How can I resolve an issue with the lane departure warning in my 2020 Highlander?

Issue: Lane Departure Warning Malfunction in 2020 Toyota Highlander

Tools Required

• OBD-II scanner
• Multimeter
• Screwdrivers (flathead and Phillips)
• Torque wrench
• Cleaning solution and lint-free cloth
• Calibration tool (if necessary)

Repair Instructions

A. Cleaning the Camera Sensor

1. Preparation:

   • Park the vehicle on a level surface and turn off the ignition.
   • Gather cleaning supplies (lint-free cloth and cleaning solution).

2. Locate the Camera:

   • The camera is usually mounted behind the rearview mirror on the windshield.

3. Clean the Camera:

   • Gently wipe the camera lens using the lint-free cloth and a small amount of cleaning solution.
   • Ensure there are no obstructions blocking the view of the camera.

B. Checking and Resetting the System

1. Connect OBD-II Scanner:

   • Locate the OBD-II port, usually under the dashboard near the driver's seat.
   • Connect the scanner and turn the ignition to the ON position without starting the engine.

2. Scan for Codes:

   • Follow the scanner's prompts to read any trouble codes.
   • Clear any codes and monitor if the issue persists.

3. System Reset:

   • If the codes relate to the lane departure system, try resetting the system through the scanner.

C. Calibration of the Lane Departure System

1. Calibration Tool:

   • If you have access to a calibration tool, follow the manufacturer’s instructions for recalibrating the lane departure warning system.
   • Most often, this involves driving the vehicle in a straight line at a specific speed.

2. Test Drive:

   • After calibration, take the vehicle for a test drive to ensure the lane departure warning system is functioning as intended.

D. Additional Repairs (if necessary)

1. Inspect Wiring:

   • If the system is still inoperative, inspect the wiring harness connected to the camera for any damage or loose connections.

2. Replace Camera (if defective):

   • If all other steps fail, you may need to replace the lane departure camera.
   • Remove the mounting screws for the camera.
   • Disconnect the wiring harness and install the new camera by reversing the process.
   • Recalibrate the new camera using the steps above.

Conclusion

If the lane departure warning system remains inoperative after performing the above steps, it is recommended to consult a qualified Toyota technician or service center for further diagnostics and repair. They can perform more in-depth checks, including software updates or more complex system diagnostics.