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2020 Model X Long Range Falcon Wing Door sensors acting up, phantom obstacles

0

Robert C. · rep 0 · May 22, 5:25 AM · 1 replies · solved · Question

Vehicle: 2020 Tesla Model X Long Range

My 2020 Tesla Model X Long Range has developed an annoying issue with its Falcon Wing Doors (FWD). Sometimes, when I try to open or close them, they'll stop abruptly, claiming there's an obstacle, even when there's clearly nothing in the way. It's like the sensors are detecting 'phantom' objects. Other times, they just refuse to open or close completely, getting stuck halfway.

I've tried cleaning all the ultrasonic sensors around the doors and the windows, but it doesn't seem to help. I've also done a soft reset of the car. Is this a common problem with the FWD sensors, or could it be a wiring issue? It's becoming a real hassle, especially when trying to get kids in and out of the car.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:25 AM

0

ClearTheCode admin answer:

The Falcon Wing Doors (FWD) on your 2020 Tesla Model X Long Range rely on a sophisticated array of ultrasonic and capacitive sensors to detect obstacles and prevent collisions. Phantom obstacle detection or erratic behavior often points to issues within this sensor system or its control module.

Troubleshooting Steps:

  1. Thorough Sensor Cleaning: Re-clean all FWD sensors, including those along the door edges, window edges, and the main body. Use a soft cloth and mild cleaner. Even a thin film of dirt, wax, or water spots can interfere with sensor readings.
  2. Inspect for Physical Damage: Carefully inspect the FWDs and surrounding body panels for any subtle dents, misalignments, or damage that might be affecting sensor placement or creating a physical obstruction that the sensors are correctly, but unexpectedly, detecting.
  3. Software Update: Ensure your vehicle's software is fully updated. Tesla frequently releases updates that improve FWD sensor logic and reliability.
  4. Recalibration: In some cases, the FWDs might need recalibration. This is typically done by Tesla service, but sometimes a full power cycle (hard reset) can help reset sensor parameters.

Potential Causes:

  • Faulty Ultrasonic Sensors: Individual ultrasonic sensors can fail or become intermittent, sending incorrect data to the FWD control module.
  • Capacitive Strip Issues: The capacitive strips along the door edges, which detect contact, can sometimes become faulty or damaged, leading to false positives.
  • Wiring Harness Damage: A pinched or damaged wiring harness leading to one or more sensors can cause intermittent communication errors.
  • FWD Control Module Glitch: The electronic control unit (ECU) responsible for managing the FWDs might be experiencing a software bug or, less commonly, a hardware fault.
  • Environmental Interference: While less common, certain types of electromagnetic interference or even heavy rain can sometimes affect sensor performance.

When to See a Shop:

If the phantom obstacle detection or erratic FWD behavior persists after thorough cleaning and software checks, it's essential to schedule a service appointment with Tesla. They have specialized diagnostic tools to test each individual sensor (ultrasonic and capacitive) and the FWD control module. They can identify specific error codes related to sensor failures or communication issues, such as FWD_sensor_fault or FWD_obstruction_detection_error, and perform necessary repairs or replacements. Given the complexity and safety aspects of the FWDs, professional diagnosis is highly recommended.

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