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2022 Eclipse Cross SEL - Blind Spot Warning System Error

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Kevin B. · rep 0 · May 22, 5:34 AM · 1 replies · solved · Question

Vehicle: 2022 Mitsubishi Eclipse Cross SEL

Hello everyone,

I'm getting a persistent "Service BSW System" message on the dash of my 2022 Mitsubishi Eclipse Cross SEL, and the blind spot warning lights in the mirrors aren't working at all. It started a few days ago and hasn't gone away. I've tried cleaning the rear bumper where the sensors are located, but they look perfectly clean.

Is this a common issue with the Eclipse Cross? What could be causing this, and is there anything I can try before taking it to the dealership? It's a crucial safety feature, so I'd like to get it fixed soon.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:34 AM

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ClearTheCode admin answer:

The "Service BSW System" message on your 2022 Mitsubishi Eclipse Cross SEL indicates a fault within the Blind Spot Warning (BSW) system. This system relies on radar sensors, usually located behind the rear bumper, and a control module to detect vehicles in your blind spots.

Here's a breakdown of potential causes and steps:

  1. Sensor Obstruction/Damage: While you've cleaned the exterior, sometimes even a minor impact or internal damage to the sensor itself can cause a fault. Ensure there's no physical damage to the bumper cover directly over the sensor locations (typically on the rear corners).
  2. Wiring Harness Issues: The wiring connecting the radar sensors to the BSW control module can become damaged, corroded, or disconnected. This is particularly common if the vehicle has had any rear-end work or if the wiring is exposed to road debris.
  3. BSW Control Module Fault: The module itself, which processes the radar data, can fail. This is an internal electronic component failure that would require replacement.
  4. Software Glitch/Calibration: Sometimes, a temporary software glitch can cause the system to malfunction. A simple battery disconnect (for 15-30 minutes) might reset some modules, but this is a long shot. More likely, if a sensor or module is replaced, the system will require recalibration using specialized diagnostic tools.
  5. Diagnostic Trouble Codes (DTCs): The BSW system will store specific diagnostic trouble codes (DTCs) in the vehicle's computer when a fault occurs. These codes (e.g., U0155, B1XXX series codes) are crucial for pinpointing the exact problem.

When to See a Shop:

Since the BSW system is a complex safety feature involving radar technology, it's highly recommended to have your Eclipse Cross inspected by a Mitsubishi dealership or a shop with advanced diagnostic capabilities. They can read the specific BSW DTCs, test the sensors, check wiring continuity, and perform any necessary recalibrations or module replacements. DIY attempts beyond visual inspection are generally not advisable for this system.

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