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What are the known problems with the 2020 Toyota Highlander's safety features? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What are the known problems with the 2020 Toyota Highlander's safety features?

What are the known problems with the 2020 Toyota Highlander's safety features?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
5 min read
809 words

Problem Statement

Explore the common issues related to the safety features of the 2020 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.

Affected Component
Safety Features

Symptoms

  • •Adaptive cruise control system fails to engage
  • •Inconsistent speed adjustments when following other vehicles
  • •Warning lights on the dashboard indicating a system issue
  • •Lane departure warning does not activate
  • •Lane-keeping assist feature does not steer the vehicle back into the lane
  • •Unusual beeping or alerts without clear cause
  • •AEB system activates unnecessarily
  • •AEB fails to activate in situations where it should
  • •BSM warning lights do not activate when vehicles are in blind spots
  • •False alerts occur when there are no vehicles present

Diagnostic Steps

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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

  • •OBD-II scanner
  • •Cleaning supplies
  • •Laptop or tablet for software updates
  • •Screwdriver set
  • •Possibly a multimeter
  • •Torx or socket set

Additional Information

Affected Component
Safety Features
Difficulty
medium
Severity
medium
Tools Required
6 items

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Back to Generation
Known Problems with the 2020 Toyota Highlander's Safety Features

The 2020 Toyota Highlander, part of the fourth generation (XU70), is equipped with several advanced safety features, including Toyota Safety Sense 2.0. However, there have been reported issues related to these safety features. Below are the common problems, their symptoms, diagnostic steps, and potential resolutions.

1. Adaptive Cruise Control Malfunction
Tools Required:
  • OBD-II scanner
  • Cleaning supplies (for sensor cleaning)
  • Laptop or tablet for software updates (if necessary)

Repair Instructions:

  1. Clear Obstructions: Clean the radar sensor located behind the front grille.
  2. Reset the System: If an error code is found, clear it and test the adaptive cruise control again.
  3. Software Update: If a software issue is indicated, proceed to update the ECU with the latest software from Toyota.
  4. Replace Faulty Components: If the problem persists, consider replacing the radar sensor or related wiring.
2. Lane Departure Alert Failure
Tools Required:
  • OBD-II scanner
  • Cleaning supplies (for camera cleaning)
  • Screwdriver set (for camera adjustment)

Repair Instructions:

  1. Clean Camera: Wipe the camera lens with a soft cloth to remove any dirt or smudges.
  2. Adjust Camera Position: If misaligned, adjust the camera according to manufacturer specifications.
  3. Clear Codes: Reset any trouble codes found during the diagnostic step and test the system again.
  4. Replace Camera: If issues persist, consider replacing the camera or associated wiring.
3. Automatic Emergency Braking (AEB) Issues
Tools Required:
  • OBD-II scanner
  • Cleaning supplies
  • Possibly a multimeter (for electrical checks)

Repair Instructions:

  1. Clean Sensors: Ensure that both the radar and camera sensors are clean and unobstructed.
  2. Check System Settings: Access the vehicle's settings menu and ensure AEB is enabled.
  3. Reset System: Clear any trouble codes and test the AEB system.
  4. Replace Sensors: If the system continues to malfunction, consider replacing the radar or camera sensor.
4. Blind Spot Monitoring System (BSM) Malfunction
Tools Required:
  • OBD-II scanner
  • Cleaning supplies
  • Torx or socket set (if sensor replacement is necessary)

Repair Instructions:

  1. Clean Sensors: Remove any dirt or debris from the BSM sensors.
  2. Inspect Wiring: Check for damaged wiring or connectors related to the BSM system.
  3. Clear Codes: After addressing any visible issues, clear codes and test the BSM.
  4. Replace Sensors: If problems persist, replace the BSM sensors in the rear bumper.
Conclusion

While the 2020 Toyota Highlander is equipped with advanced safety features, some users have reported issues. Following the diagnostic steps outlined above can help identify and resolve these issues effectively. Always consult the vehicle's service manual for specific procedures and torque specifications when performing repairs. If problems persist or are beyond your expertise, it is advisable to seek professional assistance.