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How can I troubleshoot the power door locks not working in a 2020 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How can I troubleshoot the power door locks not working in a 2020 Toyota Highlander?

How can I troubleshoot the power door locks not working in a 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

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

Problem Statement

Learn how to troubleshoot and repair power door locks not working in a 2020 Toyota Highlander with step-by-step diagnostic and repair instructions.

Affected Component
Power Door Locks
Estimated Time
2-4 hours

Symptoms

  • •Power Door Locks Inoperative
  • •Fob/Key Switch Response
  • •No Audible Feedback
  • •No Warning Lights

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  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

  • •Battery tester or multimeter
  • •Screwdriver set
  • •Visual inspection
  • •OBD-II scanner
  • •Jumper wires
  • •Trim removal tool

Additional Information

Affected Component
Power Door Locks
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
6 items

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Troubleshooting Power Door Locks Not Working in a 2020 Toyota Highlander
Repair Instructions

  1. Replacing the Key Fob Battery

    • Open the key fob using a small flat-head screwdriver.
    • Remove the old battery and replace it with a new one (ensure correct orientation).
    • Reassemble the fob and test the locks.

  2. Replacing the Door Lock Switch

    • Remove the door panel:
      • Use a screwdriver to remove screws securing the panel.
      • Carefully pry off the panel using a trim removal tool.
      • Disconnect any electrical connectors.
    • Remove the faulty door lock switch by unscrewing or unclipping it from the door panel.
    • Install the new switch by reversing the removal steps and test the locks.

  3. Repairing/Replacing Wiring

    • If wiring is damaged, it can be repaired by splicing in new wire or replacing a section of the harness.
    • Ensure all connections are soldered and insulated with heat shrink or electrical tape.

  4. Replacing the Door Lock Actuator

    • Follow the steps to remove the door panel.
    • Disconnect the actuator from its mounting and wiring.
    • Install the new actuator by reversing the steps and reconnecting the wiring.
    • Test the locks before reassembling the door panel.

  5. Replacing the Central Locking Module

    • If the central locking module is determined to be faulty, disconnect the battery.
    • Remove the module from its location and disconnect the wiring harness.
    • Install the new module and reconnect the battery.
    • Test the locking system.
Conclusion

Once all steps are completed, test the power door locks using both the key fob and the interior switches. If the locks still do not operate correctly, further diagnostics may be required, potentially involving professional assistance or more advanced tools. Always consult the vehicle’s service manual for specific details related to the electrical systems.