2015-2024 Nissan AEB Warning Light Blinking TSB

Symptoms

Owners of 2015-2024 Nissan vehicles, including the Nissan Sentra, may observe the "Automatic Emergency Braking (AEB) warning light" or the "OFF is blinking" indicator on their dashboard. This blinking occurs without the light staying steadily illuminated, and typically without any related Diagnostic Trouble Codes (DTCs) stored in the vehicle's computer systems.

The blinking AEB warning light is commonly triggered by specific conditions affecting the lane camera's view through the windshield. These conditions include:

• Contamination or foreign material adhering to the lane camera viewing window on the windshield.
• Snow or frost forming on the lane camera viewing window while driving.
• The lane camera viewing window on the windshield being temporarily fogged up.
• Heavy rain or thick fog.
• Strong light shining directly from the front of the vehicle.
• Cabin temperatures exceeding approximately 104°F (40°C) in direct sunlight.
• Interference with the radar sensor from another radar source.
• Driving on roads lacking structures, such as long bridges, deserts, snow fields, or next to long walls.

Important Warnings

Nissan Technical Service Bulletin NTB19-042F explicitly states, "Do not replace the lane camera." This warning is crucial because the blinking light is often not indicative of a faulty camera but rather an environmental obstruction or condition. Replacing the lane camera unnecessarily will not resolve the issue and could lead to unwarranted repair costs.

Diagnosis and Repair Summary

When a 2015-2024 Nissan, such as a Nissan Sentra, exhibits the AEB warning light blinking without any associated DTCs, technicians are advised to inspect the windshield area in front of the lane camera. The primary diagnostic steps involve:

1. Check for DTCs: If any DTCs are present related to the Laser/Radar, ICC/ADAS, or Lane Camera systems, technicians should refer to the applicable Electronic Service Manual (ESM) for specific diagnosis.
2. Inspect Windshield: Examine the windshield area in front of the lane camera for dirt, frost, fog, or damage. The TSB highlights that the area around the "Viewing window" and "Lane camera" needs to be clean.
3. Clean/Repair Windshield: If the windshield is dirty, frosted, or fogged, technicians should use wipers, defroster, and/or a soft cloth to clean the area. For more extensive cleaning, reference is made to NTB13-028 for cleaning glass. If the windshield is damaged, NTB17-019 provides guidance for damaged glass.
4. Check Camera Mounting: Verify that both the lane camera and its bracket are mounted correctly. If improper mounting is found, it should be corrected according to the ESM.

The bulletin emphasizes that if these conditions are addressed, the AEB warning light should stop blinking.

What Owners Should Know

It is important for owners to understand that a blinking AEB warning light, especially without other symptoms or DTCs, often indicates the system's temporary inability to function optimally due to environmental factors. This is a detection of contamination or obstruction, not necessarily a malfunction of the system itself. Once the conditions causing the blinking subside (e.g., windshield is clean, fog clears, or environmental interference is gone), the AEB system should automatically resume normal operation.

Your Nissan dealer can perform the necessary inspection and cleaning. This bulletin helps technicians avoid unnecessary parts replacement, ensuring a correct and efficient resolution for the Nissan Sentra AEB blinking issue.

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NHTSA ID: 11014472