What are some common problems with the Toyota Safety Sense features in a 2022 Highlander?

Common Problems with Toyota Safety Sense Features in a 2022 Highlander

Toyota Safety Sense (TSS) is designed to enhance vehicle safety and prevent collisions. However, users have reported several common issues with these systems in the 2022 Highlander. Below are some symptoms, diagnostic steps, and potential fixes for these problems.

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Common Symptoms

1. False Alerts or Malfunctions:

   • Unexpected activation of pre-collision warnings.
   • Lane departure alerts triggering without lane changes.

2. Inconsistent Operation:

   • Adaptive Cruise Control (ACC) not maintaining speed correctly.
   • Lane Keeping Assist (LKA) not functioning as expected.

3. Camera/Sensor Issues:

   • Front camera or radar sensor blocked warning.
   • Blind Spot Monitor (BSM) not detecting vehicles correctly.

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Step 1: Visual Inspection

Tools Required:

• Flashlight

• Cleaning cloth

• Inspection mirror

• Check the front camera and radar sensor area for obstructions (dirt, ice, or debris).

• Clean any dirt or grime from the camera lens and sensors.

• Inspect the alignment of the sensors; ensure they are not misaligned or damaged.

Step 2: Check for Error Codes

Tools Required:

• OBD-II Scanner

• Connect an OBD-II scanner to the vehicle’s diagnostic port.

• Retrieve any trouble codes related to the safety systems (e.g., C1201 for radar issues).

• Note the codes for further investigation.

Step 3: Test System Functionality

Tools Required:

• Vehicle with a clear, straight road for testing.

• Another vehicle for adaptive cruise control testing.

• Drive the vehicle in a safe, controlled environment.

• Test Adaptive Cruise Control by setting it to a specific speed and observing if it maintains that speed when approaching other vehicles.

• Test Lane Departure Alert and Lane Keeping Assist by intentionally drifting out of the lane and observing the system response.

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Repair Instructions

Problem 1: False Alerts or Malfunctions

1. Software Update:

   • Tools Required: Laptop with Toyota Techstream software.
   • Connect the laptop to the vehicle using a compatible OBD-II cable.
   • Check for available software updates for the TSS systems and apply any updates.

2. Calibration:

   • If issues persist, recalibrate the radar and camera systems.
   • Follow the calibration procedure outlined in the Toyota service manual, which typically involves specific driving patterns and conditions.

Problem 2: Inconsistent Operation (ACC/LKA)

1. Sensor Realignment:

   • Tools Required: Alignment tools (if necessary).
   • If sensors are found misaligned during the visual inspection, gently adjust them back to the correct position.
   • Ensure all mounting brackets are secure.

2. System Reset:

   • Disconnect the vehicle battery for 10 minutes to reset the systems.
   • Reconnect the battery and test the systems again.

Problem 3: Camera/Sensor Issues

1. Cleaning the Sensors:

   • Use a microfiber cloth and a gentle cleaner to clean the front camera and radar sensors carefully.
   • Check for any signs of physical damage to the sensors.

2. Replacing Faulty Components:

   • If sensor cleaning and recalibration do not resolve the issues, consider replacing faulty sensors.
   • Tools Required: Socket set, trim removal tools.
   • Remove the damaged sensor from its mounting location and replace it with a new unit, ensuring proper alignment and connection.

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Conclusion

If the problems persist after following the diagnostic and repair steps, it is recommended to visit a certified Toyota dealership or an experienced automotive technician for advanced diagnostics and repairs. They can access more in-depth tools and resources specific to Toyota vehicles.