Mazda mx5 Owner's Manual page 245

NOTE
In the following cases, the Forward Sensing Camera (FSC) cannot detect target objects
correctly, and each system may be unable to operate normally.
The height of the vehicle ahead is low.
You drive your vehicle at the same speed as the vehicle ahead.
Headlights are not turned on during the night or when going through a tunnel.
In the following cases, the Forward Sensing Camera (FSC) may not be able to detect
target objects correctly.
When driving next to walls with no patterning (including fences and longitudinally
striped walls).
The tail lights of the vehicle ahead are turned off.
A vehicle is outside the illumination range of the headlights.
The vehicle is making a sharp turn, or ascending or descending a steep slope.
Entering or exiting a tunnel.
Heavy luggage is loaded causing the vehicle to tilt.
Strong light is shone at the front of the vehicle (back light or high-beam light from
on-coming vehicles).
There are many light emitters on the vehicle ahead.
When the vehicle ahead is not equipped with tail lights or the tail lights are turned
off at nighttime.
The vehicle ahead has a special shape.
When Driving
i-ACTIVSENSE
4–117