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2023 Ascent Touring EyeSight Disabled Warning & Unintended Braking

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Mike T. · rep 0 · May 25, 2:16 AM · 1 replies · solved · Question

Vehicle: 2023 Subaru Ascent Touring

Hello, I'm experiencing a worrying issue with my 2023 Subaru Ascent Touring. The EyeSight system keeps showing a 'temporarily disabled' warning, and sometimes the pre-collision braking system activates unnecessarily, even when there's nothing in front of me. This happens randomly, not just in bad weather or direct sunlight.

I've cleaned the windshield around the cameras thoroughly multiple times, and there are no visible cracks or chips. It's really unsettling and potentially dangerous when the car brakes itself for no reason. Has anyone else with a newer Ascent had similar problems? What could be causing this, and what should I do?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:16 AM

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ClearTheCode admin answer:

An EyeSight system malfunction, especially with unintended braking, is a serious safety concern and requires immediate attention. The EyeSight system relies on stereoscopic cameras mounted at the top of the windshield, and its proper functioning is critical for safety features.

Causes:

  • Misaligned Cameras: This is a common cause, often occurring after a windshield replacement (even if done correctly, recalibration is needed) or a minor front-end impact.
  • Windshield Damage: Even tiny chips, scratches, or internal delamination in the camera's field of view can interfere with its operation, even if not immediately visible to the naked eye.
  • Faulty EyeSight Control Module: The module itself, which processes the camera data, could be failing.
  • Wiring Issues: Damaged or loose wiring to the EyeSight cameras or module.
  • Software Glitch: Less common, but possible, a software bug could cause erroneous readings or system disabling.
  • Weak 12V Battery: An unstable power supply can sometimes cause advanced electronic systems to malfunction.

Diagnostic Steps (Limited for owner):

  1. Thorough Windshield Inspection: Re-examine the windshield very carefully, especially the area directly in front of the EyeSight cameras, for any minute chips, cracks, or imperfections that could obscure the cameras' view.
  2. Check for Recalls/TSBs: Contact your Subaru dealership or check the Subaru owner's website for any active recalls or Technical Service Bulletins (TSBs) related to EyeSight performance on your 2023 Ascent.
  3. Battery Health Check: Ensure your vehicle's 12V battery is in good health and providing stable voltage. A weak battery can cause various electronic systems to act erratically.

Common OBD Codes:

  • EyeSight issues typically generate manufacturer-specific C-codes (Chassis) or U-codes (Network Communication) that are not generic OBD-II. Examples might include C1A10 (EyeSight Camera Malfunction), C1A11 (EyeSight Control Unit Malfunction), or U0100 (Lost Communication with ECM/PCM A).

When to See a Shop: Immediately. Unintended braking and a disabled EyeSight system are significant safety risks. EyeSight system issues almost always require professional diagnosis and calibration. The cameras are extremely sensitive and require specialized equipment and expertise to align correctly. A Subaru dealership is the best option as they have the proprietary diagnostic tools, software, and training to accurately diagnose, recalibrate, and repair the EyeSight system. Do not delay seeking professional help for this issue.

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