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How do I troubleshoot the adaptive cruise control malfunctions in a 2020 Toyota Camry? - Toyota Camry
Home/Cars/Toyota/Camry/Eighth Generation (2018-present)/How do I troubleshoot the adaptive cruise control malfunctions in a 2020 Toyota Camry?

How do I troubleshoot the adaptive cruise control malfunctions in a 2020 Toyota Camry?

Toyota Camry Eighth Generation (2018-present)

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

Problem Statement

Learn how to troubleshoot and repair adaptive cruise control malfunctions in a 2020 Toyota Camry with detailed symptoms, diagnostic steps, and repair instructions.

Affected Component
adaptive cruise control system

Symptoms

  • •Adaptive Cruise Control Not Engaging
  • •Inconsistent Speed Maintenance
  • •Warning Lights
  • •Unexpected Braking
  • •System Not Detecting Vehicles

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
  • •Wiring diagram
  • •Basic hand tools
  • •Socket set
  • •Screwdrivers

Additional Information

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

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Troubleshooting Adaptive Cruise Control Malfunctions in a 2020 Toyota Camry

Step 1: Initial Inspection
  • Visual Inspection: Check for any visible damage to the front grille or sensors.
  • Read Diagnostic Codes: Use an OBD-II scanner to read any fault codes related to the cruise control system.
Step 2: Check for Software Updates
  • Toyota TSB: Verify if there are any Technical Service Bulletins (TSBs) related to the adaptive cruise control system. If there are updates available, proceed to update the vehicle’s software through your dealership.
Step 3: Inspect Sensors
  • Location: The adaptive cruise control system typically uses a forward-facing radar sensor located behind the front grille and a camera mounted near the rearview mirror.
  • Cleaning: Ensure that the radar sensor and camera are clean and free from obstructions (like dirt, ice, or snow).
Step 4: Battery Voltage Check
  • Tools Required: Multimeter
  • Procedure:
    1. Turn off the engine.
    2. Connect the multimeter to the battery terminals.
    3. Check that the battery voltage is within the normal range (12.4 - 12.7 volts for a healthy battery). If below 12.4 volts, charge or replace the battery.
Step 5: Check System Settings
  • User Settings: Ensure that the adaptive cruise control feature is enabled in the vehicle settings. This can usually be accessed via the infotainment system.
Step 6: Inspect Wiring and Connections
  • Tools Required: Wiring diagram (for your specific model), multimeter, basic hand tools.
  • Procedure:
    1. Disconnect the negative terminal of the battery.
    2. Inspect the wiring harness connected to the radar sensor and camera for any signs of wear, corrosion, or disconnection.
    3. Use a multimeter to check for continuity in the wiring.
Repair Instructions
Repairing or Replacing the Radar Sensor
  1. Tools Required: Socket set, screwdrivers, new radar sensor (if required).
  2. Procedure:
    • Remove the front grille by unscrewing the necessary fasteners.
    • Disconnect the wiring harness from the radar sensor.
    • Remove the sensor mounting bolts and take out the sensor.
    • Install the new radar sensor by reversing the removal steps.
    • Reconnect the wiring harness and grille.
Repairing or Replacing the Camera
  1. Tools Required: Socket set, screwdrivers, new camera (if necessary).
  2. Procedure:
    • Remove the rearview mirror (if applicable) by unscrewing it from the mount.
    • Disconnect the camera wiring harness.
    • Replace with a new camera if faulty.
    • Reconnect the wiring and remount the rearview mirror.
Clearing Codes and Testing
  1. Tools Required: OBD-II scanner.
  2. Procedure:
    • Reconnect the battery's negative terminal.
    • Use the OBD-II scanner to clear any diagnostic trouble codes.
    • Test the adaptive cruise control by engaging it on a clear, open road.
Final Verification
  • Road Test: Take the vehicle for a test drive to verify that the adaptive cruise control functions as expected. Monitor for any warning lights or malfunctions.
Conclusion

If the adaptive cruise control system continues to malfunction after following these troubleshooting steps, it may be necessary to consult a professional technician or visit a Toyota dealership for further diagnostics. Advanced diagnostic equipment may be required to pinpoint issues such as software problems or internal system failures.