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

Toyota Camry XV70 (2018-2024)

Error Codes

medium

Difficulty

medium

Severity

3 min read

600 words

Problem Statement

Learn about typical 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

Symptoms

•ACC Not Engaging
•Erratic Speed Adjustment
•False Activation or Deactivation
•Warning Lights
•Inconsistent Distance Maintenance

Diagnostic Steps

1
Visual Inspection
2
Check for DTCs (Diagnostic Trouble Codes)
3
System Calibration Check
4
Test the System

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
•Digital Multimeter
•Screwdrivers (Phillips and flathead)
•Torque Wrench
•Scan Tool with Advanced Capabilities
•Cleaning Supplies

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Solution

Typical Problems with Adaptive Cruise Control in a 2018 Toyota Camry

Adaptive cruise control (ACC) systems are designed to maintain a set speed while automatically adjusting to the speed of the vehicle ahead. However, several issues can arise with the ACC system in a 2018 Toyota Camry (XV70). Below are common problems, symptoms, diagnostic steps, necessary tools, and repair instructions.

Common Symptoms of ACC Issues

ACC Not Engaging:
- The system fails to activate when the cruise control button is pressed.
Erratic Speed Adjustment:
- The vehicle accelerates or decelerates unexpectedly.
False Activation or Deactivation:
- The system turns off without driver input or activates under inappropriate conditions.
Warning Lights:
- Dashboard warning lights related to the adaptive cruise control or pre-collision system are illuminated.
Inconsistent Distance Maintenance:
- Difficulty in maintaining a safe following distance, either too close or too far.

Tools Required

OBD-II Scanner
Digital Multimeter
Screwdrivers (Phillips and flathead)
Torque Wrench
Scan Tool with Advanced Capabilities (for calibration)
Cleaning Supplies (for sensor cleaning)

Repair Instructions

1. Cleaning the Sensors

If visual inspection reveals dirty sensors:

Step 1: Clean the front radar and camera sensor gently using a microfiber cloth and a mild cleaner.
Step 2: Inspect the area for any debris and remove it.

2. Sensor Replacement

If sensors are damaged or malfunctioning:

Step 1: Disconnect the battery to ensure safety.
Step 2: Remove the front bumper cover (if necessary) to access the radar sensor.
Step 3: Unplug the sensor connector and remove the mounting screws.
Step 4: Install the new sensor by reversing these steps.
Step 5: Reconnect the battery.

3. Calibration

If calibration is needed after repairs:

Step 1: Connect the advanced scan tool to the OBD-II port.
Step 2: Follow the tool's instructions to enter the calibration mode.
Step 3: Drive the vehicle as specified by the scan tool to complete the calibration process.

4. Software Updates

If issues persist:

Step 1: Check for any available software updates for the vehicle's ECU.
Step 2: Use the scan tool to perform updates if necessary.

5. Component Replacement

If DTCs indicate faulty components:

Step 1: Follow the DTC to identify the faulty component (e.g., brake switch, ECU).
Step 2: Replace the faulty component as per the service manual instructions.
Step 3: Clear DTCs and test the system again.

Conclusion

The adaptive cruise control system in a 2018 Toyota Camry can experience various issues ranging from sensor obstructions to electronic malfunctions. Following the above diagnostics and repair steps can help resolve most problems effectively. If issues persist after trying these solutions, it may be necessary to consult with a certified technician or visit a dealership for further diagnosis and assistance.