FAULTBASE
Error CodesASKCars
© 2026 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
What are the common problems with the adaptive cruise control in the 2018 Toyota Camry? - Toyota Camry
Home/Cars/Toyota/Camry/Eighth Generation (2018-present)/What are the common problems with the adaptive cruise control in the 2018 Toyota Camry?

What are the common problems with the adaptive cruise control in the 2018 Toyota Camry?

Toyota Camry Eighth Generation (2018-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
652 words

Problem Statement

Explore common issues with the adaptive cruise control system in the 2018 Toyota Camry, including symptoms, diagnostic steps, and repair instructions.

Affected Component
adaptive cruise control system
Estimated Time
2-4 hours

Symptoms

  • •The vehicle accelerates or decelerates unexpectedly.
  • •The system fails to maintain the set speed.
  • •The adaptive cruise control button does not activate.
  • •The display shows 'Cruise Control Unavailable.'
  • •The system frequently disengages or does not function correctly.
  • •Warning messages regarding sensor obstruction appear.
  • •The adaptive cruise control works intermittently.
  • •Random engagement/disengagement of the system.

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10

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
  • •Torque wrench
  • •Screwdrivers (various sizes)
  • •Cleaning supplies (soft cloth, mild detergent)
  • •Wiring diagram for electrical troubleshooting

Additional Information

Affected Component
adaptive cruise control system
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
6 items

Related Faults

Loading...

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation
Common Problems with Adaptive Cruise Control in the 2018 Toyota Camry

The adaptive cruise control system in the 2018 Toyota Camry, part of the XV70 generation, is designed to enhance driving convenience and safety. However, like any advanced driving assistance system, it may experience issues. Below are some common problems, their symptoms, and potential solutions.

1. Inconsistent Speed Control

Symptoms:

  • The vehicle accelerates or decelerates unexpectedly.
  • The system fails to maintain the set speed.

Diagnostic Steps:

  1. Check if the cruise control is properly calibrated.
  2. Inspect the throttle position sensor for proper operation.
  3. Look for any warning lights on the dashboard, particularly related to engine or cruise control.

Tools Required:

  • OBD-II scanner
  • Multimeter
  • Torque wrench

Repair Instructions:

  1. If abnormal readings are found with the OBD-II scanner, reset the error codes and see if they return.
  2. Inspect the throttle position sensor:
    • Disconnect the sensor connector.
    • Use the multimeter to check the voltage and resistance according to the service manual specifications.
    • Replace the sensor if readings are out of specification.
  3. Recalibrate the cruise control system if necessary, following the manufacturer's instructions.

2. Adaptive Cruise Control Not Engaging

Symptoms:

  • The adaptive cruise control button does not activate.
  • The display shows "Cruise Control Unavailable."

Diagnostic Steps:

  1. Verify that the vehicle speed is within the operational range for cruise control.
  2. Check the brake pedal switch operation.
  3. Inspect the adaptive cruise control module and wiring for damage.

Tools Required:

  • OBD-II scanner
  • Screwdrivers (various sizes)
  • Multimeter

Repair Instructions:

  1. If the vehicle speed is not within the operational range, ensure that the vehicle meets the speed requirements (generally above 25 mph).
  2. Test the brake pedal switch:
    • Locate the switch near the brake pedal.
    • Use the multimeter to check continuity when the brake pedal is pressed.
    • Replace the switch if it fails the continuity test.
  3. Inspect the wiring harness leading to the adaptive cruise control module for any signs of wear or damage. Repair or replace as needed.

3. Sensor Obstruction or Malfunction

Symptoms:

  • The system frequently disengages or does not function correctly.
  • Warning messages regarding sensor obstruction appear.

Diagnostic Steps:

  1. Inspect the front radar sensor for dirt, debris, or physical damage.
  2. Check for any calibration issues if the sensor has been replaced or serviced.

Tools Required:

  • Cleaning supplies (soft cloth, mild detergent)
  • Torque wrench

Repair Instructions:

  1. If the sensor is dirty or obstructed, clean it gently with a soft cloth and mild detergent. Ensure no scratches are present on the sensor lens.
  2. If the sensor appears damaged, replacement may be necessary:
    • Use a torque wrench to remove and install the new sensor according to the specified torque settings from the service manual.
    • After installation, perform a recalibration of the adaptive cruise control system.

4. Intermittent System Failures

Symptoms:

  • The adaptive cruise control works intermittently.
  • Random engagement/disengagement of the system.

Diagnostic Steps:

  1. Check for any electrical connections or wiring issues.
  2. Scan for stored DTCs (Diagnostic Trouble Codes) that may indicate specific issues.

Tools Required:

  • OBD-II scanner
  • Wiring diagram for electrical troubleshooting
  • Multimeter

Repair Instructions:

  1. Inspect the wiring harness and connectors for corrosion, loose connections, or broken wires. Repair as necessary.
  2. If DTCs are present, refer to the service manual for troubleshooting steps related to the specific codes. Address any identified issues, which could include replacing a faulty module or sensor.
Conclusion

The adaptive cruise control system in the 2018 Toyota Camry can exhibit several problems due to sensor issues, electrical malfunctions, or mechanical failures. Following the detailed diagnostic and repair steps provided will help address these common issues effectively. Always consult the vehicle’s service manual for specific details and specifications related to parts and procedures.