needed)

    • If the battery is found to be faulty, disconnect the negative terminal first, followed by the positive terminal.
    • Remove the old battery and install the new one, connecting the positive terminal first, then the negative.

  2. Alternator Replacement (if needed)

    • Disconnect the battery.
    • Remove the serpentine belt by loosening the tensioner.
    • Disconnect the electrical connections from the alternator.
    • Remove the alternator from its mounting bracket.
    • Install the new alternator and reconnect all electrical connections.
    • Reinstall the serpentine belt and reconnect the battery.

  3. Repair/Replace Ground Connections

    • Clean any corroded ground connections using a wire brush and contact cleaner.
    • If a wire is damaged, splice in a new wire or replace the entire ground wire as necessary.

  4. Fuse and Relay Replacement

    • Replace any blown fuses with the same amperage rating.
    • Test any suspect relays and replace them if they do not function properly.

  5. Reprogram or Reset BCM (if needed)

    • If the dashboard flickering persists after addressing the hardware issues, you may need to reset or reprogram the BCM using the OBD-II scanner.
    • Follow the manufacturer's instructions for reprogramming or resetting modules.
Conclusion

After completing the above steps, monitor the dashboard lights for any flickering. If the problem persists after all checks and repairs, further investigation into the BCM or wiring harnesses may be necessary. In such cases, consulting with a dealership or qualified automotive technician may be warranted.