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How can I fix the adaptive cruise control not working in a 2019 Toyota Camry? - Toyota Camry
Home/Cars/Toyota/Camry/Eighth Generation (2018-present)/How can I fix the adaptive cruise control not working in a 2019 Toyota Camry?

How can I fix the adaptive cruise control not working in a 2019 Toyota Camry?

Toyota Camry Eighth Generation (2018-present)

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

Problem Statement

Learn how to diagnose and fix the adaptive cruise control system issues in a 2019 Toyota Camry with detailed symptoms, diagnostic steps, and required tools.

Affected Component
Adaptive Cruise Control System

Symptoms

  • •Adaptive Cruise Control (ACC) light on the dashboard is illuminated or flashing.
  • •ACC does not engage or disengages erratically.
  • •Warning messages displayed on the instrument panel regarding the ACC system.
  • •Vehicle does not maintain set speed or fails to detect vehicles ahead.

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
  • •Torx and socket set
  • •Flathead and Phillips screwdrivers
  • •Clean microfiber cloth
  • •Multimeter (optional for electrical checks)
  • •Safety glasses and gloves

Additional Information

Affected Component
Adaptive Cruise Control System
Difficulty
medium
Severity
medium
Tools Required
6 items

Related Faults

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Fixing Adaptive Cruise Control Not Working in a 2019 Toyota Camry

Tools Required
  • OBD-II scanner
  • Torx and socket set
  • Flathead and Phillips screwdrivers
  • Clean microfiber cloth
  • Multimeter (optional for electrical checks)
  • Safety glasses and gloves
Repair Instructions
Step 1: Retrieve Error Codes
  1. Connect the OBD-II scanner to the vehicle’s OBD port (usually located under the dashboard).
  2. Turn the ignition to the "ON" position without starting the engine.
  3. Follow the scanner’s prompts to read any stored DTCs.
  4. Record the codes for reference.
Step 2: Inspect and Clean Radar Sensor
  1. Open the hood and locate the radar sensor behind the front grille.
  2. Remove any debris obstructing the sensor’s view. Use a clean microfiber cloth to wipe the sensor gently.
  3. Check that the sensor is aligned correctly and securely mounted in its bracket.
Step 3: Check for Software Updates
  1. Contact your local Toyota dealer or check the Toyota website for any software updates.
  2. If an update is available, schedule an appointment for installation.
Step 4: Inspect Steering Wheel Controls
  1. Visually inspect the cruise control buttons for any physical damage.
  2. If necessary, remove the airbag cover (following safety procedures) to check the wiring and connections behind the steering wheel.
Step 5: Brake System Inspection
  1. Check the brake lights by pressing the brake pedal. If they stay illuminated, inspect and replace the brake pedal switch.
  2. Confirm that brake fluid levels are within the recommended range and inspect brake pads for wear.
Step 6: Vehicle Speed Sensor Check
  1. If the ACC still does not work, test the vehicle speed sensor with a multimeter or by checking the DTCs for related faults.
  2. Replace the speed sensor if it is malfunctioning.
Step 7: Clear Codes and Test Drive
  1. After performing all inspections and repairs, clear the DTCs using the OBD-II scanner.
  2. Take the vehicle for a test drive to ensure the ACC is functioning properly. Engage the ACC and monitor its performance.
Conclusion

If after following these steps the adaptive cruise control is still not working, it may be necessary to take the vehicle to a certified Toyota technician for further diagnosis. There may be complex issues related to the vehicle’s computer system or other components that require professional equipment and expertise.