How do I troubleshoot my 2020 Ford Explorer's adaptive cruise control?

Ford Explorer Sixth Generation (2020-present)

Error Codes

medium

Difficulty

medium

Severity

3 min read

558 words

Problem Statement

Learn how to troubleshoot and repair the adaptive cruise control system on your 2020 Ford Explorer with step-by-step diagnostic and repair instructions.

Affected Component

adaptive cruise control system

Symptoms

•Adaptive cruise control (ACC) not engaging.
•ACC disengages unexpectedly.
•Warning messages on the dashboard related to ACC.
•ACC does not maintain set speed or responds erratically.

Diagnostic Steps

1
Read the Owner’s Manual.
2
Check for Warning Lights.
3
Verify System Activation.
4
Visual Inspection of cruise control buttons.
5
Inspect front-facing radar sensor for obstructions.
6
Scan for Diagnostic Trouble Codes (DTCs).

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 or Ford-specific diagnostic tool.
•Multimeter.
•Wiring diagram.

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Solution

Troubleshooting Adaptive Cruise Control on a 2020 Ford Explorer

Symptoms:

Adaptive cruise control (ACC) not engaging.
ACC disengages unexpectedly.
Warning messages on the dashboard related to ACC.
ACC does not maintain set speed or responds erratically.

Step 1: Initial Checks

Read the Owner’s Manual:
- Familiarize yourself with the adaptive cruise control system operation and limitations.
Check for Warning Lights:
- Look for any dashboard warning lights (e.g., ABS, traction control) that might indicate a related issue.
Verify System Activation:
- Ensure the adaptive cruise control is activated via the cruise control switch (typically located on the steering wheel).

Step 2: Inspect the Cruise Control System

Visual Inspection:
- Check the status of the cruise control buttons and indicators on the steering wheel for wear or damage.
- Ensure the steering wheel and stalk controls are clean and free of debris.
Sensor Check:
- Inspect the front-facing radar sensor (located behind the grille) for any obstructions such as dirt, ice, or debris that may impede its function.
- Ensure the sensor is properly mounted and not misaligned.

Step 3: Scan for Diagnostic Trouble Codes (DTCs)

Tools Required:
- OBD-II scanner or Ford-specific diagnostic tool.
Procedure:
- Connect the OBD-II scanner to the vehicle's diagnostic port (usually located under the dashboard near the driver's seat).
- Turn the ignition to the "On" position without starting the vehicle.
- Scan for DTCs related to the cruise control or advanced driver-assistance systems (ADAS).
- Record any codes found for further analysis.

Common DTCs and Their Meanings

C1000 - Front Radar Sensor Malfunction: Indicates a problem with the radar sensor.
C1300 - ABS Module Communication Error: Could affect adaptive features.
B1082 - Steering Wheel Control Module Fault: Indicates issues with the steering controls.

Repair Instructions

Step 1: Clearing DTCs

If you find any codes, clear them using the OBD-II scanner.
Test drive the vehicle to see if the issue reoccurs.

Step 2: Addressing Sensor Issues

Cleaning the Radar Sensor:
- Use a soft cloth and mild cleaner to remove any dirt or obstructions from the radar sensor.
- Avoid using abrasive materials that could scratch the sensor.
Alignment Check:
- If the sensor appears misaligned, refer to the service manual for specific alignment instructions or take it to a professional for recalibration.

Step 3: Inspecting Wiring and Connections

Tools Required:
- Multimeter
- Wiring diagram (from the service manual)
Procedure:
- Inspect the wiring harness connected to the radar sensor for any frays, corrosion, or disconnections.
- Use a multimeter to check for continuity in the wires.
- Repair or replace any damaged wiring.

Step 4: Steering Wheel Controls

Check Steering Wheel Module:
- Remove the airbag module (ensure to follow safety procedures).
- Inspect the connections to the cruise control switches for looseness or damage.
- If the switches are faulty, replace the steering wheel assembly or the specific switch.

Conclusion

After completing the diagnostic and repair steps, recheck the adaptive cruise control functionality. If the problem persists after performing these repairs, it may be necessary to consult a professional technician or a Ford dealership for further diagnosis and possible software updates or more complex repairs.