Mazda 6 Manual page 262

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