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2018 Eclipse Cross ES Blind Spot Warning Malfunction

0

Mike T. · rep 0 · May 22, 5:34 AM · 1 replies · solved · Question

Vehicle: 2018 Mitsubishi Eclipse Cross ES

Hi all,

My 2018 Mitsubishi Eclipse Cross ES has developed an issue with its Blind Spot Warning (BSW) system. The warning light on the dash comes on, and the system often says it's unavailable or malfunctioning. This happens even when the sensors are clean and there's no obvious obstruction.

It's pretty concerning because I rely on that feature, especially on the highway. Sometimes it works fine for a bit, then suddenly throws the error again. I've tried turning the car off and on, but it doesn't consistently fix it.

Has anyone else experienced this with their Eclipse Cross? Could it be a sensor issue, or something electrical? Any advice would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

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

0

ClearTheCode admin answer:

The Blind Spot Warning (BSW) system in your 2018 Eclipse Cross relies on radar sensors, typically located in the rear bumper, and a control module. A malfunction can be caused by several factors:

  1. Sensor Obstruction/Damage: Even if they appear clean, the sensors can be sensitive. Ensure there's no mud, ice, or even a slight bump/misalignment to the bumper cover where the sensors are located. A minor impact could shift a sensor.
  2. Wiring Issues: The wiring harness connecting the sensors to the BSW control module can become damaged, corroded, or loose over time. This is a common point of failure for exterior sensors.
  3. Faulty Sensor: One or both of the radar sensors themselves could be failing internally. They are electronic components exposed to the elements.
  4. BSW Control Module Failure: Less common, but the control module that processes the sensor data could be faulty.
  5. Calibration Issue: After a sensor replacement or even a minor bumper repair, the BSW system may require recalibration using specialized dealer tools.

Diagnostics & OBD Codes: When the BSW system malfunctions, it almost always triggers specific diagnostic trouble codes (DTCs) in the vehicle's computer system. These are typically manufacturer-specific codes (e.g., B-codes or U-codes) that pinpoint which sensor is faulty, if there's a communication error, or if the module itself is having issues. A professional scan tool is required to read these codes.

When to See a Shop: Given that this is a safety-related system, it's highly recommended to have your 2018 Eclipse Cross inspected by a Mitsubishi dealership or a specialist shop that has experience with advanced driver-assistance systems (ADAS). They have the necessary diagnostic equipment to read the specific BSW fault codes, test the sensors, inspect the wiring, and perform any required recalibration. Attempting to diagnose this without the proper tools can be difficult and may not resolve the underlying issue.

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