This bulletin applies to 2016-2019 Mazda Miata MX-5 vehicles. Some vehicles may have DTC C1001:92 stored in memory. This code sets as a past record for low visibility of the Forward Sensing Camera (FSC). It does not mean that there is an actual FSC defect.

In some cases, the customer may have a concern with the Lane Departure Warning System (LDWS) and/or High Beam Control system (HBC). In other cases, this DTC might be found without a related customer concern.

If the vehicle has this DTC, do not replace the FSC. The vehicle might store C1001:92 and stop the FSC function while driving under the following conditions:

1. At night, when there is no artificial lighting such as a traffic signal, street light or reflective surface.

2. When direct or indirect sunlight makes forward visibility difficult (backlight).

3. When it’s hard to see the traffic lane due to a wet or snow covered road reflecting lights.

4. When visibility is poor in front of the vehicle due to fog.

5. When driving on a road without markings.

6. In conditions where the windshield fogs easily.

If the customer has concerns regarding the LDWS and/or HBC malfunction, confirm when the issue first happened. If the issue happened during one of the driving conditions above, explain the following two items to the customer:

  • The FSC stops the LDWS and/or HBC functions temporarily when the FSC can’t recognize the traffic lane or decides the front view is obstructed.
  • This is not a failure of the FSC. The system is disabled to avoid unintended operation.

The HBC system switches to low beam when:

  • You are approaching a vehicle or a vehicle is approaching you.
  • Driving on roads lined with street lights or well-lit cities and towns.
  • At speeds lower than 12 mph.
Example of direct or reflected sunlight on the FSC.

 Example of direct or reflected sunlight on the FSC.

Example of strong halo from oncoming vehicle.

Example of strong halo from oncoming vehicle.

Example of backlight from tunnel exit.

Example of backlight from tunnel exit.

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