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What are the common issues with the 2020 Toyota Highlander’s cruise control system? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What are the common issues with the 2020 Toyota Highlander’s cruise control system?

What are the common issues with the 2020 Toyota Highlander’s cruise control system?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
604 words

Problem Statement

Explore common issues with the 2020 Toyota Highlander's cruise control system, including symptoms, diagnostic steps, and tools required for troubleshooting.

Affected Component
cruise control system

Symptoms

  • •Cruise Control Not Engaging
  • •Cruise Control Disengages Unexpectedly
  • •Erratic Speed Control
  • •Indicator Light Malfunction
  • •Inconsistent Behavior

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
  • •Multimeter
  • •Basic hand tools (screwdrivers, sockets, wrenches)
  • •Vehicle service manual (for reference)
  • •Fuse tester
  • •Wiring harness repair kit (if needed)

Additional Information

Affected Component
cruise control system
Difficulty
medium
Severity
medium
Tools Required
6 items

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Common Issues with the 2020 Toyota Highlander’s Cruise Control System

The 2020 Toyota Highlander, part of the fourth generation (XU70), may experience several issues with its cruise control system. Below are the common symptoms, diagnostic steps, tools required, and repair instructions for troubleshooting these issues.

Common Symptoms

  1. Cruise Control Not Engaging

    • The cruise control system does not activate when the cruise control button is pressed.

  2. Cruise Control Disengages Unexpectedly

    • The system turns off unexpectedly during operation, causing the vehicle to return to manual control.

  3. Erratic Speed Control

    • The vehicle speed fluctuates or does not maintain the set speed correctly.

  4. Indicator Light Malfunction

    • The cruise control indicator light on the dashboard does not illuminate or remains illuminated when the system is off.

  5. Inconsistent Behavior

    • The cruise control works intermittently, engaging and disengaging without user input.
Tools Required
  • OBD-II scanner
  • Multimeter
  • Basic hand tools (screwdrivers, sockets, wrenches)
  • Vehicle service manual (for reference)
  • Fuse tester
  • Wiring harness repair kit (if needed)
Repair Instructions

1. Cruise Control Not Engaging

  • Step 1: Inspect the cruise control switch for damage.
  • Step 2: Check the associated fuse and replace if blown.
  • Step 3: If the switch is functional, scan for DTCs to identify further issues.

2. Cruise Control Disengages Unexpectedly

  • Step 1: Test the brake pedal switch using a multimeter. It should be closed (continuity) when the brake is not pressed and open when pressed.
  • Step 2: If faulty, replace the brake pedal switch.

3. Erratic Speed Control

  • Step 1: Inspect and test the speed sensor. Replace if the sensor is faulty.
  • Step 2: Check for any vacuum leaks in the throttle body area or intake manifold, as they can affect throttle response.

4. Indicator Light Malfunction

  • Step 1: Inspect the cruise control indicator bulb or LED for functionality.
  • Step 2: If the light remains on, check for DTCs that may indicate a fault in the system.

5. Inconsistent Behavior

  • Step 1: Perform a complete system reset by disconnecting the vehicle battery for about 10-15 minutes.
  • Step 2: Reconnect the battery and test the cruise control again.
  • Step 3: If problems persist, carefully inspect all wiring and connectors related to the cruise control module for loose or damaged connections.
Conclusion

If the above steps do not resolve the issue, it may be advisable to consult a certified Toyota technician or visit a dealership for further diagnosis. Cruise control systems can be complex, and specialized diagnostic tools may be required for advanced troubleshooting.