What are the common issues with the adaptive cruise control in the 2022 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

medium

Difficulty

medium

Severity

3 min read

590 words

Problem Statement

Learn about the common issues with the adaptive cruise control system in the 2022 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.

Affected Component

adaptive cruise control system

Symptoms

•Inconsistent Speed Control
•ACC Not Engaging
•Warning Messages
•System Sensitivity
•Camera or Sensor Malfunction

Diagnostic Steps

1
Visual Inspection
2
Check System Status
3
Review Settings
4
Test Drive

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
•Basic Hand Tools
•Multimeter
•Cleaning Supplies
•Service Manual

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Solution

Common Issues with Adaptive Cruise Control in the 2022 Toyota Highlander

The adaptive cruise control (ACC) system in the 2022 Toyota Highlander can encounter several issues, which may hinder its performance. Below are the common symptoms, diagnostic steps, tools required, and repair instructions for addressing these issues.

Common Symptoms

Inconsistent Speed Control: The vehicle may not maintain the set speed or may accelerate/decelerate unexpectedly.
ACC Not Engaging: The adaptive cruise control may fail to activate or engage.
Warning Messages: Dashboard warnings such as "ACC Unavailable" or other system alerts may display.
System Sensitivity: The system may be overly sensitive to vehicles in adjacent lanes or may react to non-existent obstacles.
Camera or Sensor Malfunction: The forward-facing camera or radar sensor may be blocked or malfunctioning, leading to reduced functionality.

Step 1: Visual Inspection

Check for Obstructions: Inspect the front grille area for dirt, debris, or ice that might obstruct the radar sensor and camera.
Inspect Wiring and Connectors: Look for damaged or loose wiring connected to the radar sensor and camera.

Step 2: Check System Status

Use a Diagnostic Scanner: Connect an OBD-II scanner to the vehicle’s diagnostic port. Check for any stored trouble codes (DTCs) related to the adaptive cruise control system.

Step 3: Review Settings

Check ACC Settings: Verify that the ACC settings in the vehicle’s menu are correctly configured and that the system is enabled.

Step 4: Test Drive

Perform a Test Drive: Activate the adaptive cruise control on a clear, straight road to observe its behavior. Note any irregularities in speed maintenance or responsiveness.

Tools Required

OBD-II Scanner: For reading trouble codes and diagnosing issues.
Basic Hand Tools: Such as screwdrivers, pliers, and wrenches for inspections and repairs.
Multimeter: To test electrical connections and sensors.
Cleaning Supplies: Such as microfiber cloths and cleaners for sensors.
Service Manual: For specific reference to the wiring diagrams and system operation.

Repair Instructions

Repairing Obstructions

Clean Sensors:
- Locate the radar sensor, usually positioned behind the front grille.
- Use a microfiber cloth and cleaner to gently wipe the sensor clean. Ensure it is free from dirt, ice, or debris.

Addressing Wiring Issues

Inspect and Repair Wiring:
- Disconnect the battery to ensure safety.
- Remove any protective covers to access the radar sensor wiring.
- Check for frayed wires or loose connections. Repair or replace any damaged components.
- Reassemble and reconnect the battery.

Resetting the System

Clear Trouble Codes:
- Using the OBD-II scanner, clear any stored DTCs related to the ACC.
- Turn the ignition off and on to reset the system.
Test the System:
- After addressing any issues and clearing codes, perform another test drive. Observe the adaptive cruise control to ensure normal function.

Sensor Calibration (if necessary)

Calibration:
- If the ACC still does not function correctly after repairs, it may require calibration.
- Refer to the service manual for specific calibration procedures, which typically involve specialized equipment and may need to be done at a dealership.

Conclusion

By following these diagnostic steps and repair instructions, you can troubleshoot and address common issues with the adaptive cruise control system in the 2022 Toyota Highlander. If problems persist, it is recommended to seek assistance from a certified Toyota technician or dealership, as they have the proper tools and knowledge for advanced diagnostics and repairs.