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2020 RDX Blind Spot Information System Malfunction

0

Kim L. · rep 0 · May 22, 4:58 AM · 1 replies · solved · Question

Vehicle: 2020 Acura RDX Advance

My 2020 Acura RDX Advance has an intermittent issue with the Blind Spot Information (BSI) system. Sometimes when I start the car, the BSI warning light comes on, and the system is unavailable. The message on the dash says 'BSI System Malfunction'.

It might clear itself after a restart or driving for a bit, but it's becoming more frequent. I've checked for any visible obstructions on the rear bumper where the sensors are, but everything looks clear. I'm worried about safety, as I rely on this feature.

Is this a known bug or a sensor issue? Any advice on what I should check before taking it to the dealer?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:58 AM

0

ClearTheCode admin answer:

An intermittent 'BSI System Malfunction' on your 2020 Acura RDX Advance can be concerning, as it impacts a key safety feature. Here's a breakdown of potential causes and steps:

  1. Sensor Obstruction/Damage: While you've checked for visible obstructions, even minor dirt, ice, or a subtle bump to the bumper can affect the radar sensors located behind the rear bumper fascia. Ensure the area is completely clean and free of any debris.
  2. Wiring or Connector Issues: The BSI system relies on radar sensors and a control module. Loose, corroded, or damaged wiring and connectors to these sensors or the module can cause intermittent communication errors, leading to the malfunction message.
  3. Software Glitch: Sometimes, a software glitch in the BSI control module can cause these intermittent issues. A dealer might have a software update available that addresses known bugs.
  4. Faulty BSI Sensor or Module: If wiring and software are ruled out, one of the radar sensors or the BSI control module itself could be failing. These components are sensitive and can be affected by moisture or internal defects.
  5. OBD-II Codes: A diagnostic scan will likely reveal specific codes related to the BSI system. Common codes include:
    • B1870: BSI System Malfunction (General)
    • B1871/B1872: Right/Left BSI Sensor Malfunction

When to See a Shop: Given that this is a safety system, it's best to have your 2020 Acura RDX inspected by an Acura dealership or a reputable shop with experience in ADAS (Advanced Driver-Assistance Systems). They have specialized diagnostic tools to pinpoint which sensor or component is at fault and can perform any necessary calibrations or software updates.

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