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What are the common problems with the heated mirrors in the 2020 Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What are the common problems with the heated mirrors in the 2020 Highlander?

What are the common problems with the heated mirrors in the 2020 Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
627 words

Problem Statement

Explore common issues with the heated mirrors of the 2020 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.

Affected Component
heated mirrors

Symptoms

  • •Mirrors Not Heating Up
  • •Uneven Heating
  • •Mirror Adjustment Malfunction
  • •Electrical Issues (Fuses, Wiring)
  • •Faulty Switch

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
  • •Thermometer (infrared or standard)
  • •Screwdriver set (Phillips and flathead)
  • •Pliers
  • •Fuse puller (optional)
  • •Wiring diagram for the heated mirror system (optional for diagnostics)

Additional Information

Affected Component
heated mirrors
Difficulty
medium
Severity
medium
Tools Required
6 items

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Common Problems with Heated Mirrors in the 2020 Toyota Highlander

The heated mirrors in the 2020 Toyota Highlander can experience a range of issues, primarily related to electrical components, connectivity, and control systems. Here are some common problems:

  1. Mirrors Not Heating Up
  2. Uneven Heating
  3. Mirror Adjustment Malfunction
  4. Electrical Issues (Fuses, Wiring)
  5. Faulty Switch
Tools Required
  • Multimeter
  • Thermometer (infrared or standard)
  • Screwdriver set (Phillips and flathead)
  • Pliers
  • Fuse puller (optional)
  • Wiring diagram for the heated mirror system (optional for diagnostics)
Repair Instructions

1. Replace a Blown Fuse

  • Locate the Fuse Box: Find the fuse box according to the owner's manual.
  • Remove the Blown Fuse: Use a fuse puller or pliers to remove the blown fuse.
  • Install a New Fuse: Replace it with a fuse of the same amperage rating.
  • Test the Mirrors: Activate the heated mirrors again.

2. Replace the Heated Mirror Switch

  • Remove the Trim Panel: Use a screwdriver to carefully remove the door trim panel to access the switch.
  • Disconnect the Old Switch: Unplug the connector from the back of the switch.
  • Install the New Switch: Connect the new switch, ensuring it clicks into place.
  • Reattach the Trim Panel: Secure the door panel back in place.

3. Repair or Replace Wiring

  • Inspect Wires: Identify any damaged wiring.
  • Repair Process: Use solder or butt connectors to repair any broken wires.
  • Replace the Wiring Harness: If the damage is extensive, consider replacing the entire mirror wiring harness.

4. Replace the Heated Mirror Assembly

  • Remove the Door Panel: If the mirror needs replacement, remove the door panel.
  • Remove the Mirror: Unscrew the mirror assembly from the door and disconnect the wiring harness.
  • Install the New Mirror: Connect the wiring harness to the new mirror and secure it in place with screws.
  • Reattach the Door Panel: Put the door panel back on securely.
Conclusion

By following these diagnostic steps and repair instructions, you can effectively troubleshoot and resolve common issues with the heated mirrors on a 2020 Toyota Highlander. Always ensure to consult the vehicle’s service manual for specific details related to your model and any safety precautions.