The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

False Collision Warnings and Lane Keep Assist Malfunctions on 2020 TLX

0

David L. · rep 0 · May 26, 3:58 AM · 1 replies · solved · Question

Vehicle: 2020 Acura TLX Technology Package

I've been experiencing some really concerning issues with the AcuraWatch suite in my 2020 Acura TLX Technology Package. Specifically, the Collision Mitigation Braking System (CMBS) has been giving me false warnings.

It often flashes 'BRAKE' and beeps loudly when there's no obstruction, sometimes even on an open road or when passing a parked car. Additionally, the Lane Keep Assist System (LKAS) sometimes fails to activate or pulls the car erratically, especially in light rain or direct sunlight.

It's making me lose confidence in the safety features. Has anyone else had these kinds of phantom warnings or LKAS problems with their 2020 TLX? What was the solution?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:58 AM

0

ClearTheCode admin answer:

False collision warnings and erratic behavior from advanced driver-assistance systems (ADAS) like AcuraWatch can be alarming. These systems rely on complex radar and camera sensors, and their sensitivity can sometimes lead to perceived malfunctions. The 2020 Acura TLX, with its integrated safety features, can experience these issues.

Here's a breakdown of potential causes and solutions:

  1. Sensor Obstruction: The most common cause of false warnings. Ensure the radar sensor (located behind the Acura emblem on the grille) and the camera sensor (mounted at the top center of the windshield) are clean and free from dirt, ice, snow, or even a bug splat. Even a small obstruction can interfere with their operation.
  2. Environmental Factors: Heavy rain, dense fog, direct sunlight, or even reflections from wet roads can temporarily confuse the sensors, leading to false positives or system deactivation. This is often normal system behavior under challenging conditions.
  3. Recalibration Needs: If your vehicle has had any front-end damage, even minor, or if the windshield has been replaced, the ADAS sensors may require recalibration. Misaligned sensors will provide inaccurate data.
  4. Causes:
    • Software Glitches: Less common but possible, a software bug could cause misinterpretations.
    • Sensor Malfunction: A faulty radar unit or camera module could be sending incorrect data.
    • Wiring Issues: Damaged or loose wiring to the sensors can interrupt communication.

When to See a Shop: If cleaning the sensors doesn't resolve the issue, and the problems persist under clear driving conditions, it's crucial to take your 2020 TLX to an Acura dealership. They have specialized diagnostic tools to check for specific ADAS-related fault codes (often C-codes, such as C1000 for CMBS Sensor Malfunction or C1010 for LKAS Camera Malfunction). They can accurately diagnose sensor malfunctions, perform necessary recalibrations, or replace faulty components. Do not ignore persistent ADAS warnings, as they are critical safety features.

Menu

Help & account